Great Lakes Forecast
Issued by NWS
Issued by NWS
857 FZUS61 KBUF 161403 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 AM EDT Sun Aug 16 2026 SLZ022-024-162100- Saint Lawrence River from Cape Vincent to Saint Regis 1003 AM EDT Sun Aug 16 2026 .THIS AFTERNOON...Southeast winds less than 10 knots becoming northeast. Sunny, then becoming mostly cloudy. .TONIGHT...East winds 5 to 15 knots becoming southwest. Showers with a chance of thunderstorms through the early overnight, then a chance of showers late. .MONDAY...Southwest winds less than 10 knots becoming northwest. A chance of showers. .MONDAY NIGHT...Northwest winds less than 10 knots. Patchy fog overnight. .TUESDAY...Light and variable winds becoming south 5 to 10 knots. Patchy fog during the day. A chance of showers Tuesday night. .WEDNESDAY...Southwest winds 10 knots or less becoming west. Showers likely with a chance of thunderstorms during the day, then a chance of showers and thunderstorms Wednesday night. .THURSDAY...Light and variable winds. Mainly clear. Winds and waves higher in and near thunderstorms. $$