Indiana Dunes water temp
This data the coastal Indiana Dunes water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Current water temperature in Indiana Dunes
Water temperature in Indiana Dunes today is 68.9°F. Based on our historical data over a period of ten years, the warmest water in this day in Indiana Dunes was recorded in 2017 and was 71.2°F, and the coldest was recorded in 2012 at 64.2°F. Water temperature in Indiana Dunes is expected to drop to 63.5°F in the next 10 days. September average water temperature in Indiana Dunes is 69.3°F, the minimum temperature is 62.4°F, and the maximum is 74.8°F.
The swimming season in Indiana Dunes lasts from July to September. During those months, Indiana Dunes water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Indiana Dunes in winter reaches 37.6°F, in spring 43.7°F, in summer the average temperature rises to 70°F, and in autumn it is 59.7°F.
Indiana Dunes water temperature now
| September 26, 2025 |
|---|
| today temp |
| 68.9°F |
| September 25, 2025 |
|---|
| yesterday temp |
| 68.5°F |
Surf Forecast in Indiana Dunes for today
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Indiana Dunes. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Indiana Dunes. Data in table shown for September 26, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
| 1' 3" | 1' 0" | 0' 10" | 0' 8" |
| 0.39 m | 0.31 m | 0.25 m | 0.2 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 0' 6" | 0' 5" | 0' 4" | 0' 3" |
| 0.15 m | 0.12 m | 0.09 m | 0.07 m |
Surf report in Indiana Dunes
Indiana Dunes weather forecast
Current temperature and weather
Data in a table show Indiana Dunes temperature today (September 26, 2025). For more information and forecast for a few days, go to the weather forecast Indiana Dunes.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 58.5°F | 55.6°F | 54°F | 59.7°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | | |
| 77.7°F | 77.4°F | 76.3°F | 69.1°F |
You may also be interested in other sections of our site for Indiana Dunes: Sunrise and Sunset, Tides
Indiana Dunes water temperature by month
These figures shows the average, minimum and maximum monthly water temperature in Indiana Dunes. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Indiana Dunes on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 36.3°F | 30.4°F | 41.9°F | cold |
| Water temperature in Indiana Dunes in January | ||||
| February | 34.3°F | 30.9°F | 38.7°F | cold |
| Water temperature in Indiana Dunes in February | ||||
| March | 36.3°F | 30.9°F | 45.5°F | cold |
| Water temperature in Indiana Dunes in March | ||||
| April | 42.3°F | 33.3°F | 51.6°F | cold |
| Water temperature in Indiana Dunes in April | ||||
| May | 52.7°F | 44.1°F | 68.5°F | cold |
| Water temperature in Indiana Dunes in May | ||||
| June | 64°F | 54.7°F | 74.1°F | cold |
| Water temperature in Indiana Dunes in June | ||||
| July | 72.3°F | 64.2°F | 78.4°F | warm |
| Water temperature in Indiana Dunes in July | ||||
| August | 73.4°F | 65.1°F | 77.5°F | warm |
| Water temperature in Indiana Dunes in August | ||||
| September | 69.3°F | 62.4°F | 74.8°F | warm |
| Water temperature in Indiana Dunes in September | ||||
| October | 59.7°F | 49.8°F | 68.7°F | cold |
| Water temperature in Indiana Dunes in October | ||||
| November | 50°F | 38.5°F | 59.4°F | cold |
| Water temperature in Indiana Dunes in November | ||||
| December | 41.9°F | 33.8°F | 48.9°F | cold |
| Water temperature in Indiana Dunes in December | ||||
Chart monthly average water temperature in Indiana Dunes
