66°F is cool water
A 3mm wetsuit keeps most swimmers comfortable.
Sea temperature drives everything from what fish are biting to how long you can safely stay in. It lags the air by weeks, so a warm day doesn’t mean warm water. Check it before you swim, dive, or head out.
Know before you go
Water temps, tides, and conditions worth knowing for your spots, plus the occasional Pathr update. No spam.
Pathr nautical charts
Explore water temperatures on the chart
Select a coastal location on Pathr’s nautical chart to check the latest available NOAA or NDBC water temperature. Readings may come from a nearby sensor when a spot has none of its own.
Frequently asked
What is the water temperature at San Nicolas Island right now?+
The latest reading near San Nicolas Island, California is about 66°F, from San Nicolas Island, CA buoy 46219. A 3mm wetsuit keeps most swimmers comfortable.
Is the water warm enough to swim at San Nicolas Island?+
At about 66°F the water is cool. A 3mm wetsuit keeps most swimmers comfortable.
Where does Pathr's water temperature data come from?+
Water temperatures come from NOAA and NDBC sensors. When a spot has no sensor of its own, we use the nearest reporting station. In the Pathr app the temperature shown tracks the station closest to your position on the chart.
