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Live · updated daily from USGS

Swimmable water near you

2,135 USGS sensors are reporting a live water temperature right now, the newest reading from August 21, 2026 (14 hrs ago).

Clear location
  • Cold · below 60°F · 375
  • Cool · 60–69°F · 594
  • Comfortable · 70–86°F · 938
  • Warm · above 86°F · 228
  • 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.

  1. NASHUA RIVER, WATER STREET BRIDGE, AT CLINTON, MAUSGS gauge · Massachusetts · 45 ft³/s
    66°F7.0 mi15 hrs ago
  2. GATES BROOK NEAR WEST BOYLSTON, MAUSGS gauge · Massachusetts · 3 ft³/s
    61°F7.6 mi14 hrs ago
  3. STILLWATER RIVER NEAR STERLING, MAUSGS gauge · Massachusetts · 6 ft³/s
    67°F9.9 mi14 hrs ago
  4. QUINAPOXET RIVER AT CANADA MILLS NEAR HOLDEN, MAUSGS gauge · Massachusetts · 7 ft³/s
    70°F10 mi14 hrs ago
  5. STONY BROOK AT VILES STREET, NEAR WESTON, MAUSGS gauge · Massachusetts · 3 ft³/s
    66°F18 mi14 hrs ago
  6. STONY BROOK UNNAMED TRIB 2 NR WESTON STATIONUSGS gauge · Massachusetts
    72°F19 mi14 hrs ago
  7. STONY BROOK RES., UNNAMED TRIB 1, NEAR WESTON, MAUSGS gauge · Massachusetts · 0 ft³/s
    61°F19 mi14 hrs ago
  8. STONY BROOK AT RT 20 AT WALTHAM, MAUSGS gauge · Massachusetts · 20 ft³/s
    75°F19 mi14 hrs ago

Nearest swimmable spots

Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.

Assabet River National Wildlife Refuge4.7(610)

Assabet River National Wildlife Refuge

Wildlife refuge · Sudbury, Massachusetts

Small protected area with wetlands, forested areas & vernal pools for wildlife, plus public trails.

11 mi from your location

Lake Cochituate4.4(80)

Lake Cochituate

Lake · Massachusetts

Located within a state park, this picturesque lake features boat rentals, picnic areas & trails.

13 mi from your location

Lake Chaubunagungamaug4.5(237)

Lake Chaubunagungamaug

Lake · Webster, Massachusetts

Natural lake known for its long name offering fishing, marinas, boating & beaches for swimming.

22 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.