SXUS45 KMSO 022330 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 505 PM MDT Tue Jun 2 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 early in the evening then becoming partly cloudy. Lows in the upper 40s. Variable winds up to 10 mph. Waves less than 1 foot. .WEDNESDAY...Sunny. Highs in the upper 60s. Variable winds up to 10 mph. Waves less than 1 foot. .WEDNESDAY NIGHT...Mostly cloudy. A 50 percent chance of rain after midnight. Lows in the lower 50s. Variable winds up to 10 mph. Waves less than 1 foot. .THURSDAY...Partly sunny. A chance of rain in the morning, then a chance of showers and a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Variable winds up to 10 mph becoming southwest around 15 mph in the afternoon. Chance of precipitation 50 percent. Waves less than 1 foot.