Reservoir · California · United States · CDEC
Folsom Lake
63.9% full
Capacity
1,205.06 hm³
Volume stored
771 hm³
Coordinates
38.683°N, 121.183°W
Last updated
2026-08-03
Current fill
63.9%vs 7 days ago
-5.8%losing
vs 1 year ago
+7.0%year-over-year
7-day trend
↓falling
Data source: CDEC — California Dept of Water Resources — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-08-03.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.683, -121.183 · Open in Google Maps
About Folsom Lake
As of August 3, 2026, Folsom Lake is filled to 63.9% of its total capacity, holding roughly 771 hm³ of water out of a maximum 1,205 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 5.8 percentage points, and it is 7.0 points above its level on the same date a year earlier.
Across the readings we hold for Folsom Lake — 1825 data points between August 5, 2021 and August 3, 2026 — the level has ranged from a low of 21.9% (October 21, 2021) to a high of 98.2% (May 12, 2026). On average the reservoir is fullest around June and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 38.683°N, 121.183°W.
Key facts
- Current fill level
- 63.9%
- Water stored
- 771 hm³
- Total capacity
- 1,205 hm³
- 7-day change
- ▼ 5.8 pts
- Year-on-year
- ▲ 7.0 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 38.683°N, 121.183°W
- Last updated
- August 3, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 3 Aug 2026 | 63.9% | 771 |
| 2 Aug 2026 | 64.8% | 780 |
| 1 Aug 2026 | 65.6% | 791 |
| 31 Jul 2026 | 66.4% | 800 |
| 30 Jul 2026 | 67.2% | 809 |
| 29 Jul 2026 | 68.0% | 819 |
| 28 Jul 2026 | 68.8% | 829 |
| 27 Jul 2026 | 69.7% | 840 |
| 26 Jul 2026 | 70.5% | 849 |
| 25 Jul 2026 | 71.2% | 858 |
| 24 Jul 2026 | 71.8% | 866 |
| 23 Jul 2026 | 72.6% | 874 |
Frequently asked questions
What is the current water level of Folsom Lake?
As of August 3, 2026, Folsom Lake is at 63.9% of its capacity, holding approximately 771 hm³ of water, according to CDEC (CA DWR) data.
Is Folsom Lake reservoir full?
No. As of August 3, 2026, Folsom Lake is within its normal operating range at 63.9% of its capacity, so it is not full.
Is the water level at Folsom Lake rising or falling?
The level at Folsom Lake is falling — it dropped 5.8 percentage points over the latest week on record.
How much water can Folsom Lake hold?
Folsom Lake has a total capacity of 1,205 hm³.
Where is Folsom Lake reservoir located?
Folsom Lake is located in California, United States, within the California basin (coordinates 38.683°N, 121.183°W).
What is Folsom Lake used for?
Folsom Lake is used primarily for multiple purposes, and is managed by CDEC.