FZUS61 KBUF 141456 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1055 AM EDT Sat Mar 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 29.5 inch low over the Ottawa Valley this morning will continue east to the Canadian Maritimes by this evening as a 30.4 inch high builds into the central Great Lakes, then across the lake tonight before moving 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, before pushing northeastward across Quebec through the remainder of Monday and Tuesday. This low will sweep a strong cold front across the lake Monday afternoon, with a 30.4 inch high then building across the Great Lakes and Ohio Valley Tuesday. The high will then shift east of the lake Wednesday and reach the East Coast by Wednesday evening. LOZ062-142100- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1055 AM EDT Sat Mar 14 2026 .THIS AFTERNOON...West winds to 30 knots. Waves 10 to 14 feet subsiding to 7 to 10 feet. Waves occasionally around 18 feet. .TONIGHT...Northwest winds 15 to 25 knots becoming east and diminishing to 10 to 15 knots. Snow late. Waves 5 to 8 feet subsiding to 2 feet or less. Waves occasionally around 10 feet. .SUNDAY...East winds 15 to 25 knots. Snow. Waves 2 to 4 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .SUNDAY NIGHT...Southeast winds to 30 knots becoming south. Waves 4 to 7 feet. Waves occasionally around 9 feet. .MONDAY...Southeast winds to 30 knots becoming southwest and increasing to 40 knot gales. Rain showers during the day, then snow and rain showers Monday night. Waves 4 to 7 feet building to 10 to 15 feet. Waves occasionally around 19 feet. .TUESDAY...West gales to 40 knots diminishing to 15 to 25 knots. A chance of snow showers. Waves 12 to 16 feet subsiding to 5 to 8 feet. Waves occasionally around 20 feet. .WEDNESDAY...West winds 15 to 20 knots becoming south 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 2 feet. $$ LOZ063>065-142100- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1055 AM EDT Sat Mar 14 2026 ...GALE WARNING IN EFFECT UNTIL 5 PM EDT... .THIS AFTERNOON...West gales to 35 knots. A chance of snow showers. Waves 13 to 18 feet subsiding to 11 to 15 feet. Waves occasionally around 23 feet. .TONIGHT...West winds to 30 knots becoming east and diminishing to 5 to 10 knots after midnight. Waves 10 to 14 feet subsiding to 1 to 3 feet. Waves occasionally around 18 feet. .SUNDAY...East winds 15 to 25 knots becoming southeast. A chance of snow. Waves 1 to 3 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .SUNDAY NIGHT...Southeast winds to 30 knots increasing to 35 knot gales. Waves 5 to 8 feet building to 7 to 10 feet. Waves occasionally around 13 feet. .MONDAY...Southeast gales to 35 knots becoming southwest to 40 knots. Rain showers during the day, then rain and snow showers Monday night. Waves 7 to 10 feet building to 12 to 16 feet. Waves occasionally around 20 feet. .TUESDAY...West gales to 40 knots becoming northwest and diminishing to 30 knots. A chance of snow showers. Waves 14 to 18 feet subsiding to 8 to 11 feet. Waves occasionally around 23 feet. .WEDNESDAY...West winds 15 to 20 knots becoming south. Waves 3 to 5 feet subsiding to 1 to 3 feet. $$ LOZ061-142100- MAFOR 1415/ ONTARIO WEST 1/2...GALE WARNING IN EFFECT...11650 12640 11710 11800 11200 11227 11230. Waves 10 to 14 feet, and occasionally around 18 feet this afternoon. Waves 6 to 9 feet subsiding to 1 to 3 feet, and occasionally around 11 feet tonight. Waves 2 to 4 feet building to 3 to 5 feet Sunday morning. ONTARIO EAST 1/2...GALE WARNING IN EFFECT...12650 11640 11720 11700 11100 11210 11320. A chance of snow showers late this morning. A chance of snow Sunday morning. Waves 13 to 17 feet subsiding to 11 to 15 feet, and occasionally around 22 feet this afternoon. Waves 10 to 14 feet subsiding to 1 to 3 feet, and occasionally around 18 feet tonight. Waves 2 feet or less building to 2 to 4 feet Sunday morning. $$