• 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 ·
xt_Atl_ME,NH,VT,QC

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

Watches/Warnings
>None Active

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

fzus61 kbuf 280902
glflo 
expires:202512281600;;363202

open lake forecast for lake ontario
national weather service buffalo ny
402 am est sun dec 28 2025

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a ridge of high pressure averaging 30.1 inches will 
weaken over eastern quebec through this evening. low pressure 
averaging 29.1 inches will then cross the lower great lakes tonight, 
before moving to northern new england and southern quebec monday, 
then to the canadian maritimes by tuesday while deepening to 28.8 
inches. a trough averaging 29.6 inches, will drop southward across 
the lake thursday.


loz063-281600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est sun dec 28 2025

...storm warning in effect from monday afternoon through monday
evening...

.today...southeast winds 10 to 15 knots. a chance of rain early
this afternoon. rain late. waves 1 to 3 feet. 
.tonight...southeast winds 15 to 25 knots becoming south. rain.
waves 2 to 4 feet building to 3 to 5 feet. 
.monday...southwest gales to 40 knots increasing to 50 knot
storms in the afternoon. rain and snow showers in the morning,
then snow showers in the afternoon. waves 5 to 8 feet building to
16 to 21 feet. waves occasionally around 27 feet. 
.monday night...west gales to 45 knots. lake effect snow showers.
waves 17 to 22 feet subsiding to 16 to 21 feet. waves
occasionally around 28 feet. 
.tuesday...northwest gales to 40 knots becoming west and
diminishing to 30 knots. lake effect snow showers. waves 14 to
19 feet subsiding to 10 to 14 feet. waves occasionally around
24 feet. 
.wednesday...west winds to 30 knots becoming northwest. lake
effect snow showers. waves 9 to 12 feet subsiding to 6 to 9 feet.
waves occasionally around 15 feet. 
.thursday...west winds 15 to 25 knots. lake effect snow showers.
waves 3 to 6 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 

$$
fzus61 kbuf 280902
glflo 
expires:202512281600;;363203

open lake forecast for lake ontario
national weather service buffalo ny
402 am est sun dec 28 2025

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a ridge of high pressure averaging 30.1 inches will 
weaken over eastern quebec through this evening. low pressure 
averaging 29.1 inches will then cross the lower great lakes tonight, 
before moving to northern new england and southern quebec monday, 
then to the canadian maritimes by tuesday while deepening to 28.8 
inches. a trough averaging 29.6 inches, will drop southward across 
the lake thursday.


loz064-281600-
lake ontario open waters from sodus bay to mexico bay-
402 am est sun dec 28 2025

...storm warning in effect from monday afternoon through monday
evening...

.today...southeast winds 10 to 15 knots. rain likely late. waves
1 to 3 feet. 
.tonight...southeast winds 15 to 25 knots becoming south. rain.
waves 1 to 3 feet building to 3 to 5 feet. 
.monday...south winds to 30 knots becoming southwest and
increasing to 45 knot gales in the afternoon. rain and snow
showers. waves 3 to 6 feet building to 15 to 20 feet. waves
occasionally around 26 feet. 
.monday night...southwest storm force winds to 50 knots becoming
west and diminishing to 45 knot gales overnight. lake effect snow
showers. waves 17 to 22 feet building to 18 to 23 feet, then
subsiding to 17 to 22 feet. waves occasionally around 29 feet. 
.tuesday...northwest gales to 40 knots becoming west and
diminishing to 30 knots. lake effect snow showers. waves 14 to
19 feet subsiding to 10 to 14 feet. waves occasionally around
24 feet. 
.wednesday...west winds to 30 knots becoming northwest. lake
effect snow showers. waves 9 to 13 feet subsiding to 6 to 9 feet.
waves occasionally around 16 feet. 
.thursday...northwest winds 15 to 20 knots becoming west. lake
effect snow showers. waves 3 to 6 feet building to 4 to 7 feet.
waves occasionally around 9 feet. 

$$
fzus61 kbuf 280902
glflo 
expires:202512281600;;363204

open lake forecast for lake ontario
national weather service buffalo ny
402 am est sun dec 28 2025

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a ridge of high pressure averaging 30.1 inches will 
weaken over eastern quebec through this evening. low pressure 
averaging 29.1 inches will then cross the lower great lakes tonight, 
before moving to northern new england and southern quebec monday, 
then to the canadian maritimes by tuesday while deepening to 28.8 
inches. a trough averaging 29.6 inches, will drop southward across 
the lake thursday.


loz065-281600-
lake ontario open waters from mexico bay to the saint lawrence
river-
402 am est sun dec 28 2025

...storm warning in effect from monday afternoon through monday
evening...

.today...southeast winds 10 to 15 knots. a chance of rain late.
waves 2 feet or less. 
.tonight...southeast winds 10 to 15 knots increasing to 15 to
25 knots. rain. waves 2 feet or less building to 3 to 5 feet. 
.monday...south winds to 30 knots becoming southwest and
increasing to 45 knot gales in the afternoon. rain and snow
showers in the morning, then snow and rain showers in the
afternoon. waves 3 to 6 feet building to 15 to 19 feet. waves
occasionally around 24 feet. 
.monday night...southwest storm force winds to 50 knots becoming
west and diminishing to 45 knot gales overnight. lake effect snow
showers. waves 15 to 20 feet building to 16 to 21 feet, then
subsiding to 15 to 19 feet. waves occasionally around 27 feet. 
.tuesday...west gales to 40 knots diminishing to 30 knots. lake
effect snow showers. waves 12 to 17 feet subsiding to 8 to
11 feet. waves occasionally around 22 feet. 
.wednesday...west winds to 30 knots becoming northwest 15 to
25 knots. lake effect snow showers. waves 7 to 10 feet building
to 9 to 12 feet, then subsiding to 5 to 8 feet. waves
occasionally around 15 feet. 
.thursday...northwest winds 15 to 20 knots becoming west. lake
effect snow showers likely. waves 3 to 5 feet building to 3 to
6 feet. 

$$
fzus61 kbuf 280902
glfsl 
expires:202512281600;;363199

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est sun dec 28 2025


slz022-281600-
saint lawrence river from cape vincent to ogdensburg-
402 am est sun dec 28 2025

.today...light and variable winds. a chance of freezing rain
late. 
.tonight...northeast winds 10 knots or less becoming east 10 to
15 knots. freezing rain in the evening, then freezing rain and
rain after midnight. 
.monday...southeast winds 15 to 25 knots becoming southwest to
30 knots. rain showers, snow showers and freezing rain in the
morning, then snow and rain showers in the afternoon. 
.monday night...southwest winds to 30 knots becoming west 15 to
25 knots. lake effect snow showers. 
.tuesday...west winds 15 to 25 knots diminishing to 5 to
10 knots. snow showers during the day, then a chance of snow
showers tuesday night. 
.wednesday...southwest winds 5 to 10 knots becoming west. lake
effect snow showers. 
.thursday...west winds 10 knots or less becoming southwest. a
chance of snow showers. 

$$
fzus61 kbuf 280902
glfsl 
expires:202512281600;;363200

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est sun dec 28 2025


slz024-281600-
saint lawrence river from ogdensburg to saint regis-
402 am est sun dec 28 2025

.today...light and variable winds. partly sunny this morning,
then becoming mostly cloudy. 
.tonight...northeast winds 5 to 15 knots. a chance of freezing
rain early, then freezing rain from late evening on. 
.monday...east winds 15 to 20 knots becoming southwest and
increasing to 30 knots. rain showers and freezing rain in the
morning, then rain showers with snow showers and freezing rain
likely in the afternoon. 
.monday night...southwest winds to 30 knots becoming west. lake
effect snow showers with freezing lake effect rain likely in the
evening, then lake effect snow showers overnight. 
.tuesday...west winds to 30 knots diminishing to 10 to 15 knots.
snow showers during the day, then a chance of snow showers
tuesday night. 
.wednesday...southwest winds 5 to 10 knots becoming west. lake
effect snow showers likely. 
.thursday...southwest winds 5 to 10 knots. a chance of snow
showers. 

$$
© Copyright 2025 WeatherFlow, Inc · Contact Us ·