Luquillo Beach water temperature by month

Swimmable year-round.

Month by month

Month Typical Feels
January 81° bath-warm
February 80° bath-warm
March 81° bath-warm
April 81° bath-warm
May 83° bath-warm
June 84° bath-warm
July 84° bath-warm
August 85° bath-warm
September 86° bath-warm
October 86° bath-warm
November 85° bath-warm
December 83° bath-warm

The year at a glance

swimmable 70° 80° 90° 100° 86° 80° JFMAMJJASOND January: typically 81° — bath-warm February: typically 80° — bath-warm March: typically 81° — bath-warm April: typically 81° — bath-warm May: typically 83° — bath-warm June: typically 84° — bath-warm July: typically 84° — bath-warm August: typically 85° — bath-warm September: typically 86° — bath-warm October: typically 86° — bath-warm November: typically 85° — bath-warm December: typically 83° — bath-warm

The water right now

Typically about 86° in October — bath-warm.

from the buoy off San Juan, about 26 miles down the coast, just offshore

bath-warm

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

Seaweed season

On the Caribbean, sargassum season runs from April through August, heaviest from June through July.

The bulletins cover the Caribbean Sea as a whole rather than island by island, and put the basin's heaviest months in summer — so read this as the region's shape, not this beach's.

  1. January: rare
  2. February: rare
  3. March: rare
  4. April: some seaweed
  5. May: some seaweed
  6. June: peak season
  7. July: peak season
  8. August: some seaweed
  9. September: rare
  10. October: rare
  11. November: rare
  12. December: rare

This is a pattern, not a forecast. The lab that watches this says plainly that predicting seaweed on an individual beach is difficult or impossible — whether it comes ashore depends on winds, tides and currents nobody can call ahead. The bulletins track how much is out there and look about a month on.

From the Sargassum Watch System, the Optical Oceanography Lab at the USF College of Marine Science. Read the current bulletin for this month's outlook.

About this reading

The reading comes from the buoy off San Juan just off the coast about 26 miles from here — treat it as the area's water, not this exact sandbar.

Reading from the buoy off San Juan, about 26 miles down the coast, just offshore.

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