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.
- COYOTE C NR MADRONE CAUSGS gauge · California · 11 ft³/s70°F24 mi8 hrs ago
- SALT POND A4 NR ALVISO CAUSGS gauge · California74°F32 mi8 hrs ago
- COYOTE C AB HWY 237 A MILPITAS CAUSGS gauge · California · 8 ft³/s69°F32 mi9 hrs ago
- ARROYO HONDO NR SAN JOSE CAUSGS gauge · California · 1 ft³/s65°F37 mi9 hrs ago
- 72°F38 mi9 hrs ago
- CALAVERAS C NR SUNOL CAUSGS gauge · California · 7 ft³/s56°F39 mi8 hrs ago
- ALAMEDA C BL CALAVERAS C NR SUNOL CAUSGS gauge · California · 8 ft³/s57°F39 mi9 hrs ago
- ALAMEDA C BL DIV DAM NR SUNOL CAUSGS gauge · California · 0 ft³/s67°F39 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(650)Sunny Cove
This small, off-the-beaten-path spot for swimming & sunbathing is located beneath a pair of bluffs.
0.1 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.
0.5 mi from your location
4.6(1,950)Seabright Beach
Sandy beach offering swimming, surfing & views of the Walton Lighthouse, plus seasonal lifeguards.
1.0 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.
2.2 mi from your location
4.6(784)Capitola Beach
Popular beach located in Capitola Village features gentle surf, swimming & volleyball & shops.
2.3 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.
3.8 mi from your location
4.6(4,777)Seacliff State Beach
Versatile state beach offers a variety of outdoor activities such as camping & hiking.
4.3 mi from your location
4.8(27)Hidden Beach
Pacific front sandy beach in a sheltered cove with a neighborhood park, benches & playground.
5.6 mi from your location
4.7(1,475)Manresa Main State Beach
Sandy stretch with unpredictable weather that's popular for surf fishing, surfing & sunsets.
7.3 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.
7.3 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.