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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 22, 2026 (9 hrs ago).

Clear location
  • Cold · below 60°F · 384
  • Cool · 60–69°F · 607
  • Comfortable · 70–86°F · 929
  • 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. BUCKS BRANCH DS OF CONRAIL RD AT CANNON, DEUSGS gauge · Delaware
    71°F12 mi1 day ago
  2. MILLSBORO POND OUTLET AT MILLSBORO, DEUSGS gauge · Delaware · 52 ft³/s
    82°F12 mi1 day ago
  3. BROADKILL RIVER NEAR MILTON, DEUSGS gauge · Delaware
    82°F22 mi1 day ago
  4. MASSEY DITCH AT MASSEY LANDING, DEUSGS gauge · Delaware
    78°F23 mi1 day ago
  5. BEAVERDAM BRANCH AT HOUSTON, DEUSGS gauge · Delaware · 13 ft³/s
    71°F25 mi1 day ago
  6. MURDERKILL RIVER AT FREDERICA, DEUSGS gauge · Delaware
    81°F33 mi1 day ago
  7. CHOPTANK RIVER NEAR GREENSBORO, MDUSGS gauge · Maryland · 46 ft³/s
    76°F35 mi1 day ago
  8. ST JONES RIVER AT DOVER, DEUSGS gauge · Delaware · 50 ft³/s
    81°F43 mi1 day ago

Nearest swimmable spots

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

Trap Pond State Park4.7(1,519)

Trap Pond State Park

State park · Laurel, Delaware
Camping nearby

Wetland forest with cypress trees features a nature center, trails & a pond for boating & fishing.

1.9 mi from your location

Delaware Seashore State Park4.6(1,082)

Delaware Seashore State Park

State park · Rehoboth Beach, Delaware
Camping nearby

Built in 1876, this restored, historic home offers period artifacts, history exhibits & a gift shop.

24 mi from your location

Bethany Beach Boardwalk4.7(3,218)

Bethany Beach Boardwalk

Tourist attraction · Bethany Beach, Delaware

This wooden boardwalk lined with charming clapboard houses goes past a plaza with a bandstand.

25 mi from your location

Bethany Beach4.7(98)

Bethany Beach

Beach · Delaware

Relaxed, sandy town beach featuring a wooden boardwalk lined with shops & eateries.

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.