


Great Lakes Forecast
Issued by NWS
Issued by NWS
934 FZUS61 KBUF 080202 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1002 PM EDT Tue Oct 7 2025 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 30.4 inch high will build from the upper Great Lakes Wednesday to New York State Thursday. The high will then drift off the New England coastline Friday, where it will linger through Saturday. LOZ062-080900- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1002 PM EDT Tue Oct 7 2025 .OVERNIGHT...Northwest winds 15 to 20 knots becoming north. Showers. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 20 knots. Waves 3 to 5 feet. .WEDNESDAY NIGHT...North winds 15 to 20 knots becoming northeast. Waves 3 to 5 feet. .THURSDAY...Northeast winds 5 to 15 knots becoming east less than 10 knots. Waves 2 to 4 feet subsiding to 2 feet or less. .THURSDAY NIGHT...East winds 10 knots or less becoming south. Waves 1 foot or less. .FRIDAY...South winds 10 knots or less. Waves 1 foot or less. .SATURDAY...South winds 10 knots or less becoming east. Waves 1 foot or less. .SUNDAY...East winds 5 to 10 knots. Waves 2 feet or less. $$ LOZ063>065-080900- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1002 PM EDT Tue Oct 7 2025 .OVERNIGHT...Northwest winds 15 to 20 knots becoming north. Showers, then a chance of showers late. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 20 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet. .WEDNESDAY NIGHT...North winds 15 to 20 knots. Waves 3 to 6 feet. .THURSDAY...Northeast winds 15 to 20 knots becoming north 5 to 15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. .THURSDAY NIGHT...Northeast winds 10 knots or less becoming south. Waves 1 foot or less. .FRIDAY...South winds 5 to 10 knots. Waves 2 feet or less. .SATURDAY...South winds 10 knots or less becoming southeast. Waves 1 foot or less. .SUNDAY...East winds 5 to 10 knots. Waves 2 feet or less. $$ LOZ061-080900- MAFOR 0803/ ONTARIO WEST 1/2 11726 11720 15820. Waves 2 to 4 feet overnight. Waves 3 to 5 feet Wednesday and Wednesday evening. ONTARIO EAST 1/2 11826 15820 11820. Waves 2 to 4 feet overnight. Waves 3 to 5 feet subsiding to 2 to 4 feet Wednesday. Waves 3 to 5 feet Wednesday evening. $$