02.09
wed
wed
Day
86°F
NE 12 mph
Precip.
20%
20%
Night
79°F
W 9 mph
Precip.
54%
54%
03.09
thu
thu
Day
88°F
NE 11 mph
Precip.
23%
23%
Night
82°F
NW 2 mph
Precip.
27%
27%
04.09
fri
fri
Day
86°F
NE 6 mph
Precip.
37%
37%
Night
84°F
NE 1 mph
Precip.
40%
40%
05.09
sat
sat
Day
86°F
NE 5 mph
Precip.
16%
16%
Night
84°F
NE 9 mph
Precip.
7%
7%
06.09
sun
sun
Day
86°F
NE 12 mph
Precip.
17%
17%
Night
84°F
NE 4 mph
Precip.
5%
5%
07.09
mon
mon
Day
86°F
E 5 mph
Precip.
4%
4%
Night
84°F
NE 6 mph
Precip.
4%
4%
08.09
tue
tue
Day
88°F
N 5 mph
Precip.
13%
13%
Night
84°F
NE 7 mph
Precip.
12%
12%
09.09
wed
wed
Day
88°F
W 5 mph
Precip.
3%
3%
Night
84°F
NE 7 mph
Precip.
5%
5%
10.09
thu
thu
Day
88°F
W 6 mph
Precip.
9%
9%
Night
84°F
NE 6 mph
Precip.
6%
6%
11.09
fri
fri
Day
88°F
SE 7 mph
Precip.
3%
3%
Night
86°F
S 8 mph
Precip.
6%
6%
12.09
sat
sat
Day
90°F
SE 11 mph
Precip.
3%
3%
Night
86°F
S 5 mph
Precip.
7%
7%
13.09
sun
sun
Day
90°F
NW 4 mph
Precip.
17%
17%
Night
84°F
NW 7 mph
Precip.
9%
9%
14.09
mon
mon
Day
88°F
NW 6 mph
Precip.
5%
5%
Night
84°F
SW 9 mph
Precip.
9%
9%
15.09
tue
tue
Day
88°F
NW 5 mph
Precip.
3%
3%
Night
86°F
SE 9 mph
Precip.
6%
6%
sea water
temperature
temperature
| Siesta Key |
monthly
weather
weather
| Siesta Key |
current
weather
weather
| Siesta Key |
7 days
forecast
forecast
| Siesta Key |
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 84.9°F. The highest and lowest sea temperatures during the month were 86.7°F and 83.3°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: 12:45
September 02, wednesday
1500
84°F
E
4 mph
4 mph
1800
84°F
SW
4 mph
4 mph
2100
81°F
SW
9 mph
9 mph
September 03, thursday
0000
79°F
W
9 mph
9 mph
0300
79°F
W
9 mph
9 mph
0600
79°F
NW
7 mph
7 mph
0900
81°F
NW
6 mph
6 mph
1200
88°F
NE
11 mph
11 mph
