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Live · updated daily from USGS

Swimmable water near you

2,141 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (1 hr ago).

Clear location
  • Cold · below 60°F · 385
  • Cool · 60–69°F · 607
  • Comfortable · 70–86°F · 934
  • Warm · above 86°F · 215
  • 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°F11 mi1 day ago
  2. GATES BROOK NEAR WEST BOYLSTON, MAUSGS gauge · Massachusetts · 3 ft³/s
    61°F12 mi1 day ago
  3. STILLWATER RIVER NEAR STERLING, MAUSGS gauge · Massachusetts · 6 ft³/s
    67°F15 mi1 day ago
  4. QUINAPOXET RIVER AT CANADA MILLS NEAR HOLDEN, MAUSGS gauge · Massachusetts · 7 ft³/s
    70°F15 mi1 day ago
  5. STONY BROOK AT VILES STREET, NEAR WESTON, MAUSGS gauge · Massachusetts · 3 ft³/s
    66°F17 mi1 day ago
  6. STONY BROOK RES., UNNAMED TRIB 1, NEAR WESTON, MAUSGS gauge · Massachusetts · 0 ft³/s
    61°F17 mi1 day ago
  7. STONY BROOK UNNAMED TRIB 2 NR WESTON STATIONUSGS gauge · Massachusetts
    72°F17 mi1 day ago
  8. STONY BROOK RESERVOIR AT DAM NEAR WALTHAM, MAUSGS gauge · Massachusetts · 0 ft³/s
    78°F17 mi1 day ago

Nearest swimmable spots

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

Lake Cochituate4.4(80)

Lake Cochituate

Lake · Massachusetts

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

11 mi from your location

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 Chaubunagungamaug4.5(237)

Lake Chaubunagungamaug

Lake · Webster, Massachusetts

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

21 mi from your location

Brookline Reservoir Park4.7(534)

Brookline Reservoir Park

Reservoir · Brookline, Massachusetts

A walking/jogging track surrounds a reservoir anchoring this 32-acre recreation & fishing area.

23 mi from your location

Mystic Lakes4.8(41)

Mystic Lakes

Lake · Medford, Massachusetts

Lakes & adjacent state park for fishing, swimming, sailing & rowing in a scenic, natural setting.

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.