Current sea water temperature:
+81.1°F
| Minimum sea water temperature in May: | 86.9°F |
| Maximum sea water temperature in May: | 76.5°F |
| Average sea water temperature in May: | 80.7°F |
| more information | |
14 days
forecast
forecast
| Siesta Key |
monthly
weather
weather
| Siesta Key |
Sea water temperature for the last 10 days:
| May 17 | 81.1°F | May 12 | 82.4°F |
| May 16 | 81.7°F | May 11 | 82.4°F |
| May 15 | 81.5°F | May 10 | 80.2°F |
| May 14 | 81.7°F | May 9 | 80.4°F |
| May 13 | 81.7°F | May 8 | 79.3°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
May
May
| 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: 00:29
May 18, monday
0300
73°F
W
13 mph
13 mph
0600
73°F
W
11 mph
11 mph
0900
79°F
W
14 mph
14 mph
1200
86°F
W
11 mph
11 mph
1500
86°F
NE
8 mph
8 mph
1800
82°F
E
11 mph
11 mph
2100
81°F
NW
6 mph
6 mph
May 19, tuesday
0000
77°F
W
11 mph
11 mph
