fzus51 kbox 210803
cwfbox
expires:202609212100;;807586

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt mon sep 21 2026

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


anz237-212100-
block island sound-
403 am edt mon sep 21 2026

...small craft advisory in effect from 8 am edt this morning
through this afternoon...
...gale watch in effect from tuesday afternoon through thursday
afternoon...

.today...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 se 2 ft at
10 seconds. a chance of showers this morning. 
.tonight...ne winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: ne 3 ft at 5 seconds and sw 1 foot at
5 seconds. 
.tue...ne winds 15 to 20 kt with gusts up to 30 kt. seas 3 to
5 ft. wave detail: ne 5 ft at 6 seconds and se 1 foot at
9 seconds. 
.tue night...ne winds 15 to 20 kt, increasing to 20 to 25 kt
after midnight. gusts up to 30 kt. seas 4 to 6 ft. wave detail:
ne 5 ft at 5 seconds and se 1 foot at 10 seconds. 
.wed and wed night...ne winds 25 to 30 kt with gusts up to 35 kt.
seas 5 to 8 ft. wave detail: e 8 ft at 9 seconds and e 7 ft at
6 seconds. 
.thu...ne winds 25 to 30 kt with gusts up to 35 kt. seas 6 to
9 ft. wave detail: se 9 ft at 12 seconds and ne 5 ft at
5 seconds. 
.thu night...ne winds 25 to 30 kt with gusts up to 40 kt. seas
6 to 9 ft. a chance of showers. 
.fri...n winds 25 to 30 kt with gusts up to 45 kt. seas 7 to
10 ft. a chance of showers. 
.fri night...n winds around 30 kt with gusts up to 45 kt. seas
7 to 10 ft. showers likely.  

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 210803
cwfbox
expires:202609212100;;807580

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt mon sep 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-
403 am edt mon sep 21 2026

...small craft advisory in effect from 8 am edt this morning
through late tonight...
...gale watch in effect from tuesday afternoon through thursday
afternoon...

.today...ne winds 20 to 25 kt. seas 2 to 4 ft. wave detail: ne
4 ft at 5 seconds and se 2 ft at 9 seconds. patchy fog. a chance
of showers this morning with vsby 1 to 3 nm. 
.tonight...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: ne 4 ft at 5 seconds and se 2 ft at 8 seconds.
.tue...ne winds 20 to 25 kt with gusts up to 30 kt. seas 4 to
6 ft. wave detail: n 6 ft at 6 seconds and se 1 foot at
15 seconds. 
.tue night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
5 to 7 ft. wave detail: ne 7 ft at 7 seconds and e 5 ft at
13 seconds. 
.wed...ne winds 25 to 30 kt with gusts up to 35 kt. seas 6 to
9 ft. wave detail: e 8 ft at 8 seconds and n 1 foot at 4 seconds.
.wed night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
8 to 11 ft. wave detail: e 9 ft at 9 seconds and ne 7 ft at
7 seconds. 
.thu...ne winds 25 to 30 kt with gusts up to 35 kt. seas 9 to
12 ft. 
.thu night...ne winds around 30 kt with gusts up to 40 kt. seas
9 to 12 ft. a chance of showers. 
.fri...ne winds 30 to 40 kt with gusts up to 50 kt. seas 9 to
13 ft. showers likely. 
.fri night...ne winds 35 to 40 kt with gusts up to 50 kt. seas
9 to 13 ft. showers likely.  

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.

$$