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    Lake Mendocino scenic landscape
    Home>Lakes>Lake Mendocino>Water Level & Temperature
    Live Hydrology TelemetryLast updated: Oct 11, 2026 • 12:46 AM
    ← Lake Dashboard

    Lake Mendocino Water Level & Water Temperature

    California

    The linked gauge for Lake Mendocino reported 1322.80 ft at its latest stored observation on Oct 10, 2026, on a falling 30-day trend (-0.82 ft).

    Stage / Gage1322.80 ft
    30-Day Trend-0.82 ft
    BenchmarkSurvey Baseline
    Surface Temp62.1°F
    Monitoring Station
    USGS NWIS
    CLEAR LK A LAKEPORT CA
    Sensor ID11450000
    Distance22.2 mi away
    Vertical DatumNAVD88
    Photo: Randyd • CC BY-SA 3.0 via Wikimedia Commons
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    Latest Gage HeightWater Level
    1322.80FT GAGE

    Local gage height: 1322.80 ft

    Observed Oct 10, 4:15 PMHistory & Readings ↓
    30-Day TrendWater Level
    Falling-0.82 FT

    -0.82 ft net change over past 30 days

    30-Day WindowHistorical Trajectory
    Surface AreaWater Level
    1,822AC

    Verified freshwater recreation waterbody

    Basin MetricSurvey Reference
    Water TemperatureSensor Reading
    62.1°F

    Refreshing (60–70°F) · Cool swim · Moderate comfort

    Linked monitoring sensor

    Water Level

    Last 30 Days
    Surface elevation
    2.06 ft
    ↓ -0.8 ft (7 days)
    32.521.51Sep 11Sep 18Sep 26Oct 3Oct 102.1 ft
    Provisional USGS reading
    Daily History Table ↓

    Water Temperature (Surface)

    Surface temperature (Measured lake temperature)
    62.1°F
    Measured

    EF RUSSIAN R NR CALPELLA CA · Oct 10, 4:15 PM UTC

    7974706560Oct 3Oct 6Sep 29Oct 2Oct 562.1°F
    Historical daily
    7-Day forecast
    Forecast uncertainty
    Temperature Guide ↓

    30-Day Gage Height History

    Gage height in feet · Daily observations
    30d Range2.16 – 1323.53 ft
    1323.53 ft662.85 ft2.16 ftSep 11Sep 26Oct 10

    Recent Gage Height Readings

    Most recent linked-gauge observations, newest first. Gage height in ft .
    Observation DateGage height (ft)24h ChangeApproval Status
    Sat, Oct 10, 20261322.80-0.05 ftProvisional
    Fri, Oct 9, 20261322.85+1320.75 ftProvisional
    Fri, Oct 9, 20262.10-1320.77 ftProvisional
    Thu, Oct 8, 20261322.87+1320.74 ftProvisional
    Thu, Oct 8, 20262.13-0.03 ftProvisional
    Wed, Oct 7, 20262.16-1320.74 ftProvisional
    Wed, Oct 7, 20261322.90-0.01 ftProvisional
    Tue, Oct 6, 20261322.91+1320.74 ftProvisional
    Tue, Oct 6, 20262.17-0.04 ftProvisional
    Mon, Oct 5, 20262.21-1320.74 ftProvisional
    Mon, Oct 5, 20261322.95+1320.72 ftProvisional
    Sun, Oct 4, 20262.23-1320.74 ftProvisional
    Sun, Oct 4, 20261322.97+1320.71 ftProvisional
    Sat, Oct 3, 20262.26—Provisional

    Lake Mendocino Water Temperature & Seasonal Thermal Guide

    Seasonal thermal layers, limnology dynamics, and temperature benchmarks.
    Current verified surface temperature: 62.1°F(Refreshing (60–70°F))
    Linked monitoring sensor
    Summer Peak (Jun–Aug)68°F – 78°FPrime open water swimming, tubing, and shoreline wading.
    Fall Shoulder (Sep–Nov)56°F – 66°FCool water; active fall bass, trout, and walleye feeding transition.
    Spring Pre-Spawn (Apr–May)48°F – 58°FCold shock hazard; wetsuits recommended and USCG PFD required.
    Winter Min (Dec–Mar)34°F – 44°FSevere immersion hazard; possible surface freezing or ice cover.
    Limnological Note: In temperate freshwater lakes, the epilimnion (surface layer) warms quickly on sunny afternoons, while water below 15–20 feet remains 10–20°F cooler.

    Lake Mendocino Swimming & Immersion Suitability

    Real-time open water swimming readiness calculated from verified water temperature (62.1°F), cold shock hazards, and local atmospheric conditions for Lake Mendocino
    Forecast & Solar Times →
    72/ 100
    Fair
    Swimming Readiness:

    Current index calculated from verified local atmospheric, hydrographic & alert inputs.

    Fair for swimming (72/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 0% chance of precipitation. Working against it: Measured water temperature 62°F from a representative gauge 3.9 mi away. Provisional data. Air temperature 55°F. Confidence is moderate (75%) because some inputs are unavailable or older than ideal.

    Scoring Factors & Telemetry Inputs
    Storms and alertsNo alerts100% score
    Air temperature55°F34% score
    Water temperature62°F40% score
    Wind2 mph SSE98% score
    Precipitation chance0%100% score

    Lake Mendocino Telemetry & Sensor Provenance

    Physical in-situ monitoring equipment, benchmarks & sensor specifications
    Monitoring StationCLEAR LK A LAKEPORT CA
    Station IdentifierStation #11450000
    Coverage TypeDirect in-situ lake sensor
    Vertical DatumNot cataloged
    Sensor Coordinates39.0390° N, 122.9133° W
    Parameters TrackedGage Height / Water Level, 62615

    Frequently Asked Questions About Lake Mendocino Water

    Common questions about water levels, elevation, and swimming temperature
    What is the current water level at Lake Mendocino?+
    The linked gauge's latest stored gage height for Lake Mendocino is 1322.80 ft. Gage height is not water depth or automatically an elevation above sea level.
    How full is Lake Mendocino?+
    LakeRadar cannot determine how full Lake Mendocino is because a verified full-pool benchmark is not cataloged.
    What is the full pool elevation for Lake Mendocino?+
    A full-pool benchmark is not available from a verified source for Lake Mendocino.
    What is the water temperature of Lake Mendocino?+
    The linked sensor's latest stored water-temperature reading for Lake Mendocino is 62.1°F.
    How is Lake Mendocino's water level measured?+
    The linked gage-height observations for Lake Mendocino come from CLEAR LK A LAKEPORT CA (automated hydrological monitoring network). LakeRadar stores normalized telemetry from verified in-situ hydrographic sensors.

    Real-time hydrological water levels, surface temperatures, atmospheric forecasts, and marine safety conditions. Return to Lake Mendocino Dashboard → · Boating Outlook → · Sailing Guide → · Weather & Forecast → · Fishing Forecast → · Radar & Map →