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 (10 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.
- 62°F3.5 mi11 hrs ago
- 63°F16 mi11 hrs ago
- 78°F19 mi10 hrs ago
- 78°F19 mi11 hrs ago
- CAMBRIDGE RES., UNNAMED TRIB 2, NR LEXINGTON, MAUSGS gauge · Massachusetts · 0 ft³/s65°F22 mi11 hrs ago
- 63°F22 mi11 hrs ago
- CAMBRIDGE RES., UNNAMED TRIB 3, NR LEXINGTON, MAUSGS gauge · Massachusetts · 0 ft³/s66°F22 mi11 hrs ago
- HOBBS BRK AT TRAPELO RD AT LINCOLN, MAUSGS gauge · Massachusetts77°F23 mi10 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.5(55)The Park at River's Edge
Waterfront, landscaped green space featuring river views, lawns, paths & the Tufts crew boathouse.
16 mi from your location
4.8(41)Mystic Lakes
Lakes & adjacent state park for fishing, swimming, sailing & rowing in a scenic, natural setting.
17 mi from your location
4.2(154)Tenean Beach
Sandy spot features a playground, a boardwalk & various picnic areas with shade shelters & seating.
22 mi from your location
4.7(534)Brookline Reservoir Park
A walking/jogging track surrounds a reservoir anchoring this 32-acre recreation & fishing area.
22 mi from your location
3.6(26)Country Pond
Trees encircle this large, scenic pond in a serene environment that draws boaters & fishermen.
22 mi from your location
4.5(473)Neponset River Reservation
Wildlife habitat with parks, playgrounds & trails, plus bird-watching, fishing, hiking & kayaking.
23 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.