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open lake forecast for lake ontario
national weather service buffalo ny
401 am edt sat may 17 2025

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 29.0 inch low over the western great lakes will weaken 
to 29.3 inches this morning as it lifts to areas north of the great 
lakes. this low will then cross southern ontario canada and enter 
into central quebec sunday. the lake will then be on the southern 
periphery of a large 30.6 inch ridge centered over the hudson bay on 
monday. a 29.5 inch low will track from the central plains tuesday 
to the ohio valley by wednesday.


loz062-171500-
lake ontario open waters from the niagara river to hamlin beach-
401 am edt sat may 17 2025

.today...south winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of showers early. showers likely with a chance
of thunderstorms early this afternoon, then a chance of showers
and thunderstorms late. waves 1 to 3 feet building to 3 to
5 feet. 
.tonight...west winds 15 to 20 knots. a chance of showers and
thunderstorms early, then a chance of showers. waves 4 to 7 feet.
waves occasionally around 9 feet. 
.sunday...west winds 15 to 20 knots. waves 3 to 6 feet. 
.sunday night...west winds 15 to 20 knots becoming northwest
10 to 15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.monday...northwest winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.tuesday...north winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.wednesday...northeast winds 15 to 20 knots. showers likely.
waves 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
401 am edt sat may 17 2025

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 29.0 inch low over the western great lakes will weaken 
to 29.3 inches this morning as it lifts to areas north of the great 
lakes. this low will then cross southern ontario canada and enter 
into central quebec sunday. the lake will then be on the southern 
periphery of a large 30.6 inch ridge centered over the hudson bay on 
monday. a 29.5 inch low will track from the central plains tuesday 
to the ohio valley by wednesday.


loz063>065-171500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
401 am edt sat may 17 2025

.today...south winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. a chance of showers this morning,
then showers with thunderstorms likely this afternoon. some
thunderstorms may produce gusty winds this afternoon. waves 1 to
3 feet building to 3 to 5 feet. 
.tonight...west winds 15 to 25 knots becoming southwest. a chance
of showers and thunderstorms early, then a chance of showers from
late evening on. waves 3 to 6 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.sunday...west winds 15 to 20 knots. a chance of showers. waves
3 to 6 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.sunday night...west winds 15 to 20 knots becoming northwest. a
chance of showers in the evening. waves 3 to 6 feet subsiding to
2 to 4 feet. 
.monday...northwest winds 15 to 20 knots becoming north 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...north winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.wednesday...northeast winds 10 to 15 knots becoming east.
showers likely. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
401 am edt sat may 17 2025


slz022-024-171500-
saint lawrence river from cape vincent to saint regis
401 am edt sat may 17 2025

.today...south winds 10 knots or less becoming southwest. showers
likely this morning, then showers with a chance of thunderstorms
this afternoon. 
.tonight...southwest winds 5 to 15 knots. showers likely with a
chance of thunderstorms early, then a chance of showers late in
the evening. showers likely after midnight. 
.sunday...southwest winds 5 to 10 knots becoming northwest.
showers.
.sunday night...northwest winds 5 to 10 knots. showers in the
evening, then a chance of showers overnight. 
.monday...northwest winds 5 to 10 knots. a chance of rain showers
during the day. 
.tuesday...north winds 10 knots or less becoming northeast.
mostly cloudy. 
.wednesday...northeast winds 5 to 10 knots. a chance of showers
during the day, then showers likely wednesday night. 

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 sat may 17 2025

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 push across lake erie west to east this morning
with a trough averaging 29.70 inches lingering through tonight.
this trough weakens to 29.90 inches sunday. a ridge averaging
30.10 inches moves in monday into monday night, followed by low
pressure 29.60 inches for midweek.




lez061-168-169-171415-
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 sat may 17 2025

.today...southwest winds 15 to 25 knots becoming west. a chance
of showers and thunderstorms through early afternoon, then a
slight chance of showers and thunderstorms late. waves 3 to
6 feet building to 4 to 7 feet. waves occasionally around 9 feet.
.tonight...west winds 15 to 25 knots. a slight chance of showers.
waves 5 to 7 feet. waves occasionally around 9 feet. 
.sunday...west winds 15 to 20 knots. waves 4 to 7 feet subsiding
to 3 to 5 feet. waves occasionally around 9 feet. 
.sunday night...west winds 10 to 15 knots becoming northwest.
waves 3 to 5 feet subsiding to 1 to 2 feet. 
.monday...north winds 5 to 15 knots becoming northeast. waves
1 to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. a chance of showers
tuesday night. waves 1 to 3 feet. 
.wednesday...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. showers likely. waves 2 to 4 feet subsiding to 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$