fzus51 kbox 210503
cwfbox
expires:202605211800;;381459

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

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


anz230-211800-
boston harbor-
103 am edt thu may 21 2026

.rest of tonight...n winds around 10 kt. waves 1 foot or less. 
.thu...ne winds 5 to 10 kt, becoming e in the afternoon. waves
1 foot or less. 
.thu night...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 210503
cwfbox
expires:202605211800;;381450

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

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


anz231-211800-
cape cod bay-
103 am edt thu may 21 2026

.rest of tonight...n winds 5 to 10 kt. seas 1 foot or less. wave
detail: nw 1 foot at 4 seconds and e 1 foot at 17 seconds. a
slight chance of showers. 
.thu...ne winds around 10 kt, becoming e in the afternoon. seas
around 2 ft. wave detail: n 1 foot at 4 seconds and e 1 foot at
15 seconds. 
.thu night...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 14 seconds. 
.fri...ne winds 5 to 10 kt. seas around 2 ft. wave detail: ne
1 foot at 4 seconds and e 1 foot at 14 seconds. 
.fri night...se winds around 5 kt. seas 1 foot or less. wave
detail: ne 1 foot at 3 seconds and e 1 foot at 9 seconds. 
.sat...e winds around 5 kt, increasing to 5 to 10 kt in the
afternoon. seas 1 foot or less. wave detail: ne 1 foot at
3 seconds and se 1 foot at 12 seconds.
.sat night...e winds 5 to 10 kt. seas 1 foot or less, then around
2 ft after midnight. 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 210503
cwfbox
expires:202605211800;;381448

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

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


anz250-211800-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
103 am edt thu may 21 2026

.rest of tonight...n winds around 10 kt. seas 2 to 3 ft. wave
detail: nw 3 ft at 5 seconds. a slight chance of showers. 
.thu...n winds around 10 kt, becoming e in the afternoon. seas
2 to 3 ft. wave detail: n 3 ft at 5 seconds. 
.thu night...s winds around 5 kt, becoming n after midnight. seas
around 2 ft. wave detail: ne 2 ft at 6 seconds. 
.fri...ne winds around 10 kt, becoming e in the afternoon. seas
around 2 ft. wave detail: ne 2 ft at 5 seconds and se 1 foot at
14 seconds. 
.fri night...s winds around 5 kt, becoming w around 5 kt after
midnight. seas around 2 ft. wave detail: e 2 ft at 6 seconds and
se 1 foot at 14 seconds. 
.sat...e winds around 5 kt. seas 1 foot or less. wave detail: se
1 foot at 8 seconds and se 1 foot at 11 seconds. 
.sat night...se winds 5 to 10 kt. seas 1 foot or less, then
around 2 ft after midnight. 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 210638
cwfgyx
expires:202605212045;;387217

coastal waters forecast
national weather service gray me
238 am edt thu may 21 2026

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


anz154-212045-
coastal waters from cape elizabeth, me to merrimack river, ma out
25 nm-
238 am edt thu may 21 2026

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

$$