Great Lakes Forecast
Issued by NWS
Issued by NWS
447 FZUS61 KBUF 302002 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 PM EDT Thu Jul 30 2026 SLZ022-024-310300- Saint Lawrence River from Cape Vincent to Saint Regis 402 PM EDT Thu Jul 30 2026 .TONIGHT...Northwest winds less than 10 knots. Scattered showers early. Patchy fog from late evening on. .FRIDAY...Light and variable winds becoming west 5 to 10 knots. Patchy fog early. .FRIDAY NIGHT...Southwest winds less than 10 knots becoming south. Partly to mostly cloudy. .SATURDAY...South winds less than 10 knots becoming southwest. A chance of showers. .SATURDAY NIGHT...Light and variable winds. A chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms overnight. .SUNDAY...Southeast winds 10 knots or less becoming northwest. Showers with a chance of thunderstorms. .MONDAY...Northwest winds 5 to 10 knots becoming light and variable. A chance of showers. .TUESDAY...South winds less than 10 knots. Mainly clear, then becoming partly cloudy. Winds and waves higher in and near thunderstorms. $$