938
SXUS45 KMSO 212330
RECGPI

Recreation Forecast for Flathead Lake
National Weather Service Missoula MT
505 PM MDT Fri Aug 21 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 early in the evening then becoming
mostly cloudy. Lows in the lower 60s. Variable winds up to
10 mph. Waves less than 1 foot.
.SATURDAY...Mostly cloudy in the morning, then mostly sunny with
a 20 percent chance of rain in the afternoon. Highs around 80 .
Variable winds up to 10 mph. Waves less than 1 foot.
.SATURDAY NIGHT...Mostly cloudy with a slight chance of
thunderstorms in the evening, then partly cloudy with a slight
chance of rain after midnight. Some thunderstorms may produce
strong gusty winds in the evening. Lows around 60 . Variable
winds up to 10 mph. Chance of precipitation 20 percent. Waves
less than 1 foot.
.SUNDAY...Sunny. A 20 percent chance of rain in the afternoon.
Highs in the mid 70s. Variable winds up to 10 mph becoming
southwest around 15 mph in the afternoon. Waves around 1 foot...
locally up to 2 feet.