FZUS61 KBUF 271402

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

1002 AM EDT Mon Oct 27 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...An expansive 30.5 inch high will remain anchored 

over Quebec through Wednesday night before slowly weakening. A 

surface low will then approach the lake from the south Thursday 

strengthening to 29.4 inches, the low will then cross the lake 

Thursday night and Friday while continuing to strengthen.



LOZ062-272100-

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

1002 AM EDT Mon Oct 27 2025



.THIS AFTERNOON...East winds 10 to 15 knots. Waves 2 to 3 feet. 

.TONIGHT...East winds 15 to 20 knots. Waves 2 to 4 feet. 

.TUESDAY...East winds 10 to 15 knots increasing to 15 to

25 knots. Waves 3 to 6 feet. 

.TUESDAY NIGHT...East winds 15 to 20 knots. Waves 3 to 6 feet. 

.WEDNESDAY...East winds 15 to 20 knots. A chance of showers

Wednesday night. Waves 3 to 5 feet. 

.THURSDAY...Northeast gales to 35 knots. Showers. Waves 6 to

9 feet building to 8 to 12 feet, then subsiding to 7 to 10 feet.

Waves occasionally around 15 feet. 

.FRIDAY...West gales to 35 knots. Showers. Waves 7 to 10 feet

building to 10 to 13 feet, then subsiding to 6 to 9 feet. Waves

occasionally around 16 feet. 



$$



LOZ063>065-272100-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

1002 AM EDT Mon Oct 27 2025



.THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves 2 feet or

less. 

.TONIGHT...Northeast winds 10 to 15 knots becoming east. Waves

1 to 3 feet building to 2 to 4 feet. 

.TUESDAY...East winds 10 to 15 knots becoming northeast 15 to

20 knots. Waves 2 to 4 feet. 

.TUESDAY NIGHT...Northeast winds 15 to 20 knots becoming east

10 to 15 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet. 

.WEDNESDAY...East winds 10 to 15 knots increasing to 15 to

20 knots. A chance of showers Wednesday night. Waves 2 to 4 feet

building to 3 to 5 feet. 

.THURSDAY...East winds to 30 knots. Showers. Waves 4 to 7 feet

building to 7 to 10 feet. Waves occasionally around 13 feet. 

.FRIDAY...West gales to 35 knots. Showers. Waves 6 to 9 feet

building to 10 to 14 feet. Waves occasionally around 18 feet. 



$$



LOZ061-272100-

MAFOR 2715/

ONTARIO WEST 1/2 13210 13220 11210 11220. Waves 2 to 4 feet. 



ONTARIO EAST 1/2 12100 11110 14210 11210. Waves 2 feet or less

this afternoon. Waves 1 to 3 feet tonight and Tuesday morning. 



$$