Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
975 FZUS51 KBOX 132105 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 405 PM EST Fri Feb 13 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-141000- 405 PM EST Fri Feb 13 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres will remain the dominant weather feature through this weekend. A weak front will cross the waters Sat night with an increase in wind bringing potential for light freezing spray. Coastal low pres passes well south of the waters late Sun night into Mon. High pres builds over the waters Mon night and Tue. A cold front will move south across the waters Tue night into Wed. $$ ANZ250-141000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 405 PM EST Fri Feb 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY MORNING... .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and NE 2 ft at 5 seconds. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and NE 1 foot at 5 seconds. .SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 5 seconds and SE 1 foot at 10 seconds. .SUN...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: N 4 ft at 6 seconds and E 1 foot at 11 seconds. Light freezing spray in the morning. .SUN NIGHT THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 6 seconds and W 1 foot at 3 seconds. .TUE AND TUE NIGHT...SW winds 10 to 15 kt, becoming W with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 9 seconds. .WED...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain. .WED NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of rain and snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-141000- Massachusetts Bay and Ipswich Bay- 405 PM EST Fri Feb 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY MORNING... .TONIGHT...W winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 5 seconds. .SAT...W winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 5 seconds. .SAT NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 foot at 9 seconds. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and E 1 foot at 10 seconds. .SUN NIGHT THROUGH MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 6 seconds. .TUE AND TUE NIGHT...SW winds around 10 kt, becoming W. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at 8 seconds. .WED...W winds around 10 kt. Seas around 2 ft. A chance of rain. .WED NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain and snow. 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. $$ ANZ231-141000- Cape Cod Bay- 405 PM EST Fri Feb 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY MORNING... .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and E 1 foot at 8 seconds. .SAT...W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 5 seconds. .SAT NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 1 foot at 9 seconds. .SUN...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 1 foot at 8 seconds. .SUN NIGHT AND MON...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and E 1 foot at 10 seconds. .MON NIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 3 seconds and E 1 foot at 9 seconds. .TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .WED...W winds around 10 kt. Seas around 2 ft. A chance of rain. .WED NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of rain and snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-141000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 405 PM EST Fri Feb 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY MORNING... .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 6 seconds and W 2 ft at 4 seconds. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and NE 2 ft at 6 seconds. .SAT NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and SE 1 foot at 9 seconds. .SUN...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 4 ft at 6 seconds and S 1 foot at 7 seconds. .SUN NIGHT THROUGH MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 6 seconds and E 1 foot at 10 seconds. .TUE AND TUE NIGHT...SW winds 5 to 10 kt, becoming W. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 3 seconds. .WED...W winds around 10 kt. Seas 2 to 3 ft. A chance of rain. .WED NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of rain and snow. 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. $$ ANZ255-141000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and NE 1 foot at 6 seconds. A chance of flurries after midnight. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and NE 1 foot at 7 seconds. A chance of flurries in the morning. .SAT NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and NE 1 foot at 5 seconds. .SUN...NW winds 15 to 20 kt, becoming N 5 to 10 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds. .SUN NIGHT AND MON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and SW 2 ft at 5 seconds. .MON NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 11 seconds and S 2 ft at 5 seconds. .TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. .WED...W winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. .WED NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. A chance of rain and snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-141000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and NE 1 foot at 3 seconds. A chance of flurries after midnight. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of flurries in the morning. .SAT NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and SE 1 foot at 9 seconds. .SUN...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds. .SUN NIGHT AND MON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds. .MON NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 10 seconds and S 2 ft at 5 seconds. .TUE AND TUE NIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt. Seas 3 to 4 ft. .WED...SW winds 10 to 15 kt. Seas around 3 ft. A chance of rain. .WED NIGHT...NW winds 15 to 20 kt. Seas 3 to 4 ft. Rain likely with a chance of snow. 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. $$ ANZ232-141000- Nantucket Sound- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 7 seconds. A chance of flurries after midnight. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 6 seconds. A chance of flurries in the morning. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and N 1 foot at 5 seconds. .SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and E 1 foot at 12 seconds. .SUN NIGHT AND MON...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and W 1 foot at 5 seconds. .MON NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: SE 1 foot at 4 seconds and E 1 foot at 9 seconds. .TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .WED...W winds around 10 kt. Seas around 2 ft. A chance of rain. .WED NIGHT...W winds 10 to 15 kt. Seas around 2 ft. A chance of rain and snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-141000- Vineyard Sound- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 6 seconds. A chance of flurries after midnight. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 6 seconds. A chance of flurries in the morning. .SAT NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. .SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 2 ft at 5 seconds, becoming N 1 foot at 4 seconds and W 1 foot at 5 seconds. .SUN NIGHT AND MON...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 5 seconds. .MON NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 10 seconds and SE 1 foot at 4 seconds. .TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .WED...SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain. .WED NIGHT...NW winds 10 to 15 kt. Seas around 2 ft. A chance of rain and snow. 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. $$ ANZ234-141000- Buzzards Bay- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 4 seconds and NE 1 foot at 5 seconds. A chance of flurries after midnight. .SAT...W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and NE 1 foot at 6 seconds. A chance of flurries in the morning. .SAT NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. .SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming NE around 5 kt in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 2 ft at 4 seconds and E 1 foot at 11 seconds, becoming N 1 foot at 4 seconds and W 1 foot at 5 seconds. .SUN NIGHT AND MON...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 5 seconds. .MON NIGHT...SE winds around 5 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SE 1 foot at 2 seconds and S 1 foot at 5 seconds, becoming S 2 ft at 10 seconds and SE 1 foot at 4 seconds. .TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .WED...SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain. .WED NIGHT...NW winds 10 to 15 kt. Seas around 2 ft. A chance of rain and snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-141000- Rhode Island Sound- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and NE 1 foot at 3 seconds. A chance of flurries after midnight. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and S 1 foot at 9 seconds. A chance of flurries in the morning. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and SE 1 foot at 8 seconds. .SUN...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 3 ft in the morning, then 1 foot or less. Wave Detail: N 2 ft at 4 seconds, becoming N 1 foot at 3 seconds and SW 1 foot at 5 seconds. .SUN NIGHT AND MON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 2 seconds and SW 1 foot at 5 seconds. .MON NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 10 seconds and S 2 ft at 5 seconds. .TUE AND TUE NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. .WED NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Rain likely with a chance of snow. 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. $$ ANZ237-141000- Block Island Sound- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and W 1 foot at 3 seconds. A chance of flurries after midnight. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of flurries in the morning. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and S 1 foot at 8 seconds. .SUN...N winds 5 to 10 kt with gusts up to 20 kt, becoming E in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 2 ft at 3 seconds, becoming NE 1 foot at 2 seconds and SW 1 foot at 5 seconds. .SUN NIGHT AND MON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and SW 1 foot at 5 seconds. .MON NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 10 seconds and SE 2 ft at 5 seconds. .TUE AND TUE NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain. .WED NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely with a chance of snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-141000- Boston Harbor- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .SAT...W winds 5 to 10 kt. Waves around 2 ft. .SAT NIGHT...NW winds 10 to 15 kt. Gusts up to 25 kt after midnight. Waves around 2 ft. .SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Waves around 2 ft in the morning, then 1 foot or less. .SUN NIGHT THROUGH MON NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .TUE AND TUE NIGHT...SW winds 5 to 10 kt, becoming W. Waves 1 foot or less. .WED...W winds 5 to 10 kt. Waves 1 foot or less. A chance of rain. .WED NIGHT...NW winds 10 to 15 kt. Waves around 2 ft. A chance of rain and snow. 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. $$ ANZ236-141000- Narragansett Bay- 405 PM EST Fri Feb 13 2026 .TONIGHT...W winds 5 to 10 kt. Waves around 2 ft. A chance of flurries after midnight. .SAT...W winds 5 to 10 kt. Waves around 2 ft. A chance of flurries in the morning. .SAT NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. .SUN...N winds 5 to 10 kt, becoming E in the afternoon. Waves around 2 ft in the morning, then 1 foot or less. .SUN NIGHT AND MON...SE winds around 5 kt. Waves 1 foot or less. .MON NIGHT...SE winds around 5 kt, becoming S after midnight. Waves 1 foot or less, then around 2 ft after midnight. .TUE AND TUE NIGHT...W winds 5 to 10 kt. Waves around 2 ft. .WED...SW winds 5 to 10 kt. Waves around 2 ft. A chance of rain. .WED NIGHT...N winds around 10 kt. Waves around 2 ft. Rain likely with a chance of snow. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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