Last reading · NGVD29
Folsom Lake Water Level Today
The last reading for Folsom Lake, the American River reservoir behind Folsom Dam, was 402.89 ft (NGVD29) on Oct 16, 2026. Folsom Lake is 5.25 ft lower than on the same date last year.
402.89 ft
NGVD29
402.89 ft
Oct 16, 2026 PDT
- 7-day change−2.19 ftOct 9, 2026
- 30-day change−5.79 ftSep 16, 2026
- Vs last year−5.25 ftOct 16, 2025
- ReadingOct 16, 2026402.89 ft
Folsom Lake Level vs Last Year & Historical Average
Comparisons for Folsom Lake use the same NGVD29 series as the chart. The series begins Oct 1, 2015 and has 4031 daily values. Folsom Lake is 5.25 ft lower than on the same date last year. In that window, the lowest daily level was 370.28 ft on Oct 21, 2021, and the highest was 464.40 ft on May 12, 2026.
| Mark | Date | Elevation | Vs latest |
|---|---|---|---|
| Latest reading | Oct 16, 2026 | 402.89 ft | — |
| 7 days earlier | Oct 9, 2026 | 405.08 ft | −2.19 ft |
| 30 days earlier | Sep 16, 2026 | 408.68 ft | −5.79 ft |
| 1 year earlier | Oct 16, 2025 | 408.14 ft | −5.25 ft |
| Same-day mean (11 years) | — | 402.08 ft | +0.81 ft |
Folsom Lake Water Level Chart
Daily elevation Latest
| Start | End | Low | High | Days |
|---|---|---|---|---|
| Sep 17, 2026 | Oct 16, 2026 | 402.89 ft | 408.55 ft | 29 |
| Start | End | Low | High | Days |
|---|---|---|---|---|
| Oct 16, 2025 | Oct 16, 2026 | 402.89 ft | 464.40 ft | 363 |
| Start | End | Low | High | Days |
|---|---|---|---|---|
| Oct 18, 2016 | Oct 16, 2026 | 370.28 ft | 464.40 ft | 3648 |
Monthly High, Low, and Average
Each row is the high, low, and average of the daily Folsom Lake elevations in that month (Oct 2025 through Oct 2026). The lowest monthly average in this table is Oct 2026 at 404.99 ft (16 days). The highest monthly average is May 2026 at 463.57 ft.
| Month | High | Low | Average |
|---|---|---|---|
| Oct 2025 | 409.15 | 406.11 | 407.87 |
| Nov 2025 | 410.81 | 404.92 | 407.37 |
| Dec 2025 | 422.14 | 410.94 | 414.06 |
| Jan 2026 | 431.61 | 422.92 | 426.62 |
| Feb 2026 | 433.35 | 418.06 | 423.14 |
| Mar 2026 | 451.15 | 435.06 | 445.29 |
| Apr 2026 | 461.04 | 451.97 | 458.15 |
| May 2026 | 464.40 | 461.44 | 463.57 |
| Jun 2026 | 463.64 | 455.58 | 461.46 |
| Jul 2026 | 454.90 | 433.84 | 444.97 |
| Aug 2026 | 433.02 | 411.78 | 420.81 |
| Sep 2026 | 411.42 | 406.76 | 408.99 |
| Oct 2026 | 406.65 | 402.89 | 404.99 |
About This Data
| Agency | U.S. Bureau of Reclamation |
|---|---|
| Station | Folsom Lake Dam and Powerplant (10775) |
| Parameter | RISE item 10775, lake/reservoir elevation, daily instant, feet |
| Datum | NGVD29 |
| Formula | U.S. Bureau of Reclamation project datum for Folsom Dam. |
| Full pool | Not confirmed in the fetched sources. |
| Full-pool source | — |
| Latest reading | Oct 16, 2026 PDT (2026-10-16 08:00 UTC) |
| Series file | data/raw/folsom-lake/rise-10775-20261017T132852Z.csv, data/raw/folsom-lake/full-pool-20261017T132852Z.html |
| Note | Provisional data, subject to revision. |
How We Calculate These Numbers
Daily history for Folsom Lake uses the Bureau of Reclamation's daily elevation values from RISE. This page doesn't show a full-pool line because the fetched sources didn't confirm one on this datum. The same-day mean at Folsom Lake uses 11 readings on this calendar day from 2015 through 2025 and equals 402.08 ft. All of these figures come from station 10775. Percent full is shown only when an agency published it; it is never estimated by dividing elevation by a pool elevation.
FAQ
Is Folsom Lake higher than last year?
No, Folsom Lake is lower than last year. On Oct 16, 2025 it was 408.14 ft; on Oct 16, 2026 it is 402.89 ft (−5.25 ft).
Where does the Folsom Lake data come from?
U.S. Bureau of Reclamation station 10775, RISE item 10775, lake/reservoir elevation, daily instant, feet. The datum is NGVD29. Provisional data are subject to revision.
Nearby Lakes
| Lake | Level | Reading | Distance |
|---|---|---|---|
| Shasta Lake | 977.24 ft | Oct 16, 2026 | 155 mi |
| Lake Mead | 1,037.53 ft | Oct 15, 2026 | 399 mi |
| Lake Powell | 3,520.02 ft | Oct 16, 2026 | 550 mi |
| Elephant Butte Reservoir | 4,296.00 ft | Oct 16, 2026 | 868 mi |