Conditions
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
Dived here today? How were conditions vs. what we showed?
About this site
Big Arm Bay is an inlet on the west side of Flathead Lake, Montana's largest natural freshwater lake, in the Big Arm area of Lake County. The lake sits in a glacially carved valley south of Kalispell and Polson, ringed by the Mission and Salish mountain ranges.
AI overviewDurable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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