


Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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073 FZUS51 KBOX 122004 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 404 PM EDT Sun Oct 12 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-130900- 404 PM EDT Sun Oct 12 2025 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres remains over the Maritimes through Mon. A coastal storm to our S will impact the waters into Tues. Widespread rain with poor visibility at times into Tue. Decreasing winds and rain are expected through midweek as high pres returns from the NW. $$ ANZ250-130900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 404 PM EDT Sun Oct 12 2025 ...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT... .TONIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 8 to 11 ft, building to 11 to 15 ft after midnight. Wave Detail: NE 8 ft at 7 seconds and SE 8 ft at 13 seconds, becoming E 14 ft at 11 seconds and NE 8 ft at 7 seconds. Rain. Vsby 1 to 3 NM. .MON...NE winds 30 to 35 kt with gusts up to 40 kt. Seas 12 to 16 ft. Wave Detail: E 16 ft at 12 seconds and NE 9 ft at 8 seconds. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .MON NIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 11 to 15 ft. Wave Detail: E 15 ft at 12 seconds and NE 7 ft at 9 seconds. Rain. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .TUE...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 9 to 12 ft. Wave Detail: E 11 ft at 11 seconds and NE 6 ft at 6 seconds. Rain in the morning, then showers in the afternoon. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .TUE NIGHT...N winds 15 to 20 kt, diminishing to around 10 kt after midnight. Gusts up to 25 kt. Seas 7 to 9 ft, subsiding to 5 to 7 ft after midnight. Wave Detail: E 8 ft at 11 seconds and NE 4 ft at 6 seconds, becoming SE 7 ft at 10 seconds and NE 2 ft at 5 seconds. Showers likely, mainly in the evening with vsby 1 to 3 NM. .WED...N winds 10 to 15 kt with gusts up to 20 kt, increasing to 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas 5 to 6 ft. Wave Detail: SE 6 ft at 10 seconds and N 3 ft at 4 seconds. .WED NIGHT...N winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 8 ft. A chance of showers after midnight. .THU...N winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to 9 ft. A chance of showers. .THU NIGHT AND FRI...N winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to 9 ft. .FRI NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 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. $$ ANZ251-130900- Massachusetts Bay and Ipswich Bay- 404 PM EDT Sun Oct 12 2025 ...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT... .TONIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 6 to 9 ft, building to 8 to 11 ft after midnight. Wave Detail: E 9 ft at 7 seconds and SE 5 ft at 8 seconds, becoming NE 10 ft at 7 seconds and E 9 ft at 9 seconds. Rain. Vsby 1 to 3 NM. .MON...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 9 to 13 ft. Wave Detail: E 13 ft at 10 seconds and NE 9 ft at 8 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...NE winds 25 to 30 kt. Gusts up to 40 kt in the evening. Seas 9 to 13 ft. Wave Detail: E 12 ft at 11 seconds and NE 8 ft at 9 seconds. Rain. Vsby 1 to 3 NM. .TUE...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 7 to 10 ft. Wave Detail: E 10 ft at 11 seconds and NE 7 ft at 7 seconds. Rain in the morning, then showers likely in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 15 to 20 kt with gusts up to 25 kt, diminishing to around 10 kt after midnight. Seas 5 to 7 ft. Wave Detail: E 7 ft at 11 seconds and NE 5 ft at 7 seconds. A chance of showers. .WED AND WED NIGHT...N winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: N 5 ft at 5 seconds and E 5 ft at 10 seconds. .THU THROUGH 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. $$ ANZ231-130900- Cape Cod Bay- 404 PM EDT Sun Oct 12 2025 ...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT... .TONIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 8 ft. Wave Detail: SE 8 ft at 12 seconds and NE 7 ft at 5 seconds. Rain. Vsby 1 to 3 NM. .MON...E winds 25 to 30 kt with gusts up to 45 kt. Seas 6 to 9 ft. Wave Detail: E 9 ft at 11 seconds and NE 7 ft at 6 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...E winds 25 to 30 kt with gusts up to 40 kt, becoming NE 20 to 25 kt with gusts up to 30 kt after midnight. Seas 6 to 9 ft, subsiding to 5 to 7 ft after midnight. Wave Detail: E 9 ft at 12 seconds and NE 6 ft at 6 seconds, becoming E 7 ft at 11 seconds and N 6 ft at 6 seconds. Rain with a chance of tstms. Vsby 1 NM or less. .TUE...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 11 seconds and E 6 ft at 10 seconds. Rain in the morning, then showers in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and N 5 ft at 5 seconds. Showers likely, mainly in the evening. .WED...N winds 10 to 15 kt with gusts up to 20 kt, increasing to 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and N 3 ft at 5 seconds. A chance of showers in the afternoon. .WED NIGHT...N winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .THU...N winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to 6 ft. A chance of showers. .THU NIGHT...N winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 ft. .FRI...N winds 25 to 30 kt. Seas 4 to 6 ft. .FRI NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Winds and seas higher in and near tstms. 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. $$ ANZ254-130900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 404 PM EDT Sun Oct 12 2025 ...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT... .TONIGHT...NE winds 25 to 35 kt, becoming E 30 to 35 kt after midnight. Gusts up to 45 kt. Seas 9 to 13 ft, building to 11 to 15 ft after midnight. Wave Detail: SE 11 ft at 12 seconds and NE 9 ft at 7 seconds, becoming SE 15 ft at 11 seconds and E 8 ft at 8 seconds. Rain. Vsby 1 to 3 NM. .MON...E winds 30 to 35 kt, diminishing to 25 to 30 kt in the afternoon. Gusts up to 45 kt. Seas 12 to 16 ft. Wave Detail: E 16 ft at 11 seconds and NE 3 ft at 6 seconds. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .MON NIGHT...E winds 25 to 30 kt with gusts up to 40 kt, diminishing to 20 to 25 kt with gusts up to 30 kt after midnight. Seas 12 to 16 ft, subsiding to 10 to 14 ft after midnight. Wave Detail: E 16 ft at 11 seconds and NE 3 ft at 5 seconds, becoming E 14 ft at 11 seconds and NE 3 ft at 5 seconds. Rain with a chance of tstms. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .TUE...NE winds around 20 kt with gusts up to 30 kt. Seas 9 to 12 ft, subsiding to 7 to 10 ft in the afternoon. Wave Detail: SE 12 ft at 11 seconds and NE 2 ft at 5 seconds, becoming E 10 ft at 11 seconds and NE 2 ft at 5 seconds. Rain in the morning, then showers in the afternoon. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .TUE NIGHT...NE winds 20 to 25 kt, becoming N 15 to 20 kt after midnight. Seas 6 to 9 ft. Wave Detail: E 9 ft at 10 seconds and N 3 ft at 5 seconds. Showers, mainly in the evening with vsby 1 to 3 NM. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds and N 3 ft at 5 seconds. A chance of showers. .WED NIGHT...N winds 25 to 30 kt. Seas 5 to 8 ft. A chance of showers in the evening, then showers likely after midnight. .THU...N winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to 9 ft. A chance of showers. .THU NIGHT AND FRI...N winds 25 to 35 kt with gusts up to 40 kt. Seas 7 to 10 ft. A chance of showers. .FRI NIGHT...N winds 20 to 25 kt. Seas 6 to 9 ft. Winds and seas higher in and near tstms. 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. $$ ANZ255-130900- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 404 PM EDT Sun Oct 12 2025 ...STORM WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...NE winds 35 to 40 kt with gusts up to 50 kt. Seas 12 to 16 ft. Wave Detail: SE 15 ft at 12 seconds and E 10 ft at 9 seconds. Rain. Vsby 1 NM or less. .MON...E winds 30 to 40 kt. Gusts up to 50 kt in the morning. Seas 12 to 16 ft. Wave Detail: E 15 ft at 12 seconds and E 9 ft at 9 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...E winds 25 to 30 kt, becoming NE 20 to 25 kt after midnight. Seas 10 to 14 ft. Wave Detail: E 13 ft at 11 seconds and NE 4 ft at 6 seconds. Rain with a chance of tstms. Vsby 1 NM or less. .TUE...NE winds 20 to 25 kt, increasing to 25 to 30 kt in the afternoon. Seas 8 to 11 ft, subsiding to 7 to 9 ft in the afternoon. Wave Detail: S 9 ft at 10 seconds and E 9 ft at 11 seconds, becoming E 9 ft at 10 seconds and N 5 ft at 5 seconds. Rain in the morning, then showers in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 25 to 30 kt, diminishing to 20 to 25 kt after midnight. Seas 6 to 9 ft. Wave Detail: E 8 ft at 10 seconds and N 6 ft at 6 seconds. Showers, mainly in the evening. .WED...N winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and N 4 ft at 5 seconds. A chance of showers in the afternoon. .WED NIGHT...N winds 25 to 30 kt. Seas 6 to 9 ft. A chance of showers. .THU AND THU NIGHT...N winds 25 to 30 kt, increasing to 30 to 35 kt. Seas 6 to 9 ft. A chance of showers. .FRI...N winds 25 to 35 kt. Seas 5 to 8 ft. .FRI NIGHT...NW winds 20 to 25 kt. Seas 4 to 6 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-130900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 404 PM EDT Sun Oct 12 2025 ...STORM WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...NE winds 35 to 45 kt with gusts up to 50 kt. Seas 12 to 17 ft, building to 14 to 18 ft after midnight. Wave Detail: SE 14 ft at 12 seconds and NE 11 ft at 7 seconds, becoming E 18 ft at 10 seconds and NE 5 ft at 7 seconds. Rain. Vsby 1 NM or less. .MON...E winds 30 to 40 kt with gusts up to 50 kt. Seas 13 to 18 ft. Wave Detail: E 18 ft at 11 seconds and NE 4 ft at 6 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...NE winds 25 to 30 kt with gusts up to 35 kt. Seas 12 to 16 ft. Wave Detail: E 15 ft at 12 seconds and NE 4 ft at 6 seconds. Rain. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .TUE...NE winds 25 to 30 kt. Seas 9 to 13 ft, subsiding to 8 to 11 ft in the afternoon. Wave Detail: E 11 ft at 11 seconds and N 6 ft at 5 seconds, becoming SE 8 ft at 10 seconds and E 8 ft at 11 seconds. Rain in the morning, then showers in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 25 to 30 kt, diminishing to 20 to 25 kt after midnight. Seas 7 to 10 ft. Wave Detail: E 8 ft at 10 seconds and N 6 ft at 6 seconds. Showers likely, mainly in the evening. .WED...N winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds and N 4 ft at 5 seconds. .WED NIGHT...N winds 25 to 30 kt. Seas 6 to 9 ft. .THU...N winds 25 to 30 kt. Seas 5 to 8 ft. .THU NIGHT...N winds 25 to 35 kt. Seas 6 to 9 ft. .FRI...N winds 25 to 30 kt with gusts up to 35 kt. Seas 4 to 6 ft. .FRI NIGHT...NW winds 15 to 20 kt. Seas 3 to 4 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. $$ ANZ232-130900- Nantucket Sound- 404 PM EDT Sun Oct 12 2025 ...STORM WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...NE winds 30 to 40 kt with gusts up to 50 kt. Seas 7 to 10 ft. Wave Detail: E 8 ft at 6 seconds and E 6 ft at 9 seconds. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .MON...E winds 30 to 40 kt with gusts up to 45 kt. Seas 7 to 10 ft. Wave Detail: E 7 ft at 6 seconds and E 7 ft at 9 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...E winds 25 to 30 kt. Gusts up to 40 kt in the evening. Seas 6 to 9 ft. Wave Detail: E 6 ft at 6 seconds and E 6 ft at 11 seconds. Rain with a chance of tstms. Vsby 1 NM or less. .TUE...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: NE 5 ft at 4 seconds and E 5 ft at 11 seconds. Rain in the morning, then showers in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: N 4 ft at 5 seconds and E 3 ft at 10 seconds. Showers, mainly in the evening. .WED...N winds around 15 kt, increasing to 20 to 25 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 3 ft at 4 seconds and E 3 ft at 10 seconds. A chance of showers in the afternoon. .WED NIGHT...N winds 25 to 30 kt. Seas 4 to 6 ft. A chance of showers. .THU...N winds 25 to 30 kt with gusts up to 35 kt. Seas 3 to 5 ft. A chance of showers. .THU NIGHT...N winds 25 to 35 kt with gusts up to 40 kt. Seas 4 to 6 ft. A chance of showers. .FRI...N winds 25 to 30 kt with gusts up to 35 kt. Seas 4 to 6 ft. .FRI NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-130900- Vineyard Sound- 404 PM EDT Sun Oct 12 2025 ...GALE WARNING IN EFFECT THROUGH MONDAY EVENING... .TONIGHT...NE winds 30 to 35 kt with gusts up to 45 kt. Seas 6 to 9 ft. Wave Detail: E 6 ft at 9 seconds and NE 5 ft at 5 seconds. Rain. Vsby 1 to 3 NM. .MON...NE winds 30 to 35 kt, becoming E 25 to 30 kt in the afternoon. Gusts up to 45 kt. Seas 6 to 9 ft. Wave Detail: NE 5 ft at 5 seconds and SE 5 ft at 12 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...NE winds 25 to 30 kt, diminishing to 20 to 25 kt after midnight. Seas 5 to 8 ft. Wave Detail: SE 5 ft at 11 seconds and NE 4 ft at 5 seconds. Rain. A chance of tstms in the evening. Vsby 1 NM or less. .TUE...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 4 ft at 11 seconds and N 3 ft at 5 seconds. Rain in the morning, then showers in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 5 ft. Wave Detail: N 3 ft at 5 seconds and SE 3 ft at 9 seconds. Showers likely, mainly in the evening. .WED AND WED NIGHT...N winds 20 to 25 kt. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 9 seconds. .THU THROUGH FRI...N winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Winds and seas higher in and near tstms. 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. $$ ANZ234-130900- Buzzards Bay- 404 PM EDT Sun Oct 12 2025 ...GALE WARNING IN EFFECT THROUGH MONDAY EVENING... .TONIGHT...NE winds 25 to 30 kt, increasing to 30 to 35 kt after midnight. Gusts up to 45 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 9 seconds and SE 6 ft at 12 seconds. Rain. Vsby 1 to 3 NM. .MON...NE winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 9 seconds and SE 6 ft at 12 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...NE winds 25 to 30 kt, diminishing to 20 to 25 kt after midnight. Seas 4 to 6 ft. Wave Detail: NE 5 ft at 5 seconds and SE 5 ft at 11 seconds. Rain. Vsby 1 to 3 NM. .TUE...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and N 3 ft at 5 seconds. Rain in the morning, then showers in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and SE 3 ft at 9 seconds. Showers likely, mainly in the evening. .WED AND WED NIGHT...N winds 20 to 25 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 9 seconds. .THU THROUGH FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-130900- Rhode Island Sound- 404 PM EDT Sun Oct 12 2025 ...STORM WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...NE winds 30 to 40 kt with gusts up to 50 kt. Seas 8 to 11 ft, building to 9 to 13 ft after midnight. Wave Detail: SE 11 ft at 12 seconds and E 9 ft at 9 seconds, becoming SE 12 ft at 12 seconds and NE 7 ft at 6 seconds. Rain. Vsby 1 NM or less. .MON...NE winds 30 to 35 kt with gusts up to 50 kt, diminishing to 25 to 30 kt with gusts up to 40 kt in the afternoon. Seas 9 to 13 ft. Wave Detail: SE 13 ft at 12 seconds and NE 7 ft at 6 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...NE winds 25 to 30 kt, diminishing to 20 to 25 kt after midnight. Seas 8 to 11 ft. Wave Detail: SE 11 ft at 12 seconds and NE 6 ft at 6 seconds. Rain. Vsby 1 to 3 NM. .TUE...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. Wave Detail: SE 7 ft at 11 seconds and SE 6 ft at 10 seconds. Rain in the morning, then showers likely in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 20 to 25 kt with gusts up to 30 kt, diminishing to 15 to 20 kt after midnight. Seas 5 to 7 ft. Wave Detail: N 5 ft at 5 seconds and SE 5 ft at 10 seconds. Showers likely, mainly in the evening. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 10 seconds and N 3 ft at 4 seconds. .WED NIGHT...N winds 20 to 25 kt. Seas 4 to 6 ft. .THU AND THU NIGHT...N winds 20 to 25 kt, increasing to 25 to 30 kt. Seas 3 to 5 ft. .FRI AND FRI NIGHT...N winds 20 to 25 kt, becoming NW around 15 kt. Seas 2 to 4 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. $$ ANZ237-130900- Block Island Sound- 404 PM EDT Sun Oct 12 2025 ...STORM WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...NE winds 30 to 40 kt with gusts up to 50 kt. Seas 9 to 12 ft, building to 10 to 14 ft after midnight. Wave Detail: SE 12 ft at 12 seconds and E 9 ft at 9 seconds, becoming SE 13 ft at 12 seconds and E 7 ft at 9 seconds. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .MON...NE winds 30 to 35 kt with gusts up to 50 kt, diminishing to 25 to 30 kt with gusts up to 40 kt in the afternoon. Seas 10 to 14 ft. Wave Detail: E 14 ft at 11 seconds and NE 6 ft at 6 seconds. Rain. Vsby 1 NM or less. .MON NIGHT...NE winds 25 to 30 kt with gusts up to 35 kt. Seas 9 to 12 ft. Wave Detail: SE 12 ft at 12 seconds and NE 4 ft at 6 seconds. Rain. Vsby 1 to 3 NM. .TUE...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 10 ft, subsiding to 5 to 8 ft in the afternoon. Wave Detail: SE 8 ft at 11 seconds and NE 4 ft at 5 seconds, becoming E 7 ft at 11 seconds and SE 5 ft at 10 seconds. Rain in the morning, then showers likely in the afternoon. Vsby 1 to 3 NM in the morning. .TUE NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: SE 6 ft at 10 seconds and N 4 ft at 5 seconds. Showers likely, mainly in the evening. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 10 seconds and N 3 ft at 4 seconds. .WED NIGHT...N winds 20 to 25 kt. Seas 4 to 6 ft. .THU AND THU NIGHT...N winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. .FRI AND FRI NIGHT...N winds 20 to 25 kt, becoming NW 10 to 15 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-130900- Boston Harbor- 404 PM EDT Sun Oct 12 2025 ...GALE WARNING IN EFFECT THROUGH MONDAY EVENING... .TONIGHT...NE winds 25 to 30 kt with gusts up to 35 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. Rain. Vsby 1 to 3 NM. .MON...NE winds 25 to 30 kt with gusts up to 40 kt. Waves 2 to 3 ft, except 5 to 7 ft at the outer harbor entrance. Rain. Vsby 1 NM or less. .MON NIGHT...NE winds 25 to 30 kt, diminishing to 20 to 25 kt after midnight. Waves 2 to 3 ft, except 5 to 7 ft at the outer harbor entrance. Rain. Vsby 1 to 3 NM. .TUE...NE winds 20 to 25 kt, becoming N 15 to 20 kt in the afternoon. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. Rain in the morning, then showers likely in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less. At the outer harbor entrance, waves 3 to 5 ft. A chance of showers. .WED AND WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. .THU THROUGH FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Waves around 2 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. $$ ANZ236-130900- Narragansett Bay- 404 PM EDT Sun Oct 12 2025 ...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...NE winds 25 to 30 kt with gusts up to 40 kt. Waves around 3 ft, except 5 to 7 ft at the bay entrance. Rain. Vsby 1 to 3 NM. .MON...NE winds 25 to 30 kt with gusts up to 40 kt. Waves around 3 ft, except 5 to 7 ft at the bay entrance. Rain. Vsby 1 NM or less. .MON NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Waves around 3 ft, except 5 to 7 ft at the bay entrance. Rain. Vsby 1 to 3 NM. .TUE...N winds 15 to 20 kt with gusts up to 30 kt. Waves around 3 ft, except 4 to 6 ft at the bay entrance. Rain in the morning, then showers likely in the afternoon. Vsby 1 to 3 NM. .TUE NIGHT...N winds 15 to 20 kt with gusts up to 25 kt, diminishing to around 10 kt after midnight. Waves 2 to 3 ft. A chance of showers. .WED AND WED NIGHT...N winds 15 to 20 kt. Waves 2 to 3 ft. .THU THROUGH FRI NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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