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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt fri oct 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 30.2 inch high will settle over the lower great lakes 
today, before sliding off the east coast saturday. meanwhile, a 
29.1 inch surface low will track across northwestern ontario into 
hudson bay tonight and saturday while pushing a warm front across 
the lake tonight. a developing 29.5 inch low over the ohio valley 
saturday will strengthen to 29.3 inches as it moves northeast along 
a stationary boundary through the central great lakes saturday night 
and sunday. another 29.5 inch low is then forecast to develop over 
the upper ohio valley sunday night, then move east across the lower 
great lakes into western new england by late monday, while pushing a 
cold front across the lake sunday night.


loz062-171500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt fri oct 17 2025

.today...east winds 10 knots or less becoming northwest. waves
1 foot or less. 
.tonight...south winds 10 knots or less. a chance of showers in
the evening, then showers likely after midnight. a chance of
showers late. waves 1 foot or less. 
.saturday...south winds 5 to 15 knots becoming southeast. a
chance of showers. waves 2 feet or less. 
.saturday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. a chance of showers in the evening, then showers
likely overnight. waves 1 to 3 feet. 
.sunday...south winds 15 to 25 knots becoming southwest to
30 knots. showers. waves 2 to 4 feet building to 7 to 10 feet.
waves occasionally around 13 feet. 
.monday...west winds to 30 knots becoming southwest 15 to
25 knots. showers during the day, then a chance of showers monday
night. waves 9 to 12 feet subsiding to 3 to 5 feet. waves
occasionally around 15 feet. 
.tuesday...southwest winds 15 to 25 knots becoming west to
30 knots. showers. waves 3 to 5 feet building to 6 to 9 feet.
waves occasionally around 11 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt fri oct 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 30.2 inch high will settle over the lower great lakes 
today, before sliding off the east coast saturday. meanwhile, a 
29.1 inch surface low will track across northwestern ontario into 
hudson bay tonight and saturday while pushing a warm front across 
the lake tonight. a developing 29.5 inch low over the ohio valley 
saturday will strengthen to 29.3 inches as it moves northeast along 
a stationary boundary through the central great lakes saturday night 
and sunday. another 29.5 inch low is then forecast to develop over 
the upper ohio valley sunday night, then move east across the lower 
great lakes into western new england by late monday, while pushing a 
cold front across the lake sunday night.


loz063>065-171500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt fri oct 17 2025

.today...northeast winds 10 knots or less becoming northwest.
waves 2 feet or less. 
.tonight...west winds 10 knots or less becoming south. a chance
of showers. waves 1 foot or less. 
.saturday...south winds 10 to 15 knots becoming southeast. a
chance of showers. waves 1 to 3 feet. 
.saturday night...southeast winds 15 to 25 knots becoming south.
a chance of showers. waves 1 to 3 feet building to 3 to 6 feet. 
.sunday...southeast winds to 30 knots becoming south. showers.
waves 5 to 8 feet building to 7 to 10 feet. waves occasionally
around 13 feet. 
.monday...west winds to 30 knots becoming southwest 15 to
25 knots. showers. waves 10 to 13 feet subsiding to 4 to 7 feet.
waves occasionally around 16 feet. 
.tuesday...southwest winds 15 to 25 knots becoming west to
30 knots. showers. waves 3 to 5 feet building to 6 to 10 feet.
waves occasionally around 13 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt fri oct 17 2025


slz022-024-171500-
saint lawrence river from cape vincent to saint regis
402 am edt fri oct 17 2025

.today...northwest winds less than 10 knots becoming west. sunny.
.tonight...southwest winds less than 10 knots. a chance of rain
showers late in the evening. 
.saturday...south winds 10 knots or less. mostly cloudy in the
morning, then becoming partly sunny. 
.saturday night...southeast winds 5 to 15 knots becoming south.
mostly cloudy. 
.sunday...south winds 10 to 15 knots increasing to 15 to
20 knots. showers.
.monday...south winds 5 to 15 knots. showers.
.tuesday...south winds 5 to 10 knots becoming southwest. showers.

$$

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open lake forecast for lake erie
national weather service cleveland oh
347 am edt fri oct 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...
high pressure of 30.20 inches over eastern ohio will will move to
the east coast by tonight. this will allow a warm front to lift 
north across lake erie tonight into saturday. low pressure will 
track out of the mid-mississippi valley and deepen to 29.30 
inches over lower michigan on sunday, pulling a strong cold front 
east across lake erie. a ridge averaging 30.10 inches will build 
into the ohio valley on monday. low pressure of 29.40 inches will
quickly track east across the upper great lakes on tuesday. 


lez061-168-169-171430-
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-
347 am edt fri oct 17 2025

.today...east winds less than 10 knots becoming southwest. a
slight chance of showers late. waves 1 foot or less. 
.tonight...south winds 10 knots or less increasing to 10 to
15 knots. a chance of showers in the evening, then showers likely
after midnight. a chance of showers late. waves 1 to 3 feet. 
.saturday...south winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers. waves 1 to 3 feet. 
.saturday night...south winds 15 to 20 knots. a chance of showers
in the evening, then showers overnight. waves 2 to 4 feet
building to 3 to 5 feet. 
.sunday...southwest gales to 35 knots becoming west and
diminishing to 30 knots. showers. waves 5 to 8 feet building to
9 to 13 feet. waves occasionally around 16 feet. 
.monday...west winds to 30 knots becoming southwest 15 to
25 knots. a chance of showers. waves 7 to 10 feet subsiding to
4 to 7 feet. waves occasionally around 13 feet. 
.tuesday...southwest winds to 30 knots becoming west. showers.
waves 6 to 9 feet building to 8 to 11 feet. waves occasionally
around 14 feet. 

winds and waves higher in and near thunderstorms.

$$