Coastal Waters Forecast
Issued by NWS Boston, MA

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084 FZUS51 KBOX 301405 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1004 AM EDT Thu May 30 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-310300- 1004 AM EDT Thu May 30 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... A wave of low pres tracks across the waters this afternoon bringing N to NE winds. High pres then builds in from the west Fri into the weekend, bringing dry pleasant boating weather to the region. This high pres ridge will shift east of the region early next week. $$ ANZ250-310300- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1004 AM EDT Thu May 30 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .THIS AFTERNOON...NE winds 15 to 20 kt, diminishing to 10 to 15 kt. Seas 2 to 4 ft, building to 4 to 5 ft. Wave Detail: NE 3 ft at 3 seconds and SE 3 ft at 8 seconds, becoming NE 3 ft at 4 seconds and SE 2 ft at 8 seconds. Showers. A slight chance of tstms. Vsby 1 to 3 NM. .TONIGHT...N winds 5 to 10 kt. Seas 3 to 5 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: NE 2 ft at 4 seconds and SE 2 ft at 8 seconds, becoming SE 2 ft at 7 seconds and E 2 ft at 7 seconds. A chance of showers in the evening. .FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 7 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. .SAT...N winds around 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 4 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: S 1 foot at 2 seconds and NE 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-310300- Massachusetts Bay and Ipswich Bay- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...N winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 2 ft at 8 seconds. Showers with a slight chance of tstms, then a chance of showers. Vsby 1 to 3 NM. .TONIGHT...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: NE 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 5 to 10 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 4 seconds and E 1 foot at 7 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: SE 1 foot at 3 seconds and E 1 foot at 7 seconds. .SUN THROUGH MON 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. $$ ANZ231-310300- Cape Cod Bay- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 8 seconds. A chance of showers. Isolated tstms. Vsby 1 to 3 NM. .TONIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 7 seconds. A chance of showers in the evening. .FRI...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 4 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and E 1 foot at 7 seconds. .SAT...N winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 7 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-310300- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1004 AM EDT Thu May 30 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .THIS AFTERNOON...NE winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft, building to 3 to 5 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 7 seconds, becoming S 2 ft at 7 seconds and SE 2 ft at 8 seconds. A chance of showers. Vsby 1 to 3 NM. .TONIGHT...N winds around 10 kt. Seas 3 to 5 ft. Wave Detail: N 2 ft at 4 seconds and S 2 ft at 7 seconds. .FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 7 seconds. .FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 4 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...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SUN THROUGH MON NIGHT...W 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. $$ ANZ255-310300- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...W winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 2 ft at 7 seconds and SE 2 ft at 8 seconds. A slight chance of showers. .TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: N 2 ft at 3 seconds and E 2 ft at 7 seconds. Patchy fog. Vsby 1 to 3 NM after midnight. .FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 3 seconds. .FRI NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. .SAT...N winds around 10 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 4 seconds. .SAT NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and NE 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...W winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-310300- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...NW winds around 10 kt, becoming N 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: N 2 ft at 4 seconds and S 2 ft at 7 seconds. A slight chance of showers. .TONIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 2 ft at 4 seconds and S 2 ft at 7 seconds. .FRI...N winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and SE 2 ft at 8 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 3 seconds. .SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and NW 1 foot at 3 seconds. .SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW 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. $$ ANZ232-310300- Nantucket Sound- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 3 seconds. A chance of showers. .TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. .FRI...N winds around 10 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and SE 1 foot at 7 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 4 seconds, becoming W 1 foot at 3 seconds and E 1 foot at 7 seconds. .SAT...N winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 7 seconds. .SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. Wave Detail: E 1 foot at 3 seconds and SW 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...W winds around 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-310300- Vineyard Sound- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and N 1 foot at 3 seconds. A chance of showers. .TONIGHT...N 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: N 1 foot at 3 seconds and S 1 foot at 7 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. 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 E 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...SW winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. Wave Detail: E 1 foot at 3 seconds and S 1 foot at 5 seconds. .SUN THROUGH MON NIGHT...SW 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. $$ ANZ234-310300- Buzzards Bay- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and N 1 foot at 3 seconds. A chance of showers. Vsby 1 to 3 NM. .TONIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 4 seconds, becoming W 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SAT...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 7 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 foot at 3 seconds and S 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-310300- Rhode Island Sound- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...N winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and S 2 ft at 7 seconds. A chance of showers this morning. .TONIGHT...N 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: N 2 ft at 3 seconds and S 2 ft at 7 seconds. .FRI...N winds 5 to 10 kt, becoming S 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 NE 1 foot at 2 seconds. .SAT...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. .SAT NIGHT...SW winds around 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 3 seconds and E 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW 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. $$ ANZ237-310300- Block Island Sound- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...N winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and S 2 ft at 7 seconds. A chance of showers this morning. .TONIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SE 2 ft at 8 seconds. .FRI...N winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and N 1 foot at 3 seconds. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 2 seconds. .SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot at 7 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: E 1 foot at 2 seconds and S 1 foot at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-310300- Boston Harbor- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...N winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Showers with a slight chance of tstms, then showers likely. Vsby 1 to 3 NM. .TONIGHT...N winds 5 to 10 kt. Waves 1 foot or less. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .SAT...N winds 5 to 10 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 THROUGH MON 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. $$ ANZ236-310300- Narragansett Bay- 1004 AM EDT Thu May 30 2024 .THIS AFTERNOON...N winds 10 to 15 kt. Gusts up to 20 kt. Waves around 2 ft. A chance of showers. Vsby 1 to 3 NM. .TONIGHT...N winds 5 to 10 kt. Waves around 2 ft. .FRI...N winds 5 to 10 kt, becoming S in the afternoon. Waves around 2 ft. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. .SAT...N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. .SAT NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .SUN THROUGH MON NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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