FZUS61 KBUF 040203

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

1002 PM EDT Sun May 3 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 29.7 inch low well southeast of Maine will deepen to 

28.8 inches as it tracks to Atlantic Canada through tonight, while a 

30.2 inch high centered over the Tennessee Valley slides east and 

off the Carolina coast. A 29.1 inch low over western Ontario 

Province Monday will then weaken to 29.3 inches as it moves to 

northern Quebec through Tuesday, with its trailing wavy cold front 

slowly crossing the lake Tuesday, then drifting across New England 

through Wednesday.



LOZ062-040900-

Lake Ontario open waters from the Niagara River to Hamlin Beach-

1002 PM EDT Sun May 3 2026



.REST OF TONIGHT...Southwest winds 10 to 15 knots increasing to

15 to 20 knots. A chance of showers late this evening. Waves 2 to

4 feet building to 3 to 5 feet. 

.MONDAY...Southwest winds 15 to 20 knots. Waves 2 to 4 feet. 

.MONDAY NIGHT...Southwest winds 15 to 20 knots. A chance of

showers. Waves 2 to 4 feet building to 3 to 5 feet. 

.TUESDAY...Southwest winds 15 to 20 knots becoming west. A chance

of showers in the morning, then showers likely in the afternoon.

Waves 3 to 5 feet. 

.TUESDAY NIGHT...Northwest winds 5 to 15 knots. Rain. Waves 1 to

3 feet. 

.WEDNESDAY...Northwest winds 5 to 10 knots. Rain during the day.

Waves 1 foot or less. 

.THURSDAY...Northwest winds 10 knots or less becoming west 10 to

15 knots. Waves 2 feet or less. 

.FRIDAY...West winds 5 to 15 knots. Waves 1 to 2 feet. 



$$



LOZ063>065-040900-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

1002 PM EDT Sun May 3 2026



.REST OF TONIGHT...Southwest winds 15 to 20 knots. Showers likely

late this evening, then a chance of showers after midnight. Waves

1 to 2 feet building to 3 to 5 feet. 

.MONDAY...Southwest winds 15 to 20 knots becoming south 10 to

15 knots. A chance of showers early. Waves 2 to 4 feet subsiding

to 1 to 3 feet. 

.MONDAY NIGHT...South winds 10 to 15 knots increasing to 15 to

20 knots. A chance of showers overnight. Waves 1 to 3 feet

building to 2 to 4 feet. 

.TUESDAY...Southwest winds 15 to 20 knots becoming west 10 to

15 knots. A chance of showers in the morning, then showers likely

with a chance of thunderstorms in the afternoon. Waves 2 to

4 feet. 

.TUESDAY NIGHT...West winds 5 to 15 knots becoming northwest.

Rain. Waves 1 to 3 feet. 

.WEDNESDAY...Northwest winds 5 to 15 knots becoming west. Rain

during the day. Waves 1 to 2 feet. 

.THURSDAY...West winds 5 to 15 knots increasing to 15 to

20 knots. Waves 1 to 3 feet building to 2 to 4 feet. 

.FRIDAY...West winds 15 to 20 knots becoming southwest and

diminishing to 5 to 10 knots. Waves 2 to 4 feet building to 3 to

5 feet, then subsiding to 1 to 3 feet. 



Winds and waves higher in and near thunderstorms.



$$



LOZ061-040900-

MAFOR 0403/

ONTARIO WEST 1/2 13520 12510 13520. Waves 2 to 4 feet building to

3 to 5 feet overnight. Waves 2 to 4 feet Monday and Monday

evening. 



ONTARIO EAST 1/2 13520 12510 11500 11400 11410. A chance of

showers late this evening. Waves 1 to 2 feet building to 2 to 4

feet overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet

Monday. Waves 1 to 2 feet Monday evening. 



$$