FZUS61 KBUF 080802 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 AM 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. LOZ062-081500- Lake Ontario open waters from the Niagara River to Hamlin Beach- 402 AM EDT Wed Jul 8 2026 .TODAY...South winds less than 10 knots. Waves 1 foot or less. .TONIGHT...South winds 5 to 10 knots becoming southwest. Waves 1 foot or less. .THURSDAY...Southwest winds 5 to 10 knots becoming west. Showers likely with scattered thunderstorms in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...Southwest winds 5 to 10 knots becoming west. Showers likely. Waves around 1 foot. .FRIDAY...Northwest winds 10 knots or less becoming north. Showers likely during the day. Waves 1 foot or less. .SATURDAY...Northeast winds 10 knots or less becoming southeast. Waves 1 foot or less. .SUNDAY...East winds 10 knots or less becoming south. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-081500- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 402 AM EDT Wed Jul 8 2026 .TODAY...South winds 10 knots or less becoming northwest. Waves 2 feet or less. .TONIGHT...South winds 10 knots or less becoming southwest. Waves 1 foot or less. .THURSDAY...Southwest winds 5 to 10 knots becoming west. A chance of showers in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...West winds 5 to 10 knots. Showers likely. Waves 1 foot or less. .FRIDAY...Northwest winds 5 to 10 knots becoming north. Showers likely during the day. Waves 1 foot or less. .SATURDAY...Northeast winds 10 knots or less becoming south. Waves 1 foot or less. .SUNDAY...South winds 10 knots or less. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ061-081500- MAFOR 0809/ ONTARIO WEST 1/2 11300 11400 11600 11100 12400 12500. Waves 1 foot or less. ONTARIO EAST 1/2 13400 11700 11500 11400 12500. Waves 2 feet or less. $$