Lake Michigan Beach Sea Water Temperature
A cool beach on the James Bay, warmest around August at about 20°C. Today's reading, 7-day forecast, and monthly averages below.
Lake Michigan Beach water temperature
Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing.
7-Day Water Temperature Forecast
Lake Michigan Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Lake Michigan Beach occurs inJuly, August, September, October — peaking at20°C (68°F) in August.
Year-Round Water Temperature Curve (°C / °F)
Hover a bar for detailsFull 12-month data table — min / avg / max & swimming comfort
| Month | Min Water Temp | Average Water Temp | Max Water Temp | Swimming Comfort |
|---|---|---|---|---|
| January | 0.5°C | 2.8°C | 4.7°C | Very Cold (< 16°C) |
| February | 0°C | 1.3°C | 4°C | Very Cold (< 16°C) |
| March | 0°C | 1.2°C | 3.1°C | Very Cold (< 16°C) |
| April | 0°C | 1.9°C | 4.3°C | Very Cold (< 16°C) |
| May | 1.9°C | 4.6°C | 10.4°C | Very Cold (< 16°C) |
| June | 5.7°C | 11.3°C | 16.7°C | Very Cold (< 16°C) |
| July | 12.5°C | 17.5°C | 22.5°C | Cool / Refreshing (16°C – 20°C) |
| August | 16.8°C | 20°C | 22.9°C | Comfortable (20°C – 24°C) |
| SeptemberCurrent | 14.3°C | 18.1°C | 21.7°C | Cool / Refreshing (16°C – 20°C) |
| October | 10°C | 13.7°C | 18.7°C | Very Cold (< 16°C) |
| November | 5°C | 8.7°C | 13.2°C | Very Cold (< 16°C) |
| December | 2.4°C | 5.1°C | 8.7°C | Very Cold (< 16°C) |
Swimming FAQs for Lake Michigan Beach
Is the sea warm enough to swim in Lake Michigan Beach today?
Typical sea surface temperature in Lake Michigan Beach this time of year is 18.1°C (64.6°F) — classified as Cool / Refreshing (16°C – 20°C). Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing. Live readings load automatically.
What are the warmest months for swimming in Lake Michigan Beach?
The highest water temperatures in Lake Michigan Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Lake Michigan Beach in September?
Historically in September, water temperatures in Lake Michigan Beach average around18.1°C (64.6°F), fluctuating between a recorded minimum of 14.3°C and a maximum of 21.7°C.