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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sat apr 25 2026


slz022-024-251500-
saint lawrence river from cape vincent to saint regis
403 am edt sat apr 25 2026

.today...northeast winds 10 to 15 knots. partly sunny through
early afternoon, then becoming mostly cloudy. 
.tonight...northeast winds 5 to 10 knots becoming light and
variable. mostly cloudy. 
.sunday...light and variable winds. sunny.
.sunday night...northeast winds less than 10 knots. mainly clear.
.monday...light and variable winds becoming southeast 5 to
10 knots. mainly clear. 
.tuesday...southeast winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. a chance of showers. 
.wednesday...south winds 10 knots or less. showers likely. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat apr 25 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 29.7 inch low will pass through the lower lakes today 
then slide southeast into the mid atlantic region. a 30.3 inch area 
of high pressure will build in across the lower great lakes tonight 
through monday. a 29.4 inch area of low pressure over the great 
plains monday night, will advance northeast into the upper great 
lakes later monday night into tuesday morning while pushing an 
attendant warm front across the lake before heading northeast to 
james bay tuesday night sending an attendant cold front across the 
lake.


loz062-251500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sat apr 25 2026

.today...east winds to 30 knots becoming northeast. showers.
waves 5 to 8 feet building to 7 to 11 feet. waves occasionally
around 14 feet. 
.tonight...northeast winds 15 to 25 knots diminishing to 10 to
15 knots. a chance of showers early. waves 6 to 9 feet subsiding
to 1 to 3 feet. waves occasionally around 11 feet. 
.sunday...northeast winds 5 to 10 knots becoming east. waves 1 to
3 feet. 
.sunday night...east winds 10 knots or less. waves 1 foot or
less. 
.monday...east winds 5 to 15 knots becoming southeast. waves
2 feet or less. 
.tuesday...southeast winds 5 to 15 knots becoming southwest.
showers likely. waves 1 to 3 feet. 
.wednesday...west winds 5 to 10 knots becoming northwest. a
chance of showers. waves 2 feet or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat apr 25 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 29.7 inch low will pass through the lower lakes today 
then slide southeast into the mid atlantic region. a 30.3 inch area 
of high pressure will build in across the lower great lakes tonight 
through monday. a 29.4 inch area of low pressure over the great 
plains monday night, will advance northeast into the upper great 
lakes later monday night into tuesday morning while pushing an 
attendant warm front across the lake before heading northeast to 
james bay tuesday night sending an attendant cold front across the 
lake.


loz063>065-251500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat apr 25 2026

.today...east winds 15 to 25 knots becoming northeast. showers.
waves 3 to 6 feet building to 5 to 8 feet. waves occasionally
around 10 feet. 
.tonight...east winds 15 to 20 knots diminishing to 5 to
15 knots. showers likely early, then a chance of showers late in
the evening. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.sunday...northeast winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.sunday night...northwest winds less than 10 knots becoming
north. waves 1 foot or less. 
.monday...northeast winds 10 knots or less becoming southeast
10 to 15 knots. waves 2 feet or less. 
.tuesday...southeast winds 15 to 20 knots becoming south. showers
likely. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...south winds 15 to 20 knots becoming west 5 to
15 knots. showers likely. waves 1 to 3 feet. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
343 am edt sat apr 25 2026

for waters beyond five nautical miles of shore on lake erie

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 averaging 30.00 inches will build into the region on 
saturday with an weak trough passing through sunday. high pressure
averaging 30.20 inches will pass north of the great lakes sunday
and monday. a low averaging 29.50 inches will move across the 
northern great lakes region tuesday.


lez061-168-169-251415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
343 am edt sat apr 25 2026

.today...northeast winds 5 to 15 knots becoming north. showers
with a slight chance of thunderstorms early, then a chance of
showers from late morning on. waves 1 to 3 feet. 
.tonight...northeast winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.sunday night...northeast winds 5 to 10 knots becoming east.
waves 2 feet or less. 
.monday...east winds 5 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 5 to
15 knots. showers with a chance of thunderstorms during the day,
then a chance of showers tuesday night. waves 1 to 3 feet. 
.wednesday...west winds 5 to 10 knots becoming northwest. a
chance of showers during the day. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$