How warm is the sea in Michigan in September?

The sea off Michigan averages about 27.0°C in September.

When is the best time to swim in Michigan?

Michigan's water is warmest in July (around 28°C). There are typically 7 months a year with sea temperatures above 22°C, roughly July–August.

Great Lakes beaches on Lake Michigan, Huron and Superior.

Beaches tracked

Coastal regions

Avg sea temp now

27.1°C

Best swim months

July–August

Michigan's freshwater coastline on Lakes Michigan, Huron and Superior has some of the warmest Great Lakes swimming in mid-to-late summer.

Top 5 beaches ranked by live sea temperature right now.

Bottom 5 beaches ranked by live sea temperature, coldest first.

Beach	Region	Sea	Swim score
Grand Haven Beach	Michigan	27.7°C	Excellent
Tawas Point	Michigan	27.7°C	Excellent
Ludington Beach	Michigan	27.7°C	Excellent
Petoskey State Park	Michigan	27.6°C	Excellent
Empire Beach	Michigan	27.4°C	Excellent
Wilderness State Park	Michigan	27.3°C	Excellent
Sleeping Bear Beach	Michigan	27.2°C	Excellent
Pere Marquette Beach	Michigan	27.2°C	Excellent
Oval Beach	Michigan	27.1°C	Excellent
Warren Dunes	Michigan	26.9°C	Excellent
Traverse City Beach	Michigan	26.7°C	Excellent
Silver Beach	Michigan	26.6°C	Excellent
Holland State Park	Michigan	26.4°C	Excellent
Sleeping Bear Beach	Michigan	26.4°C	Excellent