• 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 ·
ON- Lake Ontario

Human Forecasts
 > Daily Briefing
 > Forecast Blog

Real-Time Data
 > Dynamic Map
 > Wind Obs Summary

Computer Forecasts
 > Model Tables

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

fzus61 kbuf 130202
glflo 
expires:202509130900;;885462

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri sep 12 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 30.3 inch high across quebec and the canadian 
maritimes tonight, will move off the east coast saturday. a weak 
trough of low pressure averaging 29.9 inches will then move into the 
lower great lakes saturday night through sunday. a 30.3 inch high 
will slowly shift across quebec and to new england monday through 
tuesday. the high will drift off the east coast wednesday.


loz062-130900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt fri sep 12 2025

.overnight...southeast winds less than 10 knots. waves
1 foot or less. 
.saturday...light and variable winds. waves 1 foot or less. 
.saturday night...southwest winds 10 knots or less becoming
northwest. waves 1 foot or less. 
.sunday...northwest winds 5 to 10 knots becoming light and
variable. waves 1 foot or less. 
.sunday night...northeast winds 10 knots or less becoming east.
waves 1 foot or less. 
.monday...east winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...east winds 10 knots or less. waves 1 foot or less. 
.wednesday...east winds 10 knots or less becoming southeast.
waves 1 foot or less. 

$$
fzus61 kbuf 130202
glflo 
expires:202509130900;;885463

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri sep 12 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 30.3 inch high across quebec and the canadian 
maritimes tonight, will move off the east coast saturday. a weak 
trough of low pressure averaging 29.9 inches will then move into the 
lower great lakes saturday night through sunday. a 30.3 inch high 
will slowly shift across quebec and to new england monday through 
tuesday. the high will drift off the east coast wednesday.


loz063>065-130900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt fri sep 12 2025

.overnight...southeast winds less than 10 knots becoming
south. waves 1 foot or less. 
.saturday...south winds less than 10 knots becoming west. waves
1 foot or less. 
.saturday night...southwest winds less than 10 knots becoming
northwest. waves 1 foot or less. 
.sunday...northwest winds 10 knots or less. waves 1 foot or less.
.sunday night...northwest winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.monday...northeast winds 10 knots or less becoming east. waves
1 foot or less. 
.tuesday...east winds 10 knots or less. waves 1 foot or less. 
.wednesday...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 

$$
fzus61 kbuf 130202
glfsl 
expires:202509130900;;885465

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm edt fri sep 12 2025


slz022-024-130900-
saint lawrence river from cape vincent to saint regis
1002 pm edt fri sep 12 2025

.overnight...light and variable winds. partly to mostly
cloudy. 
.saturday...light and variable winds. mostly cloudy. 
.saturday night...southwest winds less than 10 knots. a chance of
showers. 
.sunday...light and variable winds. mostly sunny. 
.sunday night...north winds less than 10 knots becoming
northeast. mainly clear. 
.monday...northeast winds less than 10 knots. mainly clear. 
.tuesday...light and variable winds. mainly clear. 
.wednesday...light and variable winds. mainly clear. 

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