Michigan · Multiple shoreline counties County
Lake Michigan
Traverse City · Ludington · Grand Haven · St. Joseph
Loading live conditions for Lake Michigan…
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"The only Great Lake entirely inside the US, and the one people actually swim in — Michigan's west coast is 300 miles of sandy beach towns, dunes, and clear (cold) water. Nearshore surface temps climb from the 50s in June to the low 70s by August, but wind-driven upwellings can drop a beach 15 degrees overnight."
Seasonal pattern
When does Lake Michigan warm up?
Lake Michigan is deep (max depth 923ft) and carries significant thermal inertia, so it warms slowly — surface temperatures typically don't reach comfortable swimming range until late June or early July. Spring-fed or alpine lakes stay cooler all summer. The live forecast above shows current conditions.
Field notes
About Lake Michigan
- Third-largest Great Lake — the only one entirely within the US
- East-shore beach towns (Ludington, Grand Haven) get the warmest summer water
- Wind-driven upwellings can swing nearshore temps 10-15°F in a day
- Massive thermal inertia — warmest water arrives August, not July
- Surface area
- 14,340,000 acres
- Max depth
- 923 ft
- County
- Multiple shoreline counties
- Water data
- Modeled estimate from air-temp trends