Measurements:
°C
°F
CURRENT WEATHER
11:08
Siesta Key
92°F
NW 6 mph
Feels like: 100°F
Precip: 12%
World Resorts USA Siesta Key Weather

7 Day Weather Forecast

09.15
tue
DAY
92°F
NW 6 mph
precip
12%
NIGHT
84°F
W 13 mph
precip
10%
09.16
wed
DAY
90°F
W 16 mph
precip
11%
NIGHT
82°F
SW 14 mph
precip
6%
09.17
thu
DAY
90°F
SW 15 mph
precip
4%
NIGHT
82°F
SW 14 mph
precip
8%
09.18
fri
DAY
90°F
SW 13 mph
precip
4%
NIGHT
82°F
W 10 mph
precip
25%
09.19
sat
DAY
88°F
NW 4 mph
precip
3%
NIGHT
82°F
NW 14 mph
precip
44%
09.20
sun
DAY
90°F
NW 6 mph
precip
5%
NIGHT
86°F
W 5 mph
precip
17%
09.21
mon
DAY
90°F
NE 7 mph
precip
4%
NIGHT
86°F
NE 2 mph
precip
11%

Siesta Key Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Siesta Key was 31.0°F. The maximum and minimum values were 30.8°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:
August 92.6 °F
July 92.6 °F
June 91.1 °F
Warmest sea temperature:
August 91.7 °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
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