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The linked gauge for Lake Sammamish reported 25.86 ft at its latest stored observation on Oct 9, 2026, on a rising 30-day trend (+0.19 ft).
Local gage height: 25.86 ft
+0.19 ft net change over past 30 days
Verified freshwater recreation waterbody
Brisk (50–60°F) · Cold shock risk · Wetsuit recommended
Nearby river temperature: 58.5°F at DUWAMISH RIVER AT GOLF COURSE AT TUKWILA, WA (13.8 mi away) · Oct 9, 11:45 AM UTC
| Observation Date | Gage height (ft) | 24h Change | Approval Status |
|---|---|---|---|
| Fri, Oct 9, 2026 | 25.88 | 0.00 ft | Provisional |
| Thu, Oct 8, 2026 | 25.88 | 0.00 ft | Provisional |
| Wed, Oct 7, 2026 | 25.88 | 0.00 ft | Provisional |
| Tue, Oct 6, 2026 | 25.88 | 0.00 ft | Provisional |
| Mon, Oct 5, 2026 | 25.88 | 0.00 ft | Provisional |
| Sun, Oct 4, 2026 | 25.88 | +0.01 ft | Provisional |
| Sat, Oct 3, 2026 | 25.87 | 0.00 ft | Provisional |
| Fri, Oct 2, 2026 | 25.87 | 0.00 ft | Provisional |
| Thu, Oct 1, 2026 | 25.87 | 0.00 ft | Provisional |
| Wed, Sep 30, 2026 | 25.87 | 0.00 ft | Provisional |
| Tue, Sep 29, 2026 | 25.87 | 0.00 ft | Provisional |
| Mon, Sep 28, 2026 | 25.87 | 0.00 ft | Provisional |
| Sun, Sep 27, 2026 | 25.87 | -0.01 ft | Provisional |
| Sat, Sep 26, 2026 | 25.88 | — | 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.