FZUS61 KBUF 102003 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 403 PM EDT Tue Mar 10 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 will ripple along a frontal boundary Wednesday, with this wave passing just to the west of the lake Wednesday afternoon. This low will deepen to 29.4 inches as it moves across southern Quebec Thursday. A 30.2 inch high will move across the Ohio Valley and Mid-Atlantic region Thursday night through Friday. A 29.6 inch surface low will pass across the lake Friday night with a cold front, then shifting east of the lake Saturday. A 30.3 inch surface high will ridge across the lake Saturday night, and move east of the lake Sunday. Meanwhile, a 29.5 inch surface low over the mid Mississippi Valley Sunday morning will track northeastward and deepen to 28.9 inches just to the west of the Lake Monday morning. LOZ062-110300- Lake Ontario open waters from the Niagara River to Hamlin Beach- 403 PM EDT Tue Mar 10 2026 ...GALE WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY MORNING... .TONIGHT...Northeast winds 10 to 15 knots becoming east and increasing to 15 to 25 knots. Rain showers likely early, then a chance of rain showers. Rain showers likely with a chance of thunderstorms late. Waves 1 to 2 feet building to 3 to 6 feet. .WEDNESDAY...East winds 15 to 25 knots becoming south and diminishing to 10 to 15 knots. Rain showers with a chance of thunderstorms. Waves 3 to 6 feet subsiding to 2 to 4 feet. .WEDNESDAY NIGHT...Southwest winds 15 to 20 knots becoming west and increasing to 35 knot gales overnight. Rain showers in the evening, then a chance of rain and snow showers overnight. Waves 2 to 4 feet building to 10 to 14 feet. Waves occasionally around 18 feet. .THURSDAY...West winds to 30 knots. A chance of snow showers in the morning. Waves 9 to 12 feet subsiding to 5 to 8 feet. Waves occasionally around 15 feet. .THURSDAY NIGHT...West winds 15 to 20 knots becoming southwest 10 to 15 knots. Waves 4 to 7 feet subsiding to 2 to 4 feet. Waves occasionally around 9 feet. .FRIDAY...Southeast winds to 30 knots becoming west and increasing to 35 knot gales. Rain and snow during the day, then rain with a chance of snow showers Friday night. Waves 3 to 5 feet building to 10 to 15 feet. Waves occasionally around 19 feet. .SATURDAY...West winds to 30 knots becoming east and diminishing to 15 to 20 knots. A chance of snow showers Saturday night. Waves 10 to 13 feet subsiding to 2 to 4 feet. Waves occasionally around 16 feet. .SUNDAY...Southeast gales to 35 knots becoming southwest and diminishing to 30 knots. Rain showers with snow showers likely. Waves 4 to 7 feet building to 9 to 12 feet. Waves occasionally around 15 feet. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-110300- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 403 PM EDT Tue Mar 10 2026 ...GALE WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY MORNING... .TONIGHT...Northeast winds 15 to 25 knots. A chance of rain showers. Waves 1 to 3 feet building to 3 to 6 feet. .WEDNESDAY...East winds 15 to 20 knots becoming south. Rain showers with a chance of thunderstorms. Waves 3 to 5 feet subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...South winds 15 to 20 knots becoming west and increasing to 35 knot gales overnight. Rain showers with a chance of thunderstorms in the evening, then rain showers with snow showers likely overnight. Waves 1 to 3 feet building to 10 to 15 feet. Waves occasionally around 19 feet. .THURSDAY...West winds to 30 knots. Snow showers likely in the morning. Waves 10 to 15 feet subsiding to 9 to 12 feet. Waves occasionally around 19 feet. .THURSDAY NIGHT...West winds to 30 knots diminishing to 10 to 15 knots overnight. Waves 7 to 10 feet subsiding to 2 to 4 feet. Waves occasionally around 13 feet. .FRIDAY...South winds 15 to 25 knots becoming west and increasing to 40 knot gales. Rain with snow likely. Waves 3 to 5 feet building to 14 to 18 feet. Waves occasionally around 23 feet. .SATURDAY...West gales to 35 knots becoming east and diminishing to 15 to 20 knots. A chance of snow showers Saturday night. Waves 14 to 18 feet subsiding to 2 to 4 feet. Waves occasionally around 23 feet. .SUNDAY...East winds 15 to 25 knots becoming south and increasing to 40 knot gales. Rain showers with snow showers likely. Waves 4 to 7 feet building to 9 to 13 feet. Waves occasionally around 16 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-110300- MAFOR 1021/ ONTARIO WEST 1/2 11110 12120 11220 11236 11226 11216 11316. A chance of thunderstorms Wednesday. Waves 1 to 2 feet building to 3 to 6 feet tonight. Waves 3 to 6 feet subsiding to 2 to 4 feet Wednesday. ONTARIO EAST 1/2 11110 11120 11130 11120 11220 11216 11310 11426. A chance of thunderstorms Wednesday. Waves 1 foot or less building to 3 to 6 feet tonight. Waves 3 to 5 feet subsiding to 1 to 3 feet Wednesday. $$