SXUS45 KMSO 272330 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 506 PM MDT Mon Oct 27 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 and snow early in the evening, then a chance of rain and snow in the late evening and overnight. Lows in the mid 30s. Variable winds up to 10 mph. Chance of precipitation 40 percent. Waves around 1 foot... locally up to 2 feet. .TUESDAY...Partly sunny in the morning then clearing. Highs in the mid 40s. Variable winds up to 10 mph. Waves around 1 foot... locally up to 2 feet. .TUESDAY NIGHT...Mostly cloudy. Lows in the upper 30s. Variable winds up to 10 mph. Waves less than 1 foot. .WEDNESDAY...Mostly cloudy. Rain likely in the morning, then a chance of rain in the afternoon. Highs in the upper 40s. South winds around 15 mph. Chance of rain 70 percent. Waves around 1 foot...locally up to 2 feet.