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.
- NASHUA RIVER, WATER STREET BRIDGE, AT CLINTON, MAUSGS gauge · Massachusetts · 45 ft³/s66°F13 mi11 hrs ago
- STILLWATER RIVER NEAR STERLING, MAUSGS gauge · Massachusetts · 6 ft³/s67°F16 mi10 hrs ago
- GATES BROOK NEAR WEST BOYLSTON, MAUSGS gauge · Massachusetts · 3 ft³/s61°F18 mi10 hrs ago
- SOUHEGAN RIVER (SITE WLR-1) NEAR MILFORD, NHUSGS gauge · New Hampshire · 33 ft³/s69°F19 mi10 hrs ago
- 63°F19 mi10 hrs ago
- CAMBRIDGE RES., UNNAMED TRIB 2, NR LEXINGTON, MAUSGS gauge · Massachusetts · 0 ft³/s65°F19 mi10 hrs ago
- HOBBS BRK AT TRAPELO RD AT LINCOLN, MAUSGS gauge · Massachusetts77°F20 mi10 hrs ago
- QUINAPOXET RIVER AT CANADA MILLS NEAR HOLDEN, MAUSGS gauge · Massachusetts · 7 ft³/s70°F20 mi10 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.1(452)Silver Lake State Park
80-acre lakefront retreat with a large beach offering swimming, boating & picnicking.
12 mi from your location
4.7(2,266)Mine Falls Park
Vast, natural riverfront oasis featuring forest trails, sports fields & outdoor activities.
13 mi from your location
4.7(610)Assabet River National Wildlife Refuge
Small protected area with wetlands, forested areas & vernal pools for wildlife, plus public trails.
14 mi from your location
4.4(80)Lake Cochituate
Located within a state park, this picturesque lake features boat rentals, picnic areas & trails.
21 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.

