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The linked gauge for Cottage Grove Lake reported 762.34 ft at its latest stored observation on Oct 9, 2026, on a falling 30-day trend (-10.40 ft).
Frost Advisory issued October 9 at 10:37AM PDT until October 11 at 9:00AM PDT by NWS Portland OR
Local gage height: 762.34 ft
-10.40 ft net change over past 30 days
Deepest basin sounding across ~1,150 acres
Refreshing (60–70°F) · Cool swim · Moderate comfort
COAST FORK WILLAMETTE R BLW COTTAGE GROVE DAM, OR · Oct 9, 6:40 PM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Wed, Oct 7, 2026 | 763.05 | -0.50 ft | Provisional |
| Tue, Oct 6, 2026 | 763.55 | -0.49 ft | Provisional |
| Mon, Oct 5, 2026 | 764.04 | -0.49 ft | Provisional |
| Sun, Oct 4, 2026 | 764.53 | -0.47 ft | Provisional |
| Sat, Oct 3, 2026 | 765.00 | -0.46 ft | Provisional |
| Fri, Oct 2, 2026 | 765.46 | -0.48 ft | Provisional |
| Thu, Oct 1, 2026 | 765.94 | -0.45 ft | Provisional |
| Wed, Sep 30, 2026 | 766.39 | -0.45 ft | Provisional |
| Tue, Sep 29, 2026 | 766.84 | -0.46 ft | Provisional |
| Mon, Sep 28, 2026 | 767.30 | -0.45 ft | Provisional |
| Sun, Sep 27, 2026 | 767.75 | -0.42 ft | Provisional |
| Sat, Sep 26, 2026 | 768.17 | -0.41 ft | Provisional |
| Fri, Sep 25, 2026 | 768.58 | -0.41 ft | Provisional |
| Thu, Sep 24, 2026 | 768.99 | — | Provisional |
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Fair for swimming (61/100), from 5 available inputs. Supporting this: Wind 1 mph from the north. 2% chance of precipitation. Working against it: Air temperature 57°F. Confidence is high (87%).