SXUS45 KMSO 182330
RECGPI

Recreation Forecast for Flathead Lake
National Weather Service Missoula MT
505 PM MDT Mon May 18 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...Mostly cloudy then becoming partly cloudy after
midnight then becoming mostly cloudy. A 20 percent chance of rain
early in the evening. Lows in the lower 40s. Variable winds up to
10 mph. Waves less than 1 foot. 
.TUESDAY...Partly sunny. A chance of showers and a slight chance
of thunderstorms in the afternoon. Highs around 60 . Variable
winds up to 10 mph. Chance of precipitation 50 percent. Waves
less than 1 foot. 
.TUESDAY NIGHT...Mostly cloudy. A 20 percent chance of rain after
midnight. Lows in the mid 40s. Variable winds up to 10 mph. Waves
less than 1 foot. 
.WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then
showers likely and a chance of thunderstorms in the afternoon.
Highs in the upper 50s. Variable winds up to 10 mph. Chance of
precipitation 70 percent. Waves less than 1 foot.