147
SXUS45 KMSO 182330
RECGPI

Recreation Forecast for Flathead Lake
National Weather Service Missoula MT
505 PM MDT Sat Jul 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 clear. A 20 percent chance of thunderstorms
early in the evening. Patchy smoke through the night. Some
thunderstorms may produce strong gusty winds, small hail, and
heavy rainfall early in the evening. Lows around 60 . Variable
winds up to 10 mph. Waves less than 1 foot.
.SUNDAY...Sunny. Patchy smoke in the morning. Highs around 80 .
Variable winds up to 10 mph. Waves less than 1 foot.
.SUNDAY NIGHT...Mostly clear in the evening then becoming mostly
cloudy. Patchy smoke after midnight. Lows around 60 . Variable
winds up to 10 mph. Waves less than 1 foot.
.MONDAY...Mostly sunny. Patchy smoke in the morning. Highs around
80 . Variable winds up to 10 mph. Waves less than 1 foot.