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Castaic Lake Water Level Today

Daily level, distance to full pool and history for Castaic Lake, on the Castaic Creek (Santa Clara River basin) in California.

Updated · Source: CDEC station CAS Provisional

Water level Provisional

1,488.18ft

msl · 7:00 AM PST, Nov 9, 2026

  • 26.82 ftbelow full pool (1,515.0 ft)
  • −0.72 ftin 24 h−4.51 ft in 7 days−17.45 ft in 30 days
1,4801,4901,5001,5101,5201,5301,4801,4901,5001,5101,5201,5301,4801,4901,5001,5101,5201,530
  • Full pool
  • 1 yr ago

Is Castaic Lake full?

No. Castaic Lake is 26.82 ft below full pool (1,515.0 ft). It is 4.82 ft higher than a year ago (1,483.36 ft on Nov 9, 2025).

Castaic Lake level history

Full pool 1,515.0 ft
View data table
DateLevel (ft)
Nov 9, 20261,488.18
Nov 8, 20261,488.73
Nov 7, 20261,489.40
Nov 6, 20261,490.12
Nov 5, 20261,490.78
Nov 4, 20261,491.40
Nov 3, 20261,492.04
Nov 2, 20261,492.57
Nov 1, 20261,493.18
Oct 31, 20261,493.78
Oct 30, 20261,494.35
Oct 29, 20261,494.96
Oct 28, 20261,495.58
Oct 27, 20261,496.22
Oct 26, 20261,496.87
Oct 25, 20261,497.45
Oct 24, 20261,497.98
Oct 23, 20261,498.53
Oct 22, 20261,499.05
Oct 21, 20261,499.53
Oct 20, 20261,500.18
Oct 19, 20261,500.90
Oct 18, 20261,501.62
Oct 17, 20261,502.32
Oct 16, 20261,503.07
Oct 15, 20261,503.85
Oct 14, 20261,504.48
Oct 13, 20261,504.11
Oct 12, 20261,504.56
Oct 11, 20261,505.31
Oct 10, 20261,505.63
  • Castaic Lake level
  • Full pool 1,515.0 ft
  • Above full pool
Source: CDEC · Daily averages since 2007

Castaic Lake on Nov 9 in past years

Castaic Lake water level on Nov 9 in past years
YearLevel (ft)vs todayvs full pool
2026today1,488.18—−26.82 ft
20251,483.36−4.82−31.64 ft
20241,486.86−1.32−28.14 ft
20231,492.45+4.27−22.55 ft
20221,394.05−94.13−120.95 ft
20211,377.72−110.46−137.28 ft
20201,478.37−9.81−36.63 ft
20191,489.13+0.95−25.87 ft
20181,486.02−2.16−28.98 ft
20171,494.82+6.64−20.18 ft
20161,469.44−18.74−45.56 ft

Today’s level is the highest for this date since 2023.

Lake facts

Full pool (conservation pool)
1,515.0 ft msl
Highest since 2007
1,512.04 ftJun 11, 2025
Lowest since 2007
1,368.60 ftFeb 28, 2016
Data since
Oct 24, 2007
Dam
Castaic Damcompleted 1973
River
Castaic Creek (Santa Clara River basin)
Owned by
California Department of Water Resources
Dam location
Los Angeles County
Gauge location
34.5152, −118.6101

Dam, river and owner from the National Inventory of Dams (USACE). Records cover Oct 24, 2007 to today (daily averages).

Castaic Lake map and depth

  • Dam
  • Level gauge
Shoreline © OpenStreetMap contributors · Open the full map
Average depth when full
about 146 ftcapacity ÷ surface area
Surface area
about 2,230 acresmeasured on the OpenStreetMap outline
Height of Castaic Dam
340 ftNational Inventory of Dams

The outline shows the mapped shoreline, not today’s water line: when the lake is low, the water stands back from it.

Weather on the lake

  1. Today85°FHighLow 54°FN 5–15 mphMostly Sunny
  2. Tonight54°FLowNNW 5–10 mphPartly Cloudy
  3. Tuesday85°FHighLow 56°FNNE 10–15 mphSunny
  4. Wednesday83°FHighLow 54°FNE 5–10 mphSunny
  5. Thursday78°FHighLow 53°FE 5–10 mphSunny
  6. Friday75°FHighLow 53°FENE 5 mphMostly Sunny
  7. Saturday74°FHighLow 52°FESE 0–10 mphMostly Sunny

Forecast: National Weather Service for the dam area (34.52, −118.61). Wind speeds are forecasts, not measurements.

Nearby lakes

Quick answers

What is the full pool level of Castaic Lake?
1,515.0 ft above mean sea level, the top of its conservation pool. Above it, water is released or flows over the spillway of Castaic Dam.
How much does Castaic Lake need to be full?
Castaic Lake needs 26.82 ft more water to reach full pool (1,515.0 ft), as of Nov 9, 2026.
How deep is Castaic Lake?
Castaic Lake is about 146 ft deep on average when full: 325,000 acre-ft of storage spread over about 2,230 acres of surface. As in most reservoirs, the deepest water is in the old river channel near Castaic Dam.
Is Castaic Lake rising or falling?
It is falling: −4.51 ft in the last 7 days and −0.72 ft in 24 hours, to 1,488.18 ft on 7:00 AM PST, Nov 9, 2026 (California Data Exchange Center).
What is the highest level in our data?
Castaic Lake reached 1,512.04 ft on Jun 11, 2025. The lowest was 1,368.60 ft on Feb 28, 2016 (CDEC data since 2007; older records are not in this data set).
How much has Castaic Lake changed in the last year?
In the last 12 months it ranged from 1,475.01 ft (Dec 8, 2025) to 1,508.98 ft (Sep 19, 2026), a swing of 33.97 ft.
How often is this page updated?
This page is updated several times a day with the latest reading from California Data Exchange Center. The last reading is from 7:00 AM PST, Nov 9, 2026.

Where this data comes from

Hourly reservoir elevation from the California Data Exchange Center of the California Department of Water Resources (station CAS, cdec.water.ca.gov). Recent readings are provisional and may be revised. Weather from the National Weather Service. Dam details from the National Inventory of Dams.

Lake Levels Daily is an independent site, not affiliated with TWDB, LCRA, USACE, USGS, NOAA, TVA or any lake operator. Check official sources before making safety decisions.