Live · updated daily from USGS
Swimmable water near you
2,138 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (5 hrs ago).
- Cold · below 60°F · 384
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 932
- Warm · above 86°F · 215
- 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.
- ARROYO DE LA LAGUNA A VERONA CAUSGS gauge · California · 6 ft³/s71°F16 mi1 day ago
- SUISUN BAY A BENICIA BRIDGE NR BENICIA CAUSGS gauge · California68°F16 mi1 day ago
- ALAMEDA C NR NILES CAUSGS gauge · California · 12 ft³/s70°F18 mi1 day ago
- ALAMEDA C A SUNOL WATER TEMPLE A SUNOL CAUSGS gauge · California · 15 ft³/s69°F18 mi1 day ago
- ARROYO VALLE NR LIVERMORE CAUSGS gauge · California · 9 ft³/s61°F19 mi1 day ago
- 68°F20 mi1 day ago
- ALAMEDA C BL WELCH C NR SUNOL CAUSGS gauge · California · 7 ft³/s63°F22 mi1 day ago
- 65°F23 mi1 day ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.6(1,883)Alameda Beach
Long, sandy strip with volleyball courts, ending in a bird sanctuary & backed by fast-food places.
16 mi from your location
4.5(4,543)Robert W. Crown Memorial State Beach
This scenic park features a biking trail, plus areas for picnicking, swimming & water sports.
17 mi from your location
4.5(1,889)McLaughlin Eastshore State Park State Seashore
Shoreline refuge features tidal marshes, beaches & trails that provide panoramic views of the Bay.
18 mi from your location
4.6(1,992)Quarry Lakes Regional Recreation Area
Lakefront park offers 471 acres of space for picnicking, swimming, fishing & non-motorized boating.
18 mi from your location
4.7(475)Lake Elizabeth
Recreation area with a bird-filled island, plus a dog park, playgrounds, sports fields & boat ramp.
20 mi from your location
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.