SXUS45 KMSO 241230 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 505 AM MST Sat Jan 24 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...Partly sunny early in the morning then becoming cloudy. Highs in the mid 20s. Variable winds up to 10 mph. Waves less than 1 foot. .Tonight...Mostly cloudy. Lows 15 to 20. Variable winds up to 10 mph. Waves less than 1 foot. .SUNDAY...Mostly sunny. Highs in the upper 20s. Variable winds up to 10 mph. Waves less than 1 foot. .SUNDAY NIGHT...Mostly clear. Lows near 15. Variable winds up to 10 mph. Waves less than 1 foot. .MONDAY...Mostly sunny. Highs in the lower 30s. Variable winds up to 10 mph. Waves less than 1 foot.