fzus51 kbox 212005
cwfbox
expires:202605220900;;417431

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 21 2026

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


anz231-220900-
cape cod bay-
404 pm edt thu may 21 2026

.tonight...se winds around 5 kt, becoming nw after midnight. seas
1 foot or less, then around 2 ft after midnight. wave detail: n
1 foot at 4 seconds and se 1 foot at 8 seconds, becoming n 1 foot
at 4 seconds and se 1 foot at 9 seconds. 
.fri...ne winds 5 to 10 kt. seas around 2 ft. wave detail: n
1 foot at 3 seconds and se 1 foot at 9 seconds. 
.fri night...se winds around 5 kt. seas 1 foot or less. wave
detail: n 1 foot at 4 seconds and se 1 foot at 10 seconds. 
.sat...e winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. seas 1 foot or less. wave detail: n 1 foot at
4 seconds and se 1 foot at 10 seconds. 
.sat night through sun night...e winds 15 to 20 kt with gusts up
to 25 kt. seas 2 to 3 ft. wave detail: se 3 ft at 4 seconds and n
1 foot at 3 seconds. showers.
.mon...n winds 5 to 10 kt. seas around 2 ft. wave detail: e 2 ft
at 4 seconds and e 2 ft at 17 seconds. a chance of showers. 
.mon night through tue night...sw 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:202605220900;;417435

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 21 2026

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


anz232-220900-
nantucket sound-
404 pm edt thu may 21 2026

.tonight...se winds around 5 kt, becoming ne after midnight. seas
around 2 ft. wave detail: e 1 foot at 3 seconds and w 1 foot at
5 seconds. 
.fri...ne winds 10 to 15 kt with gusts up to 20 kt. seas around
2 ft. wave detail: ne 2 ft at 4 seconds and sw 1 foot at
7 seconds. 
.fri night...e winds 5 to 10 kt. seas around 2 ft in the evening,
then 1 foot or less. wave detail: e 1 foot at 3 seconds and nw
1 foot at 6 seconds, becoming e 1 foot at 4 seconds and nw 1 foot
at 6 seconds. 
.sat...e winds 5 to 10 kt. seas around 2 ft. wave detail: nw
1 foot at 3 seconds and e 1 foot at 4 seconds. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. seas 2 to 3 ft. wave detail: e 2 ft at 3 seconds and n
1 foot at 3 seconds. a chance of showers in the evening, then
showers likely after midnight. 
.sun and sun night...se winds 20 to 25 kt with gusts up to 30 kt.
seas 3 to 5 ft. wave detail: se 5 ft at 6 seconds and sw 1 foot
at 10 seconds. showers.
.mon and mon night...nw winds 5 to 10 kt. seas 2 to 4 ft. a
chance of showers. 
.tue and tue night...nw winds 5 to 10 kt, becoming sw. 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:202605220900;;417436

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 21 2026

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


anz233-220900-
vineyard sound-
404 pm edt thu may 21 2026

.tonight...se winds 5 to 10 kt, becoming ne after midnight. seas
around 2 ft. wave detail: e 1 foot at 3 seconds and sw 1 foot at
6 seconds. 
.fri...ne winds 10 to 15 kt. gusts up to 20 kt in the morning.
seas around 2 ft. wave detail: ne 2 ft at 3 seconds and sw 1 foot
at 7 seconds. 
.fri night...e winds 5 to 10 kt. seas around 2 ft in the evening,
then 1 foot or less. wave detail: e 1 foot at 3 seconds and nw
1 foot at 6 seconds, becoming ne 1 foot at 4 seconds and s 1 foot
at 7 seconds. 
.sat...e winds 5 to 10 kt. seas around 2 ft. wave detail: n
1 foot at 3 seconds and s 1 foot at 8 seconds. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. seas 2 to 3 ft. wave detail: ne 2 ft at 3 seconds and s
1 foot at 8 seconds. a chance of showers in the evening, then
showers likely after midnight. 
.sun and sun night...e winds 20 to 25 kt. seas 3 to 5 ft. wave
detail: e 3 ft at 4 seconds and s 3 ft at 9 seconds. showers.
.mon...nw winds 5 to 10 kt. seas 2 to 4 ft. a chance of showers. 
.mon night through tue night...sw 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.

$$

fzus51 kbox 212005
cwfbox
expires:202605220900;;417437

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 21 2026

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


anz234-220900-
buzzards bay-
404 pm edt thu may 21 2026

.tonight...se winds around 5 kt, becoming n after midnight. seas
around 2 ft. wave detail: e 1 foot at 2 seconds and sw 1 foot at
6 seconds. 
.fri...ne winds 10 to 15 kt. gusts up to 20 kt in the morning.
seas around 2 ft. wave detail: ne 1 foot at 2 seconds and sw
1 foot at 6 seconds. 
.fri night...e winds 5 to 10 kt, diminishing to around 5 kt after
midnight. seas around 2 ft in the evening, then 1 foot or less.
wave detail: e 1 foot at 3 seconds and nw 1 foot at 6 seconds,
becoming ne 1 foot at 2 seconds and n 1 foot at 5 seconds. 
.sat...e winds 5 to 10 kt. seas around 2 ft. wave detail: e
1 foot at 2 seconds and nw 1 foot at 3 seconds. 
.sat night through sun night...e winds 20 to 25 kt. seas 2 to
4 ft. wave detail: ne 3 ft at 3 seconds and se 1 foot at
8 seconds. a chance of showers in the evening, then showers. 
.mon...nw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: ne
1 foot at 3 seconds and w 1 foot at 5 seconds. a chance of
showers. 
.mon night through tue night...sw 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:202605220900;;417438

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 21 2026

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


anz235-220900-
rhode island sound-
404 pm edt thu may 21 2026

.tonight...se winds 5 to 10 kt, becoming ne after midnight. seas
2 to 3 ft. wave detail: sw 3 ft at 7 seconds and e 1 foot at
3 seconds. 
.fri...ne winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: ne 2 ft at 3 seconds and sw 2 ft at 7 seconds.
.fri night...e winds 5 to 10 kt. seas around 2 ft. wave detail: e
2 ft at 5 seconds and nw 1 foot at 6 seconds. 
.sat...e winds 10 to 15 kt. seas 2 to 3 ft. wave detail: e 3 ft
at 5 seconds and nw 1 foot at 3 seconds. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 4 ft. wave detail: se 4 ft
at 7 seconds and ne 2 ft at 3 seconds. showers.
.sun...e winds 20 to 25 kt with gusts up to 30 kt. seas 4 to
6 ft. wave detail: se 6 ft at 8 seconds and ne 3 ft at 4 seconds.
showers.
.sun night...e winds 20 to 25 kt, diminishing to 10 to 15 kt
after midnight. seas 5 to 7 ft. showers.
.mon...nw winds 5 to 10 kt. seas 4 to 6 ft. a chance of showers. 
.mon night through tue night...sw winds 5 to 10 kt. seas 2 to
4 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:202605220900;;417441

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 21 2026

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


anz236-220900-
narragansett bay-
404 pm edt thu may 21 2026

.tonight...s winds 5 to 10 kt, becoming n after midnight. waves
around 2 ft. 
.fri...ne winds 10 to 15 kt. waves around 2 ft. 
.fri night...e winds 5 to 10 kt, diminishing to around 5 kt after
midnight. waves around 2 ft. 
.sat...e winds 5 to 10 kt. waves around 2 ft. 
.sat night through sun night...ne winds 15 to 20 kt with gusts up
to 25 kt. waves 2 to 4 ft. showers.
.mon...nw winds 5 to 10 kt. waves 2 to 3 ft. a chance of showers.
.mon night through tue night...sw winds 5 to 10 kt. waves 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:202605220900;;417429

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 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-
404 pm edt thu may 21 2026

.tonight...s winds around 5 kt, becoming n after midnight. seas
around 2 ft. wave detail: n 2 ft at 4 seconds and se 1 foot at
9 seconds. 
.fri...ne winds 5 to 10 kt. seas around 2 ft. wave detail: ne
2 ft at 4 seconds and nw 1 foot at 3 seconds. 
.fri night...s winds around 5 kt. seas around 2 ft in the
evening, then 1 foot or less. wave detail: nw 2 ft at 3 seconds
and ne 1 foot at 4 seconds, becoming w 1 foot at 2 seconds and ne
1 foot at 4 seconds. 
.sat...e winds around 5 kt. seas 1 foot or less. wave detail: n
1 foot at 3 seconds and se 1 foot at 10 seconds. 
.sat night...se winds 5 to 10 kt. seas 1 foot or less, then
around 2 ft after midnight. wave detail: e 1 foot at 3 seconds
and se 1 foot at 10 seconds, becoming se 2 ft at 9 seconds and ne
1 foot at 3 seconds. a chance of showers after midnight. 
.sun...e winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: se
4 ft at 5 seconds and sw 1 foot at 4 seconds. showers.
.sun night...e winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 ft. showers.
.mon...ne winds 10 to 15 kt with gusts up to 20 kt. seas 4 to
6 ft. showers likely. 
.mon night...n winds 5 to 10 kt. seas 4 to 6 ft. 
.tue and tue night...sw winds 5 to 10 kt. seas 2 to 4 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:202605220900;;417432

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 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-
404 pm edt thu may 21 2026

.tonight...se winds around 5 kt, becoming n after midnight. seas
2 to 3 ft. wave detail: n 2 ft at 5 seconds and s 2 ft at
7 seconds. 
.fri...ne winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. seas 2 to 3 ft. wave detail: n 2 ft at 5 seconds and s
2 ft at 8 seconds. 
.fri night...e winds 5 to 10 kt, diminishing to around 5 kt after
midnight. seas around 2 ft. wave detail: n 2 ft at 4 seconds and
se 2 ft at 8 seconds. 
.sat...e winds 5 to 10 kt. seas around 2 ft. wave detail: se 2 ft
at 9 seconds and n 1 foot at 4 seconds. 
.sat night...e winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. seas 2 to 3 ft. wave detail: se
3 ft at 7 seconds and n 1 foot at 3 seconds. a chance of showers
after midnight. 
.sun and sun night...se winds 15 to 20 kt with gusts up to 30 kt.
seas 4 to 6 ft. wave detail: se 6 ft at 6 seconds and sw 1 foot
at 6 seconds. showers.
.mon...w winds 10 to 15 kt with gusts up to 20 kt. seas 5 to
7 ft. a chance of showers. 
.mon night...nw winds 5 to 10 kt. seas 4 to 6 ft. a chance of
showers. 
.tue...nw winds 5 to 10 kt. seas 2 to 4 ft. a chance of showers. 
.tue night...sw winds 5 to 10 kt. seas 2 to 4 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:202605220900;;417433

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt thu may 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-
404 pm edt thu may 21 2026

.tonight...e winds 5 to 10 kt, becoming ne after midnight. seas
2 to 3 ft. wave detail: s 3 ft at 7 seconds and e 2 ft at
4 seconds. 
.fri...ne winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: ne 3 ft at 4 seconds and sw 2 ft at 7 seconds.
.fri night...e winds 5 to 10 kt. seas 2 to 3 ft. wave detail: e
2 ft at 4 seconds and se 2 ft at 8 seconds. 
.sat...e winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: e 2 ft at 4 seconds and se 2 ft at 8 seconds. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 4 ft. wave detail: se 4 ft
at 7 seconds and n 2 ft at 4 seconds. a chance of showers in the
evening, then showers likely after midnight. 
.sun...e winds 20 to 25 kt with gusts up to 30 kt. seas 5 to
7 ft. wave detail: se 7 ft at 7 seconds and ne 2 ft at 4 seconds.
showers.
.sun night...se winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. gusts up to 30 kt. seas 5 to 7 ft. showers.
.mon...w winds around 10 kt. seas 5 to 7 ft. a chance of showers.
.mon night...w winds 5 to 10 kt. seas 3 to 5 ft. a chance of
showers. 
.tue...nw winds around 5 kt. seas 2 to 4 ft. a chance of showers.
.tue night...sw winds 5 to 10 kt. seas 2 to 4 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.

$$