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 22, 2026 (5 hrs ago).
- Cold · below 60°F · 384
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 931
- 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.
- TECOLOTE C AB FOOTBRIDGE NR SAN DIEGO CAUSGS gauge · California · 0 ft³/s68°F6.6 mi1 day ago
- SANTA MARGARITA R NR TEMECULA CAUSGS gauge · California · 3 ft³/s76°F42 mi1 day ago
- DEEP C NR HESPERIA CAUSGS gauge · California · 0 ft³/s79°F102 mi1 day ago
- MOJAVE R A LO NARROWS NR VICTORVILLE CAUSGS gauge · California · 4 ft³/s72°F118 mi1 day ago
- YUMA MAIN DRAIN ABOVE ARIZONA-SONORA BOUNDARYUSGS gauge · Arizona82°F146 mi1 day ago
- 80°F146 mi1 day ago
- 85°F147 mi1 day ago
- YUMA MESA OUTLET DRAIN NEAR YUMA, AZUSGS gauge · Arizona · 41 ft³/s88°F151 mi1 day ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.8(3,445)La Jolla Tide Pools
At low tide, this scenic, rocky beach features pools of water with sea life such as crabs & fish.
2.7 mi from your location
4.3(158)Pacific Beach Park
Public park/recreation center with basketball & tennis courts, a sports field, gyms & a weight room.
4.8 mi from your location
4.7(949)Law Street Beach
This coastal area with cliffs & grassy parkland is popular for surfing, sun-bathing & jogging.
4.8 mi from your location
4.6(2,357)De Anza Cove Park
Beachfront park offering volleyball courts, picnic space, a multiuse path, boat launch & playground.
5.4 mi from your location
4.8(1,057)Sea Grove Park
Oceanside park offering lawns for relaxing & picnicking along with beach access.
6.2 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.
6.5 mi from your location
4.7(6,003)Mission Beach Boardwalk
Longtime beachfront boardwalk featuring shops, an old-school amusement park & ocean activities.
6.7 mi from your location
4.7(7,179)Mission Beach Park
Large grassy space beside the beach boardwalk offers benches for picnics & recreational activities.
7.0 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.
7.1 mi from your location
4.8(3,100)Fletcher Cove Beach Park
Picturesque park with a viewing deck, grassy area & playground, plus tables & a basketball court.
8.5 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.