26.08
wed
wed
Day
84°F
NE 5 mph
Precip.
17%
17%
Night
81°F
N 2 mph
Precip.
70%
70%
27.08
thu
thu
Day
82°F
NE 6 mph
Precip.
19%
19%
Night
81°F
S 1 mph
Precip.
33%
33%
28.08
fri
fri
Day
82°F
NE 7 mph
Precip.
41%
41%
Night
81°F
W 4 mph
Precip.
66%
66%
29.08
sat
sat
Day
82°F
NE 6 mph
Precip.
24%
24%
Night
81°F
N 2 mph
Precip.
68%
68%
30.08
sun
sun
Day
84°F
NE 6 mph
Precip.
23%
23%
Night
81°F
W 2 mph
Precip.
43%
43%
31.08
mon
mon
Day
82°F
NE 6 mph
Precip.
33%
33%
Night
79°F
W 5 mph
Precip.
61%
61%
01.09
tue
tue
Day
79°F
W 10 mph
Precip.
56%
56%
Night
79°F
W 7 mph
Precip.
24%
24%
02.09
wed
wed
Day
82°F
N 6 mph
Precip.
20%
20%
Night
81°F
W 3 mph
Precip.
42%
42%
03.09
thu
thu
Day
82°F
N 7 mph
Precip.
18%
18%
Night
81°F
SE 4 mph
Precip.
25%
25%
04.09
fri
fri
Day
82°F
NE 7 mph
Precip.
20%
20%
Night
81°F
W 2 mph
Precip.
36%
36%
05.09
sat
sat
Day
84°F
NE 8 mph
Precip.
34%
34%
Night
77°F
NE 2 mph
Precip.
40%
40%
06.09
sun
sun
Day
81°F
N 6 mph
Precip.
24%
24%
Night
77°F
NW 6 mph
Precip.
81%
81%
07.09
mon
mon
Day
81°F
SE 9 mph
Precip.
23%
23%
Night
79°F
S 2 mph
Precip.
32%
32%
08.09
tue
tue
Day
82°F
NE 7 mph
Precip.
19%
19%
Night
81°F
NE 2 mph
Precip.
74%
74%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 86.8°F. The highest and lowest sea temperatures during the month were 87.8°F and 86.4°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 83.7°F. The highest and lowest sea temperatures during the month were 84.4°F and 83.3°F.
Air temperature in Jaco, °F
Precipitation total in Jaco, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Jaco
Jaco on a weather map
Places in Costa Rica:
Name
°F
24 Hours Forecast
Jaco
Local time: 21:40
August 27, thursday
0000
81°F
N
2 mph
2 mph
0300
79°F
S
4 mph
4 mph
0600
79°F
SE
4 mph
4 mph
0900
82°F
SE
4 mph
4 mph
1200
82°F
NE
6 mph
6 mph
1500
82°F
NE
7 mph
7 mph
1800
82°F
E
3 mph
3 mph
2100
82°F
E
2 mph
2 mph
