Great Lakes Forecast
Issued by NWS
Issued by NWS
477 FZUS61 KBUF 240205 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1005 PM EDT Thu Apr 23 2026 SLZ022-024-240900- Saint Lawrence River from Cape Vincent to Saint Regis 1005 PM EDT Thu Apr 23 2026 .OVERNIGHT...North winds 10 knots or less. Partly to mostly cloudy. .FRIDAY...North winds 10 knots or less becoming northeast. Sunny. .FRIDAY NIGHT...Northeast winds 10 knots or less becoming east. Mainly clear. .SATURDAY...Northeast winds 5 to 10 knots. Partly to mostly sunny. .SATURDAY NIGHT...Northeast winds 10 knots or less. Mostly cloudy. .SUNDAY...Northeast winds less than 10 knots. Becoming mainly clear. .MONDAY...Light and variable winds becoming southeast 5 to 10 knots. Becoming mainly clear. .TUESDAY...Southeast winds 5 to 15 knots becoming south. Showers likely. $$