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Lake Koshkonong water level today
Lake Koshkonong is at 776.22 ft, as of October 18, 2026.
- Past week: down 0.41 ft
- Compared with a year ago: down 0.02 ft
- 0.48 ft below the 7-year average for October 18 (776.70 ft)
Water level776.22 ftelevation, feet
vs. normal-0.48 ft7-year average for today
7-day change-0.41 ft
30-day change-0.26 ft
1-year change-0.02 ft
Past 12 months
Past 12 monthsYear before
Last 30 days
| Date | Level (ft) |
|---|---|
| Oct 18 | 776.22 |
| Oct 17 | 776.31 |
| Oct 16 | 776.45 |
| Oct 15 | 776.46 |
| Oct 14 | 776.51 |
| Oct 13 | 776.56 |
| Oct 12 | 776.56 |
| Oct 11 | 776.63 |
| Oct 10 | 776.70 |
| Oct 9 | 776.75 |
| Oct 8 | 776.78 |
| Oct 7 | 776.82 |
| Oct 6 | 776.76 |
| Oct 5 | 776.78 |
| Oct 4 | 776.78 |
| Oct 3 | 776.73 |
| Oct 2 | 776.72 |
| Oct 1 | 776.65 |
| Sep 30 | 776.54 |
| Sep 29 | 776.57 |
| Sep 28 | 776.66 |
| Sep 27 | 776.71 |
| Sep 26 | 776.68 |
| Sep 25 | 776.71 |
| Sep 24 | 776.71 |
| Sep 23 | 776.69 |
| Sep 22 | 776.67 |
| Sep 21 | 776.65 |
| Sep 20 | 776.64 |
| Sep 19 | 776.58 |
| Sep 18 | 776.48 |
This date in past years
| Date | Level (ft) | Today vs. then |
|---|---|---|
| October 18, 2025 | 776.24 | -0.02 |
| October 18, 2024 | 776.21 | +0.01 |
| October 18, 2023 | 775.91 | +0.31 |
| October 18, 2022 | 775.91 | +0.31 |
| October 18, 2021 | 775.85 | +0.37 |
| October 18, 2020 | 776.22 | +0.00 |
| October 18, 2019 | 780.59 | -4.37 |
Records
Highest level on record: 781.15 ft (April 24, 2026). Lowest: 775.28 ft (February 26, 2021). Records in this series start September 30, 2019.
About these numbers
- Levels are daily mean water-surface elevations measured by the U.S. Geological Survey at this lake's gauge
- Recent readings are provisional and can be revised once USGS reviews them
- "vs. normal" compares today with the average for the same calendar date over the last 10 years of this gauge's record
- Latest reading: October 18, 2026. Official USGS page for this gauge