Expires:202507171500;;584631
FZUS61 KBUF 170803
GLFLO 

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Thu Jul 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 29.7 inch low will make its way from Lake Huron to 
Quebec today, and will push an initial cold front across the lake 
today, followed by a secondary cold front this evening. A 30.2 inch 
high will then build from the western Great Lakes to New England 
Friday and Friday night, before drifting off the New England coast 
Saturday. A 29.8 inch low will push east across the Great Lakes 
Saturday night before reaching New England Sunday...with a 30.1 inch 
high then forecast to build across the Great Lakes on Monday.


LOZ063>065-171500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Thu Jul 17 2025

.TODAY...South winds 10 to 15 knots becoming west and increasing
to 30 knots this afternoon. A chance of showers and thunderstorms
this morning, then showers likely with a chance of thunderstorms
early this afternoon. A chance of showers and thunderstorms late.
Some thunderstorms may produce gusty winds early this afternoon.
Waves 1 to 3 feet building to 8 to 11 feet. Waves occasionally
around 14 feet. 
.TONIGHT...West winds to 30 knots becoming north 15 to 25 knots.
Waves 8 to 12 feet subsiding to 3 to 5 feet. Waves occasionally
around 15 feet. 
.FRIDAY...North winds 5 to 15 knots becoming west. Waves 2 to
4 feet subsiding to 1 foot or less. 
.FRIDAY NIGHT...Southwest winds 5 to 10 knots becoming south.
Waves 1 foot or less. 
.SATURDAY...South winds 5 to 15 knots becoming northwest. A
chance of showers during the day, then a chance of showers and
thunderstorms Saturday night. Waves 2 feet or less. 
.SUNDAY...Northwest winds 10 to 15 knots becoming north. A chance
of showers during the day. Waves 2 feet or less. 
.MONDAY...Northeast winds 5 to 10 knots becoming southeast. Waves
2 feet or less. 

Winds and waves higher in and near thunderstorms.

$$