Live · updated daily from USGS
Swimmable water near you
2,136 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (8 hrs ago).
- Cold · below 60°F · 384
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 930
- 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.
- SALT POND A4 NR ALVISO CAUSGS gauge · California74°F31 mi1 day ago
- COYOTE C NR MADRONE CAUSGS gauge · California · 11 ft³/s70°F31 mi1 day ago
- COYOTE C AB HWY 237 A MILPITAS CAUSGS gauge · California · 8 ft³/s69°F33 mi1 day ago
- 72°F36 mi1 day ago
- SAN MATEO C BL LO CRYSTAL SP RES NR SAN MATEO CAUSGS gauge · California · 3 ft³/s63°F39 mi1 day ago
- PILARCITOS C BL STONE DAM NR HILLSBOROUGH CAUSGS gauge · California · 2 ft³/s60°F39 mi1 day ago
- ARROYO HONDO NR SAN JOSE CAUSGS gauge · California · 1 ft³/s65°F39 mi1 day ago
- ALAMEDA C BL CALAVERAS C NR SUNOL CAUSGS gauge · California · 8 ft³/s57°F40 mi1 day ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.7(1,756)Shark Fin Cove
Tiny, much-photographed beach known for a rock jutting out of the water & a sea cave that frames it.
1.3 mi from your location
4.6(214)Four Mile Beach
A mile-long stretch of white sand in Wilder Ranch State Park, a popular destination for surfers.
3.1 mi from your location
4.7(2,124)Natural Bridges State Beach
Compact sandy patch with rock bridges & tidepools, popular for spotting seabirds, whales & seals.
6.8 mi from your location
4.7(3,860)Lighthouse Field State Beach
Iconic spot with a lighthouse offers a variety of vistas & pathways for dog walking & strolling.
8.2 mi from your location
4.6(1,950)Seabright Beach
Sandy beach offering swimming, surfing & views of the Walton Lighthouse, plus seasonal lifeguards.
9.2 mi from your location
4.6(927)Twin Lakes State Beach
Wide, dog-friendly beach with cafes, sunset views & birdwatching trails around the adjacent lagoon.
9.7 mi from your location
4.6(650)Sunny Cove
This small, off-the-beaten-path spot for swimming & sunbathing is located beneath a pair of bluffs.
10 mi from your location
4.6(784)Capitola Beach
Popular beach located in Capitola Village features gentle surf, swimming & volleyball & shops.
12 mi from your location
4.6(4,777)Seacliff State Beach
Versatile state beach offers a variety of outdoor activities such as camping & hiking.
14 mi from your location
4.8(27)Hidden Beach
Pacific front sandy beach in a sheltered cove with a neighborhood park, benches & playground.
16 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.