Cumberland Island water temperature

Typically about 85° in August — bath-warm.

from an offshore buoy off Fernandina Beach, about 10 miles away

bath-warm

bath-warm 80° and up perfect 72–79° refreshing 65–71° brisk below 65° 85° typical for August

The year at a glance

Swimmable from April through November.

swimmable 50° 60° 70° 80° 90° 85° 57° JFMAMJJASOND January: typically 57° — brisk February: typically 59° — brisk March: typically 64° — brisk April: typically 70° — refreshing May: typically 77° — perfect June: typically 80° — bath-warm July: typically 83° — bath-warm August: typically 85° — bath-warm September: typically 82° — bath-warm October: typically 76° — perfect November: typically 71° — refreshing December: typically 62° — brisk

Month by month

Month Typical Feels
January 57° brisk
February 59° brisk
March 64° brisk
April 70° refreshing
May 77° perfect
June 80° bath-warm
July 83° bath-warm
August 85° bath-warm
September 82° bath-warm
October 76° perfect
November 71° refreshing
December 62° brisk

About this reading

The reading comes from an offshore buoy off Fernandina Beach riding about 10 miles out; the surf zone usually reads close to it, though sun-warmed shallows can run warmer on calm afternoons.

Reading from an offshore buoy off Fernandina Beach, about 10 miles away.

Warm water says nothing about surf, rip currents, or bacteria — check local lifeguard flags and advisories.