Caswell Beach water temperature by month Swimmable from May through October.
Where these numbers come from Every number on this page is a satellite reading of the open water off Caswell Beach, not a sensor in the surf. The nearest sensor is a buoy three miles off Sunset Beach, twenty-five miles down the coast — close to its own shore, not to this one.
Set beside a buoy out in open water, this record usually lands within about a degree of it; beside a pier sensor in the shallows, a degree or two out. That gap is the surf zone — shallow water moves faster than the open ocean, warmer over sun-warmed sand on a calm afternoon and cooler after a blow. Read this as the water off the beach rather than the water at your ankles.
Month by month Month Typical Feels January 52° brisk February 53° brisk March 58° brisk April 65° refreshing May 73° perfect June 78° perfect July 84° bath-warm August 83° bath-warm September 79° perfect October 72° perfect November 65° refreshing December 57° brisk
The year at a glance swimmable 40° 50° 60° 70° 80° 90° 84° 52° J F M A M J J A S O N D January: typically 52° — brisk February: typically 53° — brisk March: typically 58° — brisk April: typically 65° — refreshing May: typically 73° — perfect June: typically 78° — perfect July: typically 84° — bath-warm August: typically 83° — bath-warm September: typically 79° — perfect October: typically 72° — perfect November: typically 65° — refreshing December: typically 57° — brisk
Typical for this month Typically about 72° in October — perfect.
from the satellite record for the water off Caswell Beach
perfect
bath-warm 80° and up perfect 72–79° refreshing 65–71° brisk below 65° 72° typical for October
About this reading The satellite record for the water off Caswell Beach covers about fifteen miles of open water off this beach. Nothing is in the water here — a satellite reads the surface of that whole stretch of ocean once a day, and the surf zone itself is too narrow to appear in it.
Warm water says nothing about surf, rip currents, or bacteria — check local lifeguard flags and advisories.