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Weekly swim report · August 21, 2026

Colorado swim report

On August 21, 2026 the warmest USGS water reading in Colorado was 76°F at ARKANSAS RIVER BELOW JOHN MARTIN RESERVOIR, CO.; 1 water-related NWS hazard is active.

Warmest water

The 5 warmest of 113 sensors reporting a water temperature in Colorado today. Station names open the official monitoring page.

  1. #176°F 24°C9 hrs ago
  2. #275°F 24°C8 hrs ago
  3. #375°F 24°C9 hrs ago
  4. #474°F 24°C9 hrs ago
  5. #5
    SAN JUAN RIVER AT FOUR CORNERS, COUSGS gauge · 628 ft³/s
    74°F 23°C9 hrs ago

Active hazards in Colorado

Alerts cover counties or forecast zones — an alert for an area does not mean every river or beach inside it is affected. Times are local to the issuing office.

  • A Flood Advisory is in effect for Ouray, CO.

    NWS Grand Junction CO · until Aug 21, 3:45 PM

Where to swim in Colorado

The most-reviewed, well-rated water destinations in Colorado — check each one’s live conditions before you go.

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Conditions are for general information only and can change quickly. Always judge the water in person and follow posted advisories and local guidance before swimming or paddling.