Measurements:
°C
°F
CURRENT WEATHER
03:47
Jaco
82°F
W 5 mph
Feels like: 86°F
Precip: 76%
World Resorts Costa Rica Jaco Weather

7 Day Weather Forecast

09.07
mon
DAY
86°F
N 4 mph
precip
20%
NIGHT
82°F
SE 5 mph
precip
29%
09.08
tue
DAY
86°F
N 7 mph
precip
18%
NIGHT
84°F
NE 1 mph
precip
62%
09.09
wed
DAY
88°F
NE 9 mph
precip
20%
NIGHT
84°F
SE 2 mph
precip
17%
09.10
thu
DAY
86°F
NE 8 mph
precip
10%
NIGHT
84°F
SW 4 mph
precip
33%
09.11
fri
DAY
86°F
N 7 mph
precip
19%
NIGHT
84°F
W 6 mph
precip
50%
09.12
sat
DAY
88°F
N 8 mph
precip
17%
NIGHT
80°F
W 8 mph
precip
50%
09.13
sun
DAY
86°F
N 7 mph
precip
10%
NIGHT
80°F
W 9 mph
precip
75%

Jaco Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Jaco was 28.7°F. The maximum and minimum values were 28.5°F and 29.1°F respectively.

Jaco on the Weather Map

Best Time to Visit Jaco
The most sunny months:
March 12 days
February 11 days
January 8 days
The most warm months:
April 89.0 °F
March 88.9 °F
February 88.4 °F
Warmest sea temperature:
April 89.7 °F
May 89.4 °F
March 89.3 °F
The most cold months:
November 83.9 °F
October 84.7 °F
September 85.5 °F
The most rainy months:
August 21 days
September 21 days
October 21 days
The most windy months:
February 5 mph
March 5 mph
April 4 mph
more details