Indiana Dunes Beach Water Temperature
Lake Michigan surface temperature at Indiana Dunes Beach, Indiana · times in CDT
Updated 6:03 AM CDT
How it compares today
Water temperature through the year
Monthly normals computed from 2023–2025 daily GLSEA satellite surface temperature history.
Nearby water right now
7-day outlook
| Day | Air high / low | Max UV | Rain |
|---|---|---|---|
| Fri, Aug 28 | 79° / 58° | 6 | 0% |
| Sat, Aug 29 | 80° / 61° | 5 | 6% |
| Sun, Aug 30 | 83° / 64° | 6 | 6% |
| Mon, Aug 31 | 86° / 68° | 6 | 5% |
| Tue, Sep 1 | 89° / 75° | 7 | 8% |
| Wed, Sep 2 | 91° / 73° | 6 | 21% |
| Thu, Sep 3 | 80° / 70° | 6 | 17% |
Water temperature from the NOAA GLERL Great Lakes Surface Environmental Analysis (satellite, updated daily); waves from the Open-Meteo marine model; weather from Open-Meteo.
Is Indiana Dunes Beach warm enough to swim?
At 75°F, the water at Indiana Dunes Beach is comfortable. Most swimmers are comfortable without a wetsuit above 72°F; below 62°F, cold-water shock becomes a real risk for unprotected swimmers.
That is 1° above the August average of 74°F here.
The water averages above 70°F in July, August and September — 3 months of the year — peaking around 74°F in August and dropping to about 36°F in February.
Frequently asked questions
How warm is the water at Indiana Dunes Beach right now?
The Lake Michigan surface temperature is about 75°F, from NOAA’s daily satellite analysis. That is 1° above the August average of 74°F here.
When is the water warm enough to swim at Indiana Dunes Beach?
The water averages above 70°F in July, August and September — 3 months of the year — peaking around 74°F in August and dropping to about 36°F in February.
What is the warmest the water gets at Indiana Dunes Beach?
Around 74°F in August, based on 2023–2025 records. The coolest month is February at roughly 36°F.