Loading page content…
Loading page content…
Loading lake conditions…
The linked gauge for Lake Mendota reported 850.14 ft at its latest stored observation on Oct 8, 2026, on a rising 30-day trend (+840.17 ft).
Local gage height: 850.14 ft
+840.17 ft net change over past 30 days
Deepest basin sounding across ~9,781 acres
Refreshing (60–70°F) · Cool swim · Moderate comfort
LAKE MONONA AT MADISON, WI · Oct 8, 2:00 PM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Fri, Oct 9, 2026 | 850.07 | -0.04 ft | Provisional |
| Fri, Oct 9, 2026 | 850.11 | +0.02 ft | Provisional |
| Thu, Oct 8, 2026 | 850.09 | -0.04 ft | Provisional |
| Thu, Oct 8, 2026 | 850.13 | +840.00 ft | Provisional |
| Thu, Oct 8, 2026 | 10.13 | -840.00 ft | 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. Wind 0 mph from the east-northeast. Working against it: Air temperature 51°F. Measured water temperature 62°F. Provisional data. Confidence is moderate (77%) because some inputs are unavailable or older than ideal.
| Wed, Oct 7, 2026 | 850.13 | -0.04 ft | Provisional |
| Wed, Oct 7, 2026 | 850.17 | +840.00 ft | Provisional |
| Wed, Oct 7, 2026 | 10.17 | -839.97 ft | Provisional |
| Tue, Oct 6, 2026 | 850.14 | -0.04 ft | Provisional |
| Tue, Oct 6, 2026 | 850.18 | +840.00 ft | Provisional |
| Tue, Oct 6, 2026 | 10.18 | -839.97 ft | Provisional |
| Mon, Oct 5, 2026 | 850.15 | -0.04 ft | Provisional |
| Mon, Oct 5, 2026 | 850.19 | +840.00 ft | Provisional |
| Mon, Oct 5, 2026 | 10.19 | — | Provisional |