Measurements:
°C
°F
CURRENT WEATHER
17:40
Siesta Key
94°F
E 10 mph
Feels like: 106°F
Precip: 4%
World Resorts USA Siesta Key Weather

7 Day Weather Forecast

08.25
tue
DAY
94°F
NE 8 mph
precip
14%
NIGHT
82°F
NE 3 mph
precip
14%
08.26
wed
DAY
92°F
N 4 mph
precip
13%
NIGHT
80°F
NW 6 mph
precip
54%
08.27
thu
DAY
92°F
N 6 mph
precip
13%
NIGHT
82°F
W 7 mph
precip
10%
08.28
fri
DAY
92°F
NW 6 mph
precip
7%
NIGHT
82°F
SW 9 mph
precip
18%
08.29
sat
DAY
92°F
NW 6 mph
precip
3%
NIGHT
86°F
W 6 mph
precip
22%
08.30
sun
DAY
92°F
NW 7 mph
precip
15%
NIGHT
84°F
W 9 mph
precip
21%
08.31
mon
DAY
92°F
NW 6 mph
precip
7%
NIGHT
88°F
W 6 mph
precip
13%

Siesta Key Sea Water Temperature in August, °F

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Siesta Key was 30.5°F. The maximum and minimum values were 29.7°F and 31.3°F respectively.

Siesta Key on the Weather Map

Best Time to Visit Siesta Key
The most sunny months:
March 21 days
May 19 days
April 18 days
The most warm months:
July 92.6 °F
August 92.2 °F
June 91.1 °F
Warmest sea temperature:
August 91.6 °F
July 91.3 °F
September 89.8 °F
The most cold months:
January 68.8 °F
February 73.0 °F
December 73.2 °F
The most rainy months:
July 4 days
June 4 days
September 3 days
The most windy months:
November 10 mph
January 10 mph
October 10 mph
more details