Water temperature in Foster Beach (IL) in March
Is it warm enough to swim in Foster Beach in March? Average water temperature in Foster Beach in March is 36.3°F and therefore is not suitable for comfortable swimming. The warmest water in Foster Beach in March is 45°F, and the coldest is 31.1°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Foster Beach
Changes water temperature in Foster Beach in March 2026, 2025
To get an accurate forecast for the water temperature in Foster Beach for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Foster Beach, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of March.
You can choose any other years:
| Day | 2026 | 2025 | Min | Max |
|---|---|---|---|---|
| March 1 | 33.6°F | 33.6°F | 31.6°F | 37.4°F |
| March 2 | 33.4°F | 33.3°F | 31.6°F | 38.1°F |
| March 3 | 33.6°F | 33.3°F | 31.5°F | 37.9°F |
| March 4 | 34.5°F | 33.3°F | 31.6°F | 38.7°F |
| March 5 | 34.5°F | 33.3°F | 31.6°F | 38.5°F |
| March 6 | 35.8°F | 34.9°F | 31.1°F | 39.2°F |
| March 7 | 36.9°F | 34.9°F | 31.8°F | 39.4°F |
| March 8 | 36.9°F | 35.8°F | 31.8°F | 38.7°F |
| March 9 | 37.9°F | 36.5°F | 31.8°F | 39.4°F |
| March 10 | 37.4°F | 36.7°F | 33.3°F | 39.2°F |
| March 11 | 37.8°F | 33.1°F | 39.4°F | |
| March 12 | 37.4°F | 32°F | 39.4°F | |
| March 13 | 37.2°F | 32.4°F | 40.1°F | |
| March 14 | 39.6°F | 32.5°F | 39.6°F | |
| March 15 | 39°F | 32.5°F | 45°F |
| Day | 2026 | 2025 | Min | Max |
|---|---|---|---|---|
| March 16 | 38.5°F | 32.5°F | 44.2°F | |
| March 17 | 40.3°F | 33.1°F | 41°F | |
| March 18 | 37.4°F | 33.4°F | 43°F | |
| March 19 | 37.2°F | 33.4°F | 42.8°F | |
| March 20 | 39°F | 33.4°F | 42.8°F | |
| March 21 | 39.6°F | 33.1°F | 43.3°F | |
| March 22 | 39°F | 33.3°F | 42.6°F | |
| March 23 | 38.5°F | 33.3°F | 43°F | |
| March 24 | 38.8°F | 33.4°F | 42.6°F | |
| March 25 | 39°F | 33.6°F | 45°F | |
| March 26 | 39.6°F | 34.3°F | 42.4°F | |
| March 27 | 39.6°F | 34.7°F | 45°F | |
| March 28 | 38.3°F | 35.1°F | 43.2°F | |
| March 29 | 38.8°F | 34.3°F | 43.2°F | |
| March 30 | 37.6°F | 34.3°F | 42.6°F | |
| March 31 | 39.7°F | 36°F | 42.3°F |
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Average water temperature in Foster Beach in March over a decade
| 2016 | 2017 | 2018 | 2019 | 2020 |
| 36.9°F | 37.2°F | 36°F | 34.9°F | 36.1°F |
| 2021 | 2022 | 2023 | 2024 | 2025 |
| 37.8°F | 35.2°F | 36.5°F | 39.7°F | 37.2°F |
Foster Beach water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below
