• CLASSIC IWINDSURF
    Classic myiWindsurfClassic Wind & Weather maps and graphs
Hello Guest
 • 

Classic iWindsurf
kiter? see iKitesurf.com
Grab the iWindsurf Mobile App & Sign On to the New iWindsurf Website
Hi guest · Get your free membership now · Log In ·
MA- Cape Cod

Human Forecasts
 > Daily Briefing
 > Forecast Blog

Real-Time Data
 > Dynamic Map
 > Wind Obs Map
 > Radar + Satellite Map
 > Wind Obs Summary

Computer Forecasts
 > Model Tables
 > Wind Vector Fx Map
 > Wind FlowViz Fx Map

More Maps

Other Resources
Wind Graphs
Meteograms

Watches/Warnings
>None Active

New iWindsurf: Select your region for wind observations & forecasts:
North America | Europe | South America | Australia & Oceania | Asia | Africa

fzus51 kbox 230803
cwfbox
expires:202610232100;;039716

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz231-232100-
cape cod bay-
403 am edt fri oct 23 2026

...small craft advisory in effect through this evening...

.today...n winds 20 to 25 kt with gusts up to 30 kt. seas 5 to
7 ft. wave detail: n 7 ft at 6 seconds. 
.tonight...n winds 15 to 20 kt with gusts up to 25 kt,
diminishing to 5 to 10 kt after midnight. seas 3 to 5 ft. wave
detail: n 5 ft at 7 seconds. 
.sat...n winds 5 to 10 kt, becoming nw in the afternoon. seas
2 to 3 ft. wave detail: n 3 ft at 6 seconds. 
.sat night...w winds around 5 kt. seas 2 to 3 ft. wave detail: ne
2 ft at 7 seconds and n 1 foot at 4 seconds. 
.sun and sun night...sw winds 5 to 10 kt. seas around 2 ft. wave
detail: ne 2 ft at 7 seconds and n 1 foot at 3 seconds. 
.mon through tue night...ne winds 15 to 20 kt with gusts up to
25 kt. seas 2 to 4 ft. wave detail: n 3 ft at 4 seconds.  

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 230803
cwfbox
expires:202610232100;;039720

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz232-232100-
nantucket sound-
403 am edt fri oct 23 2026

...small craft advisory in effect through this evening...

.today...n winds 25 to 30 kt, diminishing to 20 to 25 kt this
afternoon. seas 4 to 6 ft. wave detail: n 5 ft at 5 seconds. 
.tonight...n winds 15 to 20 kt with gusts up to 25 kt,
diminishing to around 10 kt after midnight. seas 3 to 5 ft. wave
detail: n 4 ft at 6 seconds. 
.sat...nw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: ne 3 ft
at 10 seconds and n 1 foot at 4 seconds. 
.sat night...nw winds around 5 kt. seas 2 to 3 ft. wave detail: e
3 ft at 13 seconds and nw 1 foot at 7 seconds. 
.sun and sun night...sw winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: e 2 ft at 13 seconds and n 1 foot at 4 seconds. 
.mon through tue night...ne winds 15 to 20 kt with gusts up to
25 kt. seas 2 to 3 ft. wave detail: ne 3 ft at 9 seconds and nw
2 ft at 3 seconds.  

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 230803
cwfbox
expires:202610232100;;039721

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz233-232100-
vineyard sound-
403 am edt fri oct 23 2026

...small craft advisory in effect until 11 am edt this morning...

.today...n winds 20 to 25 kt, diminishing to 15 to 20 kt this
afternoon. gusts up to 30 kt. seas 3 to 4 ft. wave detail: n 4 ft
at 4 seconds. 
.tonight...ne winds 10 to 15 kt with gusts up to 20 kt, becoming
n 5 to 10 kt after midnight. seas 2 to 3 ft. wave detail: n 3 ft
at 5 seconds. 
.sat...n winds 5 to 10 kt, becoming w in the afternoon. seas
1 foot or less. wave detail: n 1 foot at 2 seconds and ne 1 foot
at 6 seconds. 
.sat night...nw winds around 5 kt. seas 1 foot or less. wave
detail: nw 1 foot at 7 seconds and e 1 foot at 13 seconds. 
.sun and sun night...sw winds 5 to 10 kt. seas 1 foot or less.
wave detail: nw 1 foot at 2 seconds and e 1 foot at 14 seconds. 
.mon through tue night...ne winds 15 to 20 kt. seas 2 to 3 ft.
wave detail: nw 2 ft at 4 seconds and ne 2 ft at 9 seconds.  

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 230803
cwfbox
expires:202610232100;;039722

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz234-232100-
buzzards bay-
403 am edt fri oct 23 2026

...small craft advisory in effect until 11 am edt this morning...

.today...n winds 15 to 20 kt with gusts up to 30 kt. seas 2 to
4 ft. wave detail: n 4 ft at 5 seconds. 
.tonight...ne winds 10 to 15 kt with gusts up to 20 kt, becoming
n 5 to 10 kt after midnight. seas 2 to 3 ft in the evening, then
1 foot or less. wave detail: nw 3 ft at 7 seconds and ne 2 ft at
3 seconds, becoming ne 1 foot at 3 seconds and n 1 foot at
6 seconds. 
.sat...n winds 5 to 10 kt, becoming w in the afternoon. seas
1 foot or less. wave detail: n 1 foot at 3 seconds. 
.sat night...nw winds around 5 kt. seas 1 foot or less. wave
detail: nw 1 foot at 2 seconds and e 1 foot at 12 seconds. 
.sun and sun night...sw winds 5 to 10 kt. seas 1 foot or less.
wave detail: e 1 foot at 14 seconds. 
.mon through tue night...ne winds 15 to 20 kt. seas 2 to 3 ft.
wave detail: e 2 ft at 12 seconds and sw 1 foot at 3 seconds.  

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 230803
cwfbox
expires:202610232100;;039723

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz235-232100-
rhode island sound-
403 am edt fri oct 23 2026

...small craft advisory in effect until 11 am edt this morning...

.today...n winds 20 to 25 kt, diminishing to 15 to 20 kt this
afternoon. gusts up to 30 kt. seas 2 to 4 ft. wave detail: n 4 ft
at 5 seconds. 
.tonight...ne winds 10 to 15 kt. gusts up to 20 kt in the
evening. seas 2 to 3 ft. wave detail: n 3 ft at 4 seconds. 
.sat...n winds 5 to 10 kt, becoming w in the afternoon. seas
around 2 ft. wave detail: ne 2 ft at 8 seconds and nw 1 foot at
2 seconds. 
.sat night...nw winds around 5 kt. seas around 2 ft. wave detail:
nw 1 foot at 6 seconds and se 1 foot at 11 seconds. 
.sun and sun night...w winds 5 to 10 kt. seas around 2 ft. wave
detail: sw 1 foot at 2 seconds and se 1 foot at 12 seconds. 
.mon through tue night...ne winds 15 to 20 kt. seas 2 to 3 ft.
wave detail: ne 3 ft at 10 seconds and sw 2 ft at 3 seconds.  

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 230803
cwfbox
expires:202610232100;;039726

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz236-232100-
narragansett bay-
403 am edt fri oct 23 2026

.today...n winds 15 to 20 kt, diminishing to 10 to 15 kt this
afternoon. gusts up to 25 kt. waves 2 to 3 ft.
.tonight...n winds 5 to 10 kt. waves around 2 ft in the evening,
then 1 foot or less. 
.sat...n winds around 5 kt, becoming w around 5 kt in the
afternoon. waves 1 foot or less. 
.sat night...w winds around 5 kt. waves 1 foot or less. 
.sun and sun night...sw winds around 5 kt. waves 1 foot or less. 
.mon through tue night...ne winds 10 to 15 kt with gusts up to
20 kt. waves around 2 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 230803
cwfbox
expires:202610232100;;039714

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz250-232100-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
403 am edt fri oct 23 2026

...small craft advisory in effect through saturday morning...

.today...n winds 20 to 25 kt with gusts up to 30 kt. seas 6 to
9 ft. wave detail: ne 9 ft at 9 seconds and n 6 ft at 7 seconds. 
.tonight...n winds 15 to 20 kt with gusts up to 25 kt,
diminishing to around 10 kt after midnight. seas 5 to 7 ft. wave
detail: ne 7 ft at 9 seconds and nw 3 ft at 6 seconds. 
.sat...n winds 5 to 10 kt, becoming nw in the afternoon. seas
3 to 5 ft. wave detail: ne 5 ft at 11 seconds and n 1 foot at
5 seconds. 
.sat night...w winds around 5 kt. seas 3 to 4 ft. wave detail: e
4 ft at 12 seconds and n 1 foot at 4 seconds. 
.sun and sun night...sw winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: e 3 ft at 13 seconds and s 2 ft at 3 seconds. 
.mon through tue night...ne winds 15 to 20 kt. seas 2 to 4 ft.
wave detail: n 4 ft at 5 seconds.  

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 230803
cwfbox
expires:202610232100;;039717

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz254-232100-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
403 am edt fri oct 23 2026

...small craft advisory in effect through saturday morning...

.today...n winds 20 to 25 kt with gusts up to 30 kt. seas 8 to
11 ft. wave detail: ne 11 ft at 9 seconds and nw 5 ft at
6 seconds. 
.tonight...n winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. gusts up to 25 kt. seas 6 to 9 ft, subsiding to 5 to
7 ft after midnight. wave detail: ne 9 ft at 10 seconds and n
4 ft at 4 seconds, becoming ne 7 ft at 9 seconds and nw 3 ft at
6 seconds. 
.sat...n winds 5 to 10 kt. seas 4 to 6 ft. wave detail: ne 6 ft
at 10 seconds and n 3 ft at 6 seconds. 
.sat night...nw winds around 5 kt. seas 3 to 5 ft. wave detail:
ne 5 ft at 12 seconds and nw 1 foot at 6 seconds. 
.sun and sun night...sw winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: e 4 ft at 13 seconds and n 1 foot at 6 seconds. 
.mon and mon night...sw winds 5 to 10 kt, becoming nw 15 to
20 kt. seas 2 to 3 ft. wave detail: nw 3 ft at 4 seconds and e
3 ft at 11 seconds. 
.tue and tue night...n winds 15 to 20 kt, becoming ne 10 to
15 kt. 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 230803
cwfbox
expires:202610232100;;039718

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
403 am edt fri oct 23 2026

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


anz255-232100-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
403 am edt fri oct 23 2026

...small craft advisory in effect through saturday morning...

.today...n winds 25 to 30 kt, diminishing to 20 to 25 kt this
afternoon. seas 6 to 9 ft, subsiding to 5 to 7 ft this afternoon.
wave detail: ne 8 ft at 9 seconds and n 5 ft at 5 seconds,
becoming ne 7 ft at 10 seconds and nw 4 ft at 5 seconds. 
.tonight...n winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. gusts up to 25 kt. seas 5 to 7 ft, subsiding to 3 to
5 ft after midnight. wave detail: ne 7 ft at 10 seconds and n
3 ft at 5 seconds, becoming ne 5 ft at 10 seconds and n 2 ft at
4 seconds. 
.sat...n winds 5 to 10 kt. seas 3 to 5 ft. wave detail: ne 5 ft
at 10 seconds and n 1 foot at 3 seconds. 
.sat night...nw winds around 5 kt. seas 3 to 5 ft. wave detail: e
5 ft at 13 seconds and nw 1 foot at 10 seconds. 
.sun...n winds around 5 kt, becoming s around 5 kt in the
afternoon. seas 2 to 4 ft. wave detail: e 4 ft at 13 seconds and
n 1 foot at 6 seconds. 
.sun night...sw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: e
3 ft at 12 seconds and nw 1 foot at 2 seconds. 
.mon and mon night...w winds 5 to 10 kt, becoming nw 15 to 20 kt.
seas 2 to 3 ft. 
.tue and tue night...n winds 15 to 20 kt, becoming ne 10 to
15 kt. 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.

$$
© Copyright 2026 WeatherFlow, Inc · Contact Us ·