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 (9 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.
- EF RUSSIAN R NR CALPELLA CAUSGS gauge · California · 32 ft³/s69°F34 mi10 hrs ago
- SF EEL R NR BRANSCOMB CAUSGS gauge · California · 0 ft³/s66°F34 mi10 hrs ago
- ELDER C NR BRANSCOMB CAUSGS gauge · California · 1 ft³/s62°F35 mi10 hrs ago
- RUSSIAN R NR HOPLAND CAUSGS gauge · California · 121 ft³/s59°F37 mi9 hrs ago
- RUSSIAN R NR CLOVERDALE CAUSGS gauge · California · 120 ft³/s65°F45 mi10 hrs ago
- DRY C BLW LAMBERT BR NR GEYSERVILLE CAUSGS gauge · California · 92 ft³/s57°F60 mi10 hrs ago
- 009N009W02F001MUSGS gauge · California63°F64 mi10 hrs ago
- RUSSIAN R A JIMTOWN CAUSGS gauge · California · 104 ft³/s69°F64 mi10 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.8(774)Big River Beach at Mendocino Headlands State Park
Beach in the Mendocino Headlands State Park featuring picnicking, sunbathing & more.
5.1 mi from your location
4.8(706)Navarro River Redwoods State Park
2nd-growth redwood forest stretching the length of a riverfront preserve with camping & fishing.
5.7 mi from your location
Caspar Headlands State Beach
A large number of activities are performed at this beach known for spotting migrating gray whales.
9.5 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.
