fzus51 kbox 170805
cwfbox
expires:202604172100;;511116

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz231-172100-
cape cod bay-
405 am edt fri apr 17 2026

.today...nw winds around 5 kt, becoming ne this afternoon. seas
1 foot or less, then around 2 ft this afternoon. wave detail: sw
1 foot at 3 seconds and e 1 foot at 5 seconds, becoming nw 1 foot
at 2 seconds and ne 1 foot at 5 seconds. patchy fog. a chance of
rain, mainly this morning. vsby 1 nm or less. 
.tonight...ne winds 5 to 10 kt. seas 1 foot or less. wave detail:
n 1 foot at 3 seconds and s 1 foot at 8 seconds. patchy fog. vsby
1 to 3 nm. 
.sat...ne winds 5 to 10 kt. seas around 2 ft. wave detail: n
1 foot at 3 seconds and s 1 foot at 8 seconds. patchy fog. vsby
1 to 3 nm in the morning. 
.sat night...ne winds around 5 kt, becoming s after midnight.
seas around 2 ft. wave detail: ne 1 foot at 4 seconds and s
1 foot at 7 seconds. patchy fog in the evening. 
.sun...s winds 5 to 10 kt, becoming sw 10 to 15 kt with gusts up
to 20 kt in the afternoon. seas 2 to 3 ft. wave detail: ne 2 ft
at 5 seconds and sw 2 ft at 5 seconds. a chance of showers in the
morning, then showers likely in the afternoon. 
.sun night...nw winds around 15 kt with gusts up to 20 kt. seas
2 to 3 ft. wave detail: nw 2 ft at 4 seconds and s 1 foot at
6 seconds. showers likely, mainly in the evening. 
.mon through tue night...sw winds 15 to 20 kt. seas 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 170805
cwfbox
expires:202604172100;;511120

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz232-172100-
nantucket sound-
405 am edt fri apr 17 2026

.today...w winds 5 to 10 kt, becoming n this afternoon. seas
around 2 ft. wave detail: nw 2 ft at 7 seconds and se 2 ft at
7 seconds. patchy fog. a chance of rain. vsby 1 nm or less. 
.tonight...ne winds around 10 kt. seas around 2 ft. wave detail:
n 1 foot at 4 seconds and s 1 foot at 7 seconds. patchy fog. vsby
1 nm or less, increasing to 1 to 3 nm after midnight. 
.sat...ne winds 10 to 15 kt. seas around 2 ft. wave detail: n
2 ft at 4 seconds and s 1 foot at 7 seconds. patchy fog. vsby
1 to 3 nm in the morning. 
.sat night...ne winds 5 to 10 kt, becoming s after midnight. seas
around 2 ft. wave detail: e 2 ft at 7 seconds and n 1 foot at
3 seconds. patchy fog in the evening. 
.sun...s winds 10 to 15 kt, becoming sw with gusts up to 20 kt in
the afternoon. seas 2 to 3 ft. wave detail: sw 2 ft at 3 seconds
and s 2 ft at 6 seconds. showers likely in the afternoon. 
.sun night...nw winds 15 to 20 kt. seas 2 to 3 ft. wave detail:
sw 3 ft at 5 seconds and e 2 ft at 7 seconds. showers likely,
mainly in the evening. 
.mon through tue night...sw 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 170805
cwfbox
expires:202604172100;;511121

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz233-172100-
vineyard sound-
405 am edt fri apr 17 2026

.today...w winds 5 to 10 kt, becoming n this afternoon. seas 2 to
3 ft. wave detail: s 3 ft at 7 seconds and w 1 foot at 9 seconds.
patchy fog. a chance of rain, mainly this morning. vsby 1 nm or
less, increasing to 1 to 3 nm this afternoon. 
.tonight...ne winds around 10 kt. seas 2 to 3 ft. wave detail: sw
3 ft at 7 seconds and n 1 foot at 4 seconds. patchy fog. vsby
1 to 3 nm in the evening. 
.sat...ne winds 10 to 15 kt. seas around 2 ft. wave detail: sw
2 ft at 7 seconds and n 1 foot at 4 seconds. patchy fog in the
morning with vsby 1 to 3 nm. 
.sat night...ne winds 5 to 10 kt, becoming se after midnight.
seas around 2 ft. wave detail: ne 1 foot at 3 seconds and s
1 foot at 6 seconds. patchy fog in the evening. 
.sun...s winds 10 to 15 kt, becoming sw 15 to 20 kt in the
afternoon. seas 2 to 3 ft. wave detail: s 3 ft at 5 seconds and e
1 foot at 8 seconds. a chance of showers in the morning, then
showers likely in the afternoon. 
.sun night...nw winds 15 to 20 kt. seas 2 to 3 ft. wave detail:
sw 3 ft at 6 seconds and e 1 foot at 8 seconds. showers likely,
mainly in the evening. 
.mon through tue...nw winds 15 to 20 kt. seas 2 to 3 ft. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 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 170805
cwfbox
expires:202604172100;;511122

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz234-172100-
buzzards bay-
405 am edt fri apr 17 2026

.today...w winds 5 to 10 kt, becoming ne 10 to 15 kt this
afternoon. seas around 2 ft. wave detail: sw 2 ft at 6 seconds
and se 1 foot at 10 seconds. patchy fog. a chance of rain, mainly
this morning. vsby 1 nm or less, increasing to 1 to 3 nm this
afternoon. 
.tonight...ne winds around 10 kt. seas around 2 ft. wave detail:
n 2 ft at 3 seconds and sw 2 ft at 7 seconds. patchy fog. vsby
1 to 3 nm in the evening. 
.sat...ne winds around 10 kt. seas around 2 ft. wave detail: n
1 foot at 4 seconds and sw 1 foot at 7 seconds. patchy fog in the
morning with vsby 1 to 3 nm. 
.sat night...ne winds 5 to 10 kt, becoming se after midnight.
seas around 2 ft in the evening, then 1 foot or less. wave
detail: n 1 foot at 3 seconds and s 1 foot at 6 seconds, becoming
ne 1 foot at 4 seconds and s 1 foot at 6 seconds. patchy fog in
the evening. 
.sun...s winds 10 to 15 kt, becoming sw with gusts up to 20 kt in
the afternoon. seas around 2 ft. wave detail: sw 2 ft at
4 seconds and e 1 foot at 9 seconds. a chance of showers in the
morning, then showers in the afternoon. 
.sun night...nw winds 15 to 20 kt. seas 2 to 3 ft. wave detail: s
3 ft at 5 seconds and nw 2 ft at 4 seconds. showers likely,
mainly in the evening. 
.mon through tue...nw winds 10 to 15 kt with gusts up to 20 kt.
seas around 2 ft. 
.tue night...sw 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 170805
cwfbox
expires:202604172100;;511123

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz235-172100-
rhode island sound-
405 am edt fri apr 17 2026

.today...w winds 5 to 10 kt, becoming n 10 to 15 kt this
afternoon. seas 3 to 4 ft. wave detail: s 4 ft at 7 seconds and
se 2 ft at 11 seconds. patchy fog. a chance of rain. vsby 1 nm or
less. 
.tonight...ne winds 10 to 15 kt. seas 2 to 4 ft. wave detail: s
4 ft at 7 seconds and ne 2 ft at 5 seconds. patchy fog. vsby 1 to
3 nm in the evening. 
.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. patchy fog in the morning
with vsby 1 to 3 nm. 
.sat night...e winds 5 to 10 kt, becoming se after midnight. seas
around 2 ft. wave detail: ne 2 ft at 3 seconds and s 2 ft at
7 seconds. 
.sun and sun night...nw winds 15 to 20 kt. seas 2 to 4 ft. wave
detail: w 3 ft at 4 seconds and se 3 ft at 7 seconds. a chance of
showers in the morning, then showers through the night. 
.mon and mon night...w winds 15 to 20 kt, becoming nw. seas 2 to
4 ft. wave detail: w 3 ft at 4 seconds and s 2 ft at 7 seconds. 
.tue...nw winds 15 to 20 kt. seas around 2 ft. 
.tue night...sw winds 20 to 25 kt. seas 3 to 5 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 170805
cwfbox
expires:202604172100;;511126

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz236-172100-
narragansett bay-
405 am edt fri apr 17 2026

.today...w winds around 5 kt, becoming ne this afternoon. waves
2 to 3 ft. patchy fog. a chance of rain. isolated tstms this
afternoon. vsby 1 to 3 nm. 
.tonight...ne winds 5 to 10 kt. waves 2 to 3 ft. patchy fog. vsby
1 to 3 nm in the evening. 
.sat...ne winds around 10 kt. waves around 2 ft. patchy fog in
the morning with vsby 1 to 3 nm. 
.sat night...e winds 5 to 10 kt, becoming se after midnight.
waves around 2 ft. 
.sun and sun night...nw winds 10 to 15 kt with gusts up to 20 kt.
waves 2 to 3 ft. a chance of showers in the morning, then showers
through the night. 
.mon through tue night...sw winds 10 to 15 kt with gusts up to
20 kt. waves 2 to 3 ft.  

winds and waves higher in and near tstms.

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 170805
cwfbox
expires:202604172100;;511114

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz250-172100-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
405 am edt fri apr 17 2026

.today...nw winds 5 to 10 kt, becoming ne 10 to 15 kt this
afternoon. seas around 2 ft. wave detail: ne 2 ft at 5 seconds
and se 2 ft at 8 seconds. patchy fog. a chance of rain, mainly
this morning. vsby 1 nm or less. 
.tonight...ne winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. seas around 2 ft. wave detail: n 2 ft at 4 seconds and
se 2 ft at 8 seconds. patchy fog. vsby 1 to 3 nm. 
.sat...ne winds 10 to 15 kt. gusts up to 20 kt in the morning.
seas 2 to 3 ft. wave detail: ne 3 ft at 4 seconds and se 2 ft at
8 seconds. patchy fog in the morning with vsby 1 to 3 nm. 
.sat night...e winds 5 to 10 kt, becoming s after midnight. seas
2 to 4 ft. wave detail: e 4 ft at 7 seconds and n 1 foot at
3 seconds. patchy fog in the evening. 
.sun...s winds 10 to 15 kt, becoming sw with gusts up to 20 kt in
the afternoon. seas 3 to 4 ft. wave detail: se 4 ft at 7 seconds
and sw 2 ft at 3 seconds. a chance of showers in the morning,
then showers in the afternoon. 
.sun night...nw winds 15 to 20 kt with gusts up to 25 kt. seas
4 to 5 ft. wave detail: nw 4 ft at 4 seconds and e 3 ft at
8 seconds. showers likely, mainly in the evening. 
.mon and mon night...nw winds 15 to 20 kt. seas 3 to 5 ft. 
.tue and tue night...n winds 10 to 15 kt, becoming s 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 170805
cwfbox
expires:202604172100;;511117

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz254-172100-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
405 am edt fri apr 17 2026

.today...w winds 5 to 10 kt, becoming n this afternoon. seas 2 to
4 ft. wave detail: s 3 ft at 7 seconds and w 1 foot at 3 seconds.
patchy fog. a chance of rain. vsby 1 nm or less. 
.tonight...ne winds around 10 kt. seas 2 to 4 ft. wave detail: s
3 ft at 7 seconds and n 2 ft at 4 seconds. patchy fog. vsby 1 nm
or less, increasing to 1 to 3 nm after midnight. 
.sat...ne winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. seas 2 to 4 ft. wave detail: ne 4 ft at 6 seconds and
s 3 ft at 7 seconds. patchy fog. vsby 1 to 3 nm in the morning. 
.sat night...ne winds 5 to 10 kt, becoming s after midnight. seas
3 to 4 ft. wave detail: e 4 ft at 7 seconds and s 2 ft at
7 seconds. patchy fog in the evening. 
.sun...s winds 10 to 15 kt. gusts up to 20 kt in the afternoon.
seas 3 to 5 ft. wave detail: e 4 ft at 7 seconds and sw 3 ft at
5 seconds. showers likely in the afternoon. 
.sun night...nw winds 15 to 20 kt with gusts up to 25 kt. seas
4 to 5 ft. wave detail: w 3 ft at 4 seconds and s 3 ft at
6 seconds. showers likely, mainly in the evening. 
.mon...nw winds 10 to 15 kt with gusts up to 20 kt. seas 3 to
5 ft. 
.mon night through tue night...sw 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 170805
cwfbox
expires:202604172100;;511118

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt fri apr 17 2026

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


anz255-172100-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
405 am edt fri apr 17 2026

.today...w winds 10 to 15 kt, becoming n 5 to 10 kt this
afternoon. seas 3 to 5 ft. wave detail: s 4 ft at 7 seconds and n
2 ft at 6 seconds. patchy fog. a slight chance of rain this
afternoon. vsby 1 nm or less. 
.tonight...ne winds 10 to 15 kt. seas 3 to 4 ft. wave detail: s
4 ft at 7 seconds and n 1 foot at 3 seconds. patchy fog. a chance
of rain. vsby 1 nm or less, increasing to 1 to 3 nm after
midnight. 
.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. patchy fog in the morning
with vsby 1 to 3 nm. 
.sat night...ne winds 5 to 10 kt, becoming s after midnight. seas
2 to 3 ft. wave detail: e 3 ft at 7 seconds and s 2 ft at
7 seconds. patchy fog in the evening. 
.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 3 ft at 7 seconds. showers likely in the afternoon. 
.sun night...nw winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. seas 4 to 6 ft. wave detail: w 5 ft at 6 seconds
and e 3 ft at 7 seconds. showers likely, mainly in the evening. 
.mon...w winds 15 to 20 kt. seas 4 to 6 ft. 
.mon night and tue...nw winds 15 to 20 kt. seas 2 to 4 ft. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 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.

$$