Live · updated daily from USGS
Swimmable water near you
2,137 USGS sensors are reporting a live water temperature right now, the newest reading from August 21, 2026 (8 hrs ago).
- Cold · below 60°F · 375
- Cool · 60–69°F · 595
- Comfortable · 70–86°F · 938
- Warm · above 86°F · 229
- 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.
- TECOLOTE C AB FOOTBRIDGE NR SAN DIEGO CAUSGS gauge · California · 0 ft³/s68°F15 mi9 hrs ago
- SANTA MARGARITA R NR TEMECULA CAUSGS gauge · California · 3 ft³/s76°F62 mi9 hrs ago
- DEEP C NR HESPERIA CAUSGS gauge · California · 0 ft³/s79°F122 mi9 hrs ago
- YUMA MAIN DRAIN ABOVE ARIZONA-SONORA BOUNDARYUSGS gauge · Arizona82°F136 mi9 hrs ago
- 80°F137 mi9 hrs ago
- MOJAVE R A LO NARROWS NR VICTORVILLE CAUSGS gauge · California · 4 ft³/s72°F138 mi8 hrs ago
- 85°F140 mi9 hrs ago
- YUMA MESA OUTLET DRAIN NEAR YUMA, AZUSGS gauge · Arizona · 41 ft³/s88°F144 mi8 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.6(2,808)Chula Vista Bayside Park
Public greenway with paved walking trails, a fishing pier & picnic tables, plus bay & city views.
3.5 mi from your location
4.6(4,279)Silver Strand State Beach
Sandy space with ocean & bay shorelines offering fishing, swimming & picnicking, plus RV camping.
4.2 mi from your location
4.7(789)Glorietta Bay Park
Bayside playground with a boat ramp & picnic area, plus views of downtown San Diego.
7.0 mi from your location
4.7(2,017)Harbor Island Park
Tranquil public park overlooking the bay with a shoreline path for walkers & a route for bicyclists.
11 mi from your location
4.6(1,670)Fiesta Island
Vast island off Mission Bay with fire pits, dog parks, various water sports & 27 miles of beach.
14 mi from your location
4.7(7,179)Mission Beach Park
Large grassy space beside the beach boardwalk offers benches for picnics & recreational activities.
15 mi from your location
4.6(1,879)Ski Beach Park
Small island park offering a boat launch, playground, jogging path, picnic space & large grass area.
15 mi from your location
4.7(6,003)Mission Beach Boardwalk
Longtime beachfront boardwalk featuring shops, an old-school amusement park & ocean activities.
15 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.



