fzus51 kbox 212005
cwfbox
expires:202604220900;;762317

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

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


anz231-220900-
cape cod bay-
405 pm edt tue apr 21 2026

.tonight...s winds 5 to 10 kt. seas around 2 ft. wave detail: e
2 ft at 8 seconds and s 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: sw 2 ft at 4 seconds and ne 1 foot at
4 seconds. a chance of showers.
.wed night...s winds 5 to 10 kt. seas around 2 ft. wave detail:
se 2 ft at 4 seconds and e 1 foot at 7 seconds. patchy fog. a
chance of showers in the evening. 
.thu...w winds 5 to 10 kt, becoming nw in the afternoon. seas
1 foot or less. wave detail: sw 1 foot at 3 seconds and e 1 foot
at 5 seconds. patchy fog in the morning. 
.thu night...nw winds 5 to 10 kt. seas 1 foot or less. wave
detail: n 1 foot at 3 seconds and se 1 foot at 6 seconds. 
.fri and fri night...n winds 5 to 10 kt. seas 1 foot or less.
wave detail: nw 1 foot at 3 seconds and s 1 foot at 7 seconds. 
.sat through sun night...e winds 5 to 10 kt. seas around 2 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.

$$

fzus51 kbox 212005
cwfbox
expires:202604220900;;762321

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

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


anz232-220900-
nantucket sound-
405 pm edt tue apr 21 2026

.tonight...se winds 5 to 10 kt, becoming s after midnight. seas
around 2 ft. wave detail: e 1 foot at 5 seconds and nw 1 foot at
5 seconds. 
.wed...s winds 10 to 15 kt. gusts up to 20 kt in the afternoon.
seas 2 to 3 ft. wave detail: s 2 ft at 3 seconds and w 1 foot at
4 seconds. a chance of showers in the morning, then showers
likely in the afternoon. 
.wed night...se winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. seas 2 to 3 ft. wave detail: se 2 ft at 6 seconds
and e 1 foot at 4 seconds. patchy fog. a chance of showers in the
evening. vsby 1 to 3 nm after midnight. 
.thu...w winds 5 to 10 kt, becoming nw in the afternoon. seas
around 2 ft. wave detail: sw 2 ft at 5 seconds and e 1 foot at
4 seconds. patchy fog in the morning. 
.thu night through fri night...n winds 5 to 10 kt. seas around
2 ft. wave detail: n 1 foot at 4 seconds and s 1 foot at
6 seconds. 
.sat through sun night...ne winds 5 to 10 kt. seas around 2 ft.
wave detail: e 2 ft at 10 seconds and ne 1 foot at 2 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.

$$

fzus51 kbox 212005
cwfbox
expires:202604220900;;762322

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

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


anz233-220900-
vineyard sound-
405 pm edt tue apr 21 2026

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

$$

fzus51 kbox 212005
cwfbox
expires:202604220900;;762323

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

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


anz234-220900-
buzzards bay-
405 pm edt tue apr 21 2026

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

$$

fzus51 kbox 212005
cwfbox
expires:202604220900;;762324

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

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


anz235-220900-
rhode island sound-
405 pm edt tue apr 21 2026

.tonight...s winds 10 to 15 kt. seas around 2 ft. wave detail: s
2 ft at 3 seconds and nw 2 ft at 3 seconds. a slight chance of
showers after midnight. 
.wed...s winds around 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 4 seconds.
a chance of showers in the morning, then showers likely in the
afternoon. patchy fog in the afternoon with vsby 1 to 3 nm. 
.wed night...se winds 10 to 15 kt, becoming e 5 to 10 kt after
midnight. seas 2 to 3 ft. wave detail: nw 3 ft at 5 seconds and
se 3 ft at 6 seconds. patchy fog. a chance of showers in the
evening. vsby 1 to 3 nm after midnight. 
.thu...nw winds 5 to 10 kt, becoming w 10 to 15 kt in the
afternoon. seas 2 to 3 ft. wave detail: sw 3 ft at 6 seconds and
se 2 ft at 9 seconds. 
.thu night...n winds around 10 kt. seas 2 to 3 ft. wave detail:
nw 2 ft at 3 seconds and s 2 ft at 7 seconds. 
.fri and fri night...ne winds 5 to 10 kt. seas around 2 ft. wave
detail: s 2 ft at 6 seconds and n 1 foot at 3 seconds. 
.sat through sun night...e winds 10 to 15 kt with gusts up to
20 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.

$$

fzus51 kbox 212005
cwfbox
expires:202604220900;;762327

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

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


anz236-220900-
narragansett bay-
405 pm edt tue apr 21 2026

.tonight...s winds around 10 kt. waves 1 foot or less, then
around 2 ft after midnight. a slight chance of showers after
midnight. 
.wed...s winds 10 to 15 kt with gusts up to 20 kt. waves around
2 ft. showers likely. patchy fog in the afternoon with vsby 1 to
3 nm. 
.wed night...se winds 5 to 10 kt. waves around 2 ft. patchy fog.
a chance of showers in the evening. vsby 1 to 3 nm after
midnight. 
.thu...nw winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. waves around 2 ft. 
.thu night and fri...nw winds 5 to 10 kt. waves around 2 ft. 
.fri night...se winds 5 to 10 kt, becoming ne after midnight.
waves 1 foot or less. 
.sat through sun night...ne winds 5 to 10 kt. waves around 2 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.

$$

fzus51 kbox 212005
cwfbox
expires:202604220900;;762315

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

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


anz250-220900-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
405 pm edt tue apr 21 2026

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

$$

fzus51 kbox 212005
cwfbox
expires:202604220900;;762318

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

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


anz254-220900-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
405 pm edt tue apr 21 2026

.tonight...se winds around 5 kt, becoming s after midnight. seas
2 to 3 ft. wave detail: n 2 ft at 5 seconds and e 2 ft at
8 seconds. 
.wed...s winds 10 to 15 kt. gusts up to 20 kt in the afternoon.
seas 2 to 3 ft. wave detail: se 3 ft at 5 seconds and w 1 foot at
3 seconds. a chance of showers in the afternoon. 
.wed night...s winds 10 to 15 kt, becoming se 5 to 10 kt after
midnight. seas 2 to 3 ft. wave detail: sw 3 ft at 4 seconds and e
2 ft at 9 seconds. patchy fog. vsby 1 to 3 nm. 
.thu...sw winds 5 to 10 kt, becoming nw in the afternoon. seas
2 to 3 ft. wave detail: sw 2 ft at 5 seconds and e 2 ft at
9 seconds. patchy fog in the morning. 
.thu night through fri night...n winds 5 to 10 kt. seas 2 to
3 ft. wave detail: n 2 ft at 4 seconds and s 2 ft at 6 seconds. 
.sat through sun night...ne winds 10 to 15 kt. seas 2 to 3 ft.
wave detail: e 3 ft at 14 seconds and nw 2 ft at 5 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.

$$

fzus51 kbox 212005
cwfbox
expires:202604220900;;762319

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

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


anz255-220900-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
405 pm edt tue apr 21 2026

.tonight...se winds 5 to 10 kt, becoming s after midnight. seas
around 2 ft. wave detail: n 2 ft at 5 seconds and e 2 ft at
8 seconds. 
.wed...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
4 ft. wave detail: s 3 ft at 5 seconds and e 2 ft at 7 seconds. a
chance of showers in the morning, then showers 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 3 ft at 5 seconds and e 2 ft at 9 seconds. patchy fog.
a chance of showers in the evening. vsby 1 to 3 nm. 
.thu...w winds 5 to 10 kt. seas 3 to 4 ft. wave detail: sw 3 ft
at 6 seconds and e 2 ft at 9 seconds. patchy fog in the morning. 
.thu night through fri night...n winds 5 to 10 kt. seas 2 to
3 ft. wave detail: sw 3 ft at 7 seconds and e 2 ft at 8 seconds. 
.sat through sun night...ne winds 10 to 15 kt with gusts up to
20 kt. seas 2 to 3 ft. wave detail: e 3 ft at 8 seconds and e
3 ft at 15 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.

$$