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open lake forecast for lake ontario
national weather service buffalo ny
1008 am edt tue apr 21 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 30.4 inch high across the great lakes will slide off 
the mid-atlantic coast today. a 29.4 inch low over lower hudson bay 
this afternoon will weaken to 29.9 inches by wednesday, while 
pushing a cold front across the lake tonight. a 30.2 inch high will 
then build across the great lakes region wednesday and thursday. a 
warm front will approach the lake by friday. a 29.6 inch low may 
move southwest of the lake on saturday.


loz062-212100-
lake ontario open waters from the niagara river to hamlin beach-
1008 am edt tue apr 21 2026

.this afternoon...south winds 5 to 15 knots becoming east 15 to
20 knots. waves 2 feet or less. 
.tonight...east winds 15 to 20 knots becoming northeast 5 to
15 knots. a chance of rain showers after midnight. waves 1 to
3 feet. 
.wednesday...north winds less than 10 knots. waves 2 feet or
less. 
.wednesday night...west winds less than 10 knots becoming
northwest. waves 1 foot or less. 
.thursday...north winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.friday...east winds 10 to 15 knots increasing to 15 to 20 knots.
a chance of showers friday night. waves 1 to 3 feet building to
3 to 5 feet. 
.saturday...east winds 15 to 20 knots becoming northeast 10 to
15 knots. showers likely. waves 3 to 5 feet. 

$$

fzus61 kbuf 211409
glflo 
expires:202604212100;;747253

open lake forecast for lake ontario
national weather service buffalo ny
1008 am edt tue apr 21 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 30.4 inch high across the great lakes will slide off 
the mid-atlantic coast today. a 29.4 inch low over lower hudson bay 
this afternoon will weaken to 29.9 inches by wednesday, while 
pushing a cold front across the lake tonight. a 30.2 inch high will 
then build across the great lakes region wednesday and thursday. a 
warm front will approach the lake by friday. a 29.6 inch low may 
move southwest of the lake on saturday.


loz063>065-212100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1008 am edt tue apr 21 2026

.this afternoon...south winds 10 to 15 knots becoming southeast
15 to 20 knots. waves 1 to 3 feet. 
.tonight...southeast winds 15 to 25 knots becoming south. a
chance of showers from late evening on. waves 1 to 3 feet
building to 3 to 5 feet, then subsiding to 2 to 4 feet. 
.wednesday...east winds 10 knots or less becoming north. waves
2 feet or less. 
.wednesday night...northwest winds less than 10 knots. waves
1 foot or less. 
.thursday...northwest winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.friday...northeast winds 5 to 15 knots becoming east 15 to
20 knots. a chance of rain showers friday night. waves 2 feet or
less building to 2 to 4 feet. 
.saturday...east winds 15 to 20 knots. showers likely. waves 3 to
5 feet subsiding to 2 to 4 feet. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
922 am edt tue apr 21 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 warm front will cross the lake today and then be pushed back
south tonight into wednesday. high pressure 30.10 inches will
build from the north on wednesday night and remain in the region
through thursday. low pressure 29.50 inches will enter the
northwest great lakes on friday and slowly move southeast,
weakening to 29.70 inches over lake erie on saturday.


lez061-165>169-212015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm 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-
922 am edt tue apr 21 2026

.this afternoon...south winds 15 to 20 knots. waves 2 to 4 feet. 
.tonight...south winds 10 to 15 knots becoming west. a slight
chance of showers early, then a chance of showers with a slight
chance of thunderstorms. a slight chance of showers late. waves
1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.wednesday...northwest winds 10 knots or less becoming west.
waves 2 feet or less. 
.wednesday night...southwest winds less than 10 knots becoming
south. waves 1 foot or less. 
.thursday...east winds 10 knots or less. waves 1 foot or less. 
.friday...east winds 5 to 15 knots becoming northeast. showers
likely friday night. waves 2 feet or less. 
.saturday...northeast winds 5 to 15 knots. a chance of showers
during the day. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$