Can I swim here today?
Live water temperature, flow and official hazard alerts for any river, lake or beach — from USGS, NOAA and NWS sensors near it.
Find a river, creek, waterfall, lake, or beach by name or place.
We pull the latest water temperature and flow from the nearest USGS gauge or NOAA buoy, and check active NWS hazard alerts and state beach advisories for the spot.
A plain-English verdict — good to swim, use caution, cold water or avoid today — with every reason sourced and timestamped, plus a safety checklist.
Live readings come from USGS river gauges and NOAA buoys (Great Lakes and coasts); hazard alerts come from the National Weather Service and beach advisories from state programs where a feed exists. Where there’s no nearby sensor we say so and show the safety checklist. Planning a trip? See our water-safety guides.