Current sea water temperature:
+72.0°F
| Minimum sea water temperature in March: | 78.3°F |
| Maximum sea water temperature in March: | 63.9°F |
| Average sea water temperature in March: | 71.1°F |
| more information | |
14 days
forecast
forecast
| Siesta Key |
monthly
weather
weather
| Siesta Key |
Sea water temperature for the last 10 days:
| March 18 | 72.0°F | March 13 | 73.8°F |
| March 17 | 73.4°F | March 12 | 73.8°F |
| March 16 | 73.6°F | March 11 | 72.9°F |
| March 15 | 73.0°F | March 10 | 72.1°F |
| March 14 | 72.9°F | March 9 | 70.5°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 88.6°F. The highest and lowest sea temperatures during the month were 90.1°F and 86.7°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 86.9°F. The highest and lowest sea temperatures during the month were 89.1°F and 85.6°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
March
March
| 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: 06:35
March 18, wednesday
0900
50°F
SW
14 mph
14 mph
1200
64°F
SW
11 mph
11 mph
1500
73°F
S
7 mph
7 mph
1800
70°F
S
12 mph
12 mph
2100
64°F
SW
13 mph
13 mph
March 19, thursday
0000
59°F
SW
15 mph
15 mph
0300
57°F
SW
13 mph
13 mph
0600
54°F
SW
14 mph
14 mph
