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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon jul 20 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 30.0 inch area of high pressure will build across the great lakes 
today, followed by a warm front crossing the lake tonight and 
another cold front tuesday night, with these fronts attached to a 
29.4 inch area of low pressure near james bay. a secondary cold 
front will cross the lake wednesday, with a 30.1 inch high building 
across the lower great lakes region wednesday night through friday.


loz062-201500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon jul 20 2026

.today...light and variable winds becoming east 5 to 10 knots.
waves 1 foot or less. 
.tonight...southeast winds 5 to 15 knots becoming south. waves
2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming southwest. showers
with a chance of thunderstorms. waves 1 to 3 feet building to
3 to 5 feet, then subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming west.
showers with a chance of thunderstorms in the evening, then a
chance of showers overnight. waves 2 to 4 feet building to 3 to
6 feet. 
.wednesday...west winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. waves 4 to 7 feet subsiding to
2 to 4 feet. waves occasionally around 9 feet. 
.thursday...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.friday...southwest winds 10 knots or less. waves 1 foot or less.

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 200803
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon jul 20 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 30.0 inch area of high pressure will build across the great lakes 
today, followed by a warm front crossing the lake tonight and 
another cold front tuesday night, with these fronts attached to a 
29.4 inch area of low pressure near james bay. a secondary cold 
front will cross the lake wednesday, with a 30.1 inch high building 
across the lower great lakes region wednesday night through friday.


loz063>065-201500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon jul 20 2026

.today...west winds 10 knots or less becoming east. waves 1 foot
or less. 
.tonight...east winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 foot or less building to 2 to 4 feet. 
.tuesday...south winds 15 to 20 knots. showers with a chance of
thunderstorms. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 10 to 15 knots becoming west
15 to 20 knots. showers with a chance of thunderstorms. waves
1 to 3 feet building to 3 to 6 feet. 
.wednesday...west winds 15 to 25 knots. showers likely during the
day. waves 5 to 8 feet subsiding to 3 to 5 feet. waves
occasionally around 10 feet. 
.thursday...west winds 5 to 15 knots becoming southwest. waves
1 to 3 feet subsiding to 1 foot or less. 
.friday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake erie
national weather service cleveland oh
341 am edt mon jul 20 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...
high pressure 30.00 inches will drift east away from the region
by this evening, allowing a warm front to lift across the lake
late tonight into early tuesday. a cold front will move southeast
across the area tuesday afternoon into tuesday night with a trough
averaging 29.80 inches lingering over the eastern great lakes
through wednesday. high pressure 30.10 inches will build east
thursday and friday.


lez061-168-169-201415-
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-
341 am edt mon jul 20 2026

.today...southwest winds 10 knots or less becoming west. patchy
smoke. waves 1 foot or less. 
.tonight...south winds 10 knots or less increasing to 15 to
20 knots. patchy smoke early. waves 1 to 3 feet. 
.tuesday...southwest winds 15 to 25 knots. showers likely with a
chance of thunderstorms. waves 3 to 6 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.tuesday night...west winds 15 to 20 knots becoming northwest.
showers likely with a chance of thunderstorms in the evening,
then showers likely overnight. waves 3 to 6 feet. 
.wednesday...northwest winds 15 to 20 knots diminishing to 5 to
10 knots. a chance of showers during the day. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.thursday...northwest winds 10 knots or less becoming south.
waves 2 feet or less. 
.friday...south winds less than 10 knots becoming southeast.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$