SXUS45 KMSO 242330 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 505 PM MDT Fri Oct 24 2025 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. A slight chance of rain after midnight. A chance of rain late in the night. Lows in the mid 40s. South winds around 15 mph. Chance of rain 50 percent. Waves around 1 foot...locally up to 2 feet. .SATURDAY...Mostly cloudy. A chance of rain in the morning, then showers likely in the afternoon. Highs in the lower 50s. South winds around 15 mph with gusts to around 30 mph. Chance of precipitation 70 percent. Waves around 1 foot...locally up to 2 feet. .SATURDAY NIGHT...Breezy. Showers in the evening, then rain likely after midnight. Lows around 40 . Southwest winds 15 to 25 mph with gusts to around 30 mph. Chance of precipitation near 100 percent. Waves around 1 foot...locally up to 2 feet building to 1 to 2 feet...locally up to 3 feet early in the morning. .SUNDAY...Breezy. Rain likely. Highs in the mid 40s. Southwest winds 15 to 20 mph. Chance of rain 70 percent. Waves 1 to 2 feet...locally up to 3 feet subsiding to around 1 foot... locally up to 2 feet in the afternoon.