SXUS45 KMSO 011230 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 506 AM MST Sun Feb 1 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...Mostly cloudy. Highs in the lower 50s. Variable winds up to 10 mph. Waves less than 1 foot. .Tonight...Breezy. Mostly cloudy. A chance of rain in the evening, then a slight chance of rain after midnight. Lows around 40 . South winds 15 to 20 mph. Chance of rain 50 percent. Waves around 1 foot...locally up to 2 feet. .MONDAY...Mostly cloudy. A 20 percent chance of rain in the afternoon. Highs in the mid 40s. Variable winds up to 10 mph. Waves around 1 foot...locally up to 2 feet. .MONDAY NIGHT...Mostly cloudy. Lows around 40 . Variable winds up to 10 mph. Waves less than 1 foot. .TUESDAY...Mostly cloudy. Highs in the mid 40s. Variable winds up to 10 mph. Waves less than 1 foot.