Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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028 FZUS51 KBOX 181105 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 705 AM EDT Wed Sep 18 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-190000- 705 AM EDT Wed Sep 18 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Dense fog over the south coastal waters through mid-morning. Otherwise expect calm/tranquil boating conditions for the first half of the day. Seas then gradually rise over the south coastal waters as low-pressure moves up The Mid-Atlantic coast into this evening. Seas remain elevated through Thursday evening. SCY in effect. $$ ANZ250-190000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 705 AM EDT Wed Sep 18 2024 .TODAY...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SW 1 foot at 3 seconds. Patchy fog. Vsby 1 to 3 NM. .TONIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SE 2 ft at 11 seconds. A chance of showers after midnight with vsby 1 NM or less. .THU...NE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 10 seconds and NE 2 ft at 4 seconds. Showers likely. Vsby 1 NM or less in the morning. .THU NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 8 seconds and NE 2 ft at 4 seconds. A chance of showers. .FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 8 ft. Wave Detail: E 7 ft at 9 seconds and NE 1 foot at 4 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to 8 ft. Wave Detail: E 7 ft at 9 seconds and NE 1 foot at 4 seconds. .SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 9 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-190000- Massachusetts Bay and Ipswich Bay- 705 AM EDT Wed Sep 18 2024 .TODAY...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at 2 seconds. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...SE winds 5 to 10 kt, becoming NE after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and E 2 ft at 11 seconds. A chance of showers after midnight with vsby 1 NM or less. .THU...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 3 ft at 4 seconds. Showers likely. Vsby 1 NM or less in the morning. .THU NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 8 seconds and NE 2 ft at 4 seconds. A chance of showers. .FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 9 seconds and SE 5 ft at 8 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 7 ft. Wave Detail: E 7 ft at 9 seconds and NE 1 foot at 4 seconds. .SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 8 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. $$ ANZ231-190000- Cape Cod Bay- 705 AM EDT Wed Sep 18 2024 .TODAY...SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft this afternoon. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 8 seconds, becoming SE 2 ft at 8 seconds and E 1 foot at 2 seconds. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and E 1 foot at 2 seconds. Showers after midnight with vsby 1 NM or less. .THU...NE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 3 ft at 3 seconds. Showers. Vsby 1 to 3 NM in the morning. .THU NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 4 ft at 8 seconds and E 4 ft at 9 seconds. Showers, mainly in the evening. .FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 8 seconds and N 3 ft at 4 seconds. A chance of showers. .SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and NE 3 ft at 4 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-190000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 705 AM EDT Wed Sep 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 PM EDT THIS AFTERNOON THROUGH THURSDAY EVENING... .TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SE 2 ft at 12 seconds. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...E 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: SE 4 ft at 8 seconds and SE 2 ft at 11 seconds. A chance of showers in the evening, then showers after midnight. Vsby 1 NM or less. .THU...E winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: SE 7 ft at 8 seconds and NE 4 ft at 5 seconds. Showers. Vsby 1 to 3 NM. .THU NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 7 ft. Wave Detail: E 6 ft at 7 seconds. Showers likely, mainly in the evening with vsby 1 to 3 NM. .FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 8 ft. Wave Detail: E 8 ft at 8 seconds and SE 3 ft at 9 seconds. A chance of showers. .SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to 10 ft. Wave Detail: NE 9 ft at 9 seconds and SE 3 ft at 10 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. $$ ANZ255-190000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 705 AM EDT Wed Sep 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 PM EDT THIS AFTERNOON THROUGH THURSDAY EVENING... .TODAY...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and SE 1 foot at 12 seconds. A slight chance of showers this afternoon with vsby 1 NM or less. .TONIGHT...E winds 10 to 15 kt, becoming NE 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 8 seconds and SE 1 foot at 11 seconds. A chance of showers in the evening, then showers after midnight. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .THU...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 6 ft at 10 seconds and NE 4 ft at 5 seconds. Showers. Vsby 1 to 3 NM. .THU NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt in the evening. Seas 5 to 7 ft. Wave Detail: E 5 ft at 8 seconds and S 1 foot at 7 seconds. A chance of showers. Vsby 1 to 3 NM in the evening. .FRI AND FRI NIGHT...NE winds 20 to 25 kt. Seas 5 to 7 ft. Wave Detail: NE 6 ft at 8 seconds and NE 4 ft at 5 seconds. A chance of showers. .SAT...NE winds 20 to 25 kt. Seas 5 to 8 ft. Wave Detail: NE 6 ft at 8 seconds and NE 4 ft at 5 seconds. A chance of showers. .SAT NIGHT THROUGH SUN NIGHT...NE winds 20 to 25 kt. Seas 6 to 9 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-190000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 705 AM EDT Wed Sep 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 PM EDT THIS AFTERNOON THROUGH THURSDAY EVENING... .TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and SE 1 foot at 12 seconds. A slight chance of showers this afternoon with vsby 1 NM or less. .TONIGHT...E winds 10 to 15 kt, becoming NE 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and NE 2 ft at 4 seconds. A chance of showers in the evening, then showers after midnight. Vsby 1 to 3 NM. .THU...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: NE 5 ft at 5 seconds and E 5 ft at 8 seconds. Showers. Vsby 1 to 3 NM. .THU NIGHT...NE winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 6 to 7 ft. Wave Detail: E 6 ft at 8 seconds and NE 5 ft at 5 seconds. A chance of showers. Vsby 1 to 3 NM in the evening. .FRI AND FRI NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: NE 6 ft at 5 seconds and E 5 ft at 8 seconds. A chance of showers. .SAT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 7 ft. Wave Detail: NE 6 ft at 7 seconds and SE 3 ft at 9 seconds. A chance of showers. .SAT NIGHT THROUGH SUN NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 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. $$ ANZ232-190000- Nantucket Sound- 705 AM EDT Wed Sep 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING... .TODAY...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at 2 seconds. .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at 9 seconds. A chance of showers in the evening, then showers after midnight. Vsby 1 to 3 NM. .THU...NE winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 4 seconds and SE 3 ft at 8 seconds. Showers. Vsby 1 to 3 NM. .THU NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and E 4 ft at 9 seconds. Showers likely, mainly in the evening with vsby 1 to 3 NM. .FRI AND FRI NIGHT...NE winds around 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 4 seconds and E 3 ft at 8 seconds. A chance of showers. .SAT THROUGH SUN NIGHT...NE winds 20 to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds and NE 4 ft at 4 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-190000- Vineyard Sound- 705 AM EDT Wed Sep 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING... .TODAY...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at 2 seconds. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at 2 seconds. A chance of showers in the evening, then showers after midnight. Vsby 1 to 3 NM in the evening. .THU...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and NE 2 ft at 3 seconds. Showers. Vsby 1 to 3 NM in the afternoon. .THU NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SE 3 ft at 8 seconds. A chance of showers. .FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at 8 seconds. A chance of showers. .SAT THROUGH SUN NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft 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. $$ ANZ234-190000- Buzzards Bay- 705 AM EDT Wed Sep 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING... .TODAY...E winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft this afternoon. Wave Detail: E 1 foot at 2 seconds and SE 1 foot at 8 seconds, becoming SE 2 ft at 8 seconds and E 1 foot at 2 seconds. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at 2 seconds. A chance of showers in the evening, then showers after midnight with vsby 1 to 3 NM. .THU...NE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and NE 2 ft at 3 seconds. Showers. Vsby 1 to 3 NM in the morning. .THU NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SE 3 ft at 8 seconds. Showers likely, mainly in the evening. .FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at 8 seconds. A chance of showers. .SAT AND SAT NIGHT...NE winds around 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at 8 seconds. .SUN...NE winds around 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. .SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-190000- Rhode Island Sound- 705 AM EDT Wed Sep 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING... .TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and E 1 foot at 2 seconds. .TONIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and NE 2 ft at 3 seconds. A chance of showers in the evening, then showers after midnight. Vsby 1 to 3 NM in the evening. .THU...NE winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 8 seconds and NE 3 ft at 4 seconds. Showers. Vsby 1 to 3 NM in the afternoon. .THU NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt, diminishing to 15 to 20 kt after midnight. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 8 seconds and NE 4 ft at 4 seconds. A chance of showers. .FRI AND FRI NIGHT...NE winds 20 to 25 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 4 seconds and SE 4 ft at 8 seconds. A chance of showers. .SAT THROUGH SUN NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: NE 4 ft at 4 seconds and E 4 ft at 8 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. $$ ANZ237-190000- Block Island Sound- 705 AM EDT Wed Sep 18 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING... .TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SE 1 foot at 13 seconds. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and NE 2 ft at 3 seconds. A chance of showers in the evening, then showers after midnight. .THU...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 8 seconds and NE 3 ft at 4 seconds. Showers. Vsby 1 to 3 NM in the afternoon. .THU NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt, decreasing to 20 kt after midnight. Seas 4 to 6 ft. Wave Detail: E 5 ft at 8 seconds and NE 3 ft at 5 seconds. A chance of showers. .FRI AND FRI NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at 8 seconds and NE 3 ft at 5 seconds. A chance of showers. .SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft at 7 seconds and E 2 ft at 11 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-190000- Boston Harbor- 705 AM EDT Wed Sep 18 2024 .TODAY...S winds around 5 kt, becoming E this afternoon. Waves 1 foot or less. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...E winds 5 to 10 kt, becoming NE after midnight. Waves 1 foot or less. A chance of showers after midnight with vsby 1 NM or less. .THU...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. Showers likely. Vsby 1 to 3 NM in the morning. .THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. Showers likely, mainly in the evening. .FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. .SAT THROUGH SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. 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. $$ ANZ236-190000- Narragansett Bay- 705 AM EDT Wed Sep 18 2024 .TODAY...E winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. Showers likely after midnight. .THU...NE winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. Showers. Vsby 1 to 3 NM in the afternoon. .THU NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. Showers likely, mainly in the evening. .FRI AND FRI NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers. .SAT THROUGH SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft, except 4 to 6 ft at the bay entrance. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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