fzus51 kbox 210804
cwfbox
expires:202604212100;;734787

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 am edt tue apr 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz235-212100-
rhode island sound-
404 am edt tue apr 21 2026

.today...ne winds 10 to 15 kt, becoming s 5 to 10 kt this
afternoon. seas around 2 ft. wave detail: n 2 ft at 4 seconds and
s 1 foot at 7 seconds. 
.tonight...s winds 10 to 15 kt. seas 1 foot or less, then around
2 ft after midnight. wave detail: sw 1 foot at 4 seconds and e
1 foot at 6 seconds, becoming sw 2 ft at 4 seconds and e 1 foot
at 7 seconds. 
.wed...s winds 15 to 20 kt. seas 2 to 3 ft. wave detail: sw 3 ft
at 5 seconds and e 1 foot at 8 seconds. rain likely. 
.wed night...se winds 10 to 15 kt, becoming e 5 to 10 kt after
midnight. seas 2 to 3 ft. wave detail: se 3 ft at 7 seconds and w
2 ft at 5 seconds. rain likely in the evening. 
.thu...nw winds 5 to 10 kt, becoming w in the afternoon. seas
2 to 3 ft. wave detail: s 3 ft at 6 seconds and nw 1 foot at
3 seconds. 
.thu night...nw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: sw
3 ft at 6 seconds and nw 1 foot at 3 seconds. 
.fri through sat...e winds 5 to 10 kt. seas around 2 ft. 
.sat night...e winds 5 to 10 kt. seas around 2 ft. a chance of
showers.  

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.

$$

fzus51 kbox 210804
cwfbox
expires:202604212100;;734790

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 am edt tue apr 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz236-212100-
narragansett bay-
404 am edt tue apr 21 2026

.today...n winds 5 to 10 kt, becoming s this afternoon. waves
around 2 ft this morning, then 1 foot or less.
.tonight...s winds around 10 kt. waves 1 foot or less. 
.wed...s winds 10 to 15 kt with gusts up to 20 kt. waves around
2 ft. rain likely. 
.wed night...se winds 5 to 10 kt, becoming e after midnight.
waves around 2 ft. rain likely in the evening. 
.thu and thu night...nw winds 5 to 10 kt. waves around 2 ft. 
.fri through sat...e winds 5 to 10 kt. waves around 2 ft. 
.sat night...e winds 5 to 10 kt. waves 1 foot or less. a chance
of showers.  

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.

$$

fzus51 kbox 210804
cwfbox
expires:202604212100;;734788

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 am edt tue apr 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz237-212100-
block island sound-
404 am edt tue apr 21 2026

.today...ne winds 10 to 15 kt, becoming s 5 to 10 kt this
afternoon. seas around 2 ft. wave detail: ne 2 ft at 4 seconds
and nw 1 foot at 3 seconds. 
.tonight...s winds 10 to 15 kt. seas 1 foot or less, then around
2 ft after midnight. wave detail: sw 1 foot at 4 seconds and e
1 foot at 6 seconds, becoming sw 2 ft at 4 seconds and e 1 foot
at 7 seconds. 
.wed...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: sw 3 ft at 5 seconds and e 1 foot at
8 seconds. rain likely. 
.wed night...se winds 10 to 15 kt, becoming e around 5 kt after
midnight. seas 2 to 3 ft. wave detail: sw 3 ft at 5 seconds and e
1 foot at 7 seconds. a chance of rain in the evening. 
.thu...nw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: s 3 ft
at 6 seconds and nw 1 foot at 3 seconds. 
.thu night...nw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: s
2 ft at 6 seconds and w 1 foot at 3 seconds. 
.fri and fri night...nw winds 5 to 10 kt, becoming se. seas
around 2 ft. 
.sat and sat night...e winds 5 to 10 kt. seas around 2 ft. a
chance of showers.  

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.

$$

fzus51 kbox 210804
cwfbox
expires:202604212100;;734782

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 am edt tue apr 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz255-212100-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
404 am edt tue apr 21 2026

.today...ne winds 10 to 15 kt with gusts up to 20 kt, becoming e
5 to 10 kt this afternoon. seas 2 to 3 ft. wave detail: n 3 ft at
5 seconds and s 1 foot at 7 seconds. 
.tonight...s winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 7 seconds and nw 1 foot at 4 seconds. 
.wed...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: se 3 ft at 6 seconds and w 2 ft at 5 seconds.
rain likely in the afternoon. 
.wed night...se winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. seas 3 to 4 ft. wave
detail: se 4 ft at 5 seconds and w 2 ft at 6 seconds. a chance of
rain in the evening. 
.thu...n winds 5 to 10 kt, becoming w in the afternoon. seas 3 to
4 ft. wave detail: sw 3 ft at 6 seconds and e 2 ft at 9 seconds. 
.thu night...nw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: sw
3 ft at 6 seconds and e 2 ft at 8 seconds. 
.fri through sat night...e 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.

$$