Expires:202507161500;;527561 FZUS61 KBUF 160803 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 AM EDT Wed Jul 16 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 30.1 inch high will slowly drift from eastern New York and Pennsylvania to the Atlantic coastline today. A 29.7 inch low will then track northeastward across the Great Lakes and into Quebec Wednesday night and Thursday, with its trailing cold front pushing across the lake early Friday. A 30.2 inch high will then build from the western Great Lakes to New England Friday through Saturday, then a 29.8 inch low will push east across the Great Lakes Saturday night and Sunday. LOZ061-161500- MAFOR 1609/ ONTARIO WEST 1/2 12500 11600 12300 12400 11500. Waves 1 foot or less. ONTARIO EAST 1/2 12400 11500 12300 13400. A chance of showers and thunderstorms tonight. Waves 1 foot or less. $$