19.09
sat
sat
Day
82°F
W 7 mph
Precip.
5%
5%
Night
84°F
W 11 mph
Precip.
37%
37%
20.09
sun
sun
Day
82°F
W 6 mph
Precip.
15%
15%
Night
84°F
SW 6 mph
Precip.
19%
19%
21.09
mon
mon
Day
84°F
N 5 mph
Precip.
4%
4%
Night
82°F
W 8 mph
Precip.
18%
18%
22.09
tue
tue
Day
86°F
NE 4 mph
Precip.
7%
7%
Night
84°F
S 3 mph
Precip.
4%
4%
23.09
wed
wed
Day
84°F
W 4 mph
Precip.
26%
26%
Night
84°F
NW 12 mph
Precip.
36%
36%
24.09
thu
thu
Day
84°F
W 6 mph
Precip.
4%
4%
Night
84°F
W 14 mph
Precip.
7%
7%
25.09
fri
fri
Day
82°F
SW 5 mph
Precip.
5%
5%
Night
84°F
W 13 mph
Precip.
40%
40%
sea water
temperature
temperature
| St. Petersburg |
monthly
weather
weather
| St. Petersburg |
current
weather
weather
| St. Petersburg |
14 days
forecast
forecast
| St. Petersburg |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 87.0°F. The highest and lowest sea temperatures during the month were 87.8°F and 85.5°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 79.4°F. The highest and lowest sea temperatures during the month were 84.6°F and 74.5°F.
Air temperature in St. Petersburg, °F
Precipitation total in St. Petersburg, in.
* Charts above show average data for the last 3 years.
Best time for vacation in St. Petersburg
St. Petersburg on a weather map
Places in USA:
Name
°F
24 Hours Forecast
St. Petersburg
Local time: 06:11
September 19, saturday
0900
79°F
W
9 mph
9 mph
1200
82°F
W
7 mph
7 mph
1500
86°F
SE
2 mph
2 mph
1800
88°F
SE
9 mph
9 mph
2100
86°F
SW
9 mph
9 mph
September 20, sunday
0000
84°F
W
11 mph
11 mph
0300
81°F
W
11 mph
11 mph
0600
81°F
W
10 mph
10 mph
