Lake levels
Lake St. Clair, MI
- water level
- 575.19 ft
- Condition
- About average for this time of year
- 7-day change
- +0.01 ft
- 30-day change
- -0.12 ft
- 1-year change
- +0.33 ft
Reading as of 2026-08-31 | NOAA CO-OPS (IGLD 1985)
- Since yesterday
- -0.02 ft
- 7-day change
- +0.01 ft
- 30-day change
- -0.12 ft
- 1-year change
- +0.33 ft
- Record high
- 577.71 ft
In brief
Lake St. Clair stood at 575.19 feet on Aug 31, 2026. That is higher than 52% of August readings since 1990.
Source: NOAA CO-OPS (IGLD 1985)
Lake level timeline
Records and averages
| Current level | 575.19 ft |
|---|---|
| Record high | 577.71 ft (2020-05-19) |
| Record low | 571.50 ft (2011-02-28) |
| Average of all readings | 574.66 ft |
| Data span | 36 years (13,390 readings) |
Level schematic
Frequently asked questions
Is Lake St. Clair full right now?
As of 2026-08-31, Lake St. Clair sits at 575.19 ft, which is about average for this time of year. Over the past 30 days the level has fallen 0.12 ft.
What is the water level at Lake St. Clair today?
The most recent reading at Lake St. Clair is 575.19 ft (2026-08-31), sourced from NOAA CO-OPS (IGLD 1985). Readings on this page refresh automatically as the agency publishes new data.
What is the highest Lake St. Clair has ever been?
The highest level for Lake St. Clair in our records is 577.71 ft on 2020-05-19. The lowest is 571.50 ft on 2011-02-28. Our record covers about 36 years of readings.
Is Lake St. Clair low for this time of year?
Compared with every August in our records, the current level is higher than 52% of them, which we classify as about average for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.
Why is Lake St. Clair changing right now?
Great Lakes levels move for three main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Lake St. Clair has fallen 0.12 ft over the past 30 days. For the operational reason on any given week, check NOAA CO-OPS (IGLD 1985) directly.
How much has Lake St. Clair changed over the past year?
Lake St. Clair is +0.33 ft compared with this date last year (575.19 ft today). The full-history chart above covers 36 years, with a record high of 577.71 ft and a record low of 571.50 ft.
Download and cite
Quote this reading
Lake St. Clair stood at 575.19 feet on Aug 31, 2026. That is higher than 52% of August readings since 1990.
Download the full record
lake-st-clair-mi-water-level-history.csv
How to cite
MyWaterLevel, “Lake St. Clair water level, 1990 to 2026,” data from NOAA CO-OPS (IGLD 1985), https://mywaterlevel.com/lake/mi/lake-st-clair/, accessed Oct 13, 2026.
Source: NOAA CO-OPS (IGLD 1985). All Michigan lake levels. Readings are provisional and may be revised. About our data and methods.