120
SXUS45 KMSO 312330
RECGPI

Recreation Forecast for Flathead Lake
National Weather Service Missoula MT
505 PM MDT Mon Aug 31 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 clear until early morning then becoming mostly
cloudy. Lows in the mid 50s. Variable winds up to 10 mph. Waves
less than 1 foot.
.TUESDAY...Mostly sunny. Highs in the upper 70s. Variable winds
up to 10 mph. Waves less than 1 foot.
.TUESDAY NIGHT...Mostly cloudy. A slight chance of rain in the
evening, then a chance of rain after midnight. Lows in the upper
50s. Variable winds up to 10 mph. Chance of rain 40 percent.
Waves less than 1 foot.
.WEDNESDAY...Cooler. Rain likely in the morning, then showers
likely and a chance of thunderstorms in the afternoon. Some
thunderstorms may produce strong gusty winds in the afternoon.
Highs in the mid 60s. Variable winds up to 10 mph becoming
southwest around 15 mph in the afternoon. Chance of precipitation
70 percent. Waves less than 1 foot.