SXUS45 KMSO 242330 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 506 PM MDT Sat Oct 24 2026 Note: The experimental wave height forecasts are representative of the mid lake waters and downwind shores. Wave heights may be significantly less on upwind shores. .Tonight...Mostly cloudy until early morning then becoming partly cloudy. Lows in the mid 30s. Variable winds up to 10 mph. Waves around 1 foot...locally up to 2 feet. .SUNDAY...Partly sunny. Highs around 50 . North winds around 15 mph in the morning becoming light. Waves around 1 foot... locally up to 2 feet. .SUNDAY NIGHT...Mostly cloudy. Lows in the mid 30s. Variable winds up to 10 mph. Waves around 1 foot...locally up to 2 feet. .MONDAY...Mostly cloudy in the morning then becoming mostly sunny. Highs around 50 . Variable winds up to 10 mph. Waves around 1 foot...locally up to 2 feet.