Great Lakes Forecast
Issued by NWS
Issued by NWS
678 FZUS61 KBUF 010203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Thu Apr 30 2026 SLZ022-024-010900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Thu Apr 30 2026 .OVERNIGHT...Northwest winds 10 knots or less becoming north. Partly to mostly cloudy. .FRIDAY...North winds 10 knots or less becoming west. A chance of rain showers late. .FRIDAY NIGHT...Southwest winds less than 10 knots. A chance of rain showers in the evening. .SATURDAY...West winds 10 knots or less. A chance of rain showers. .SATURDAY NIGHT...West winds 10 knots or less becoming southwest. Partly cloudy. .SUNDAY...West winds 5 to 15 knots becoming southwest. Partly to mostly cloudy. .MONDAY...Southwest winds 10 to 15 knots becoming south 15 to 20 knots. Showers likely. .TUESDAY...Southwest winds 15 to 20 knots diminishing to 5 to 15 knots. A chance of showers. $$