Live · updated daily from USGS
Swimmable water near you
2,135 USGS sensors are reporting a live water temperature right now, the newest reading from August 21, 2026 (21 hrs ago).
- Cold · below 60°F · 375
- Cool · 60–69°F · 594
- Comfortable · 70–86°F · 938
- Warm · above 86°F · 228
- 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.
- GULKANA R AT SOURDOUGH AKUSGS gauge · Alaska · 946 ft³/s56°F81 mi22 hrs ago
- SALCHA R NR SALCHAKET AKUSGS gauge · Alaska · 1,830 ft³/s55°F112 mi22 hrs ago
- CHENA R NR TWO RIVERS AKUSGS gauge · Alaska · 959 ft³/s49°F121 mi22 hrs ago
- NATIONAL C NR MCCARTHY AKUSGS gauge · Alaska · 6 ft³/s41°F142 mi22 hrs ago
- BIRCH C NR CIRCLE AKUSGS gauge · Alaska · 1,650 ft³/s55°F155 mi22 hrs ago
- TANANA R AT NENANA AKUSGS gauge · Alaska · 56,700 ft³/s56°F171 mi22 hrs ago
- TOLOVANA R BL ROSEBUD C NR LIVENGOOD AKUSGS gauge · Alaska · 242 ft³/s49°F194 mi22 hrs ago
- COPPER R AT MILLION DOLLAR BRIDGE NR CORDOVA AKUSGS gauge · Alaska · 184,000 ft³/s46°F195 mi22 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
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.