fzus51 kbox 210804
cwfbox
expires:202604212100;;734789

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


anz230-212100-
boston harbor-
404 am edt tue apr 21 2026

.today...ne winds 5 to 10 kt, becoming se 10 to 15 kt this
afternoon. waves 1 foot or less. 
.tonight...s winds 10 to 15 kt. waves around 2 ft. 
.wed...s winds around 10 kt. waves around 2 ft. a chance of rain.
.wed night...s winds 5 to 10 kt. waves 1 foot or less. a chance
of rain in the evening. 
.thu...w winds 5 to 10 kt, becoming nw in the afternoon. waves
1 foot or less, then around 2 ft in the afternoon. a chance of
showers in the afternoon. 
.thu night...nw winds 5 to 10 kt. waves 1 foot or less. 
.fri through sat night...s winds 5 to 10 kt. waves 1 foot or
less.  

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;;734778

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


anz250-212100-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
404 am edt tue apr 21 2026

.today...ne winds 10 to 15 kt, becoming se 5 to 10 kt this
afternoon. seas 2 to 3 ft. wave detail: n 3 ft at 5 seconds and
se 1 foot at 7 seconds. 
.tonight...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: sw 3 ft at 4 seconds and e 2 ft at 6 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 4 seconds and e 2 ft at 7 seconds.
a chance of rain in the afternoon. 
.wed night...s winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. seas 2 to 3 ft. wave detail: sw 3 ft at 5 seconds and e
2 ft at 8 seconds. a chance of rain in the evening. 
.thu and thu night...nw winds 5 to 10 kt. seas around 2 ft. wave
detail: sw 2 ft at 4 seconds and e 2 ft at 8 seconds. 
.fri through sat night...sw winds 5 to 10 kt. seas 2 to 3 ft.
wave detail: n 3 ft at 5 seconds and e 3 ft at 14 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.

$$