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The linked gauge for Manistee Lake reported 578.88 ft (relative to IGLD 1985) at its latest stored observation on Oct 9, 2026, on a falling 30-day trend (-0.52 ft).
Local gage height: 578.88 ft
-0.52 ft net change over past 30 days
Deepest basin sounding across ~930 acres
Brisk (50–60°F) · Cold shock risk · Wetsuit recommended
L MANISTEE R AT NINE MILE BRIDGE NR FREESOIL, MI · Oct 9, 8:30 AM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Thu, Oct 8, 2026 | 578.97 | -0.11 ft | Provisional |
| Wed, Oct 7, 2026 | 579.08 | +0.04 ft | Provisional |
| Tue, Oct 6, 2026 | 579.04 | +0.06 ft | Provisional |
| Mon, Oct 5, 2026 | 578.97 | -0.23 ft | Provisional |
| Sun, Oct 4, 2026 | 579.20 | +0.10 ft | Provisional |
| Sat, Oct 3, 2026 | 579.11 | -0.07 ft | Provisional |
| Fri, Oct 2, 2026 | 579.17 | -0.05 ft | Provisional |
| Thu, Oct 1, 2026 | 579.23 | +0.02 ft | Provisional |
| Wed, Sep 30, 2026 | 579.21 | +0.06 ft | Provisional |
| Tue, Sep 29, 2026 | 579.15 | -0.02 ft | Provisional |
| Mon, Sep 28, 2026 | 579.17 | -0.05 ft | Provisional |
| Sun, Sep 27, 2026 | 579.21 | 0.00 ft | Provisional |
| Sat, Sep 26, 2026 | 579.21 | -0.06 ft | Provisional |
| Fri, Sep 25, 2026 | 579.27 | — | Provisional |
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Very Poor / Avoid for swimming (21/100), from 5 available inputs. Supporting this: No active official alerts for this lake. Wind 0 mph from the south-southeast. Working against it: Measured water temperature 51°F from a representative gauge 14.5 mi away. Provisional data. Immersion shock hazard: water below 55°F poses severe cold shock and rapid hypothermia risk. Air temperature 43°F. Water temperature is 51°F (below 55°F). Severe cold shock and hypothermia hazard upon immersion. Confidence is high (86%).