Great Lakes Forecast
Issued by NWS
Issued by NWS
525 FZUS61 KBUF 212102 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 PM EST Fri Nov 21 2025 SLZ022-220400- Saint Lawrence River from Cape Vincent to Ogdensburg- 402 PM EST Fri Nov 21 2025 .TONIGHT...West winds 10 knots or less. Partly cloudy. .SATURDAY...Northwest winds 10 knots or less. Partly sunny. .SATURDAY NIGHT...Northwest winds less than 10 knots. Partly cloudy in the evening, then becoming mostly cloudy. .SUNDAY...South winds 5 to 10 knots becoming southwest. Snow and rain. .SUNDAY NIGHT...West winds 10 knots or less. Rain likely in the evening, then a chance of rain overnight. .MONDAY...West winds 10 knots or less becoming south. Partly to mostly cloudy. .TUESDAY...South winds 5 to 10 knots. Rain. .WEDNESDAY...South winds 5 to 15 knots becoming southwest. Rain showers likely. $$ SLZ024-220400- Saint Lawrence River from Ogdensburg to Saint Regis- 402 PM EST Fri Nov 21 2025 .TONIGHT...West winds 10 knots or less becoming southwest. Mostly cloudy. .SATURDAY...West winds 5 to 10 knots becoming northwest. Partly to mostly sunny. .SATURDAY NIGHT...West winds 10 knots or less becoming southwest. Partly cloudy in the evening, then becoming mostly cloudy. .SUNDAY...South winds 10 knots or less becoming southwest. Snow and rain. .SUNDAY NIGHT...West winds 10 knots or less. Rain likely in the evening, then a chance of rain overnight. .MONDAY...West winds 10 knots or less becoming south. Mostly cloudy. .TUESDAY...South winds 10 knots or less. Rain. .WEDNESDAY...South winds 5 to 15 knots becoming southwest. Rain showers likely. $$