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The linked gauge for Long Lake reported 578.95 ft (relative to IGLD 1985) at its latest stored observation on Oct 10, 2026, on a falling 30-day trend (-0.29 ft).
Local gage height: 578.95 ft
-0.29 ft net change over past 30 days
Verified freshwater recreation waterbody
Refreshing (60–70°F) · Cool swim · Moderate comfort
Alpena, MI · Oct 10, 1:00 PM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Fri, Oct 9, 2026 | 578.99 | +0.04 ft | Provisional |
| Thu, Oct 8, 2026 | 578.94 | -0.05 ft | Provisional |
| Wed, Oct 7, 2026 | 578.99 | -0.04 ft | Provisional |
| Tue, Oct 6, 2026 | 579.03 | +0.01 ft | Provisional |
| Mon, Oct 5, 2026 | 579.02 | +0.09 ft | Provisional |
| Sun, Oct 4, 2026 | 578.93 | -0.12 ft | Provisional |
| Sat, Oct 3, 2026 | 579.05 | +0.09 ft | Provisional |
| Fri, Oct 2, 2026 | 578.97 | -0.03 ft | Provisional |
| Thu, Oct 1, 2026 | 579.00 | +0.03 ft | Provisional |
| Wed, Sep 30, 2026 | 578.97 | 0.00 ft | Provisional |
| Tue, Sep 29, 2026 | 578.97 | +0.03 ft | Provisional |
| Mon, Sep 28, 2026 | 578.94 | +0.03 ft | Provisional |
| Sun, Sep 27, 2026 | 578.91 | -0.01 ft | Provisional |
| Sat, Sep 26, 2026 | 578.92 | — | Provisional |
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Fair for swimming (71/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 1% chance of precipitation. Working against it: Measured water temperature 60°F. Provisional data. Confidence is moderate (77%) because some inputs are unavailable or older than ideal.