Coastal Waters Forecast
Issued by NWS Boston, MA

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215 FZUS51 KBOX 302004 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 404 PM EDT Thu May 30 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-310900- 404 PM EDT Thu May 30 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres builds in from the west Fri into the weekend, bringing mainly dry pleasant boating weather to the region. This high pres system will remain in control of our weather for the first half of next week. $$ ANZ250-310900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 404 PM EDT Thu May 30 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...N winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and SE 2 ft at 8 seconds. A slight chance of showers this evening. .FRI...N winds around 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 7 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 2 seconds. .SAT...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 4 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: S 1 foot at 3 seconds and NE 1 foot at 3 seconds. .SUN AND SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 3 seconds and SW 1 foot at 3 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-310900- Massachusetts Bay and Ipswich Bay- 404 PM EDT Thu May 30 2024 .TONIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at 8 seconds. .FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and N 1 foot at 4 seconds. .FRI NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: S 1 foot at 2 seconds and NE 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and E 1 foot at 7 seconds. .SAT NIGHT...S winds around 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and E 1 foot at 8 seconds. .SUN AND SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 3 seconds. .MON THROUGH TUE NIGHT...S 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. $$ ANZ231-310900- Cape Cod Bay- 404 PM EDT Thu May 30 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...N winds 10 to 15 kt with gusts up to 25 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds and SE 1 foot at 7 seconds. A slight chance of showers this evening. .FRI...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 7 seconds. .FRI NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: NW 1 foot at 4 seconds and SE 1 foot at 7 seconds. .SAT...N winds around 5 kt, becoming NE in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 7 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 3 seconds. .SUN AND SUN NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 3 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-310900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 404 PM EDT Thu May 30 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...N winds 10 to 15 kt. Gusts up to 25 kt this evening. Seas 3 to 5 ft. Wave Detail: SE 3 ft at 7 seconds and N 2 ft at 4 seconds. A slight chance of showers this evening. .FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 5 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 3 seconds. .SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 4 seconds. .SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. .MON THROUGH TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and W 2 ft at 4 seconds. 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. $$ ANZ255-310900- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 404 PM EDT Thu May 30 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...N winds 10 to 15 kt. Gusts up to 25 kt this evening. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and N 2 ft at 4 seconds. .FRI...NW winds around 10 kt, becoming NE in the afternoon. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 7 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 7 seconds. .SAT...N winds 5 to 10 kt, becoming NW in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 4 seconds. .SAT NIGHT THROUGH SUN NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and NE 1 foot at 4 seconds. .MON THROUGH TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and E 2 ft at 3 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-310900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 404 PM EDT Thu May 30 2024 .TONIGHT...N winds 10 to 15 kt with gusts up to 25 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and N 2 ft at 4 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 3 seconds. .SAT...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 3 seconds. .SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 7 seconds. .MON THROUGH TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and E 2 ft at 3 seconds. 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. $$ ANZ232-310900- Nantucket Sound- 404 PM EDT Thu May 30 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...N winds 10 to 15 kt. Gusts up to 25 kt this evening. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and SE 1 foot at 7 seconds. A slight chance of showers this evening. .FRI...N winds around 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 7 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 7 seconds. .SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 3 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and W 1 foot at 4 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-310900- Vineyard Sound- 404 PM EDT Thu May 30 2024 .TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. .FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt, becoming SW in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds. .SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 4 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and SW 1 foot at 5 seconds. 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. $$ ANZ234-310900- Buzzards Bay- 404 PM EDT Thu May 30 2024 .TONIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. .FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds, becoming W 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds. .SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 3 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and SW 1 foot at 5 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-310900- Rhode Island Sound- 404 PM EDT Thu May 30 2024 .TONIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and N 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 3 seconds. .FRI NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 3 seconds. .SAT...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: S 2 ft at 7 seconds and NW 1 foot at 3 seconds, becoming SW 1 foot at 4 seconds and SE 1 foot at 7 seconds. .SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 7 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 9 seconds. 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. $$ ANZ237-310900- Block Island Sound- 404 PM EDT Thu May 30 2024 .TONIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 2 seconds. .SAT...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds, becoming SW 1 foot at 3 seconds and SE 1 foot at 7 seconds. .SAT NIGHT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 7 seconds. .MON THROUGH TUE NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 9 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-310900- Boston Harbor- 404 PM EDT Thu May 30 2024 .TONIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Waves 1 foot or less. .FRI NIGHT...SW winds around 5 kt, becoming NW after midnight. Waves 1 foot or less. .SAT...N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Waves 1 foot or less. .SUN AND SUN NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Waves 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. $$ ANZ236-310900- Narragansett Bay- 404 PM EDT Thu May 30 2024 .TONIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Waves around 2 ft. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. .SAT...N winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. .SAT NIGHT THROUGH SUN NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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