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The linked gauge for Lake Michigan - Illinois Shoreline reported 0.32 ft at its latest stored observation on Oct 9, 2026, on a falling 30-day trend (-0.35 ft).
Local gage height: 0.32 ft
-0.35 ft net change over past 30 days
Deepest basin sounding across ~14,338,560 acres
Refreshing (60–70°F) · Cool swim · Moderate comfort
NOAA GLERL GLSEA surface temperature at 41.902, -87.599 · Oct 7, 12:00 PM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Wed, Oct 7, 2026 | 0.37 | +0.04 ft | Provisional |
| Tue, Oct 6, 2026 | 0.33 | -0.16 ft | Provisional |
| Mon, Oct 5, 2026 | 0.49 | -0.06 ft | Provisional |
| Sun, Oct 4, 2026 | 0.55 | -0.07 ft | Provisional |
| Sat, Oct 3, 2026 | 0.62 | -0.16 ft | Provisional |
| Fri, Oct 2, 2026 | 0.78 | +0.10 ft | Provisional |
| Thu, Oct 1, 2026 | 0.68 | +0.17 ft | Provisional |
| Wed, Sep 30, 2026 | 0.51 | -0.15 ft | Provisional |
| Tue, Sep 29, 2026 | 0.66 | -0.06 ft | Provisional |
| Mon, Sep 28, 2026 | 0.72 | -0.05 ft | Provisional |
| Sun, Sep 27, 2026 | 0.77 | -0.03 ft | Provisional |
| Sat, Sep 26, 2026 | 0.80 | -0.05 ft | Provisional |
| Fri, Sep 25, 2026 | 0.85 | -0.10 ft | Provisional |
| Thu, Sep 24, 2026 | 0.95 | — | Provisional |
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Good for swimming (75/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 1% chance of precipitation. Confidence is moderate (81%) because some inputs are unavailable or older than ideal.