fzus51 kbox 182006
cwfbox
expires:202605190900;;785265

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz231-190900-
cape cod bay-
405 pm edt mon may 18 2026

.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas around 2 ft. wave detail: s 1 foot at 2 seconds
and ne 1 foot at 3 seconds. patchy fog. vsby 1 nm or less this
evening. 
.tue...sw winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas around 2 ft, building to 3 to
4 ft in the afternoon. wave detail: sw 1 foot at 3 seconds and e
1 foot at 4 seconds, becoming sw 2 ft at 3 seconds and e 1 foot
at 4 seconds. patchy fog in the morning with vsby 1 to 3 nm. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
2 to 4 ft. wave detail: sw 2 ft at 4 seconds and se 1 foot at
9 seconds. 
.wed...sw winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: sw 2 ft at 3 seconds and se 1 foot at
10 seconds. showers likely in the afternoon. 
.wed night...w winds 10 to 15 kt, becoming nw after midnight.
gusts up to 20 kt. seas 2 to 3 ft. wave detail: sw 2 ft at
3 seconds and n 2 ft at 3 seconds. a chance of showers in the
evening. 
.thu and thu night...nw winds 10 to 15 kt with gusts up to 20 kt.
seas around 2 ft. wave detail: n 2 ft at 5 seconds and s 1 foot
at 6 seconds. 
.fri...e winds 5 to 10 kt. seas 1 foot or less. 
.fri night...sw winds 5 to 10 kt. seas 1 foot or less. a chance
of showers. 
.sat and sat night...e winds 5 to 10 kt. seas 1 foot or less.
showers likely.  

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 182006
cwfbox
expires:202605190900;;785269

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz232-190900-
nantucket sound-
405 pm edt mon may 18 2026

.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 2 ft at 4 seconds and e
1 foot at 3 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: sw 3 ft at 4 seconds and e 1 foot at
3 seconds. patchy fog in the morning with vsby 1 nm or less. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 4 ft. wave detail: sw 4 ft at 5 seconds and se 1 foot at
9 seconds. patchy fog. vsby 1 nm or less. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. wave detail: sw 3 ft at 5 seconds and se 1 foot at
9 seconds. a chance of showers in the afternoon. 
.wed night...w winds 15 to 20 kt, becoming nw 10 to 15 kt after
midnight. gusts up to 25 kt. seas 2 to 4 ft. wave detail: sw 3 ft
at 5 seconds and n 2 ft at 2 seconds. a chance of showers. 
.thu and thu night...nw winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 3 ft. wave detail: n 2 ft at 4 seconds and sw 1 foot at
6 seconds. 
.fri...e winds 5 to 10 kt. seas around 2 ft. 
.fri night...s winds 5 to 10 kt. seas 1 foot or less. a chance of
showers. 
.sat and sat night...e winds 5 to 10 kt, increasing to 10 to
15 kt. seas around 2 ft. showers likely. 

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 182006
cwfbox
expires:202605190900;;785270

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz233-190900-
vineyard sound-
405 pm edt mon may 18 2026

.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: w 3 ft at 5 seconds and e
1 foot at 3 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw 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: w 4 ft
at 5 seconds and e 1 foot at 3 seconds. patchy fog in the morning
with vsby 1 nm or less. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 ft. wave detail: sw 5 ft at 5 seconds and e 1 foot at
8 seconds. patchy fog after midnight with vsby 1 nm or less. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: sw 5 ft at 7 seconds and e 1 foot at
8 seconds. a chance of showers in the afternoon. 
.wed night...w winds 10 to 15 kt with gusts up to 20 kt, becoming
nw after midnight. seas 2 to 4 ft. wave detail: sw 4 ft at
7 seconds and nw 2 ft at 3 seconds. a chance of showers. 
.thu and thu night...nw winds 10 to 15 kt. seas 2 to 3 ft. wave
detail: n 3 ft at 4 seconds and sw 3 ft at 7 seconds. 
.fri...e winds 5 to 10 kt. seas around 2 ft. 
.fri night...s winds 5 to 10 kt. seas around 2 ft. a chance of
showers. 
.sat and sat night...e winds 10 to 15 kt. seas around 2 ft.
showers likely.  

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 182006
cwfbox
expires:202605190900;;785271

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz234-190900-
buzzards bay-
405 pm edt mon may 18 2026

.tonight...sw winds 10 to 15 kt. seas around 2 ft. wave detail: w
2 ft at 3 seconds and s 2 ft at 7 seconds. patchy fog. vsby 1 nm
or less. 
.tue...sw 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: sw
3 ft at 5 seconds and w 1 foot at 2 seconds. patchy fog in the
morning with vsby 1 nm or less. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 4 ft. wave detail: s 3 ft at 6 seconds and se 1 foot at
15 seconds. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: sw 4 ft at 5 seconds and s 2 ft at 8 seconds.
showers likely in the afternoon. 
.wed night...w winds 10 to 15 kt with gusts up to 20 kt, becoming
nw after midnight. seas 2 to 3 ft. wave detail: s 3 ft at
7 seconds and n 2 ft at 2 seconds. a chance of showers in the
evening. 
.thu and thu night...nw winds 5 to 10 kt. seas around 2 ft. wave
detail: n 2 ft at 3 seconds and sw 2 ft at 6 seconds. 
.fri...e winds 5 to 10 kt. seas 1 foot or less. 
.fri night...s winds 5 to 10 kt. seas 1 foot or less. a chance of
showers. 
.sat and sat night...e winds 5 to 10 kt, increasing to 10 to
15 kt. seas around 2 ft. showers likely. 

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 182006
cwfbox
expires:202605190900;;785272

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz235-190900-
rhode island sound-
405 pm edt mon may 18 2026

.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: s 3 ft at 7 seconds and se
2 ft at 8 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: sw 5 ft at 6 seconds and e 1 foot at
3 seconds. patchy fog. vsby 1 nm or less, increasing to 1 to 3 nm
in the afternoon. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
4 to 6 ft. wave detail: se 6 ft at 7 seconds and w 3 ft at
4 seconds. patchy fog. vsby 1 nm or less. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: sw 5 ft at 7 seconds and se 3 ft at 7 seconds.
a chance of showers in the afternoon. 
.wed night...w winds 15 to 20 kt, becoming nw 10 to 15 kt after
midnight. seas 3 to 5 ft. wave detail: s 5 ft at 7 seconds and n
2 ft at 2 seconds. a chance of showers in the evening. 
.thu and thu night...nw winds 10 to 15 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 7 seconds and n 2 ft at 4 seconds. 
.fri...e winds 5 to 10 kt. seas around 2 ft. 
.fri night...s winds 5 to 10 kt. seas around 2 ft. a chance of
showers. 
.sat and sat night...e winds 10 to 15 kt. gusts up to 20 kt. seas
2 to 3 ft. showers likely.  

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 182006
cwfbox
expires:202605190900;;785275

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz236-190900-
narragansett bay-
405 pm edt mon may 18 2026

.tonight...sw winds around 10 kt. waves around 2 ft. patchy fog.
vsby 1 nm or less. 
.tue...sw winds 10 to 15 kt with gusts up to 20 kt. waves 2 to
3 ft. patchy fog in the morning with vsby 1 nm or less. 
.tue night...sw winds 10 to 15 kt with gusts up to 20 kt. waves
2 to 3 ft. 
.wed...sw winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. waves 2 to 3 ft. showers likely in
the afternoon. 
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt in the
evening. waves 2 to 3 ft. a chance of showers in the evening. 
.thu and thu night...nw winds 10 to 15 kt. waves around 2 ft. 
.fri...e winds 5 to 10 kt. waves around 2 ft. 
.fri night...s winds 5 to 10 kt. waves around 2 ft. a chance of
showers. 
.sat and sat night...e winds 5 to 10 kt. waves around 2 ft.
showers likely.  

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 182006
cwfbox
expires:202605190900;;785263

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz250-190900-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
405 pm edt mon may 18 2026

.tonight...s 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.
patchy fog. vsby 1 nm or less. 
.tue...sw winds 10 to 15 kt with gusts up to 20 kt, becoming s
15 to 20 kt with gusts up to 30 kt in the afternoon. seas 2 to
4 ft. wave detail: sw 4 ft at 4 seconds and se 2 ft at 9 seconds.
patchy fog in the morning with vsby 1 to 3 nm. 
.tue night...sw winds 15 to 20 kt with gusts up to 30 kt. seas
3 to 5 ft. wave detail: sw 4 ft at 5 seconds and se 3 ft at
9 seconds. patchy fog after midnight with vsby 1 nm or less. 
.wed...sw winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
4 ft. wave detail: sw 3 ft at 4 seconds and se 2 ft at 9 seconds.
a chance of showers in the afternoon. 
.wed night...w winds 10 to 15 kt, becoming nw after midnight.
gusts up to 20 kt. seas 2 to 4 ft. wave detail: sw 2 ft at
4 seconds and se 2 ft at 9 seconds. a chance of showers in the
evening. 
.thu and thu night...nw 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 n 3 ft at
5 seconds. 
.fri...ne winds 5 to 10 kt. seas around 2 ft. 
.fri night through sat night...e winds 5 to 10 kt. 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 182006
cwfbox
expires:202605190900;;785266

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz254-190900-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
405 pm edt mon may 18 2026

...small craft advisory in effect from tuesday morning through
wednesday evening...

.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 3 ft at 5 seconds and
se 2 ft at 8 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 15 to 20 kt. gusts up to 30 kt in the afternoon.
seas 3 to 5 ft. wave detail: sw 5 ft at 5 seconds and se 2 ft at
9 seconds. patchy fog. vsby 1 nm or less, increasing to 1 to 3 nm
in the afternoon. 
.tue night...sw winds 15 to 20 kt with gusts up to 30 kt. seas
4 to 6 ft. wave detail: sw 5 ft at 5 seconds and se 2 ft at
9 seconds. patchy fog. vsby 1 nm or less. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
6 ft. wave detail: sw 5 ft at 7 seconds and w 2 ft at 4 seconds.
patchy fog in the morning. a chance of showers in the afternoon.
vsby 1 to 3 nm in the morning. 
.wed night...w winds 15 to 20 kt, becoming nw 10 to 15 kt after
midnight. gusts up to 25 kt. seas 3 to 5 ft. wave detail: s 5 ft
at 7 seconds and w 2 ft at 4 seconds. a chance of showers. 
.thu...n winds 10 to 15 kt. gusts up to 20 kt in the morning.
seas 2 to 4 ft. wave detail: s 3 ft at 7 seconds and n 2 ft at
4 seconds. a chance of showers in the morning. 
.thu night...s winds around 5 kt, becoming nw around 5 kt after
midnight. seas 2 to 3 ft. 
.fri...e winds around 5 kt. seas 2 to 3 ft. 
.fri night...s winds 5 to 10 kt. seas around 2 ft. a chance of
showers. 
.sat and sat night...e winds 5 to 10 kt, increasing to 10 to
15 kt. seas 2 to 3 ft. showers likely.  

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 182006
cwfbox
expires:202605190900;;785267

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 pm edt mon may 18 2026

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


anz255-190900-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
405 pm edt mon may 18 2026

...small craft advisory in effect from tuesday morning through
wednesday evening...

.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 4 ft. wave detail: s 3 ft at 7 seconds and nw
2 ft at 4 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft, building to 4 to 6 ft in the afternoon. wave detail: w 4 ft
at 6 seconds and se 2 ft at 9 seconds, becoming w 5 ft at
5 seconds and se 2 ft at 9 seconds. patchy fog. vsby 1 nm or
less. 
.tue night...sw winds around 20 kt with gusts up to 25 kt. seas
5 to 7 ft. wave detail: w 7 ft at 6 seconds and e 1 foot at
10 seconds. patchy fog. vsby 1 nm or less. 
.wed...sw winds around 20 kt with gusts up to 25 kt. seas 5 to
6 ft. wave detail: w 6 ft at 6 seconds and e 1 foot at 9 seconds.
patchy fog in the morning. a chance of showers in the afternoon.
vsby 1 to 3 nm in the morning.
.wed night...w winds 15 to 20 kt with gusts up to 25 kt, becoming
nw 10 to 15 kt after midnight. seas 4 to 6 ft. wave detail: w
6 ft at 6 seconds and n 2 ft at 2 seconds. showers likely. 
.thu...ne winds 10 to 15 kt. gusts up to 20 kt in the morning.
seas 2 to 4 ft. wave detail: sw 4 ft at 7 seconds and n 2 ft at
4 seconds. a chance of showers in the morning. 
.thu night...se winds 5 to 10 kt, becoming w after midnight. seas
2 to 3 ft. 
.fri...e winds 5 to 10 kt. seas around 2 ft. 
.fri night...se winds 5 to 10 kt. seas around 2 ft. a chance of
showers. 
.sat and sat night...e winds 10 to 15 kt. gusts up to 20 kt. seas
2 to 4 ft. showers likely.  

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.

$$