FZUS61 KBUF 142010 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 409 PM EDT Tue Apr 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 29.6 inch low just to the north of New England will continue to weaken as it slides eastward. A 29.6 inch low will move into the central Great Lakes Wednesday night before reaching southern Quebec Thursday night, then drifting off the New England coast by Friday night. A 30.0 inch high is then forecast to build from the central Great Lakes Friday to the lower Great Lakes Saturday morning, then off the east coast Saturday night. A 29.3 inch surface low to the north of Lake Superior Saturday will deepen to 28.9 inches by Sunday...with a trailing cold front crossing the Lake Saturday night. LOZ062-150300- Lake Ontario open waters from the Niagara River to Hamlin Beach- 409 PM EDT Tue Apr 14 2026 .TONIGHT...West winds 15 to 20 knots becoming southeast 5 to 15 knots. Showers with a chance of thunderstorms late. Waves 2 to 4 feet subsiding to 1 to 2 feet. .WEDNESDAY...Southeast winds 10 to 15 knots becoming southwest. Showers with a chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Waves 1 to 3 feet. .WEDNESDAY NIGHT...South winds 10 to 15 knots becoming southwest. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 1 to 2 feet. .THURSDAY...Southwest winds 10 to 15 knots. Showers likely in the morning, then showers likely with a chance of thunderstorms in the afternoon. Waves 1 to 3 feet. .THURSDAY NIGHT...Southwest winds 10 to 15 knots becoming west. Showers likely with a chance of thunderstorms in the evening, then a chance of showers overnight. Waves 1 to 3 feet. .FRIDAY...Northwest winds 5 to 10 knots becoming southeast. A chance of showers during the day. Waves 1 foot or less. .SATURDAY...Southeast winds 5 to 15 knots becoming southwest and increasing to 15 to 25 knots. Showers likely. Waves 2 feet or less building to 4 to 7 feet. Waves occasionally around 9 feet. .SUNDAY...West winds to 30 knots. A chance of rain showers. Waves 5 to 9 feet building to 7 to 10 feet. Waves occasionally around 13 feet. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-150300- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 409 PM EDT Tue Apr 14 2026 .TONIGHT...West winds 15 to 20 knots becoming southeast 5 to 15 knots. A chance of showers and thunderstorms late. Waves 2 to 4 feet subsiding to 1 to 3 feet. .WEDNESDAY...Southeast winds 5 to 10 knots becoming west. Showers with a chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Waves 2 feet or less. .WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 1 to 2 feet. .THURSDAY...Southwest winds around 10 knots. Showers likely in the morning, then showers likely with a chance of thunderstorms in the afternoon. Waves 1 to 2 feet. .THURSDAY NIGHT...Southwest winds 5 to 10 knots becoming west. Showers likely with a chance of thunderstorms in the evening, then showers likely overnight. Waves 1 to 2 feet. .FRIDAY...Northwest winds 5 to 10 knots becoming northeast. A chance of showers. Waves 1 foot or less. .SATURDAY...Southeast winds 5 to 15 knots becoming southwest and increasing to 15 to 25 knots. A chance of showers during the day, then showers likely Saturday night. Waves 2 feet or less building to 4 to 7 feet. Waves occasionally around 9 feet. .SUNDAY...Southwest winds to 30 knots becoming west. Rain showers likely during the day, then a chance of rain and snow showers Sunday night. Waves 6 to 10 feet building to 9 to 12 feet. Waves occasionally around 15 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-150300- MAFOR 1421/ ONTARIO WEST 1/2 11620 11610 11200 11300 11316 11410 12610. A chance of thunderstorms overnight and Wednesday morning. Waves 2 to 4 feet subsiding to 1 to 2 feet tonight. Waves 1 to 3 feet Wednesday. ONTARIO EAST 1/2 12610 11700 11200 11306 11406 11500 11600. A chance of thunderstorms early this evening. A chance of thunderstorms overnight. A chance of thunderstorms Wednesday. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight. Waves 2 feet or less Wednesday. $$