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 (16 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.
- 75°F37 mi16 hrs ago
- WATTS BRANCH AT WASHINGTON, DCUSGS gauge · 1 ft³/s73°F41 mi16 hrs ago
- Anacostia River nr Buzzard Point at Washington, DCUSGS gauge · 2,000 ft³/s83°F41 mi16 hrs ago
- ANACOSTIA RIVER AT KENILWORTH AT WASHINGTON, DCUSGS gauge · 768 ft³/s80°F41 mi16 hrs ago
- HICKEY RUN AT NATIONAL ARBORETUM AT WASHINGTON, DCUSGS gauge · 1 ft³/s77°F42 mi16 hrs ago
- NORTHEAST BRANCH ANACOSTIA RIVER AT RIVERDALE, MDUSGS gauge · Maryland · 69 ft³/s74°F43 mi16 hrs ago
- NORTHWEST BRANCH ANACOSTIA RIVER AT BRENTWOOD, MDUSGS gauge · Maryland · 77 ft³/s74°F44 mi16 hrs ago
- ACCOTINK CREEK AT KEENE MILL RD AT SPRINGFIELD, VAUSGS gauge · Virginia · 72 ft³/s77°F46 mi16 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.