19.09
sat
sat
Day
84°F
W 5 mph
Precip.
14%
14%
Night
81°F
W 8 mph
Precip.
41%
41%
20.09
sun
sun
Day
84°F
N 6 mph
Precip.
22%
22%
Night
82°F
W 6 mph
Precip.
21%
21%
21.09
mon
mon
Day
84°F
N 5 mph
Precip.
3%
3%
Night
81°F
W 6 mph
Precip.
10%
10%
22.09
tue
tue
Day
86°F
E 4 mph
Precip.
11%
11%
Night
84°F
SE 2 mph
Precip.
13%
13%
23.09
wed
wed
Day
86°F
NW 4 mph
Precip.
62%
62%
Night
81°F
NW 9 mph
Precip.
60%
60%
24.09
thu
thu
Day
86°F
SW 6 mph
Precip.
3%
3%
Night
82°F
W 12 mph
Precip.
14%
14%
25.09
fri
fri
Day
84°F
NW 4 mph
Precip.
4%
4%
Night
82°F
W 10 mph
Precip.
27%
27%
sea water
temperature
temperature
| Siesta Key |
monthly
weather
weather
| Siesta Key |
current
weather
weather
| Siesta Key |
14 days
forecast
forecast
| Siesta Key |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 87.7°F. The highest and lowest sea temperatures during the month were 88.3°F and 86.7°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 80.4°F. The highest and lowest sea temperatures during the month were 84.6°F and 77.4°F.
Air temperature in Siesta Key, °F
Precipitation total in Siesta Key, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Siesta Key
Siesta Key on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Siesta Key
Local time: 06:09
September 19, saturday
0900
77°F
W
7 mph
7 mph
1200
84°F
W
5 mph
5 mph
1500
88°F
E
4 mph
4 mph
1800
84°F
E
7 mph
7 mph
2100
84°F
E
4 mph
4 mph
September 20, sunday
0000
81°F
W
8 mph
8 mph
0300
79°F
W
7 mph
7 mph
0600
77°F
W
7 mph
7 mph
