World Resorts Puerto Rico San Juan Weather

San Juan Sea Temperature in December

Average sea water temperature in December:
+82.2°F
Minimum sea water temperature in December: 84.7°F
Maximum sea water temperature in December: 80.2°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 83.0°F. The highest and lowest sea temperatures during the month were 83.7°F and 82.6°F.

Monthly sea water temperature in San Juan, °F

Which Puerto Rico resorts have warmest sea in December?

Place name December 2025 December 2024
Aguadilla 83.1°F 83.8°F
Isabella 83.0°F 83.6°F
San Juan 83.0°F 83.7°F
Mayaguez 82.9°F 83.6°F
Arecibo 82.9°F 83.4°F
Ponce 82.6°F 83.5°F

Best time for vacation in San Juan

Sunniest months:
June 10 days
March 10 days
April 9 days
Warmest months:
September 87.0 °F
August 86.9 °F
July 86.5 °F
Warmest sea temp:
October 84.9 °F
September 84.9 °F
August 84.0 °F
Coldest months:
February 80.6 °F
January 80.8 °F
March 81.3 °F
Rainiest months:
October 5 days
September 4 days
November 4 days
Windiest months:
July 12.6 mph
February 12.0 mph
June 11.8 mph

San Juan on a weather map

Current weather
18:49
San Juan
+79°F
W 12 mph
Feels like: +84°F
Precip.: 0%
Places in Puerto Rico:
Name
°F
Aguadilla
+79°F
Arecibo
+77°F
Isabella
+75°F
Mayaguez
+77°F
Ponce
+79°F
San Juan
+79°F
24 Hours Forecast
San Juan
Local time: 18:49
December 21, sunday
2100
79°F
W
11 mph
December 22, monday
0000
77°F
W
9 mph
0300
77°F
W
7 mph
0600
79°F
W
8 mph
0900
81°F
W
11 mph
1200
82°F
W
14 mph
1500
81°F
SW
14 mph
1800
79°F
SW
12 mph
Units of measurement: °C / °F