Great Lakes Forecast
Issued by NWS
Issued by NWS
768 FZUS61 KBUF 012003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Tue Sep 1 2026 SLZ022-024-020300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Tue Sep 1 2026 .TONIGHT...Northeast winds 5 to 10 knots becoming light and variable. Patchy fog after midnight. .WEDNESDAY...Southeast winds 10 knots or less becoming south. Patchy fog in the morning. A chance of showers and thunderstorms early in the afternoon. Showers likely with a chance of thunderstorms late. .WEDNESDAY NIGHT...South winds 5 to 10 knots becoming southwest. Showers with a chance of thunderstorms. .THURSDAY...Southwest winds 10 knots or less becoming west. Showers likely in the morning, then a chance of showers in the afternoon. .THURSDAY NIGHT...West winds less than 10 knots. A chance of showers in the evening. .FRIDAY...Northwest winds less than 10 knots. Becoming mainly clear. .SATURDAY...North winds 10 knots or less becoming northeast. Partly cloudy. .SUNDAY...Northeast winds less than 10 knots. Becoming mainly clear. Winds and waves higher in and near thunderstorms. $$