fzus51 kbox 211705
cwfbox
expires:202605220600;;408712

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

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


anz235-220600-
rhode island sound-
104 pm edt thu may 21 2026

.this afternoon...e winds around 10 kt. seas 2 to 3 ft. wave
detail: sw 3 ft at 7 seconds and e 2 ft at 3 seconds. a slight
chance of showers. 
.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 around
2 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. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 3 to 5 ft. wave detail: se 5 ft
at 6 seconds and ne 2 ft at 3 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 4 to
6 ft. showers.
.sun night...e winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 ft. showers likely. 
.mon and mon night...nw winds 5 to 10 kt, becoming sw. seas 2 to
4 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 211705
cwfbox
expires:202605220600;;408715

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

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


anz236-220600-
narragansett bay-
104 pm edt thu may 21 2026

.this afternoon...se winds 5 to 10 kt. waves around 2 ft. a
slight chance of showers. 
.tonight...s winds 5 to 10 kt, becoming n after midnight. waves
around 2 ft. 
.fri...e winds around 10 kt. waves around 2 ft. 
.fri night...se winds 5 to 10 kt, becoming e after midnight.
waves around 2 ft in the evening, then 1 foot or less. 
.sat...e winds 5 to 10 kt. waves 1 foot or less, then around 2 ft
in the afternoon. 
.sat night...e winds 10 to 15 kt. gusts up to 20 kt after
midnight. waves 2 to 3 ft. a chance of showers in the evening,
then showers likely after midnight. 
.sun and sun night...e winds 15 to 20 kt, diminishing to 10 to
15 kt. gusts up to 25 kt. waves 2 to 4 ft. showers.
.mon and mon night...nw winds 5 to 10 kt, becoming sw. waves 2 to
3 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 211705
cwfbox
expires:202605220600;;408713

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

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


anz237-220600-
block island sound-
104 pm edt thu may 21 2026

.this afternoon...e winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: sw 3 ft at 7 seconds and e 1 foot at 3 seconds. a slight
chance of showers. 
.tonight...se winds around 5 kt, becoming ne after midnight. seas
around 2 ft. wave detail: sw 2 ft at 7 seconds and e 1 foot at
4 seconds. 
.fri...e winds 10 to 15 kt with gusts up to 20 kt. seas around
2 ft. wave detail: e 2 ft at 4 seconds and s 2 ft at 7 seconds. 
.fri night...e winds 5 to 10 kt. seas around 2 ft. wave detail: e
2 ft at 4 seconds and se 2 ft at 7 seconds. 
.sat...e winds 10 to 15 kt. gusts up to 20 kt in the afternoon.
seas 2 to 3 ft. wave detail: se 3 ft at 7 seconds and e 2 ft at
3 seconds. a chance of showers in the afternoon. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 3 to 5 ft. wave detail: se 4 ft
at 7 seconds and e 3 ft at 4 seconds. showers.
.sun and sun night...e winds 15 to 20 kt with gusts up to 30 kt.
seas 4 to 6 ft. showers.
.mon...w winds 5 to 10 kt. seas 3 to 5 ft. a chance of showers. 
.mon night...w winds 5 to 10 kt. seas 2 to 4 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 211705
cwfbox
expires:202605220600;;408707

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

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


anz255-220600-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
104 pm edt thu may 21 2026

.this afternoon...ne winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 4 ft. wave detail: s 3 ft at 7 seconds and n 2 ft at
4 seconds. a slight chance of showers. 
.tonight...e winds 5 to 10 kt. 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 2 ft at 4 seconds and sw 2 ft at 7 seconds.
.fri night...e winds 5 to 10 kt. seas around 2 ft. wave detail: n
2 ft at 5 seconds and se 2 ft at 8 seconds. 
.sat...e winds 10 to 15 kt. seas 2 to 3 ft. wave detail: n 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 3 to 5 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 and sun night...e winds 20 to 25 kt with gusts up to 30 kt.
seas 4 to 6 ft. showers.
.mon and mon night...w winds 5 to 10 kt. seas 3 to 5 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.

$$