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Lake Sammamish water level today
Lake Sammamish is at 25.96 ft, as of October 18, 2026.
- Past week: up 0.01 ft
- Compared with a year ago: up 0.28 ft
- 0.21 ft below the 10-year average for October 18 (26.17 ft)
- Lower on this date in 2 of the 14 years on record
Water level25.96 ftelevation, feet
vs. normal-0.21 ft10-year average for today
7-day change+0.01 ft
30-day change+0.21 ft
1-year change+0.28 ft
Past 12 months
Past 12 monthsYear before
Last 30 days
| Date | Level (ft) |
|---|---|
| Oct 18 | 25.96 |
| Oct 17 | 25.96 |
| Oct 16 | 25.95 |
| Oct 15 | 25.95 |
| Oct 14 | 25.95 |
| Oct 13 | 25.95 |
| Oct 12 | 25.95 |
| Oct 11 | 25.95 |
| Oct 10 | 25.94 |
| Oct 9 | 25.91 |
| Oct 8 | 25.88 |
| Oct 7 | 25.88 |
| Oct 6 | 25.88 |
| Oct 5 | 25.88 |
| Oct 4 | 25.88 |
| Oct 3 | 25.87 |
| Oct 2 | 25.87 |
| Oct 1 | 25.87 |
| Sep 30 | 25.87 |
| Sep 29 | 25.87 |
| Sep 28 | 25.87 |
| Sep 27 | 25.87 |
| Sep 26 | 25.88 |
| Sep 25 | 25.79 |
| Sep 24 | 25.73 |
| Sep 23 | 25.74 |
| Sep 22 | 25.74 |
| Sep 21 | 25.75 |
| Sep 20 | 25.75 |
| Sep 19 | 25.75 |
| Sep 18 | 25.75 |
This date in past years
| Date | Level (ft) | Today vs. then |
|---|---|---|
| October 18, 2025 | 25.68 | +0.28 |
| October 18, 2024 | 26.12 | -0.16 |
| October 18, 2023 | 26.36 | -0.40 |
| October 18, 2022 | 25.82 | +0.14 |
| October 18, 2021 | 26.02 | -0.06 |
| October 18, 2020 | 26.44 | -0.48 |
| October 18, 2019 | 26.35 | -0.39 |
| October 18, 2018 | 26.14 | -0.18 |
| October 18, 2017 | 25.98 | -0.02 |
| October 18, 2016 | 26.75 | -0.79 |
Records
Highest level on record: 31.12 ft (February 9, 2020). Lowest: 25.52 ft (September 16, 2021). Records in this series start October 23, 2011.
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