Current sea water temperature:
+88.0°F
| Minimum sea water temperature in August: | 91.4°F |
| Maximum sea water temperature in August: | 85.5°F |
| Average sea water temperature in August: | 87.5°F |
| more information | |
14 days
forecast
forecast
| Siesta Key |
monthly
weather
weather
| Siesta Key |
Sea water temperature for the last 10 days:
| August 29 | 88.0°F | August 24 | 88.3°F |
| August 28 | 88.2°F | August 23 | 88.3°F |
| August 27 | 88.2°F | August 22 | 87.8°F |
| August 26 | 88.0°F | August 21 | 87.8°F |
| August 25 | 87.8°F | August 20 | 88.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Siesta Key?
Based on the data about daily sea water temperature for the last three years the warmest sea in Siesta Key was noticed in August, July and September.
Monthly Sea Temperatures in Siesta Key, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 87.0°F. The highest and lowest sea temperatures during the month were 88.3°F and 85.5°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 87.6°F. The highest and lowest sea temperatures during the month were 88.9°F and 85.3°F.
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.
current
weather
weather
| Siesta Key |
weather in
September
September
| Siesta Key |
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: 19:59
August 29, saturday
2100
81°F
S
8 mph
8 mph
August 30, sunday
0000
79°F
SW
9 mph
9 mph
0300
81°F
W
6 mph
6 mph
0600
81°F
W
7 mph
7 mph
0900
82°F
W
7 mph
7 mph
1200
90°F
NW
6 mph
6 mph
1500
90°F
NE
7 mph
7 mph
1800
81°F
W
5 mph
5 mph
