World Resorts USA Siesta Key Weather

Siesta Key sea water temperature

Current sea water temperature:
+82.2°F
Minimum sea water temperature in June: 87.6°F
Maximum sea water temperature in June: 81.0°F
Average sea water temperature in June: 84.8°F

Sea water temperature for the last 10 days:

June 7 82.2°F June 1 84.4°F
June 6 82.2°F May 31 84.9°F
June 5 83.3°F May 30 84.6°F
June 4 84.6°F May 29 83.5°F
June 3 84.6°F May 28 83.5°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.

Best time for vacation in Siesta Key

Sunniest months:
March 21 days
May 19 days
April 18 days
Warmest months:
July 88.1 °F
August 88.0 °F
June 86.3 °F
Warmest sea temp:
August 87.6 °F
July 87.1 °F
September 85.8 °F
Coldest months:
January 66.9 °F
February 70.7 °F
December 70.9 °F
Rainiest months:
June 5 days
July 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

Siesta Key
+90°F
E 14 mph
Feels like: +102°F
Precip.: 1%
Places in USA:
Name
°F
+77°F
+77°F
+102°F
+75°F
+86°F
+86°F
+72°F
+88°F
+84°F
+68°F
+70°F
+93°F
+95°F
+86°F
+73°F
24 Hours Forecast
Siesta Key
Local time: 16:23
June 07, sunday
1800
84°F
E
10 mph
2100
82°F
SE
3 mph
June 08, monday
0000
81°F
SW
4 mph
0300
79°F
W
10 mph
0600
77°F
NW
11 mph
0900
81°F
NW
8 mph
1200
84°F
N
5 mph
1500
86°F
E
9 mph
Units of measurement: °C / °F