FZUS61 KBUF 082001 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 401 PM EDT Wed Jul 8 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 broad 30.1 inch high will remain over the lower Great Lakes through Wednesday night while slowly drifting southeast toward the Delmarva. A weak cold front will cross the Lake Thursday night through early Friday, while another 30.1 inch high builds across the upper Great Lakes Friday, then expands across the lower Great Lakes later Friday night through the weekend. LOZ062-090300- Lake Ontario open waters from the Niagara River to Hamlin Beach- 401 PM EDT Wed Jul 8 2026 .TONIGHT...Southeast winds 10 knots or less becoming southwest. Waves 1 foot or less. .THURSDAY...Southwest winds 5 to 10 knots becoming west. A chance of showers and thunderstorms early in the afternoon. Showers likely with a chance of thunderstorms late. Waves 1 foot or less. .THURSDAY NIGHT...West winds 5 to 10 knots. Showers with a chance of thunderstorms in the evening, then showers likely overnight. Waves 1 foot or less. .FRIDAY...Northwest winds less than 10 knots becoming west. Showers likely in the morning. Waves 1 foot or less. .FRIDAY NIGHT...West winds 10 knots or less becoming northeast. Waves 2 feet or less. .SATURDAY...Northeast winds 10 knots or less. Waves 2 feet or less. .SUNDAY...East winds 10 knots or less becoming southwest. Waves 1 foot or less. .MONDAY...Southwest winds 5 to 10 knots. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-090300- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 401 PM EDT Wed Jul 8 2026 .TONIGHT...South winds 10 knots or less becoming southwest. Waves 1 foot or less. .THURSDAY...Southwest winds 5 to 10 knots becoming west. A chance of showers and thunderstorms late. Waves 1 foot or less. .THURSDAY NIGHT...West winds 5 to 10 knots. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 1 foot or less. .FRIDAY...Northwest winds 5 to 10 knots becoming west. Showers likely in the morning. Waves 1 foot or less. .FRIDAY NIGHT...Northwest winds 5 to 10 knots becoming north. Waves 1 foot or less. .SATURDAY...Northeast winds 10 knots or less. Waves 2 feet or less. .SUNDAY...East winds 10 knots or less becoming south. Waves 1 foot or less. .MONDAY...Southwest winds 5 to 10 knots. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LOZ061-090300- MAFOR 0821/ ONTARIO WEST 1/2 11300 11400 14500 11500 11600. A chance of showers Thursday afternoon. Waves 1 foot or less. ONTARIO EAST 1/2 11300 11400 15500. Waves 1 foot or less. $$