FZUS61 KBUF 090803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Thu Jul 9 2026 SLZ022-024-091500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Thu Jul 9 2026 .TODAY...Southwest winds 10 knots or less becoming north. A chance of showers late this morning. Showers with a chance of thunderstorms this afternoon. .TONIGHT...Northeast winds 5 to 10 knots becoming light and variable. Showers with a chance of thunderstorms through the early overnight, then a chance of showers late. .FRIDAY...Light and variable winds. Partly to mostly sunny. .FRIDAY NIGHT...North winds less than 10 knots. Mainly clear in the evening, then becoming partly cloudy. .SATURDAY...Northeast winds less than 10 knots. Mainly clear. .SUNDAY...Light and variable winds. Mainly clear. .MONDAY...Southwest winds 5 to 10 knots. Mainly clear, then becoming partly cloudy. Winds and waves higher in and near thunderstorms. $$