FZUS61 KBUF 072103 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 PM EST Sat Mar 7 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 29.7 inch low will move across southern Quebec with its trailing cold front crossing the lake tonight. A large 30.1 inch high will then move from the lower Ohio Valley to the Mid Atlantic region tomorrow and Monday while ridging north across the lake. A 28.9 inch low will move across James Bay Monday while pressure averages 30.0 inches across the lake Tuesday. A cold front from this low will stall near the Lake Tuesday, lifting northward Wednesday as a 29.5 wave of low pressure ripples along the front, with this wave passing just to the west of the Lake Wednesday night. LOZ062-063-080400- Lake Ontario open waters from the Niagara River to Sodus Bay- 402 PM EST Sat Mar 7 2026 .TONIGHT...Southwest winds 15 to 25 knots becoming west. Rain showers likely with a chance of thunderstorms early, then a chance of rain showers. Patchy fog. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally around 9 feet. .SUNDAY...West winds 15 to 25 knots becoming southwest. Waves 3 to 6 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves 3 to 6 feet. .MONDAY...Southwest winds 15 to 25 knots. Waves 3 to 6 feet. .MONDAY NIGHT...Southwest winds 15 to 20 knots diminishing to 5 to 15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. .TUESDAY...South winds 5 to 10 knots becoming east and increasing to 15 to 25 knots. Rain showers Tuesday night. Waves 2 feet or less building to 3 to 5 feet. .WEDNESDAY...Southeast winds to 30 knots becoming west. Rain showers during the day, then rain showers with snow showers likely Wednesday night. Waves 4 to 7 feet building to 7 to 10 feet. Waves occasionally around 13 feet. .THURSDAY...West gales to 35 knots diminishing to 30 knots. Snow and rain showers likely during the day. Waves 10 to 15 feet subsiding to 9 to 12 feet. Waves occasionally around 19 feet. Winds and waves higher in and near thunderstorms. $$ LOZ064-065-080400- Lake Ontario open waters from Sodus Bay to the Saint Lawrence River- 402 PM EST Sat Mar 7 2026 .TONIGHT...Southwest winds 15 to 20 knots becoming west. Rain showers this evening, then a chance of rain showers after midnight. Areas of fog. Waves 3 to 6 feet. .SUNDAY...West winds 15 to 20 knots becoming southwest. Waves 3 to 6 feet subsiding to 2 to 4 feet. .SUNDAY NIGHT...Southwest winds 15 to 20 knots becoming south. Waves 3 to 6 feet subsiding to 2 to 4 feet. .MONDAY...South winds 15 to 20 knots becoming southwest. Waves 2 to 4 feet. .MONDAY NIGHT...Southwest winds 5 to 15 knots becoming south. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TUESDAY...South winds 5 to 10 knots becoming east and increasing to 15 to 20 knots. Rain showers likely Tuesday night. Waves 1 to 3 feet building to 3 to 5 feet. .WEDNESDAY...Southeast winds to 30 knots becoming southwest. Rain showers during the day, then rain showers with snow showers likely Wednesday night. Waves 3 to 5 feet building to 7 to 10 feet. Waves occasionally around 13 feet. .THURSDAY...West gales to 35 knots diminishing to 30 knots. Snow and rain showers likely during the day, then a chance of snow showers Thursday night. Waves 10 to 15 feet building to 12 to 16 feet, then subsiding to 9 to 12 feet. Waves occasionally around 20 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-080400- MAFOR 0722/ ONTARIO WEST 1/2 12530 14620 11520 11530. A chance of rain showers this evening. Waves 4 to 7 feet subsiding to 3 to 6 feet, and occasionally around 9 feet tonight. Waves 3 to 6 feet Sunday. ONTARIO EAST 1/2 12526 11520 14620 11520. Waves 3 to 6 feet tonight. Waves 3 to 6 feet subsiding to 2 to 4 feet Sunday. $$