Measurements:
°C
°F
CURRENT WEATHER
16:41
Jaco
84°F
NW 3 mph
Feels like: 90°F
Precip: 19%
World Resorts Costa Rica Jaco Weather

7 Day Weather Forecast

09.28
mon
DAY
86°F
N 7 mph
precip
7%
NIGHT
84°F
SW 2 mph
precip
21%
09.29
tue
DAY
86°F
NE 6 mph
precip
18%
NIGHT
84°F
W 2 mph
precip
12%
09.30
wed
DAY
86°F
NE 7 mph
precip
19%
NIGHT
84°F
W 2 mph
precip
19%
10.01
thu
DAY
86°F
N 7 mph
precip
19%
NIGHT
84°F
W 2 mph
precip
22%
10.02
fri
DAY
86°F
N 9 mph
precip
42%
NIGHT
82°F
SW 4 mph
precip
29%
10.03
sat
DAY
88°F
N 9 mph
precip
21%
NIGHT
82°F
W 8 mph
precip
57%
10.04
sun
DAY
86°F
N 8 mph
precip
17%
NIGHT
78°F
SW 4 mph
precip
87%

Jaco Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Jaco was 30.2°F. The maximum and minimum values were 29.9°F and 30.7°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
December 85.5 °F
The most rainy months:
August 21 days
October 21 days
July 20 days
The most windy months:
February 5 mph
March 5 mph
April 4 mph
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