FZUS61 KBUF 082002 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 401 PM EDT Wed Jul 8 2026 SLZ022-024-090300- Saint Lawrence River from Cape Vincent to Saint Regis 401 PM EDT Wed Jul 8 2026 .TONIGHT...Southwest winds 10 knots or less. Mainly clear early, then becoming partly cloudy. .THURSDAY...Southwest winds 10 knots or less becoming west. Showers with a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...West winds less than 10 knots. Showers with a chance of thunderstorms in the evening, then showers overnight. .FRIDAY...Light and variable winds. A chance of showers in the morning. .FRIDAY NIGHT...North winds less than 10 knots. Mainly clear. .SATURDAY...North winds less than 10 knots. Mainly clear. .SUNDAY...Light and variable winds. Mainly clear. .MONDAY...Southwest winds 10 knots or less. Partly cloudy. Winds and waves higher in and near thunderstorms. $$