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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1004 pm edt sat may 30 2026


slz022-024-310900-
saint lawrence river from cape vincent to saint regis
1004 pm edt sat may 30 2026

.rest of tonight...south winds less than 10 knots becoming
southwest. mainly clear late this evening, then becoming mostly
cloudy. 
.sunday...light and variable winds becoming west 5 to 10 knots. a
chance of showers late. 
.sunday night...northwest winds less than 10 knots. a chance of
showers. 
.monday...north winds less than 10 knots becoming northeast.
mostly sunny. 
.monday night...northeast winds less than 10 knots. mainly clear.
.tuesday...northwest winds less than 10 knots. partly cloudy. 
.wednesday...light and variable winds. mainly clear. 
.thursday...southwest winds 10 knots or less. mainly clear, then
becoming partly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt sat may 30 2026

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 30.2 inch high will remain in control over the entire 
great lakes region through sunday. a 29.8 inch low will push south 
across southern quebec and new england sunday night, then off the 
new england coast on monday, while sending an attendant cold front 
across the lake sunday night. another 30.4 inch high centered over 
hudson bay monday night will then build south across the entire 
great lakes region tuesday and wednesday, then into the ohio valley 
and lower great lakes by thursday.


loz062-310900-
lake ontario open waters from the niagara river to hamlin beach-
1003 pm edt sat may 30 2026

.overnight...west winds 5 to 10 knots. waves 1 foot or
less. 
.sunday...west winds 5 to 15 knots becoming southwest. waves 1 to
2 feet. 
.sunday night...west winds 5 to 15 knots becoming northwest less
than 10 knots. waves 2 feet or less. 
.monday...north winds less than 10 knots becoming east. waves
1 foot or less. 
.monday night...east winds less than 10 knots. waves 1 foot or
less. 
.tuesday...northwest winds 10 knots or less. waves 1 foot or
less. 
.wednesday...northwest winds less than 10 knots becoming west.
waves 1 foot or less. 
.thursday...west winds 5 to 15 knots becoming southwest. waves
1 to 3 feet. 

$$

fzus61 kbuf 310203
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt sat may 30 2026

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 30.2 inch high will remain in control over the entire 
great lakes region through sunday. a 29.8 inch low will push south 
across southern quebec and new england sunday night, then off the 
new england coast on monday, while sending an attendant cold front 
across the lake sunday night. another 30.4 inch high centered over 
hudson bay monday night will then build south across the entire 
great lakes region tuesday and wednesday, then into the ohio valley 
and lower great lakes by thursday.


loz063>065-310900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt sat may 30 2026

.overnight...west winds 5 to 10 knots. waves 1 to 2 feet. 
.sunday...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet. 
.sunday night...west winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...north winds 5 to 10 knots becoming northwest. waves
1 foot or less. 
.monday night...northwest winds 10 knots or less. waves 1 foot or
less. 
.tuesday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.wednesday...west winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots. waves 2 feet or less. 

$$