FZUS61 KBUF 150202 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1002 PM EDT Wed Oct 14 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 30.4 inch high, centered just north of the Great Lakes tonight, will move east across Quebec and New England Thursday through Thursday night. A 29.6 inch low will then move to southern lower Michigan Thursday night before passing over or just north of the lake Friday. This low will deepen to 29.1 inches as it moves from the Saint Lawrence Valley Friday night to the Canadian Maritimes Saturday. A strong and broad 30.6 inch surface high is then forecast to build from the Ohio Valley Saturday night to the Mid Atlantic and southern New England areas by Sunday night, and across southern Atlantic Canada Monday. LOZ062-150900- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1002 PM EDT Wed Oct 14 2026 .OVERNIGHT...North winds 15 to 20 knots becoming northeast 10 to 15 knots. Waves 1 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots becoming east 15 to 20 knots. Waves 2 to 4 feet. .THURSDAY NIGHT...East winds 15 to 20 knots diminishing to 10 to 15 knots. Showers likely in the evening, then showers overnight. Waves 3 to 5 feet subsiding to 2 to 4 feet. .FRIDAY...East winds around 10 knots becoming northwest and increasing to 15 to 25 knots in the afternoon. Showers. Waves 2 to 4 feet building to 3 to 5 feet. .FRIDAY NIGHT...Northwest winds to 30 knots becoming north. A chance of showers in the evening. Waves 4 to 7 feet. Waves occasionally around 9 feet. .SATURDAY...Northwest winds 15 to 25 knots becoming west. Waves 4 to 7 feet subsiding to 3 to 5 feet. Waves occasionally around 9 feet. .SUNDAY...Southwest winds 15 to 20 knots. Waves 3 to 5 feet. .MONDAY...Southwest winds 15 to 20 knots diminishing to 5 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LOZ063>065-150900- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1002 PM EDT Wed Oct 14 2026 .OVERNIGHT...North winds 15 to 20 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .THURSDAY...Northeast winds 15 to 20 knots diminishing to 5 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .THURSDAY NIGHT...East winds 10 to 15 knots becoming southeast and increasing to 15 to 25 knots. A chance of showers in the evening, then showers overnight. Waves 1 to 3 feet building to 3 to 5 feet. .FRIDAY...Southeast winds 15 to 25 knots becoming northwest. Showers. Waves 3 to 6 feet. .FRIDAY NIGHT...Northwest winds to 30 knots becoming north. Showers likely in the evening, then a chance of showers overnight. Waves 5 to 8 feet. Waves occasionally around 10 feet. .SATURDAY...Northwest winds to 30 knots becoming west and diminishing to 15 to 20 knots. Waves 5 to 8 feet subsiding to 3 to 6 feet. Waves occasionally around 10 feet. .SUNDAY...Southwest winds 15 to 20 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet. .MONDAY...Southwest winds 15 to 20 knots diminishing to 5 to 10 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LOZ061-150900- MAFOR 1503/ ONTARIO WEST 1/2 12810 12110 11210 13220. Waves 1 to 3 feet overnight. Waves 2 to 4 feet Thursday. Waves 3 to 5 feet Thursday evening. ONTARIO EAST 1/2 12810 12110 12100 11110 11210. Waves 2 to 4 feet subsiding to 1 to 3 feet overnight and Thursday. Waves 1 to 3 feet Thursday evening. $$