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.
- Anacostia River nr Buzzard Point at Washington, DCUSGS gauge · 2,000 ft³/s83°F20 mi9 hrs ago
- ACCOTINK CREEK AT KEENE MILL RD AT SPRINGFIELD, VAUSGS gauge · Virginia · 72 ft³/s77°F21 mi9 hrs ago
- WATTS BRANCH AT WASHINGTON, DCUSGS gauge · 1 ft³/s73°F22 mi9 hrs ago
- ANACOSTIA RIVER AT KENILWORTH AT WASHINGTON, DCUSGS gauge · 768 ft³/s80°F22 mi9 hrs ago
- HICKEY RUN AT NATIONAL ARBORETUM AT WASHINGTON, DCUSGS gauge · 1 ft³/s77°F23 mi9 hrs ago
- ACCOTINK CREEK NEAR ANNANDALE, VAUSGS gauge · Virginia · 24 ft³/s75°F23 mi9 hrs ago
- LONG BRANCH NEAR ANNANDALE, VAUSGS gauge · Virginia · 2 ft³/s73°F24 mi10 hrs ago
- NORTHWEST BRANCH ANACOSTIA RIVER AT BRENTWOOD, MDUSGS gauge · Maryland · 77 ft³/s74°F25 mi9 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.7(2,458)National Harbor
Development along the Potomac River featuring a large Ferris wheel, restaurants, shopping & events.
15 mi from your location
4.7(324)Patuxent River Park - Jug Bay Natural Area
This 7,000-acre park offers a variety of trails & water activities, plus a rural-history museum.
16 mi from your location
Burke Lake
Wooded park around a dam with boat rentals & fishing spots, plus hiking on a lakeside loop trail.
25 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.

