Measurements:
°C
°F
CURRENT WEATHER
02:05
San Juan
78°F
W 11 mph
Feels like: 82°F
Precip: 78%
World Resorts Puerto Rico San Juan Weather

7 Day Weather Forecast

05.09
sat
DAY
88°F
W 16 mph
precip
0%
NIGHT
80°F
W 14 mph
precip
100%
05.10
sun
DAY
88°F
W 17 mph
precip
76%
NIGHT
80°F
W 12 mph
precip
80%
05.11
mon
DAY
88°F
W 16 mph
precip
78%
NIGHT
82°F
W 12 mph
precip
82%
05.12
tue
DAY
90°F
W 15 mph
precip
82%
NIGHT
80°F
NW 9 mph
precip
68%
05.13
wed
DAY
88°F
W 15 mph
precip
100%
NIGHT
80°F
NW 8 mph
precip
30%
05.14
thu
DAY
90°F
W 15 mph
precip
85%
NIGHT
80°F
NW 8 mph
precip
0%
05.15
fri
DAY
90°F
W 14 mph
precip
100%
NIGHT
80°F
NW 9 mph
precip
0%

San Juan Sea Water Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for San Juan was 27.6°F. The maximum and minimum values were 27.1°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