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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt mon may 4 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 29.1 inch low over western ontario province will 
weaken to 29.3 inches as it moves to northern quebec through 
tuesday. its trailing wavy cold front will slowly cross the lake 
tuesday, then will drift across new england wednesday and out to 
sea thursday. a 30.1 inch high over the tennessee and ohio valleys
will then slide to the mid-atlantic coastline friday.


loz062-042100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt mon may 4 2026

.this afternoon...southwest winds 15 to 20 knots. waves 2 to
4 feet. 
.tonight...southwest winds 15 to 20 knots. a chance of showers
from late evening on. waves 2 to 4 feet building to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely. waves 3 to 5 feet subsiding to 2 to
3 feet. 
.tuesday night...west winds 5 to 10 knots becoming north. showers
likely in the evening, then rain likely overnight. waves 1 to
3 feet. 
.wednesday...north winds 5 to 15 knots becoming northwest. rain
likely during the day. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.friday...west winds 5 to 15 knots. waves 1 to 2 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt mon may 4 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 29.1 inch low over western ontario province will 
weaken to 29.3 inches as it moves to northern quebec through 
tuesday. its trailing wavy cold front will slowly cross the lake 
tuesday, then will drift across new england wednesday and out to 
sea thursday. a 30.1 inch high over the tennessee and ohio valleys
will then slide to the mid-atlantic coastline friday.


loz063>065-042100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt mon may 4 2026

.this afternoon...southwest winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...south winds 5 to 10 knots increasing to 15 to
20 knots. a chance of showers after midnight. waves 1 to 3 feet
building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely in the morning, then showers with a
chance of thunderstorms in the afternoon. waves 2 to 4 feet. 
.tuesday night...west winds 5 to 15 knots becoming northwest.
showers with a chance of thunderstorms in the evening, then rain
overnight. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday...north winds 5 to 10 knots becoming west. rain during
the day, then a chance of showers wednesday night. waves 1 to
2 feet. 
.thursday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.friday...west winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake erie
national weather service cleveland oh
342 pm edt mon may 4 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 cold front will move east across lake erie during the day
tuesday before exiting to the east tuesday evening. high pressure
30.10 inches will slowly build east over the region wednesday and
thursday with low pressure 29.90 inches moving east across the 
great lakes friday and saturday.


lez061-167>169-050215-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 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-
342 pm edt mon may 4 2026

.tonight...southwest winds 15 to 20 knots. a chance of showers
and thunderstorms early, then showers likely with a chance of
thunderstorms late this evening. a chance of showers with a
slight chance of thunderstorms after midnight. waves 2 to 4 feet
building to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots becoming northwest 5 to
15 knots. a chance of showers in the morning, then showers likely
with a slight chance of thunderstorms early in the afternoon.
showers with a chance of thunderstorms late. waves 3 to 5 feet
subsiding to 2 to 3 feet. 
.tuesday night...northwest winds 5 to 10 knots becoming
northeast. showers with a chance of thunderstorms in the evening,
then showers overnight. waves 1 to 3 feet. 
.wednesday...northeast winds 5 to 10 knots becoming north.
showers in the morning, then a chance of showers in the
afternoon. waves 2 feet or less. 
.wednesday night...northwest winds 5 to 10 knots. waves 1 foot or
less. 
.thursday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.friday...west winds 5 to 15 knots becoming southwest. a chance
of showers. waves 1 to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming west. a chance
of showers during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$