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The Water Around Us
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Live · updated daily from USGS

Swimmable water near you

2,135 USGS sensors are reporting a live water temperature right now, the newest reading from August 21, 2026 (18 hrs ago).

Clear location
  • Cold · below 60°F · 375
  • Cool · 60–69°F · 594
  • Comfortable · 70–86°F · 938
  • Warm · above 86°F · 228
  • You

A map of the United States with one coloured dot per USGS sensor reporting a live water temperature. The readings are listed below.

Nearest live readings

The closest USGS sensors currently reporting a water temperature, nearest first.

  1. COYOTE C NR MADRONE CAUSGS gauge · California · 11 ft³/s
    70°F39 mi19 hrs ago
  2. MUD SLOUGH NR GUSTINE CAUSGS gauge · California · 7 ft³/s
    77°F45 mi19 hrs ago
  3. SALT SLOUGH A HWY 165 NR STEVINSON CAUSGS gauge · California · 114 ft³/s
    75°F45 mi19 hrs ago
  4. SAN JOAQUIN R A FREMONT FORD BRIDGE CAUSGS gauge · California · 64 ft³/s
    76°F47 mi19 hrs ago
  5. SAN JOAQUIN R AB MERCED R NR NEWMAN CAUSGS gauge · California · 110 ft³/s
    75°F49 mi19 hrs ago
  6. SAN JOAQUIN R NR CROWS LANDING CAUSGS gauge · California · 278 ft³/s
    77°F54 mi19 hrs ago
  7. ARROYO HONDO NR SAN JOSE CAUSGS gauge · California · 1 ft³/s
    65°F60 mi19 hrs ago
  8. COYOTE C AB HWY 237 A MILPITAS CAUSGS gauge · California · 8 ft³/s
    69°F62 mi19 hrs ago

Nearest swimmable spots

Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.

No rated, photographed swim spots within 25 miles of this point yet. The nearest sensor readings above still tell you what the water is doing — or search any river, lake or beach by name.
Search a spot →

About this map

Every pin is a live reading from a USGS real-time monitoring station, captured in a daily snapshot. Colours follow the site’s cold-water-safety thresholds and describe the water at that one sensor — usually a river or stream gauge, not a swim beach — so treat them as a guide to what the water is doing nearby, not a verdict on a specific spot. Readings are provisional and can be revised by the USGS. Your location only sorts this page: the coordinates appear in the address bar (rounded to about a mile) and are not saved to an account or our database.

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.