Trunk Bay water temperature

Typically about 86° in August — bath-warm.

from the Lameshur Bay station on St. John, about 4 miles away

bath-warm

bath-warm 80° and up perfect 72–79° refreshing 65–71° brisk below 65° 86° typical for August

The year at a glance

Swimmable year-round.

swimmable 70° 80° 90° 100° 87° 81° JFMAMJJASOND January: typically 81° — bath-warm February: typically 81° — bath-warm March: typically 81° — bath-warm April: typically 82° — bath-warm May: typically 84° — bath-warm June: typically 85° — bath-warm July: typically 85° — bath-warm August: typically 86° — bath-warm September: typically 87° — bath-warm October: typically 87° — bath-warm November: typically 85° — bath-warm December: typically 82° — bath-warm

Month by month

Month Typical Feels
January 81° bath-warm
February 81° bath-warm
March 81° bath-warm
April 82° bath-warm
May 84° bath-warm
June 85° bath-warm
July 85° bath-warm
August 86° bath-warm
September 87° bath-warm
October 87° bath-warm
November 85° bath-warm
December 82° bath-warm

About this reading

The Lameshur Bay station on St. John sits in the bay, which can run a few degrees off the open surf.

Reading from the Lameshur Bay station on St. John, about 4 miles away.

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