FZUS61 KBUF 221409 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1009 AM EDT Sun Mar 22 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 wavy cold frontal boundary averaging 29.6 inches will cross the lower Great Lakes today, before sliding off the mid- Atlantic coast tonight. A 30.4 inch high will then build across Lower Michigan Monday, and the mid-Atlantic states Tuesday. A 29.8 inch low tracking across Quebec will then push its associated cold front across the lake on Wednesday, with another 29.6 inch low then developing across the central Great Lakes and or the Ohio Valley Thursday. LOZ062-222100- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1009 AM EDT Sun Mar 22 2026 .THIS AFTERNOON...Southwest winds 5 to 10 knots becoming north. Rain showers, then a chance of rain showers late. Waves 1 to 2 feet. .TONIGHT...Northeast winds 5 to 15 knots. Waves 1 to 3 feet. .MONDAY...North winds 10 to 15 knots becoming northwest. Waves 1 to 3 feet. .MONDAY NIGHT...Northwest winds 15 to 20 knots diminishing to 5 to 15 knots. Waves 1 to 3 feet. .TUESDAY...West winds 5 to 15 knots. Waves 1 foot or less building to 1 to 3 feet. .WEDNESDAY...Southwest winds 10 to 15 knots becoming east 15 to 20 knots. A chance of rain and snow showers Wednesday night. Waves 1 to 3 feet building to 2 to 4 feet. .THURSDAY...Southeast winds 15 to 25 knots becoming northwest. Rain showers likely with a chance of snow showers during the day, then rain showers likely Thursday night. Waves 3 to 5 feet building to 5 to 8 feet. Waves occasionally around 10 feet. $$ LOZ063-064-222100- Lake Ontario open waters from Hamlin Beach to Mexico Bay- 1009 AM EDT Sun Mar 22 2026 .THIS AFTERNOON...Southwest winds 5 to 15 knots becoming north. Rain showers, then a chance of rain showers late. Waves 2 feet or less. .TONIGHT...Northeast winds 15 to 20 knots. Waves 1 to 3 feet building to 3 to 5 feet. .MONDAY...North winds 15 to 20 knots becoming northwest 10 to 15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. .MONDAY NIGHT...Northwest winds 5 to 15 knots becoming north. Waves 1 to 3 feet. .TUESDAY...Northwest winds 5 to 15 knots becoming west. Waves 1 to 3 feet. .WEDNESDAY...West winds 10 to 15 knots becoming east 15 to 20 knots. A chance of rain and snow showers Wednesday night. Waves 1 to 3 feet building to 2 to 4 feet. .THURSDAY...Southeast winds 15 to 25 knots becoming northwest to 30 knots. Rain showers likely with a chance of snow showers during the day, then rain showers likely Thursday night. Waves 3 to 5 feet building to 7 to 10 feet. Waves occasionally around 13 feet. $$ LOZ065-222100- Lake Ontario open waters from Mexico Bay to the Saint Lawrence River- 1009 AM EDT Sun Mar 22 2026 .THIS AFTERNOON...Southwest winds 5 to 15 knots becoming north. Rain showers likely. Waves 2 feet or less. .TONIGHT...North winds 10 to 15 knots becoming northeast 15 to 20 knots. Waves 1 to 3 feet. .MONDAY...North winds 15 to 20 knots becoming northwest 10 to 15 knots. Waves 1 to 3 feet. .MONDAY NIGHT...Northwest winds 5 to 10 knots becoming north. Waves 2 feet or less. .TUESDAY...Northwest winds 5 to 15 knots becoming southwest. Waves 1 to 3 feet. .WEDNESDAY...Southwest winds 10 to 15 knots becoming east 15 to 20 knots. A chance of rain showers during the day, then a chance of rain and snow showers Wednesday night. Waves 1 to 3 feet. .THURSDAY...Southeast winds 15 to 25 knots becoming northwest to 30 knots. Rain and snow showers likely. Waves 2 to 4 feet building to 6 to 9 feet. Waves occasionally around 11 feet.$$ LOZ061-222100- MAFOR 2215/ ONTARIO WEST 1/2 11606 11700 11800 14110 11810. Waves 1 to 3 feet. ONTARIO EAST 1/2 11606 12810 12110 11120 12820. Waves 2 feet or less this afternoon. Waves 1 to 3 feet building to 3 to 5 feet tonight. Waves 3 to 5 feet Monday morning. $$