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The linked gauge for Arrowrock Reservoir reported 2945.43 ft at its latest stored observation on Oct 9, 2026, on a falling 30-day trend (-45.71 ft).
Local gage height: 2945.43 ft
-45.71 ft net change over past 30 days
Verified freshwater recreation waterbody
Brisk (50–60°F) · Cold shock risk · Wetsuit recommended
Nearby river temperature: 54.5°F at SF BOISE RIVER AT NEAL BRIDGE NR ARROWROCK DAM ID (14.1 mi away) · Oct 9, 2:45 PM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Fri, Oct 9, 2026 | 2945.44 | +0.03 ft | Provisional |
| Thu, Oct 8, 2026 | 2945.41 | +0.02 ft | Provisional |
| Wed, Oct 7, 2026 | 2945.39 | +0.06 ft | Provisional |
| Tue, Oct 6, 2026 | 2945.33 | +0.06 ft | Provisional |
| Mon, Oct 5, 2026 | 2945.27 | +0.03 ft | Provisional |
| Sun, Oct 4, 2026 | 2945.24 | +0.04 ft | Provisional |
| Sat, Oct 3, 2026 | 2945.20 | +0.03 ft | Provisional |
| Fri, Oct 2, 2026 | 2945.17 | -0.42 ft | Provisional |
| Thu, Oct 1, 2026 | 2945.59 | -0.38 ft | Provisional |
| Wed, Sep 30, 2026 | 2945.97 | +0.08 ft | Provisional |
| Tue, Sep 29, 2026 | 2945.89 | +0.98 ft | Provisional |
| Mon, Sep 28, 2026 | 2944.91 | +0.84 ft | Provisional |
| Sun, Sep 27, 2026 | 2944.07 | -0.18 ft | Provisional |
| Sat, Sep 26, 2026 | 2944.25 | — | Provisional |
Direct in-situ sensor data is required to compute numeric suitability.
Water temperature is not available from a verified source for this lake. No swimming score is shown without it.