SXUS45 KMSO 162330 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 505 PM MDT Fri Oct 16 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...Partly cloudy. Lows in the upper 40s. Variable winds up to 10 mph. Waves less than 1 foot. .SATURDAY...Breezy. Mostly sunny. Highs in the lower 60s. South winds 15 to 25 mph. Waves around 1 foot...locally up to 2 feet. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. Variable winds up to 10 mph. Gusts up to 25 mph in the evening. Waves around 1 foot...locally up to 2 feet. .SUNDAY...Sunny. Highs in the upper 50s. Variable winds up to 10 mph. Waves less than 1 foot.