SXUS45 KMSO 091230 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 605 AM MDT Thu Jul 9 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. .Today...Sunny. Highs in the upper 70s. South winds around 15 mph. Waves less than 1 foot. .Tonight...Mostly clear. Lows in the mid 50s. Variable winds up to 10 mph. Waves less than 1 foot. .FRIDAY...Sunny. Highs around 80 . Variable winds up to 10 mph becoming south around 15 mph in the afternoon. Waves less than 1 foot. .FRIDAY NIGHT...Mostly clear. Lows in the mid 50s. Variable winds up to 10 mph. Waves less than 1 foot. .SATURDAY...Sunny. Highs in the lower 80s. Variable winds up to 10 mph. Waves less than 1 foot.