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Lake levels › California › San Luis Reservoir

San Luis Reservoir water level today

493.49 ft above sea level (the reading for October 19, 2026). San Luis Reservoir is falling quickly: down 3.85 ft in the past 7 days and up 2.29 ft over 30 days.

California Department of Water Resources publishes one reading per day for San Luis Reservoir; today's value appears once the agency posts it, usually the next morning.

Level now493.49 ft
Past 24 hours−0.48 ft
Past 7 days−3.85 ft
Past 30 days+2.29 ft
vs 1 year ago+32.48 ft

San Luis Reservoir level over the last 12 months

453473492512531 Oct 25Dec 25Feb 26Apr 26Jun 26Aug 26Oct 26
Daily elevation in feet, last 12 months.

12-month low: 458.86 ft (November 12, 2025). High: 525.97 ft (March 25, 2026). Swing: 67.11 ft.

Daily San Luis Reservoir levels, last 30 days

DateElevation (ft)Change
Oct 19, 2026493.49−0.48 ft
Oct 18, 2026493.97−0.41 ft
Oct 17, 2026494.38−0.44 ft
Oct 16, 2026494.82−0.73 ft
Oct 15, 2026495.55−0.68 ft
Oct 14, 2026496.23−0.44 ft
Oct 13, 2026496.67−0.67 ft
Oct 12, 2026497.34−0.59 ft
Oct 11, 2026497.93−0.24 ft
Oct 10, 2026498.17−0.30 ft
Oct 9, 2026498.47−0.04 ft
Oct 8, 2026498.51±0.00 ft
Oct 7, 2026498.51+0.38 ft
Oct 6, 2026498.13+0.27 ft
Oct 5, 2026497.86+0.17 ft
Oct 4, 2026497.69+0.42 ft
Oct 3, 2026497.27+0.31 ft
Oct 2, 2026496.96+0.18 ft
Oct 1, 2026496.78+0.21 ft
Sep 30, 2026496.57+0.34 ft
Sep 29, 2026496.23+0.33 ft
Sep 28, 2026495.90+0.68 ft
Sep 27, 2026495.22+0.80 ft
Sep 26, 2026494.42+0.85 ft
Sep 25, 2026493.57+0.73 ft
Sep 24, 2026492.84+0.60 ft
Sep 23, 2026492.24+0.30 ft
Sep 22, 2026491.94+0.04 ft
Sep 21, 2026491.90+0.29 ft
Sep 20, 2026491.61+0.41 ft

Monthly average levels

MonthAverageLowHigh
Nov 2025466.04458.86479.85
Dec 2025482.25478.88490.25
Jan 2026500.03491.01507.72
Feb 2026512.02507.00519.30
Mar 2026524.00519.53525.97
Apr 2026522.69519.18525.31
May 2026509.59499.59518.93
Jun 2026487.05472.00499.32
Jul 2026467.66466.20471.05
Aug 2026472.05466.87480.29
Sep 2026489.30480.82496.57
Oct 2026 *496.78493.49498.51

* partial month or year.

San Luis Reservoir year by year

YearLowHighAverage
2026 *466.20 Jul 28525.97 Mar 25498.01
2025429.00 Jul 26528.08 Apr 7478.44
2024439.07 Aug 2500.37 Apr 9469.87
2023 *463.71 Dec 20503.90 Oct 16475.58

San Luis Reservoir on this date in past years

YearLevel on this dateToday vs then
2025461.01 ft+32.48 ft
2024456.45 ft+37.04 ft
2023500.00 ft−6.51 ft

Is San Luis Reservoir full?

California Department of Water Resources does not publish a full-pool figure in this data feed, so compare today's 493.49 ft with the 12-month range above (458.86 to 525.97 ft) and with past years.

Is San Luis Reservoir rising or falling?

San Luis Reservoir is falling quickly: down 3.85 ft in the past 7 days and up 2.29 ft over 30 days. In the latest day it moved −0.48 ft.

How does San Luis Reservoir compare with last year?

Compared with the same date last year, the lake is 32.48 ft higher. Two years ago on this date it stood at 456.45 ft.

Data source

California Department of Water Resources (California Data Exchange Center (CDEC)), gauge SNL; readings since Oct 16, 2023. Official source · how we collect it.

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