Measurements:
°C
°F
CURRENT WEATHER
14:05
San Juan
90°F
W 16 mph
Feels like: 96°F
Precip: 75%
World Resorts Puerto Rico San Juan Weather

7 Day Weather Forecast

05.29
fri
DAY
90°F
W 16 mph
precip
89%
NIGHT
80°F
NW 9 mph
precip
0%
05.30
sat
DAY
90°F
W 14 mph
precip
0%
NIGHT
80°F
NW 8 mph
precip
69%
05.31
sun
DAY
92°F
W 14 mph
precip
0%
NIGHT
82°F
NW 7 mph
precip
0%
06.01
mon
DAY
90°F
W 13 mph
precip
0%
NIGHT
80°F
NW 6 mph
precip
0%
06.02
tue
DAY
90°F
NW 16 mph
precip
0%
NIGHT
80°F
NW 10 mph
precip
70%
06.03
wed
DAY
88°F
W 16 mph
precip
25%
NIGHT
80°F
NW 8 mph
precip
80%
06.04
thu
DAY
88°F
W 15 mph
precip
52%
NIGHT
80°F
NW 10 mph
precip
100%

San Juan Sea Water Temperature in May, °F

Select Year: 2026 2025 2024

The average sea surface temperature in May 2026 for San Juan was 27.8°F. The maximum and minimum values were 27.5°F and 28.1°F respectively.

San Juan on the Weather Map

Best Time to Visit San Juan
The most sunny months:
June 10 days
March 9 days
October 9 days
The most warm months:
September 91.1 °F
August 91.0 °F
July 90.6 °F
Warmest sea temperature:
October 88.8 °F
September 88.8 °F
August 87.8 °F
The most cold months:
February 84.0 °F
January 84.2 °F
March 84.7 °F
The most rainy months:
October 5 days
September 4 days
November 4 days
The most windy months:
July 12 mph
February 12 mph
June 12 mph
more details