World Resorts USA Siesta Key Weather

Siesta Key 14 Days Forecast

23.09
wed
Day
84°F
NE 2 mph
Precip.
38%
Night
79°F
W 8 mph
Precip.
10%
24.09
thu
Day
84°F
S 11 mph
Precip.
13%
Night
77°F
SW 16 mph
Precip.
10%
25.09
fri
Day
82°F
SW 11 mph
Precip.
4%
Night
77°F
SW 12 mph
Precip.
24%
26.09
sat
Day
81°F
SW 7 mph
Precip.
2%
Night
79°F
SW 6 mph
Precip.
2%
27.09
sun
Day
81°F
NE 2 mph
Precip.
4%
Night
79°F
E 6 mph
Precip.
13%
28.09
mon
Day
82°F
N 6 mph
Precip.
14%
Night
81°F
N 6 mph
Precip.
14%
29.09
tue
Day
82°F
N 9 mph
Precip.
23%
Night
81°F
NW 5 mph
Precip.
17%
30.09
wed
Day
84°F
NW 9 mph
Precip.
13%
Night
81°F
NW 6 mph
Precip.
14%
01.10
thu
Day
84°F
NW 13 mph
Precip.
15%
Night
81°F
NW 9 mph
Precip.
22%
02.10
fri
Day
75°F
NW 13 mph
Precip.
81%
Night
75°F
W 23 mph
Precip.
89%
03.10
sat
Day
82°F
NE 25 mph
Precip.
75%
Night
77°F
S 10 mph
Precip.
24%
04.10
sun
Day
82°F
NW 7 mph
Precip.
4%
Night
81°F
S 7 mph
Precip.
13%
05.10
mon
Day
79°F
NW 6 mph
Precip.
59%
Night
77°F
NE 5 mph
Precip.
76%

Sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 87.5°F. The highest and lowest sea temperatures during the month were 88.3°F and 86.0°F.

Sea water temperature in October, °F

Show year:
2025
2024
2023

The average sea water temperature in October of 2025 was 80.4°F. The highest and lowest sea temperatures during the month were 84.6°F and 77.4°F.

Air temperature in Siesta Key, °F

Precipitation total in Siesta Key, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Siesta Key

Sunniest months:
March 21 days
May 19 days
April 18 days
Warmest months:
August 88.3 °F
July 88.3 °F
June 87.0 °F
Warmest sea temp:
August 87.5 °F
July 87.1 °F
September 86.0 °F
Coldest months:
January 66.9 °F
February 70.7 °F
December 70.9 °F
Rainiest months:
July 4 days
June 4 days
September 3 days
Windiest months:
November 10.5 mph
January 10.4 mph
October 10.4 mph

Siesta Key on a weather map

Current weather
01:20
Siesta Key
+81°F
W 6 mph
Feels like: +86°F
Precip.: 11%
Places in USA:
Name
°F
Boston
+57°F
Washington
+59°F
Hawaii
+79°F
Las Vegas
+84°F
Los Angeles
+72°F
Miami
+82°F
Maui
+66°F
New York
+61°F
Panama City Beach
+77°F
San Diego
+70°F
San Francisco
+59°F
Santa Monica
+70°F
Sarasota
+79°F
Houston
+84°F
Chicago
+59°F
all places
24 Hours Forecast
Siesta Key
Local time: 01:20
September 23, wednesday
0300
79°F
W
7 mph
0600
79°F
NW
6 mph
0900
81°F
NW
7 mph
1200
84°F
NE
2 mph
1500
84°F
E
9 mph
1800
86°F
S
5 mph
2100
82°F
W
9 mph
September 24, thursday
0000
79°F
W
8 mph
Units of measurement: °C / °F