FZUS61 KBUF 100802 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EDT Wed Jun 10 2026 SLZ022-024-101500- Saint Lawrence River from Cape Vincent to Saint Regis 402 AM EDT Wed Jun 10 2026 .TODAY...South winds 5 to 10 knots becoming southwest. A chance of showers early, then showers with a chance of thunderstorms from late morning on. .TONIGHT...Southwest winds 10 knots or less. Showers likely with a chance of thunderstorms through the early overnight. .THURSDAY...Southwest winds 10 knots or less. A chance of showers in the afternoon. .THURSDAY NIGHT...Southwest winds less than 10 knots. A chance of showers in the evening. .FRIDAY...South winds 5 to 10 knots becoming southwest. Showers likely with a chance of thunderstorms. .SATURDAY...Southwest winds 5 to 10 knots. Mainly clear, then becoming partly cloudy. .SUNDAY...Southwest winds 5 to 10 knots. A chance of showers. Winds and waves higher in and near thunderstorms. $$