fzus51 kbox 211705
cwfbox
expires:202605220600;;408714

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


anz230-220600-
boston harbor-
104 pm edt thu may 21 2026

.this afternoon...e winds 5 to 10 kt. waves 1 foot or less.
.tonight...s winds 5 to 10 kt, becoming n after midnight. waves
1 foot or less. 
.fri...ne winds around 10 kt, becoming e in the afternoon. waves
1 foot or less. 
.fri night...se winds 5 to 10 kt, becoming sw after midnight.
waves 1 foot or less. 
.sat...ne winds 5 to 10 kt, becoming e in the afternoon. waves
1 foot or less. 
.sat night...se winds 5 to 10 kt. waves 1 foot or less, then
around 2 ft after midnight. showers likely after midnight. 
.sun and sun night...e winds 10 to 15 kt with gusts up to 20 kt.
waves 2 to 3 ft. showers.
.mon and mon night...ne winds 5 to 10 kt, becoming sw. waves
1 foot or less. 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;;408705

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


anz231-220600-
cape cod bay-
104 pm edt thu may 21 2026

.this afternoon...e winds 5 to 10 kt. seas 1 foot or less. wave
detail: n 1 foot at 4 seconds and se 1 foot at 9 seconds. 
.tonight...s winds around 5 kt, becoming nw after midnight. seas
1 foot or less. wave detail: n 1 foot at 4 seconds and se 1 foot
at 9 seconds. 
.fri...ne winds 5 to 10 kt. gusts up to 20 kt in the morning.
seas around 2 ft. wave detail: n 1 foot at 4 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...e 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 nw
1 foot at 3 seconds, becoming e 2 ft at 2 seconds. a chance of
showers after midnight. 
.sun and sun night...e winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 3 ft. showers.
.mon and mon night...nw winds 5 to 10 kt, becoming w. seas around
2 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;;408703

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


anz250-220600-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
104 pm edt thu may 21 2026

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

$$

fzus51 kgyx 211841
cwfgyx
expires:202605220845;;414429

coastal waters forecast
national weather service gray me
241 pm edt thu may 21 2026

coastal waters from stonington me to merrimack river ma out to 25 nm


anz154-220845-
coastal waters from cape elizabeth, me to merrimack river, ma out
25 nm-
241 pm edt thu may 21 2026

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

$$