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 (8 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.
- 63°F12 mi8 hrs ago
- CAMBRIDGE RES., UNNAMED TRIB 2, NR LEXINGTON, MAUSGS gauge · Massachusetts · 0 ft³/s65°F13 mi8 hrs ago
- NASHUA RIVER, WATER STREET BRIDGE, AT CLINTON, MAUSGS gauge · Massachusetts · 45 ft³/s66°F13 mi9 hrs ago
- HOBBS BRK AT TRAPELO RD AT LINCOLN, MAUSGS gauge · Massachusetts77°F13 mi8 hrs ago
- CAMBRIDGE RES., UNNAMED TRIB 3, NR LEXINGTON, MAUSGS gauge · Massachusetts · 0 ft³/s66°F13 mi8 hrs ago
- HOBBS BK BELOW CAMBRIDGE RES NR KENDALL GREEN, MAUSGS gauge · Massachusetts · 18 ft³/s78°F14 mi8 hrs ago
- STONY BROOK AT VILES STREET, NEAR WESTON, MAUSGS gauge · Massachusetts · 3 ft³/s66°F14 mi8 hrs ago
- 72°F15 mi8 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(610)Assabet River National Wildlife Refuge
Small protected area with wetlands, forested areas & vernal pools for wildlife, plus public trails.
8.4 mi from your location
4.4(80)Lake Cochituate
Located within a state park, this picturesque lake features boat rentals, picnic areas & trails.
15 mi from your location
4.7(2,266)Mine Falls Park
Vast, natural riverfront oasis featuring forest trails, sports fields & outdoor activities.
16 mi from your location
4.1(452)Silver Lake State Park
80-acre lakefront retreat with a large beach offering swimming, boating & picnicking.
17 mi from your location
4.8(41)Mystic Lakes
Lakes & adjacent state park for fishing, swimming, sailing & rowing in a scenic, natural setting.
18 mi from your location
4.7(121)Canobie Lake
Calm reservoir with an amusement park along its shores, also popular for kayaking & fishing.
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.

