SXUS45 KMSO 072330 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 505 PM MDT Tue Jul 7 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 clear. Lows around 60 . Variable winds up to 10 mph. Waves less than 1 foot. .WEDNESDAY...Mostly sunny. Highs around 80 . Variable winds up to 10 mph becoming south around 15 mph in the afternoon. Waves less than 1 foot. .WEDNESDAY NIGHT...Partly cloudy. Lows around 60 . Variable winds up to 10 mph. Gusts up to 25 mph in the evening. Waves less than 1 foot. .THURSDAY...Sunny. Highs in the upper 70s. Variable winds up to 10 mph becoming southwest around 15 mph in the afternoon. Waves less than 1 foot.