Expires:202605210000;;343432
FZUS51 KBOX 201103
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
703 AM EDT Wed May 20 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out
to 60 NM


ANZ256-210000-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 NM South of Block Island-
703 AM EDT Wed May 20 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.TODAY...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to
6 ft. Wave Detail: SW 6 ft at 7 seconds and SE 1 foot at
15 seconds. Patchy fog this morning. A slight chance of showers
and tstms this afternoon. Vsby 1 to 3 NM this morning. 
.TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming
NW after midnight. Seas 4 to 5 ft. Wave Detail: SW 5 ft at
7 seconds and SE 2 ft at 15 seconds. Patchy fog. A chance of
showers in the evening. Showers likely after midnight. Vsby 1 to
3 NM. 
.THU...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning.
Seas 3 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and NE 2 ft at
9 seconds. A chance of showers in the morning. 
.THU NIGHT...SE winds 5 to 10 kt, becoming NE after midnight.
Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds. 
.FRI AND FRI NIGHT...E winds 10 to 15 kt. Seas around 2 ft. Wave
Detail: S 2 ft at 6 seconds and NE 2 ft at 8 seconds. 
.SAT AND SAT NIGHT...E winds 10 to 15 kt, increasing to 15 to
20 kt. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at
8 seconds and S 2 ft at 10 seconds. Showers likely. 
.SUN AND SUN NIGHT...E winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 6 ft. Showers likely.  

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.

$$