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The linked gauge for Upper Klamath Lake reported 4140.80 ft at its latest stored observation on Oct 9, 2026, on a falling 30-day trend (-0.34 ft).
Local gage height: 4140.80 ft
-0.34 ft net change over past 30 days
Verified freshwater recreation waterbody
Refreshing (60–70°F) · Cool swim · Moderate comfort
Last observed: 64.6°F at UPPER KLAMATH LAKE AT HOWARD BAY, OR on Oct 7, 7:00 PM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Wed, Oct 7, 2026 | 4140.83 | -0.01 ft | Provisional |
| Tue, Oct 6, 2026 | 4140.84 | -0.02 ft | Provisional |
| Mon, Oct 5, 2026 | 4140.86 | -0.02 ft | Provisional |
| Sun, Oct 4, 2026 | 4140.88 | -0.01 ft | Provisional |
| Sat, Oct 3, 2026 | 4140.89 | -0.02 ft | Provisional |
| Fri, Oct 2, 2026 | 4140.91 | -0.02 ft | Provisional |
| Thu, Oct 1, 2026 | 4140.93 | -0.01 ft | Provisional |
| Wed, Sep 30, 2026 | 4140.94 | -0.01 ft | Provisional |
| Tue, Sep 29, 2026 | 4140.95 | -0.03 ft | Provisional |
| Mon, Sep 28, 2026 | 4140.98 | -0.02 ft | Provisional |
| Sun, Sep 27, 2026 | 4141.00 | -0.02 ft | Provisional |
| Sat, Sep 26, 2026 | 4141.02 | -0.01 ft | Provisional |
| Fri, Sep 25, 2026 | 4141.03 | -0.01 ft | Provisional |
| Thu, Sep 24, 2026 | 4141.04 | — | Provisional |
Direct in-situ sensor data is required to compute numeric suitability.
Water temperature is not available from a verified source for this lake. No swimming score is shown without it.