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The linked gauge for Black Lake reported 244.39 ft (relative to IGLD 1985) at its latest stored observation on Oct 10, 2026, on a falling 30-day trend (-0.84 ft).
Local gage height: 244.39 ft
-0.84 ft net change over past 30 days
Verified freshwater recreation waterbody
Brisk (50–60°F) · Cold shock risk · Wetsuit recommended
Ogdensburg, NY · Oct 10, 2:36 PM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Fri, Oct 9, 2026 | 244.58 | -0.05 ft | Provisional |
| Thu, Oct 8, 2026 | 244.63 | +0.02 ft | Provisional |
| Wed, Oct 7, 2026 | 244.61 | +0.08 ft | Provisional |
| Tue, Oct 6, 2026 | 244.53 | -0.17 ft | Provisional |
| Mon, Oct 5, 2026 | 244.69 | +0.14 ft | Provisional |
| Sun, Oct 4, 2026 | 244.55 | +0.06 ft | Provisional |
| Sat, Oct 3, 2026 | 244.49 | -0.09 ft | Provisional |
| Fri, Oct 2, 2026 | 244.58 | +0.06 ft | Provisional |
| Thu, Oct 1, 2026 | 244.51 | +0.07 ft | Provisional |
| Wed, Sep 30, 2026 | 244.45 | +0.10 ft | Provisional |
| Tue, Sep 29, 2026 | 244.35 | +0.11 ft | Provisional |
| Mon, Sep 28, 2026 | 244.24 | +0.08 ft | Provisional |
| Sun, Sep 27, 2026 | 244.16 | -0.21 ft | Provisional |
| Sat, Sep 26, 2026 | 244.37 | — | Provisional |
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Poor for swimming (46/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 0% chance of precipitation. Working against it: Measured water temperature 58°F. Provisional data. Cold water hazard: thermal protection recommended below 60°F. Air temperature 50°F. Water temperature is 58°F (below 60°F). Immersion requires thermal protection. Confidence is moderate (77%) because some inputs are unavailable or older than ideal.