Coastal Waters Forecast
Issued by NWS Boston, MA

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562 FZUS51 KBOX 272303 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 703 PM EDT Thu Jun 27 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-281200- 703 PM EDT Thu Jun 27 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... A cold front crosses the waters today into tonight. High pres builds over the waters Fri, then moves offshore Sat. Another cold front should cross the waters sometime late Sun into Sun night. This will be followed by a ridge of high pressure early next week. $$ ANZ250-281200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 703 PM EDT Thu Jun 27 2024 .TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at 8 seconds. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at 9 seconds. .FRI NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. .SAT...S winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and S 2 ft at 3 seconds. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: S 4 ft at 5 seconds. A chance of showers in the evening, then showers after midnight. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SE 4 ft at 7 seconds and SW 3 ft at 4 seconds. Showers with a chance of tstms. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 4 ft. Showers likely, mainly in the evening. .MON THROUGH TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-281200- Massachusetts Bay and Ipswich Bay- 703 PM EDT Thu Jun 27 2024 .TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 foot at 9 seconds. .FRI...NW winds 10 to 15 kt, becoming SE 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and E 2 ft at 8 seconds. .FRI NIGHT...S winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 1 foot at 3 seconds and E 1 foot at 7 seconds. .SAT...S winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and S 2 ft at 3 seconds. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 5 seconds. A chance of showers in the evening. Showers after midnight. .SUN...SW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 5 seconds. Showers with a chance of tstms. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas around 2 ft. Showers likely in the evening. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 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. $$ ANZ231-281200- Cape Cod Bay- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds 10 to 15 kt, becoming N after midnight. Gusts up to 25 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and SE 2 ft at 8 seconds. .FRI...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and NE 1 foot at 7 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: N 1 foot at 5 seconds, becoming SW 1 foot at 2 seconds and NE 1 foot at 5 seconds. .SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: S 1 foot at 2 seconds and NE 1 foot at 4 seconds, becoming SE 2 ft at 4 seconds. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 6 seconds and S 2 ft at 3 seconds. Showers after midnight. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds and SW 2 ft at 3 seconds. Showers. A chance of tstms in the afternoon. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 3 ft. Showers likely in the evening. A chance of showers after midnight. .MON THROUGH TUE NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-281200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds 10 to 15 kt, becoming N after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and NW 3 ft at 4 seconds. .FRI...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 4 seconds and SE 3 ft at 7 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SE 2 ft at 8 seconds. .SAT...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 4 seconds. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 5 seconds. A chance of showers after midnight. .SUN AND SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds. Showers. A chance of tstms through the night, then a chance of showers after midnight. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .MON NIGHT THROUGH TUE NIGHT...NW winds 5 to 10 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. $$ ANZ255-281200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds 10 to 15 kt, becoming N 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds and NW 3 ft at 4 seconds. .FRI...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and SE 3 ft at 7 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at 3 seconds. .SAT...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and S 2 ft at 3 seconds. .SAT NIGHT...S winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 3 to 5 ft. Wave Detail: S 5 ft at 5 seconds. A chance of showers after midnight. .SUN...SW winds 20 to 25 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 5 seconds. Showers. .SUN NIGHT...SW winds 15 to 20 kt, becoming W after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Showers likely. A chance of tstms in the evening. .MON...N winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .MON NIGHT THROUGH TUE NIGHT...NW winds 10 to 15 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-281200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds 10 to 15 kt, becoming N after midnight. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds and NW 2 ft at 3 seconds. .FRI...N winds 10 to 15 kt with gusts up to 20 kt, becoming SE 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and NW 2 ft at 3 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 2 seconds. .SAT...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 6 seconds and S 2 ft at 3 seconds. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 6 seconds. Showers after midnight. .SUN AND SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 7 seconds and SW 1 foot at 4 seconds. Showers. A chance of tstms through the night, then a chance of showers after midnight. .MON...N winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. .MON NIGHT THROUGH TUE NIGHT...W winds 5 to 10 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. $$ ANZ232-281200- Nantucket Sound- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds 10 to 15 kt, becoming N 15 to 20 kt after midnight. Gusts up to 25 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and S 2 ft at 7 seconds. .FRI...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and SE 1 foot at 7 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 1 foot at 3 seconds and SE 1 foot at 6 seconds. .SAT...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 8 seconds. .SAT NIGHT AND SUN...SW winds 20 to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 5 seconds. Showers. .SUN NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and S 2 ft at 7 seconds. Showers likely in the evening. A chance of showers after midnight. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON NIGHT THROUGH TUE NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-281200- Vineyard Sound- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds around 10 kt, becoming N after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at 4 seconds. .FRI...N winds 10 to 15 kt, becoming S 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and E 1 foot at 6 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 6 seconds. .SAT...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and S 1 foot at 3 seconds. .SAT NIGHT AND SUN...SW winds 20 to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 5 seconds. Showers. .SUN NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, becoming NW 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SW 2 ft at 4 seconds. Showers likely in the evening. A chance of showers after midnight. .MON...N winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .MON NIGHT THROUGH TUE NIGHT...W winds 5 to 10 kt. Seas 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. $$ ANZ234-281200- Buzzards Bay- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds around 10 kt, becoming N after midnight. Gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and W 1 foot at 3 seconds. .FRI...N winds 10 to 15 kt, becoming S 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 6 seconds. .SAT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and S 2 ft at 6 seconds. .SAT NIGHT AND SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 5 seconds. A chance of showers in the evening, then showers. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and SW 2 ft at 4 seconds. Showers likely in the evening. A chance of showers after midnight. .MON THROUGH TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-281200- Rhode Island Sound- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds 10 to 15 kt, becoming N after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and NW 2 ft at 3 seconds. .FRI...N winds 10 to 15 kt, becoming S 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and N 2 ft at 3 seconds. .FRI NIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 2 seconds. .SAT...S 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. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 6 seconds and S 1 foot at 3 seconds. A chance of showers in the evening, then showers after midnight. .SUN AND SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SW 1 foot at 4 seconds. Showers with a chance of tstms, then a chance of showers after midnight. .MON THROUGH TUE...NE winds 10 to 15 kt. Seas 2 to 4 ft. .TUE NIGHT...SW winds 5 to 10 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. $$ ANZ237-281200- Block Island Sound- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds around 10 kt, becoming N after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 6 seconds and NW 1 foot at 3 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 2 seconds. .SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 6 seconds and S 1 foot at 3 seconds. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 6 seconds and S 1 foot at 3 seconds. A chance of showers in the evening, then showers after midnight. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SW 2 ft at 4 seconds. Showers with a chance of tstms. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas 3 to 5 ft. Showers likely in the evening. A chance of showers after midnight. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-281200- Boston Harbor- 703 PM EDT Thu Jun 27 2024 .TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Waves 1 foot or less. .FRI...NW winds 5 to 10 kt, becoming SE in the afternoon. Waves 1 foot or less. .FRI NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. Showers. .SUN AND SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. Showers with a chance of tstms. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. Winds and waves 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. $$ ANZ236-281200- Narragansett Bay- 703 PM EDT Thu Jun 27 2024 .TONIGHT...W winds around 10 kt, becoming N after midnight. Waves around 2 ft. .FRI...N winds 5 to 10 kt, becoming S in the afternoon. Waves around 2 ft. .FRI NIGHT...S winds 5 to 10 kt. Waves around 2 ft. .SAT...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 4 ft. A chance of showers in the evening, then showers after midnight. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Waves 3 to 5 ft. Showers with a chance of tstms. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Waves 2 to 4 ft. Showers likely, mainly in the evening. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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