Can you swim in United States in January?

Yes, but expect a cool dip

Average sea

18°C

Feels

mild

Month

January

The short answer

The sea around United States averages 18°C in January. It is swimmable but bracing. Confident swimmers and acclimatised locals will be fine; visitors used to bath-warm summer seas may prefer short dips.

Live conditions matter most

Monthly averages set expectations, but a specific beach today depends on wind, waves and local currents. Use the live map or any beach page to see right-now temperatures.

Top swimming beaches in United States