Lake Marion Water Level
South Carolina · updated daily from the U.S. Geological Survey
74.22 ft
Lake Marion is below average for this time of year and rising (+0.20 ft in the last 7 days).
Change since yesterday: +0.01 ft
Reading as of 2026-08-14 · higher than 27% of August readings on record
Where Lake Marion sits historically
Today's level compared with every reading in our 28.1-year record for this lake.
Since yesterday
+0.01 ft
7-day change
+0.20 ft
30-day change
-0.11 ft
1-year change
-1.93 ft
Last 30 days
Last 12 months
Full history (28.1 years)
Lake Marion records and averages
| Current level | 74.22 ft |
|---|---|
| Record high | 76.98 ft (2016-01-04) |
| Record low | 66.76 ft (2007-12-24) |
| Average of all readings | 74.63 ft |
| Data span | 28.1 years (8,221 readings) |
Frequently asked questions
Is Lake Marion full right now?
As of 2026-08-14, Lake Marion sits at 74.22 ft, which is below average for this time of year.Over the past 30 days the level has fallen 0.11 ft.
What is the water level at Lake Marion today?
The most recent reading is 74.22 ft (2026-08-14), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Lake Marion has ever been?
The highest level in our records is 76.98 ft on 2016-01-04. The lowest is 66.76 ft on 2007-12-24. Our record covers about 28.1 years of readings.
Is Lake Marion low for this time of year?
Compared with every August in our records, the current level is higher than 27% of them — below 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 Marion changing right now?
Reservoir levels move for four 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 Marion has fallen 0.11 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Lake Marion changed over the past year?
The level is -1.93 ft compared with this date last year (74.22 ft today). The full-history chart above covers 28.1 years, with a record high of 76.98 ft and a record low of 66.76 ft.
Nearby lakes in South Carolina
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All South Carolina lake levels.