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The Water Around Us

Weekly swim report · October 20, 2026

The swim report

On October 20, 2026 the warmest USGS water reading in the United States was 90°F at BIG WARM SPGS NR DUCKWATER, NV (Nevada); 2,034 sensors reported a temperature and 270 water-related NWS hazards were active.

Warmest water right now

The 10 warmest sensor readings in today’s snapshot. Each links to its state’s report; the station name opens the official monitoring page.

  1. #1 · NevadaBIG WARM SPGS NR DUCKWATER, NVUSGS gauge · 12 ft³/s · as of 18 hrs ago90°F32°C
  2. #2 · CaliforniaHOT C A FLUME NR MAMMOTH LAKES CAUSGS gauge · 36 ft³/s · as of 19 hrs ago89°F32°C
  3. #3 · ArizonaYUMA MESA OUTLET DRAIN NEAR YUMA, AZUSGS gauge · 41 ft³/s · as of 18 hrs ago87°F31°C
  4. #4 · FloridaG -3908USGS gauge · as of 18 hrs ago86°F30°C
  5. #5 · FloridaC-8 CANAL UPSTREAM OF S-28 AT NORTH MIAMI, FLUSGS gauge · as of 1 day ago86°F30°C
  6. #6 · FloridaSW 122 AVE CANAL AT SW 202ND ST NR GOULDS, FLUSGS gauge · as of 18 hrs ago86°F30°C
  7. #7 · FloridaBLACK CREEK CANAL UPSTREAM OF S-21 AT MIAMI, FLUSGS gauge · as of 1 day ago86°F30°C
  8. #8 · FloridaBLACK CREEK CANAL WEST OF 127 AVE NR GOULDS, FLUSGS gauge · as of 18 hrs ago85°F30°C
  9. #9 · FloridaSW 122 AVE CANAL AT SW 208TH ST NR GOULDS, FLUSGS gauge · as of 19 hrs ago84°F29°C
  10. #10 · FloridaCURRY CREEK AT HIGHWAY 41 AT NOKOMIS FLUSGS gauge · as of 18 hrs ago82°F28°C

Active water hazards

270 water-related National Weather Service alerts are in effect, checked live. Alerts cover counties, forecast zones or coastal waters — an alert for an area does not mean every river or beach inside it is affected.

Stay-out warnings4Flood, surf, surge and storm warnings
Caution advisories256Watches, advisories and rip-current statements
Statements and outlooks10Hydrologic outlooks and weather statements

Most common alerts

  • Gale Warning ×106
  • Small Craft Advisory ×100
  • High Surf Advisory ×15
  • Rip Current Statement ×13
  • Coastal Flood Advisory ×12
  • Special Weather Statement ×7
  • Wind Advisory ×6
  • Beach Hazards Statement ×3

States with active alerts

Every state

Warmest current sensor reading per state, warmest first. States with no sensor reporting a temperature today sit at the end.

Find swimmable water near you →Can I swim today?Water temperature by state

About this report

Water temperatures come from USGS real-time monitoring stations (and NOAA buoys where present), captured in a daily snapshot; only readings taken within the last 48 hours are used. Hazards come live from the National Weather Service alert feed at the moment the page is built, filtered to the events that matter in or on the water. A “warmest reading” is the warmest sensor reading in a state — a point measurement at one gauge, usually on a river or stream — not a claim about its warmest lake or beach. Sensor coverage varies widely by state and USGS data is provisional.

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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.