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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. Cohansey River at Greenwich NJUSGS gauge · New Jersey
    81°F3.2 mi14 hrs ago
  2. Delaware River at Reedy Island Jetty, DEUSGS gauge · Delaware
    82°F11 mi14 hrs ago
  3. APPOQUINIMINK RIVER NEAR ODESSA, DEUSGS gauge · Delaware
    80°F12 mi14 hrs ago
  4. C AND D CANAL NR DELAWARE CITY, DEUSGS gauge · Delaware · 14,400 ft³/s
    83°F16 mi14 hrs ago
  5. SILVER LAKE TRIBUTARY AT MIDDLETOWN, DEUSGS gauge · Delaware · 4 ft³/s
    67°F16 mi15 hrs ago
  6. ST JONES RIVER AT DOVER, DEUSGS gauge · Delaware · 50 ft³/s
    81°F17 mi14 hrs ago
  7. DELAWARE RIVER AT DEL MEM BRIDGE AT WILMINGTON DEUSGS gauge · Delaware
    81°F22 mi14 hrs ago
  8. Maurice River at Bivalve NJUSGS gauge · New Jersey
    80°F23 mi14 hrs ago

Nearest swimmable spots

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

Silver Lake Park4.4(959)

Silver Lake Park

Park · Dover, Delaware

182 acres of woodsy green space with walking trails, a playground, picnic shelters & water access.

17 mi from your location

Riverview Beach Park4.6(1,275)

Riverview Beach Park

Park · Pennsville, New Jersey

A historic waterfront park along the Delaware River in Pennsville, New Jersey, Riverview Beach Park has been a community gathering spot since the early 1900s. The park offers a sandy beach, playground, picnic areas, walking paths, and expansive river views. A seasonal splash pad and open green space make it a popular family destination, while the waterfront promenade provides scenic views of passing ships and the Delaware Memorial Bridge.

19 mi from your location

Deemers Beach3.9(91)

Deemers Beach

Beach · Delaware

Riverfront area with a simple stretch of coarse sand used as a fishing spot, plus nearby parking.

20 mi from your location

Lums Pond State Park4.7(3,435)

Lums Pond State Park

State park · Bear, Delaware
Camping nearby

1,790-acre preserve featuring freshwater pond, multipurpose trails, fishing, boat rentals & more.

21 mi from your location

Brandywine Creek4.6(28)

Brandywine Creek

River · Wilmington, Delaware

A Revolutionary War battle area, this landmark creek features historic sites & outdoor recreation.

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.