fzus51 kbox 210203
cwfbox
expires:202605211500;;376023

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz231-211500-
cape cod bay-
1003 pm edt wed may 20 2026

.overnight...w winds around 10 kt, becoming n. seas around 2 ft,
then 1 foot or less. wave detail: w 1 foot at 3 seconds and e
1 foot at 13 seconds, becoming nw 1 foot at 4 seconds and e
1 foot at 17 seconds. a chance of showers. 
.thu...n 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. a chance of showers in the morning. 
.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 in the morning, then
1 foot or less. wave detail: ne 1 foot at 4 seconds and e 1 foot
at 14 seconds, becoming ne 1 foot at 3 seconds and e 1 foot at
13 seconds. 
.fri night...s winds around 5 kt, becoming sw around 5 kt after
midnight. seas 1 foot or less. wave detail: ne 1 foot at
3 seconds and e 1 foot at 9 seconds. 
.sat...ne winds around 5 kt, becoming e 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...se winds 5 to 10 kt, becoming e 10 to 15 kt with
gusts up to 20 kt after midnight. seas 1 foot or less, then
around 2 ft after midnight. a chance of showers in the evening,
then showers likely after midnight. 
.sun and sun night...e winds 10 to 15 kt with gusts up to 25 kt.
seas 2 to 3 ft. showers likely. 
.mon and mon night...se 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 210203
cwfbox
expires:202605211500;;376027

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz232-211500-
nantucket sound-
1003 pm edt wed may 20 2026

.overnight...w winds around 10 kt, becoming n. seas 2 to 3 ft.
wave detail: w 2 ft at 5 seconds. showers likely with a slight
chance of tstms, then a chance of showers. 
.thu...ne winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. seas around 2 ft. wave detail: ne
2 ft at 4 seconds and se 1 foot at 14 seconds. a chance of
showers in the morning. 
.thu night...se winds around 5 kt, becoming nw after midnight.
seas around 2 ft. wave detail: e 1 foot at 5 seconds and se
1 foot at 14 seconds. 
.fri...ne winds 10 to 15 kt, becoming e 5 to 10 kt in the
afternoon. seas around 2 ft. wave detail: ne 2 ft at 5 seconds
and se 1 foot at 12 seconds.
.fri night...se winds 5 to 10 kt, becoming s after midnight. seas
1 foot or less. wave detail: e 1 foot at 4 seconds and se 1 foot
at 12 seconds. 
.sat...e winds 5 to 10 kt. seas 1 foot or less, then around 2 ft
in the afternoon. wave detail: e 1 foot at 6 seconds and e 1 foot
at 11 seconds, becoming e 1 foot at 3 seconds and e 1 foot at
11 seconds. a chance of showers in the afternoon. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 3 ft. showers likely. 
.sun through mon...s winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. showers likely. 
.mon night...w winds 5 to 10 kt. seas 2 to 3 ft. a chance of
showers.  

winds and seas 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 210203
cwfbox
expires:202605211500;;376028

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz233-211500-
vineyard sound-
1003 pm edt wed may 20 2026

.overnight...w winds around 10 kt, becoming n. seas 2 to 3 ft.
wave detail: sw 3 ft at 7 seconds. a chance of showers. a slight
chance of tstms. 
.thu...ne winds 10 to 15 kt, becoming e 5 to 10 kt in the
afternoon. seas 2 to 3 ft. wave detail: ne 3 ft at 6 seconds. a
chance of showers in the morning. 
.thu night...s winds around 5 kt, becoming nw after midnight.
seas around 2 ft. wave detail: sw 2 ft at 6 seconds and se 1 foot
at 14 seconds. 
.fri...e winds 10 to 15 kt. seas around 2 ft. wave detail: ne
2 ft at 6 seconds and se 1 foot at 14 seconds. 
.fri night...se winds 5 to 10 kt, diminishing to around 5 kt
after midnight. seas around 2 ft in the evening, then 1 foot or
less. wave detail: se 1 foot at 4 seconds, becoming s 1 foot at
5 seconds and se 1 foot at 13 seconds. 
.sat...e winds 5 to 10 kt. seas 1 foot or less, then around 2 ft
in the afternoon. wave detail: e 1 foot at 7 seconds, becoming e
1 foot at 3 seconds. a chance of showers in the afternoon. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 3 ft. showers likely. 
.sun and sun night...e winds 15 to 20 kt, diminishing to 10 to
15 kt. gusts up to 25 kt. seas 2 to 4 ft. showers likely. 
.mon and mon night...s winds 5 to 10 kt, becoming w. seas 2 to
3 ft. a chance of showers.  

winds and seas 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 210203
cwfbox
expires:202605211500;;376029

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz234-211500-
buzzards bay-
1003 pm edt wed may 20 2026

.overnight...w winds around 10 kt, becoming n. seas around 2 ft.
wave detail: sw 2 ft at 6 seconds. a chance of showers. a slight
chance of tstms. 
.thu...ne winds 10 to 15 kt, becoming e 5 to 10 kt in the
afternoon. seas around 2 ft. wave detail: ne 2 ft at 5 seconds. a
chance of showers in the morning. 
.thu night...s winds around 5 kt, becoming nw after midnight.
seas around 2 ft. wave detail: s 1 foot at 6 seconds and se
1 foot at 15 seconds. 
.fri...e winds 10 to 15 kt. seas around 2 ft in the morning, then
1 foot or less. wave detail: ne 1 foot at 6 seconds and se 1 foot
at 15 seconds, becoming e 1 foot at 3 seconds and se 1 foot at
13 seconds. 
.fri night...se winds 5 to 10 kt, becoming s after midnight. seas
1 foot or less. wave detail: se 1 foot at 3 seconds and se 1 foot
at 14 seconds. 
.sat...e winds 5 to 10 kt, becoming se in the afternoon. seas
1 foot or less, then around 2 ft in the afternoon. wave detail: e
1 foot at 6 seconds, becoming se 1 foot at 2 seconds and e 1 foot
at 11 seconds. a chance of showers in the afternoon. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts up to 25 kt after midnight. seas 2 to 3 ft. showers likely.
.sun and sun night...e winds 15 to 20 kt, diminishing to 10 to
15 kt. gusts up to 25 kt. seas 2 to 3 ft. showers likely. 
.mon and mon night...s winds 5 to 10 kt, becoming w. seas around
2 ft. a chance of showers.  

winds and seas 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 210203
cwfbox
expires:202605211500;;376030

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz235-211500-
rhode island sound-
1003 pm edt wed may 20 2026

.overnight...nw winds around 10 kt. seas 2 to 4 ft. wave detail:
sw 4 ft at 7 seconds. a chance of showers. a slight chance of
tstms. 
.thu...ne winds 10 to 15 kt, becoming e in the afternoon. seas
2 to 3 ft. wave detail: ne 3 ft at 7 seconds. a chance of showers
in the morning. 
.thu night...s winds 5 to 10 kt, becoming nw after midnight. seas
2 to 3 ft. wave detail: s 3 ft at 7 seconds. 
.fri...ne winds 10 to 15 kt, becoming e in the afternoon. seas
around 2 ft. wave detail: ne 2 ft at 7 seconds and se 1 foot at
14 seconds. 
.fri night...se winds 5 to 10 kt. seas around 2 ft. wave detail:
se 2 ft at 5 seconds. 
.sat...e winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas 2 to 3 ft. wave detail: se 3 ft at 5 seconds. a
chance of showers in the afternoon. 
.sat night...e winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. seas 3 to 5 ft. showers likely. 
.sun...e winds 20 to 25 kt. seas 4 to 6 ft. showers likely. 
.sun night...e winds 10 to 15 kt with gusts up to 20 kt. seas
3 to 5 ft. showers likely. 
.mon and mon night...s winds 5 to 10 kt, becoming w. seas 2 to
4 ft. a chance of showers.  

winds and seas 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 210203
cwfbox
expires:202605211500;;376033

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz236-211500-
narragansett bay-
1003 pm edt wed may 20 2026

.overnight...nw winds 5 to 10 kt. waves around 2 ft. a chance of
showers. a slight chance of tstms. 
.thu...ne winds around 10 kt, becoming se in the afternoon. waves
around 2 ft. a chance of showers in the morning. 
.thu night...s winds around 5 kt, becoming nw after midnight.
waves around 2 ft. 
.fri...ne winds around 10 kt, becoming se in the afternoon. waves
around 2 ft. 
.fri night...s winds 5 to 10 kt, diminishing to around 5 kt after
midnight. waves around 2 ft in the evening, then 1 foot or less. 
.sat...e winds 5 to 10 kt, becoming se in the afternoon. waves
1 foot or less, then around 2 ft in the afternoon. a chance of
showers in the afternoon. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts up to 25 kt after midnight. waves 2 to 3 ft. showers
likely. 
.sun...e winds 15 to 20 kt with gusts up to 25 kt. waves 2 to
4 ft. showers likely. 
.sun night through mon night...w winds 5 to 10 kt. waves 2 to
3 ft. a chance of showers.  

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 210203
cwfbox
expires:202605211500;;376021

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz250-211500-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
1003 pm edt wed may 20 2026

.overnight...nw winds 10 to 15 kt. gusts up to 20 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 with gusts up to 20 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 5 to 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 5 to 10 kt, becoming w after midnight. seas
around 2 ft. wave detail: e 2 ft at 6 seconds and se 1 foot at
14 seconds. 
.sat...n winds around 5 kt, becoming e around 5 kt in the
afternoon. 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, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. seas 1 foot or less, then
around 2 ft after midnight. a chance of showers. 
.sun and sun night...e winds 10 to 15 kt with gusts up to 25 kt.
seas 2 to 4 ft. showers likely. 
.mon and mon night...e winds 5 to 10 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 kbox 210203
cwfbox
expires:202605211500;;376024

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz254-211500-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
1003 pm edt wed may 20 2026

...small craft advisory in effect until 2 am edt thursday...

.overnight...w winds 10 to 15 kt, becoming n. seas 2 to 4 ft.
wave detail: w 4 ft at 7 seconds. a chance of showers. a slight
chance of tstms. 
.thu...ne winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. seas 2 to 3 ft. wave detail: n
3 ft at 6 seconds and se 1 foot at 14 seconds. a chance of
showers in the morning. 
.thu night...se winds around 5 kt, becoming nw after midnight.
seas 2 to 3 ft. wave detail: e 3 ft at 6 seconds and se 1 foot at
14 seconds. 
.fri...ne winds 5 to 10 kt. seas around 2 ft. wave detail: ne
2 ft at 6 seconds and se 1 foot at 14 seconds. 
.fri night...se winds around 5 kt, becoming sw around 5 kt after
midnight. seas around 2 ft. wave detail: ne 2 ft at 6 seconds and
se 1 foot at 14 seconds. 
.sat...ne winds 5 to 10 kt, becoming e in the afternoon. seas
around 2 ft. wave detail: e 2 ft at 7 seconds and se 1 foot at
13 seconds. 
.sat night...e winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. seas 2 to 4 ft. a chance of showers in the evening,
then showers likely after midnight. 
.sun and sun night...e winds 15 to 20 kt, diminishing to 10 to
15 kt. gusts up to 25 kt. seas 3 to 5 ft. showers likely. 
.mon...s winds around 10 kt. seas 4 to 6 ft. showers likely. 
.mon night...w winds 5 to 10 kt. seas 4 to 6 ft. a chance of
showers.  

winds and seas 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 210203
cwfbox
expires:202605211500;;376025

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 pm edt wed may 20 2026

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


anz255-211500-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
1003 pm edt wed may 20 2026

...small craft advisory in effect until 2 am edt thursday...

.overnight...w winds 10 to 15 kt, becoming nw. seas 3 to 5 ft.
wave detail: sw 5 ft at 7 seconds. a chance of showers with a
slight chance of tstms. 
.thu...ne winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
4 ft. wave detail: ne 4 ft at 7 seconds. a chance of showers. 
.thu night...e winds 5 to 10 kt, becoming ne after midnight. seas
2 to 3 ft. wave detail: se 3 ft at 6 seconds and se 1 foot at
14 seconds. 
.fri...ne winds 10 to 15 kt. seas 2 to 3 ft. wave detail: ne 3 ft
at 7 seconds and se 1 foot at 14 seconds. 
.fri night...e winds 5 to 10 kt. seas around 2 ft. wave detail: e
2 ft at 6 seconds and se 1 foot at 14 seconds. 
.sat...e winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas 2 to 3 ft. wave detail: e 2 ft at 7 seconds and
se 1 foot at 14 seconds. a chance of showers in the afternoon. 
.sat night...e winds 15 to 20 kt, increasing to 20 to 25 kt after
midnight. seas 3 to 5 ft. showers likely. 
.sun through mon...s winds 20 to 25 kt. seas 4 to 6 ft. showers
likely. 
.mon night...w winds 5 to 10 kt. seas 3 to 5 ft. a chance of
showers.  

winds and seas 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.

$$