San Juan Water Temperatures

Sea water temps month by month

All Caribbean Islands

Hotel Search

Cruise Planning

Island Tours

Caribbean Recipes

Caribbean Weather


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.

To Puerto Rico Beaches

To Puerto Rico Home