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ANZ230 Boston HarborExpires:202512151900;;608714 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ230-151900- Boston Harbor- 106 AM EST Mon Dec 15 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON... .REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Waves around 2 ft. .MON...NW winds 20 to 25 kt, becoming W 15 to 20 kt in the afternoon. Gusts up to 30 kt. Waves around 2 ft. .MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. .TUE...W winds 5 to 10 kt. Waves 1 foot or less. .TUE NIGHT THROUGH WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. .THU...S winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Waves around 2 ft. Rain likely. .FRI NIGHT...NW winds 25 to 30 kt. Waves around 2 ft, except 3 to 5 ft at the outer harbor entrance. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ231 Cape Cod BayExpires:202512151900;;608705 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ231-151900- Cape Cod Bay- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... .REST OF TONIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. Wave Detail: NW 6 ft at 7 seconds and SE 1 foot at 10 seconds. Light freezing spray. .MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: NW 6 ft at 7 seconds and N 5 ft at 8 seconds. Light freezing spray. .MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 7 seconds and SE 1 foot at 10 seconds. .TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 6 seconds and NE 1 foot at 7 seconds. .TUE NIGHT AND WED...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and N 1 foot at 5 seconds. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 10 seconds. .THU...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Gusts up to 40 kt. Seas 4 to 6 ft. Rain likely. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ232 Nantucket SoundExpires:202512151900;;608709 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ232-151900- Nantucket Sound- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... ...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING... .REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 3 to 5 ft. Wave Detail: N 5 ft at 5 seconds and W 1 foot at 7 seconds. Light freezing spray. A chance of snow showers. .MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 4 seconds and NE 3 ft at 8 seconds. Light freezing spray. .MON NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SW 2 ft at 7 seconds. .TUE...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SW 1 foot at 7 seconds. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and N 1 foot at 6 seconds. .WED AND WED NIGHT...NW winds 20 to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at 11 seconds. .THU...S winds 15 to 20 kt. Seas 2 to 3 ft. .THU NIGHT AND FRI...S winds 25 to 35 kt, becoming SW. Seas 4 to 6 ft. Rain likely. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 30 to 35 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ233 Vinyard SoundExpires:202512151900;;608710 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ233-151900- Vineyard Sound- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... ...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING... .REST OF TONIGHT...NW winds 25 to 30 kt. Seas 3 to 4 ft. Wave Detail: N 4 ft at 5 seconds and S 2 ft at 10 seconds. Light freezing spray. .MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and NE 2 ft at 7 seconds. Light freezing spray. .MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and NE 2 ft at 8 seconds. .TUE...W winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and NE 1 foot at 7 seconds. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: W 4 ft at 4 seconds and SE 1 foot at 11 seconds. .WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and W 1 foot at 4 seconds. .WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming NW 5 to 10 kt after midnight. Seas 3 to 5 ft. .THU...S winds 15 to 20 kt. Seas 2 to 4 ft. .THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas 4 to 6 ft. Rain likely. .FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 5 to 7 ft. Rain likely. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 30 to 35 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ234 Buzzards BayExpires:202512151900;;608711 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ234-151900- Buzzards Bay- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... ...FREEZING SPRAY ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING... .REST OF TONIGHT...NW winds 25 to 30 kt. Seas around 3 ft. Wave Detail: W 3 ft at 5 seconds and N 2 ft at 5 seconds. Light freezing spray. .MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and NE 3 ft at 7 seconds. Light freezing spray. .MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and NE 2 ft at 7 seconds. .TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and NE 1 foot at 7 seconds. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: W 4 ft at 4 seconds and N 1 foot at 5 seconds. .WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds and SE 1 foot at 10 seconds. .WED NIGHT...W winds 15 to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. .THU...S winds 15 to 20 kt. Seas 2 to 3 ft. .THU NIGHT AND FRI...S winds 30 to 40 kt, becoming SW. Seas 4 to 6 ft. Rain likely. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ235 Rhode Island SoundExpires:202512151900;;608712 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ235-151900- Rhode Island Sound- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... .REST OF TONIGHT...NW winds 25 to 30 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft at 6 seconds and S 3 ft at 10 seconds. .MON...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: W 5 ft at 6 seconds and S 3 ft at 10 seconds. .MON NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and NE 1 foot at 8 seconds. .TUE...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and SE 1 foot at 11 seconds. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Seas around 2 ft, building to 3 to 5 ft after midnight. Wave Detail: SW 2 ft at 6 seconds and W 1 foot at 3 seconds, becoming SW 5 ft at 5 seconds and SE 1 foot at 11 seconds. .WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: SW 7 ft at 6 seconds and SE 1 foot at 10 seconds. .WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming NW 10 to 15 kt after midnight. Seas 4 to 6 ft. .THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. .THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas 5 to 8 ft. Rain likely. .FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 6 to 9 ft. Rain likely. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 9 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ236 Narragansett BayExpires:202512151900;;608715 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ236-151900- Narragansett Bay- 106 AM EST Mon Dec 15 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON... .REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Waves around 3 ft. .MON...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .MON NIGHT...W winds 5 to 10 kt. Waves around 2 ft. .TUE...W winds 5 to 10 kt, becoming SW in the afternoon. Waves around 2 ft. .TUE NIGHT AND WED...SW winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 4 ft. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 4 ft. .THU...S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .THU NIGHT...S winds 30 to 35 kt with gusts up to 40 kt. Waves 3 to 5 ft. Rain likely. .FRI...SW winds 25 to 35 kt with gusts up to 40 kt. Waves 4 to 6 ft. Rain likely. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Waves 2 to 3 ft, except 5 to 7 ft at the bay entrance. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
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ANZ237 Block Island SoundExpires:202512151900;;608713 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ237-151900- Block Island Sound- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... .REST OF TONIGHT...NW winds around 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: N 4 ft at 5 seconds and S 2 ft at 9 seconds. Light freezing spray. .MON...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and S 2 ft at 10 seconds. Light freezing spray in the morning. .MON NIGHT...W winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and N 1 foot at 4 seconds. .TUE...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SW 1 foot at 7 seconds. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 11 seconds. .WED AND WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at 10 seconds. .THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .THU NIGHT AND FRI...S winds 30 to 35 kt, becoming SW 25 to 35 kt. Gusts up to 45 kt. Seas 5 to 8 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to 8 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ250 Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine SanctuaryExpires:202512151900;;608703 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ250-151900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... .REST OF TONIGHT...NW winds 25 to 30 kt. Seas 5 to 8 ft. Wave Detail: N 8 ft at 7 seconds and SE 1 foot at 11 seconds. .MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Seas 5 to 8 ft. Wave Detail: N 7 ft at 7 seconds and SE 2 ft at 11 seconds. .MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: W 5 ft at 5 seconds and NE 3 ft at 7 seconds, becoming W 4 ft at 5 seconds and NE 1 foot at 7 seconds. .TUE...W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and NE 1 foot at 7 seconds. .TUE NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt with gusts up to 30 kt after midnight. Seas 2 to 3 ft, building to 3 to 5 ft after midnight. Wave Detail: W 3 ft at 3 seconds and SE 1 foot at 11 seconds, becoming SW 4 ft at 4 seconds and SE 1 foot at 11 seconds. .WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 5 ft at 5 seconds and SE 1 foot at 10 seconds. .WED NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. .THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Gusts up to 40 kt. Seas 4 to 6 ft. Rain likely. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to 8 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ251 Massachusetts Bay and Ipswich BayExpires:202512151900;;608704 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ251-151900- Massachusetts Bay and Ipswich Bay- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... .REST OF TONIGHT...NW winds 25 to 30 kt. Seas 3 to 5 ft. Wave Detail: N 5 ft at 6 seconds and SE 1 foot at 10 seconds. .MON...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NE 5 ft at 8 seconds and NW 4 ft at 4 seconds. .MON NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and NE 3 ft at 7 seconds. .TUE...W winds 10 to 15 kt, becoming SW 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and N 1 foot at 6 seconds. .TUE NIGHT AND WED...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and N 1 foot at 4 seconds. .WED NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 10 seconds. .THU...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. .THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Seas 3 to 4 ft. Rain likely. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ254 Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NMExpires:202512151900;;608706 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ254-151900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... .REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 9 ft. Wave Detail: NW 8 ft at 7 seconds and N 7 ft at 8 seconds. Light freezing spray. A chance of snow showers. Vsby 1 to 3 NM. .MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Seas 6 to 9 ft. Wave Detail: W 7 ft at 7 seconds and N 7 ft at 8 seconds. Light freezing spray in the morning. .MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft, subsiding to 3 to 5 ft after midnight. Wave Detail: W 6 ft at 6 seconds and N 5 ft at 8 seconds, becoming W 4 ft at 6 seconds and NE 3 ft at 8 seconds. .TUE...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and NE 2 ft at 7 seconds. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft, building to 3 to 5 ft after midnight. Wave Detail: N 2 ft at 5 seconds and SW 2 ft at 5 seconds, becoming SW 4 ft at 5 seconds and N 1 foot at 4 seconds. .WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 5 ft at 6 seconds and S 2 ft at 10 seconds. .THU...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .THU NIGHT...S winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 ft. Rain likely. .FRI...SW winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to 9 ft. Rain likely. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 7 to 10 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ255 Coastal waters extending out to 25 NM south of Martha’s Vineyard and NantucketExpires:202512151900;;608707 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ255-151900- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... .REST OF TONIGHT...NW winds 30 to 35 kt. Seas 6 to 9 ft. Wave Detail: W 9 ft at 7 seconds and N 3 ft at 6 seconds. Light freezing spray. A chance of snow showers. Vsby 1 to 3 NM. .MON...NW winds 25 to 30 kt with gusts up to 35 kt, diminishing to 20 to 25 kt in the afternoon. Seas 6 to 9 ft. Wave Detail: W 8 ft at 7 seconds and NE 3 ft at 8 seconds. Light freezing spray. .MON NIGHT...W winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Seas 5 to 7 ft. Wave Detail: W 6 ft at 6 seconds and NE 2 ft at 9 seconds. .TUE...W winds 15 to 20 kt, diminishing to around 10 kt in the afternoon. Seas 4 to 6 ft, subsiding to 2 to 4 ft in the afternoon. Wave Detail: W 4 ft at 7 seconds and NW 1 foot at 4 seconds, becoming SW 4 ft at 7 seconds and NW 1 foot at 4 seconds. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 3 ft, building to 4 to 6 ft after midnight. Wave Detail: SW 3 ft at 6 seconds and W 1 foot at 3 seconds, becoming W 6 ft at 5 seconds and SE 1 foot at 10 seconds. .WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and W 1 foot at 4 seconds. .THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas 6 to 9 ft. Rain likely. .FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to 11 ft. Rain likely. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to 11 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ256 Coastal waters from Montauk NY to Martha’s Vineyard extending out to 20 NM south of Block IslandExpires:202512151900;;608708 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ256-151900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 106 AM EST Mon Dec 15 2025 ...GALE WARNING IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... .REST OF TONIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 8 ft. Wave Detail: W 8 ft at 7 seconds and S 3 ft at 10 seconds. .MON...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Seas 5 to 8 ft. Wave Detail: W 7 ft at 7 seconds and S 3 ft at 10 seconds. .MON NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and NE 1 foot at 8 seconds. A chance of snow after midnight. .TUE...W winds 15 to 20 kt, diminishing to around 10 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and SE 1 foot at 11 seconds. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 3 ft, building to 4 to 6 ft after midnight. Wave Detail: SW 3 ft at 6 seconds and SE 1 foot at 11 seconds, becoming W 6 ft at 5 seconds and SE 1 foot at 10 seconds. .WED AND WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. Wave Detail: SW 8 ft at 7 seconds and W 1 foot at 4 seconds. .THU...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .THU NIGHT...S winds 30 to 40 kt with gusts up to 45 kt. Seas 6 to 9 ft. Rain likely. .FRI...SW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to 11 ft. Rain likely. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 30 to 40 kt with gusts up to 45 kt. Seas 8 to 11 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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ANZ230 Boston HarborExpires:202512151900;;608714 FZUS51 KBOX 150607 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 106 AM EST Mon Dec 15 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ230-151900- Boston Harbor- 106 AM EST Mon Dec 15 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON... .REST OF TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Waves around 2 ft. .MON...NW winds 20 to 25 kt, becoming W 15 to 20 kt in the afternoon. Gusts up to 30 kt. Waves around 2 ft. .MON NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. .TUE...W winds 5 to 10 kt. Waves 1 foot or less. .TUE NIGHT THROUGH WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. .THU...S winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU NIGHT AND FRI...S winds 25 to 30 kt, becoming SW. Waves around 2 ft. Rain likely. .FRI NIGHT...NW winds 25 to 30 kt. Waves around 2 ft, except 3 to 5 ft at the outer harbor entrance. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$
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