fzus51 kbox 180505
cwfbox
expires:202604181800;;561005

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt sat apr 18 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz235-181800-
rhode island sound-
104 am edt sat apr 18 2026

.rest of tonight...ne winds 10 to 15 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 7 seconds and n 1 foot at 4 seconds. areas of
fog. vsby 1 nm or less. 
.sat...ne 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. areas of fog in the morning
with vsby 1 nm or less. 
.sat night...e winds 5 to 10 kt, becoming s after midnight. seas
around 2 ft. wave detail: ne 2 ft at 4 seconds and s 2 ft at
7 seconds. areas of fog in the evening. patchy fog after
midnight. vsby 1 to 3 nm in the evening. 
.sun...s winds 10 to 15 kt, becoming w 15 to 20 kt in the
afternoon. seas 2 to 3 ft. wave detail: se 3 ft at 6 seconds and
w 2 ft at 3 seconds. patchy fog. a chance of rain in the morning,
then rain with snow likely in the afternoon. vsby 1 to 3 nm in
the morning. 
.sun night...nw winds 15 to 20 kt with gusts up to 25 kt. seas
2 to 4 ft. wave detail: w 3 ft at 4 seconds and se 3 ft at
7 seconds. patchy fog in the evening. rain and snow likely in the
evening. 
.mon and mon night...n winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 3 ft. wave detail: w 2 ft at 3 seconds and se 2 ft at
7 seconds. 
.tue...n winds 10 to 15 kt with gusts up to 20 kt. seas around
2 ft. 
.tue night through wed night...nw winds 15 to 20 kt with gusts up
to 25 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 180505
cwfbox
expires:202604181800;;561008

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt sat apr 18 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz236-181800-
narragansett bay-
104 am edt sat apr 18 2026

.rest of tonight...n winds 5 to 10 kt. waves around 2 ft. areas
of fog. vsby 1 nm or less. 
.sat...ne winds around 10 kt. waves around 2 ft. areas of fog in
the morning with vsby 1 nm or less. 
.sat night...e winds 5 to 10 kt, becoming s after midnight. waves
around 2 ft.  with patchy fog. 
.sun...s winds 5 to 10 kt, becoming w 10 to 15 kt with gusts up
to 20 kt in the afternoon. waves around 2 ft. patchy fog. rain.
snow likely in the afternoon. vsby 1 to 3 nm in the morning. 
.sun night...nw winds 10 to 15 kt. gusts up to 20 kt in the
evening. waves 2 to 3 ft. patchy fog in the evening. rain and
snow likely in the evening. 
.mon and mon night...n winds 5 to 10 kt. waves around 2 ft. 
.tue through wed night...nw winds 10 to 15 kt with gusts up to
20 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 180505
cwfbox
expires:202604181800;;561006

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt sat apr 18 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz237-181800-
block island sound-
104 am edt sat apr 18 2026

.rest of tonight...ne winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 7 seconds and nw 1 foot at 4 seconds. areas of
fog. vsby 1 to 3 nm. 
.sat...ne winds around 10 kt. seas 2 to 3 ft. wave detail: s 3 ft
at 7 seconds and ne 2 ft at 4 seconds. areas of fog in the
morning with vsby 1 nm or less. 
.sat night...e winds 5 to 10 kt, becoming se after midnight. seas
around 2 ft. wave detail: ne 2 ft at 4 seconds and s 2 ft at
7 seconds. areas of fog in the evening. patchy fog after
midnight. vsby 1 to 3 nm in the evening. 
.sun...s winds 5 to 10 kt, becoming w 10 to 15 kt with gusts up
to 20 kt in the afternoon. seas 2 to 3 ft. wave detail: w 2 ft at
3 seconds and se 2 ft at 7 seconds. patchy fog. a chance of rain
in the morning, then rain with snow likely in the afternoon. vsby
1 to 3 nm in the morning. 
.sun night...nw winds 10 to 15 kt. gusts up to 20 kt in the
evening. seas 2 to 3 ft. wave detail: w 2 ft at 3 seconds and se
2 ft at 7 seconds. patchy fog in the evening. rain and snow
likely in the evening. 
.mon and mon night...n winds 10 to 15 kt. seas 2 to 3 ft. wave
detail: nw 2 ft at 3 seconds and se 2 ft at 7 seconds. 
.tue through wed night...nw winds 15 to 20 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 180505
cwfbox
expires:202604181800;;561000

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 am edt sat apr 18 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz255-181800-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
104 am edt sat apr 18 2026

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

$$