Measurements:
°C
°F
Siesta Key
64°F
NW 7 mph
Feels like: 64°F
Precip: 0%
World Resorts USA Siesta Key Weather May Weather in Siesta Key

Siesta Key Weather: May

Average Day Temperature: 88.8°F
Average Night Temperature: 76.3°F
Sea Water Temperature: 84.3°F
Number of Sunny Days: 18 days
Sunshine Hours: 13.2 - 13.7 hours
Number of Rainy Days: 2 days
Precipitation Totals: 0.9 in

Air Temperature in May, °F

Select Year: 2025 2024 2023

The highest day temperature in May 2025 was 101°F. The lowest night temperature was 63°F. The average values for day and night temperatures during May were 93.4°F и 75.7°F respectivly.

Siesta Key Water Sea Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Siesta Key was 86.1°F. The maximum and minimum values were 80.8°F and 91.0°F respectively.

Sunny, Cloudy and Gloomy days

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in May, in

Precipitation total in May for Siesta Key is 0.9 in.

Wind Speed in May, mph

The average wind speed in May is 9.0 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Siesta Key in May is 9.6 hours.

Best Time to Visit Siesta Key
The most sunny months:
March 20 days
May 18 days
April 17 days
The most warm months:
July 92.3 °F
August 92.2 °F
June 90.4 °F
Warmest sea temperature:
August 91.8 °F
July 91.2 °F
September 89.8 °F
The most cold months:
January 68.5 °F
December 72.3 °F
February 73.4 °F
The most rainy months:
June 5 days
July 4 days
September 3 days
The most windy months:
November 10 mph
January 10 mph
October 10 mph

Siesta Key on the Weather Map

USA Resorts:
NAME
Chicago -2
Hawaii +78
Honolulu +78
Houston +44
Las Vegas +38
Los Angeles +50
Maui +70
Miami +68
Miami Beach +80
New York +16
San Diego +52
San Francisco +46
Sarasota +64
Tampa +62
Washington +26
24 Hours Weather Forecast
Siesta Key
Local time: 04:52
05 dec, friday
0600 64°F
NW
7 mph
0900 68°F
N
7 mph
1200 72°F
N
12 mph
1500 74°F
N
11 mph
1800 74°F
N
7 mph
2100 74°F
N
7 mph
06 dec, saturday
0000 74°F
NE
6 mph
0300 72°F
N
6 mph