Live · updated daily from USGS
Swimmable water near you
2,141 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (1 hr ago).
- Cold · below 60°F · 385
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 934
- Warm · above 86°F · 215
- 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°F15 mi1 day ago
- NORTHEAST BRANCH ANACOSTIA RIVER AT RIVERDALE, MDUSGS gauge · Maryland · 69 ft³/s74°F27 mi1 day ago
- WATTS BRANCH AT WASHINGTON, DCUSGS gauge · 1 ft³/s73°F28 mi1 day ago
- NORTHWEST BRANCH ANACOSTIA RIVER AT BRENTWOOD, MDUSGS gauge · Maryland · 77 ft³/s74°F28 mi1 day ago
- ANACOSTIA RIVER AT KENILWORTH AT WASHINGTON, DCUSGS gauge · 768 ft³/s80°F29 mi1 day ago
- PAINT BRANCH NEAR COLLEGE PARK, MDUSGS gauge · Maryland · 13 ft³/s72°F29 mi1 day ago
- FOSTER BRANCH NEAR JOPPATOWNE, MDUSGS gauge · Maryland · 1 ft³/s70°F29 mi1 day ago
- HICKEY RUN AT NATIONAL ARBORETUM AT WASHINGTON, DCUSGS gauge · 1 ft³/s77°F29 mi1 day ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.6(1,610)Lake Waterford Park
County park with a lake, offering recreational & natural areas, plus an accessible playing field.
11 mi from your location
4.3(2,055)Rocky Point Park and Beach
On 375 acres on the Back & Middle Rivers, this park offers swimming, boating, fishing & picnicking.
18 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.

