San Juan Water Temperatures

Sea water temps month by month

San Juan Water Temperature
Month By Month

The San Juan sea water temperature may be thought as cooler than it is. It rarely goes below 80F except in January to March, when it can drop to a low of 79, higher than in Florida or the Bahamas at that time.

That means most of the year San Juan water temperature is perfect for swimming or snorkeling. At the end of summer, the water temperature goes to a warm 84F.

Jan 79F 26C	Feb 79F 26C	Mar 79F 26C
April 80F 27C	May 81F 27C	June 83F 28C
July 83F 28C	Aug 84F 29C	Sept 84F 29C
Oct 83F 29C	Nov 83F 28C	Dec 81F 27C

Compare San Juan water temperatures with other popular destinations to put them in perspective:

Florida Springs (where divers wear wet suits year-round): A constant 72 or 74 F.

South Florida water temperatures are 71 in winter, bloom to 86F in mid and late summer

Nassau Bahamas go as low as 72F in winter but increase to the 80s in summer.

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