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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 (22 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. PUMPHOUSE ON ASSAWOMPSET POND NEAR LAKEVILLE, MAUSGS gauge · Massachusetts
    78°F9.3 mi23 hrs ago
  2. SIPPICAN HARBOR NR MARION GOLF CLUB AT MARION, MAUSGS gauge · Massachusetts
    78°F18 mi22 hrs ago
  3. MATTAPOISETT HBR NR NEDS POINT NR MATTAPOISETT, MAUSGS gauge · Massachusetts
    77°F22 mi22 hrs ago
  4. MT. HOPE BAY NEAR KENNEDY PARK AT FALL RIVER, MAUSGS gauge · Massachusetts
    74°F25 mi22 hrs ago
  5. FRESH POND IN GATE HOUSE AT CAMBRIDGE, MAUSGS gauge · Massachusetts
    78°F33 mi22 hrs ago
  6. FRESH POND BUOY, NEAR INTAKE AT CAMBRIDGE, MAUSGS gauge · Massachusetts
    78°F33 mi23 hrs ago
  7. STONY BROOK RESERVOIR AT DAM NEAR WALTHAM, MAUSGS gauge · Massachusetts · 0 ft³/s
    78°F34 mi22 hrs ago
  8. STONY BROOK RES., UNNAMED TRIB 1, NEAR WESTON, MAUSGS gauge · Massachusetts · 0 ft³/s
    61°F34 mi22 hrs ago

Nearest swimmable spots

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

Plymouth Long Beach4.4(1,349)

Plymouth Long Beach

Public beach · Plymouth, Massachusetts

Narrow 3-mile peninsula that offers public swimming & is a breeding ground for terns & plovers.

12 mi from your location

Minot Beach4.3(26)

Minot Beach

Beach · Scituate, Massachusetts

Modest sandy beach in a residential area featuring seasonal lifeguards & several large rocks.

20 mi from your location

Neponset River Reservation4.5(473)

Neponset River Reservation

Park · Milton, Massachusetts

Wildlife habitat with parks, playgrounds & trails, plus bird-watching, fishing, hiking & kayaking.

24 mi from your location

Tenean Beach4.2(154)

Tenean Beach

Public beach · Boston, Massachusetts
Dog-friendly

Sandy spot features a playground, a boardwalk & various picnic areas with shade shelters & seating.

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.