Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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603 FZUS51 KBOX 062005 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 404 PM EDT Sun Sep 6 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-070900- 404 PM EDT Sun Sep 6 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... Low pressure lingers offshore today but high pres moves towards the waters for the start of next week. This continues, with tranquil weather, through at least mid week before another low pressure approaches on Thursday. $$ ANZ250-070900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 404 PM EDT Sun Sep 6 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: NE 4 ft at 8 seconds and NW 1 foot at 4 seconds. Isolated showers this evening. .MON...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and NE 2 ft at 7 seconds. .MON NIGHT...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and E 1 foot at 9 seconds. .TUE...W winds 10 to 15 kt, becoming NW 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 6 seconds. .TUE NIGHT...S winds around 5 kt, becoming E after midnight. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and N 1 foot at 3 seconds. .WED...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 3 seconds and E 1 foot at 9 seconds. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. A chance of showers after midnight. .THU...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-070900- Massachusetts Bay and Ipswich Bay- 404 PM EDT Sun Sep 6 2026 .TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 7 seconds and N 1 foot at 4 seconds. Isolated showers this evening. .MON...NW winds around 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 7 seconds and NE 2 ft at 10 seconds. .MON NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 1 foot at 2 seconds and NE 1 foot at 6 seconds. .TUE...W winds 5 to 10 kt, becoming N in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and NE 1 foot at 5 seconds, becoming N 1 foot at 3 seconds and S 1 foot at 9 seconds. .TUE NIGHT...S winds around 5 kt, becoming NE after midnight. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 3 seconds. .WED...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon. Wave Detail: S 1 foot at 2 seconds and E 1 foot at 3 seconds, becoming SE 2 ft at 3 seconds and E 1 foot at 9 seconds. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers after midnight. .THU...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ231-070900- Cape Cod Bay- 404 PM EDT Sun Sep 6 2026 .TONIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: NE 2 ft at 7 seconds and N 1 foot at 4 seconds. Isolated showers this evening. .MON...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 7 seconds and NW 1 foot at 3 seconds. .MON NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 5 seconds, becoming N 1 foot at 4 seconds and E 1 foot at 9 seconds. .TUE...W winds 5 to 10 kt, becoming N in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 5 seconds. .TUE NIGHT AND WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and N 1 foot at 4 seconds. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SE 3 ft at 4 seconds and SW 3 ft at 4 seconds. A chance of showers after midnight. .THU...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt. Seas around 2 ft, then 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-070900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 404 PM EDT Sun Sep 6 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 7 seconds and NW 1 foot at 3 seconds. Isolated showers this evening. .MON...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: NE 4 ft at 9 seconds and NE 3 ft at 6 seconds. .MON NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 6 seconds and E 2 ft at 9 seconds. .TUE...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and NE 1 foot at 5 seconds. .TUE NIGHT AND WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and N 1 foot at 4 seconds. .WED NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: SW 4 ft at 5 seconds and NE 1 foot at 4 seconds, becoming SW 6 ft at 6 seconds and E 1 foot at 4 seconds. .THU...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .FRI NIGHT...N winds 5 to 10 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. $$ ANZ255-070900- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 404 PM EDT Sun Sep 6 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 3 ft at 8 seconds and N 2 ft at 4 seconds. .MON...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 3 ft at 9 seconds. .MON NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and E 2 ft at 9 seconds. .TUE...W winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and NE 1 foot at 5 seconds. .TUE NIGHT AND WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and NE 1 foot at 5 seconds. .WED NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft, building to 5 to 7 ft after midnight. Wave Detail: SW 5 ft at 5 seconds and NE 1 foot at 4 seconds, becoming SW 7 ft at 7 seconds and E 1 foot at 5 seconds. .THU...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. A chance of showers. .FRI...NW winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers. .FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-070900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 404 PM EDT Sun Sep 6 2026 .TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and E 2 ft at 8 seconds. .MON...NW winds 10 to 15 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and E 2 ft at 9 seconds. .MON NIGHT...W winds around 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and N 1 foot at 3 seconds. .TUE...W winds around 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 4 seconds. .TUE NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 2 ft at 6 seconds. .WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and NE 1 foot at 4 seconds. .WED NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft, building to 6 to 9 ft after midnight. .THU...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. A chance of showers. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...NW winds 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. $$ ANZ232-070900- Nantucket Sound- 404 PM EDT Sun Sep 6 2026 .TONIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and E 2 ft at 8 seconds. Isolated showers this evening. .MON...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and NE 2 ft at 5 seconds. .MON NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 5 seconds. .TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 4 seconds and NE 1 foot at 5 seconds. .TUE NIGHT AND WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and NE 1 foot at 4 seconds. .WED NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds and E 1 foot at 4 seconds. .THU...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt, becoming N 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-070900- Vineyard Sound- 404 PM EDT Sun Sep 6 2026 .TONIGHT...NW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds, becoming W 1 foot at 2 seconds and NE 1 foot at 4 seconds. Isolated showers this evening. .MON...NW winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 5 seconds, becoming N 1 foot at 4 seconds and SE 1 foot at 9 seconds. .MON NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .TUE...W winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 4 seconds and W 1 foot at 4 seconds. .TUE NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SW 1 foot at 5 seconds. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon. Wave Detail: NE 1 foot at 4 seconds and SW 1 foot at 5 seconds, becoming S 3 ft at 4 seconds and SE 1 foot at 9 seconds. .WED NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft, building to 5 to 7 ft after midnight. .THU...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 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. $$ ANZ234-070900- Buzzards Bay- 404 PM EDT Sun Sep 6 2026 .TONIGHT...W winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds, becoming NW 1 foot at 2 seconds and NE 1 foot at 4 seconds. Isolated showers this evening. .MON...NW winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds, becoming NW 1 foot at 3 seconds and S 1 foot at 5 seconds. .MON NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 5 seconds. .TUE...W winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 4 seconds. .TUE NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SW 1 foot at 5 seconds. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 4 ft in the afternoon. Wave Detail: NE 1 foot at 4 seconds and SW 1 foot at 5 seconds, becoming S 3 ft at 4 seconds and SE 1 foot at 9 seconds. .WED NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. .THU...SW winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 5 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-070900- Rhode Island Sound- 404 PM EDT Sun Sep 6 2026 .TONIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and NE 1 foot at 3 seconds. Isolated showers this evening. .MON...NW winds around 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at 5 seconds. .MON NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: NE 1 foot at 3 seconds and W 1 foot at 3 seconds. .TUE...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SW 2 ft at 7 seconds. .TUE NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and N 2 ft at 6 seconds. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds. .WED NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. .THU...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .FRI...NW winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...NW winds 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. $$ ANZ237-070900- Block Island Sound- 404 PM EDT Sun Sep 6 2026 .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: NW 1 foot at 4 seconds and E 1 foot at 4 seconds. Isolated showers this evening. .MON...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 6 seconds. .MON NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 2 seconds. .TUE...W winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: W 1 foot at 3 seconds and S 1 foot at 6 seconds, becoming SW 1 foot at 4 seconds and SE 1 foot at 9 seconds. .TUE NIGHT...W winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: N 2 ft at 6 seconds and SW 1 foot at 4 seconds, becoming N 1 foot at 4 seconds and SW 1 foot at 4 seconds. .WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon. Wave Detail: NE 1 foot at 4 seconds and S 1 foot at 4 seconds, becoming S 3 ft at 4 seconds and SE 1 foot at 9 seconds. .WED NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft, building to 5 to 7 ft after midnight. .THU...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-070900- Boston Harbor- 404 PM EDT Sun Sep 6 2026 .TONIGHT...W winds 5 to 10 kt. Waves 1 foot or less. Isolated showers this evening. .MON...NW winds around 10 kt, diminishing to around 5 kt in the afternoon. Waves 1 foot or less. .MON NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .TUE...W winds 5 to 10 kt, becoming N in the afternoon. Waves 1 foot or less. .TUE NIGHT...S winds around 5 kt, becoming NE after midnight. Waves 1 foot or less. .WED...SE winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .WED NIGHT...SW winds 15 to 20 kt. Waves around 2 ft. A chance of showers after midnight. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ236-070900- Narragansett Bay- 404 PM EDT Sun Sep 6 2026 .TONIGHT...W winds 5 to 10 kt. Waves 1 foot or less. Isolated showers this evening. .MON...NW winds 5 to 10 kt. Waves 1 foot or less. .MON NIGHT...NW winds around 5 kt. Waves 1 foot or less. .TUE...W winds 5 to 10 kt. Waves 1 foot or less. .TUE NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then 2 to 3 ft in the afternoon. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves 3 to 5 ft. .THU...SW winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to 4 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-070900- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 404 PM EDT Sun Sep 6 2026 .TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 8 seconds and NW 2 ft at 4 seconds. Isolated showers this evening. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 10 seconds. .MON NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and E 1 foot at 9 seconds. .TUE...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 2 seconds. .TUE NIGHT...SW winds around 5 kt, becoming NE after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and N 1 foot at 4 seconds. .WED...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds. .WED NIGHT...S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 4 to 6 ft. A chance of showers after midnight. .THU...SW winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to 6 ft. A chance of showers. .THU NIGHT AND FRI...W winds 15 to 20 kt, becoming NW 10 to 15 kt. Gusts up to 25 kt. Seas 3 to 5 ft. .FRI NIGHT...NW winds 5 to 10 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. $$ ANZ281-070900- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 404 PM EDT Sun Sep 6 2026 .TONIGHT...NW winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 4 to 5 ft. Wave Detail: NE 5 ft at 8 seconds and NW 2 ft at 4 seconds. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 9 seconds and N 3 ft at 6 seconds. .MON NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and E 2 ft at 9 seconds. .TUE...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and E 2 ft at 9 seconds. .TUE NIGHT AND WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 2 ft at 5 seconds. .WED NIGHT...S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 2 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: SW 4 ft at 4 seconds and NE 1 foot at 4 seconds, becoming SW 6 ft at 6 seconds and E 1 foot at 4 seconds. .THU...SW winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 7 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. A chance of showers. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-070900- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 404 PM EDT Sun Sep 6 2026 .TONIGHT...N winds 5 to 10 kt, becoming W after midnight. Seas 4 to 5 ft. Wave Detail: NE 5 ft at 8 seconds and N 3 ft at 5 seconds. .MON...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 8 seconds and NW 2 ft at 4 seconds. .MON NIGHT...W winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas around 3 ft. Wave Detail: NE 3 ft at 9 seconds and W 2 ft at 4 seconds. .TUE...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and NE 2 ft at 9 seconds. .TUE NIGHT AND WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 2 ft at 9 seconds. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft, building to 5 to 7 ft after midnight. Wave Detail: SW 4 ft at 5 seconds and NE 1 foot at 4 seconds, becoming W 7 ft at 6 seconds and SE 1 foot at 9 seconds. .THU...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 8 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 9 ft. A chance of showers. .FRI...NW winds 10 to 15 kt. Seas 5 to 7 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 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. $$ ANZ283-070900- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 404 PM EDT Sun Sep 6 2026 .TONIGHT...N winds 5 to 10 kt, becoming NW 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 8 seconds and N 2 ft at 4 seconds. .MON...NW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 3 ft at 9 seconds. .MON NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and E 2 ft at 9 seconds. .TUE...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 2 ft at 9 seconds. .TUE NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and NE 1 foot at 5 seconds. .WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and NE 1 foot at 4 seconds. .WED NIGHT...SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 4 to 6 ft, building to 5 to 8 ft after midnight. .THU...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 9 ft. .THU NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 9 ft. A chance of showers. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .FRI NIGHT...NW winds 5 to 10 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston