FZUS61 KBUF 290854 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 454 AM EDT Sat Mar 29 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 frontal boundary will remain stalled out south of Lake Ontario through tonight, before lifting back north across the Lower Great Lakes Sunday and Sunday night as a 29.5 inch low tracks across Lower Michigan. This low will lift northeastward into Quebec on Monday while pushing its trailing cold front across the lake. A 30.5 inch high will then build southeast across the Great Lakes Monday night and Tuesday before moving across northern New England on Wednesday. LOZ062-291515- Lake Ontario open waters from the Niagara River to Hamlin Beach- 454 AM EDT Sat Mar 29 2025 .TODAY...Northeast winds 15 to 25 knots becoming east. Rain showers likely early, then rain showers and freezing rain likely late this morning. Freezing rain and rain this afternoon. Waves 3 to 6 feet. .TONIGHT...East winds 15 to 25 knots. Rain and freezing rain in the evening, then rain showers and freezing rain likely after midnight. Rain showers likely late. Waves 4 to 7 feet. Waves occasionally around 9 feet. .SUNDAY...East winds 15 to 20 knots. Rain showers. Waves 3 to 6 feet. .SUNDAY NIGHT...East winds 15 to 20 knots becoming south 10 to 15 knots. Rain showers with a chance of thunderstorms. Waves 2 to 4 feet. .MONDAY...Southwest winds 15 to 20 knots becoming northwest. Rain showers during the day, then a chance of rain and snow showers Monday night. Waves 2 to 3 feet building to 3 to 5 feet. .TUESDAY...Northwest winds 15 to 20 knots becoming east. Waves 3 to 5 feet subsiding to 1 to 3 feet. .WEDNESDAY...East winds 15 to 25 knots becoming south. Rain showers. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to 5 feet. Waves occasionally around 9 feet. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-291515- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 454 AM EDT Sat Mar 29 2025 .TODAY...Northeast winds 15 to 25 knots. Rain and freezing rain. Waves 3 to 6 feet. .TONIGHT...Northeast winds 15 to 20 knots. Freezing rain and rain in the evening, then freezing rain with rain showers likely after midnight. Waves 3 to 5 feet subsiding to 2 to 4 feet. .SUNDAY...Northeast winds 15 to 20 knots diminishing to 10 to 15 knots. Rain showers and freezing rain. Waves 2 to 4 feet subsiding to 1 to 3 feet. .SUNDAY NIGHT...Northeast winds 10 to 15 knots becoming south 15 to 20 knots. Rain showers with a chance of thunderstorms. Waves 1 to 3 feet building to 2 to 4 feet. .MONDAY...South winds 15 to 20 knots becoming northwest. Rain showers with a chance of thunderstorms during the day, then rain showers likely with a chance of snow showers Monday night. Waves 2 to 4 feet building to 3 to 6 feet. .TUESDAY...Northwest winds 15 to 20 knots becoming northeast 10 to 15 knots. A chance of snow showers during the day. Waves 3 to 6 feet subsiding to 1 to 3 feet. .WEDNESDAY...East winds 15 to 25 knots becoming south to 30 knots. A chance of rain showers during the day, then rain showers Wednesday night. Waves 3 to 6 feet building to 5 to 8 feet. Waves occasionally around 10 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-291515- MAFOR 2909/ ONTARIO WEST 1/2 11120 12126 11226 12236 12220. A chance of light freezing rain overnight. Waves 3 to 6 feet today. Waves 4 to 7 feet, and occasionally around 9 feet tonight. ONTARIO EAST 1/2 11126 12136 13126 12120. A chance of rain showers overnight. Waves 3 to 6 feet today. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. $$ JJR