Live · updated daily from USGS
Swimmable water near you
2,137 USGS sensors are reporting a live water temperature right now, the newest reading from August 21, 2026 (11 hrs ago).
- Cold · below 60°F · 375
- Cool · 60–69°F · 595
- Comfortable · 70–86°F · 938
- Warm · above 86°F · 229
- 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.
- SALINAS R NR SANTA MARGARITA CAUSGS gauge · California · 0 ft³/s71°F18 mi12 hrs ago
- SANTA YNEZ R A NARROWS NR LOMPOC CAUSGS gauge · California · 7 ft³/s69°F61 mi11 hrs ago
- JALAMA C NR LOMPOC CAUSGS gauge · California · 0 ft³/s69°F68 mi12 hrs ago
- SANTA YNEZ R A SOLVANG CAUSGS gauge · California · 17 ft³/s69°F73 mi12 hrs ago
- SANTA YNEZ R A HWY 154 NR SANTA YNEZ CAUSGS gauge · California · 22 ft³/s65°F76 mi12 hrs ago
- SANTA YNEZ R NR SANTA YNEZ CAUSGS gauge · California62°F78 mi11 hrs ago
- HILTON CYN C 0.25 MI BL BRADBURY DAM NR SANTA YNEZUSGS gauge · California · 6 ft³/s60°F78 mi11 hrs ago
- NF KINGS R A 24TH AVE BR NR LEMOORE CAUSGS gauge · California · 0 ft³/s75°F86 mi12 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.7(2,024)Cayucos State Beach
This sandy beach with lifeguards in the summer offers swimming, surfing & night fishing on the pier.
0.9 mi from your location
4.7(412)Morro Strand State Beach
Unassuming protected beach used for picnicking, fishing, windsurfing & kite flying.
3.6 mi from your location
4.8(2,201)Morro Rock Beach
City beach featuring the iconic Morro Rock, plus sandy dunes & seasonal lifeguards.
4.9 mi from your location
Morro Bay State Park
Waterfront recreation area offering sailing, fishing, hiking, bird-watching, golfing & more.
6.7 mi from your location
4.4(838)Morro Bay State Park Campground
Cozy campsite offering coin showers & access to restrooms & eateries, in a scenic, seafront locale.
7.0 mi from your location
4.6(1,152)Atascadero Lake Park
Lakeside park with playground, paddle boats, a volleyball court & housing the Central Coast Zoo.
13 mi from your location
4.8(1,216)Moonstone Beach Park
This 30-acre park features a serene beach bordered by small, rocky bluffs & a boardwalk.
15 mi from your location
4.9(144)Moonstone Beach
Relaxed, secluded beach with rocky tide pools, a boardwalk with scenic overlooks & sunset views.
16 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.


