850
SXUS45 KMSO 122330
RECGPI

Recreation Forecast for Flathead Lake
National Weather Service Missoula MT
505 PM MDT Tue May 12 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 then becoming mostly cloudy late in the
evening then becoming partly cloudy. Lows in the lower 50s.
Variable winds up to 10 mph. Waves less than 1 foot.
.WEDNESDAY...Breezy. Mostly cloudy. Showers likely and a slight
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 15 to 25 mph
with gusts to around 40 mph in the afternoon. Chance of
precipitation 70 percent. Waves around 1 foot...locally up to
2 feet.
.WEDNESDAY NIGHT...Windy. Rain likely in the evening, then a
chance of rain after midnight. Lows in the mid 40s. Southwest
winds 20 to 30 mph. Chance of rain 70 percent. Waves around
1 foot...locally up to 2 feet building to 1 to 3 feet...locally
up to 4 feet in the late evening and overnight.
.THURSDAY...Windy. Partly sunny. A 20 percent chance of rain in
the morning. Highs in the mid 50s. Southwest winds 20 to 30 mph.
Waves 1 to 3 feet...locally up to 4 feet.