fzus51 kbox 180503
cwfbox
expires:202509181800;;171685

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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


anz231-181800-
cape cod bay-
103 am edt thu sep 18 2025

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

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 180503
cwfbox
expires:202509181800;;171689

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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


anz232-181800-
nantucket sound-
103 am edt thu sep 18 2025

.rest of tonight...e winds 5 to 10 kt. seas around 2 ft. wave
detail: e 2 ft at 7 seconds and s 1 foot at 7 seconds. patchy
fog. a chance of showers with a slight chance of tstms. vsby 1 nm
or less. 
.thu...ne winds 5 to 10 kt, becoming nw in the afternoon. seas
around 2 ft. wave detail: e 2 ft at 7 seconds and s 1 foot at
7 seconds. patchy fog in the morning. a chance of showers in the
morning with vsby 1 nm or less. 
.thu night...sw winds 5 to 10 kt, becoming w 10 to 15 kt after
midnight. seas around 2 ft. wave detail: w 2 ft at 3 seconds and
e 1 foot at 7 seconds. patchy fog after midnight with vsby 1 to
3 nm. 
.fri...nw winds 10 to 15 kt, becoming n in the afternoon. seas
around 2 ft. wave detail: w 2 ft at 3 seconds and e 1 foot at
7 seconds. 
.fri night and sat...ne winds 15 to 20 kt. seas 2 to 3 ft. wave
detail: ne 3 ft at 4 seconds and sw 1 foot at 5 seconds. 
.sat night...e winds 5 to 10 kt. seas around 2 ft. wave detail:
ne 2 ft at 5 seconds. 
.sun through mon night...sw winds 10 to 15 kt. seas around 2 ft. 

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 180503
cwfbox
expires:202509181800;;171690

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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


anz233-181800-
vineyard sound-
103 am edt thu sep 18 2025

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

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 180503
cwfbox
expires:202509181800;;171691

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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


anz234-181800-
buzzards bay-
103 am edt thu sep 18 2025

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

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 180503
cwfbox
expires:202509181800;;171692

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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


anz235-181800-
rhode island sound-
103 am edt thu sep 18 2025

.rest of tonight...ne winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: e 4 ft at 8 seconds and s 1 foot at 7 seconds. patchy
fog. a chance of showers. vsby 1 nm or less. 
.thu...n winds 5 to 10 kt, becoming w in the afternoon. seas 2 to
3 ft. wave detail: s 3 ft at 7 seconds. patchy fog in the
morning. a chance of showers in the morning with vsby 1 nm or
less. 
.thu night...sw winds 5 to 10 kt, becoming w 10 to 15 kt after
midnight. seas 2 to 3 ft. wave detail: se 3 ft at 7 seconds and
sw 2 ft at 4 seconds. 
.fri...w winds around 10 kt. seas 2 to 3 ft. wave detail: w 2 ft
at 4 seconds and se 2 ft at 7 seconds. 
.fri night...n winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. seas 2 to 3 ft. wave detail: ne 3 ft at 5 seconds and w
2 ft at 6 seconds. 
.sat and sat night...se winds 15 to 20 kt. seas 2 to 3 ft. wave
detail: ne 3 ft at 5 seconds and sw 1 foot at 5 seconds. 
.sun through mon night...sw winds 5 to 10 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 180503
cwfbox
expires:202509181800;;171695

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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


anz236-181800-
narragansett bay-
103 am edt thu sep 18 2025

.rest of tonight...ne winds 5 to 10 kt. waves around 2 ft. patchy
fog. a chance of showers with isolated tstms. vsby 1 to 3 nm. 
.thu...n winds 5 to 10 kt, becoming w in the afternoon. waves
around 2 ft. patchy fog in the morning. a chance of showers in
the morning with vsby 1 nm or less. 
.thu night...sw winds 5 to 10 kt. waves around 2 ft. patchy fog
after midnight. 
.fri...nw winds around 10 kt. waves around 2 ft. 
.fri night...n winds 10 to 15 kt. waves around 2 ft. 
.sat and sat night...se winds 10 to 15 kt. waves around 2 ft. 
.sun through mon night...sw winds 5 to 10 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 180503
cwfbox
expires:202509181800;;171683

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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


anz250-181800-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
103 am edt thu sep 18 2025

.rest of tonight...ne winds around 5 kt. seas 2 to 3 ft. wave
detail: se 3 ft at 8 seconds. patchy fog. a chance of showers
with a slight chance of tstms. vsby 1 nm or less. 
.thu...ne winds around 5 kt, becoming n in the afternoon. seas
2 to 3 ft. wave detail: se 3 ft at 8 seconds. patchy fog in the
morning. a chance of showers in the morning with vsby 1 nm or
less. 
.thu night...s winds 5 to 10 kt, becoming w after midnight. seas
2 to 3 ft. wave detail: se 3 ft at 8 seconds and sw 2 ft at
3 seconds. patchy fog after midnight with vsby 1 nm or less. 
.fri...nw winds 10 to 15 kt with gusts up to 20 kt, becoming n in
the afternoon. seas 2 to 3 ft. wave detail: se 3 ft at 8 seconds
and w 2 ft at 3 seconds. 
.fri night and sat...ne winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. wave detail: n 4 ft at 6 seconds and nw 2 ft at
3 seconds. 
.sat night...se winds 5 to 10 kt, becoming s after midnight. seas
2 to 3 ft. wave detail: n 3 ft at 6 seconds. 
.sun through mon night...sw winds 10 to 15 kt with gusts up to
25 kt. seas 2 to 4 ft.  

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 180503
cwfbox
expires:202509181800;;171686

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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


anz254-181800-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
103 am edt thu sep 18 2025

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

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 180503
cwfbox
expires:202509181800;;171687

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
103 am edt thu sep 18 2025

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-
103 am edt thu sep 18 2025

.rest of tonight...se winds 5 to 10 kt. seas 3 to 4 ft. wave
detail: s 4 ft at 7 seconds. patchy fog. showers likely with
isolated tstms. vsby 1 nm or less. 
.thu...e winds around 5 kt, becoming w in the afternoon. seas
2 to 4 ft. wave detail: s 3 ft at 7 seconds. patchy fog in the
morning. a chance of showers in the morning with vsby 1 nm or
less. 
.thu night...w winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. seas 2 to 3 ft. wave detail: se 3 ft at 7 seconds and
sw 2 ft at 5 seconds. patchy fog after midnight with vsby 1 nm or
less. 
.fri...nw winds 10 to 15 kt. seas 2 to 3 ft. wave detail: w 2 ft
at 4 seconds and se 2 ft at 7 seconds. patchy fog in the morning
with vsby 1 nm or less. 
.fri night and sat...ne winds 15 to 20 kt. seas 2 to 4 ft. wave
detail: ne 4 ft at 5 seconds and sw 2 ft at 5 seconds. 
.sat night...e winds 5 to 10 kt. seas 2 to 3 ft. wave detail: ne
3 ft at 5 seconds. 
.sun through mon night...s winds 5 to 10 kt. seas 2 to 4 ft.  

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.

$$