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 (11 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°F34 mi12 hrs ago
- COYOTE C AB HWY 237 A MILPITAS CAUSGS gauge · California · 8 ft³/s69°F50 mi12 hrs ago
- SALT POND A4 NR ALVISO CAUSGS gauge · California74°F51 mi11 hrs ago
- ARROYO HONDO NR SAN JOSE CAUSGS gauge · California · 1 ft³/s65°F53 mi12 hrs ago
- ALAMEDA C AB DIV DAM NR SUNOL CAUSGS gauge · California · 0 ft³/s64°F55 mi11 hrs ago
- ALAMEDA C BL DIV DAM NR SUNOL CAUSGS gauge · California · 0 ft³/s67°F55 mi12 hrs ago
- CALAVERAS C NR SUNOL CAUSGS gauge · California · 7 ft³/s56°F55 mi11 hrs ago
- ALAMEDA C BL CALAVERAS C NR SUNOL CAUSGS gauge · California · 8 ft³/s57°F56 mi12 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(3,158)Marina State Beach
Relaxing, family-friendly destination offers a public beach & park good for all-ages entertainment.
0.3 mi from your location
4.5(887)Salinas River State Beach
Popular destination for bird-watching, fishing & horseback riding, with a dune trail & picnic area.
5.3 mi from your location
4.6(1,231)Monterey State Beach
Miles of scenic coastline offer beachgoers recreational activities ranging from surfing to fishing.
6.6 mi from your location
4.7(1,562)San Carlos Beach Park
2.87-acre city park offering footpaths, benches, landscaped turf & scenic bay views.
7.8 mi from your location
4.8(1,465)Lovers Point Beach
Quaint public beach with a rocky point break popular with surfers, swimmers & boaters.
7.8 mi from your location
4.6(2,155)Del Monte Beach
Strip of beach with boardwalk pathways through sand dunes, plus wildlife & picnic areas.
8.1 mi from your location
4.8(3,025)Asilomar State Beach
Tranquil place featuring a 1-mi. stretch of sandy beach & rocky coves, along with a walking trail.
9.2 mi from your location
4.7(2,850)Sunset State Beach
Beach surrounded by steep sand dunes offering picnic areas & campsites, plus bay & mountain views.
13 mi from your location
4.8(2,910)Carmel River State Beach
This mile-long beach offers bird watching opportunities & a popular scuba diving entry point.
13 mi from your location
4.2(174)Sunset State Beach Campground
Tranquil beach campground providing tent & RV sites, picnic spots & ocean fishing with a permit.
13 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.