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Best time to visit Siesta Key, FL, USA

Our verdict

The best time to visit Siesta Key is March-May

Siesta Key is a place lots of people visit almost all year round, but if you’re looking for the best time to go, March-May is definitely the time you should visit. This is based on a number of factors such as the weather, cost of flights and accommodation, peak travel periods and more.

The very hottest temperatures in Siesta Key get to around 32℃ (90℉) in the height of summer. The coldest it usually gets in winter-time in Siesta Key is around 10℃ (50℉).

The sun stays up the longest in Siesta Key in July, so you’ll get the most out of your daytime activities if you visit around this time. August sees the most amount of rain in a month if you’re ok with chancing getting drenched, so if you’re looking to stay dry, visit in February instead.

Keep reading to find out more detailed information about the seasons and climate in Siesta Key, as well as our favourite tools to help you find the best options for transport, accommodation, and much more.

Warmest month

August

Least rainfall

February

Most daylight

July

Siesta Key seasons

Before you continue, it’s important to know when the seasons are in Siesta Key as they might be different to yours depending on where in the world you’re travelling from. Siesta Key is in the Northern Hemisphere, so the seasons fall during these months:

SeasonMonths
Summer June to August
Autumn/fall September to November
Winter December to February
Spring March to May

Average temperatures in Siesta Key

If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Siesta Key for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.

Siesta Key climate by month

If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Siesta Key for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.

Jump to:

JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC

Siesta Key in January

  • Average temperature: 17℃ (62℉)
  • Average high temperature: 20℃ (68℉)
  • Average low temperature: 13℃ (56℉)
  • Average humidity: 73%
  • Average sunny days: 21 days
  • Average rainfall: 31mm (1") over 8 days
21 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Siesta Key in January, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.


Siesta Key in February

  • Average temperature: 18℃ (65℉)
  • Average high temperature: 22℃ (71℉)
  • Average low temperature: 15℃ (59℉)
  • Average humidity: 75%
  • Average sunny days: 18 days
  • Average rainfall: 27mm (1") over 8 days
18 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Siesta Key in February, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.


Siesta Key in March

  • Average temperature: 20℃ (68℉)
  • Average high temperature: 24℃ (74℉)
  • Average low temperature: 16℃ (62℉)
  • Average humidity: 72%
  • Average sunny days: 20 days
  • Average rainfall: 32mm (1") over 9 days
20 days
of pure sunshine
9 days
of showers or rain

What to pack: If you’re heading to Siesta Key in March, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Siesta Key in April

  • Average temperature: 23℃ (74℉)
  • Average high temperature: 27℃ (80℉)
  • Average low temperature: 20℃ (68℉)
  • Average humidity: 72%
  • Average sunny days: 16 days
  • Average rainfall: 34mm (1") over 12 days
16 days
of pure sunshine
12 days
of showers or rain

What to pack: If you’re heading to Siesta Key in April, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Siesta Key in May

  • Average temperature: 26℃ (78℉)
  • Average high temperature: 29℃ (84℉)
  • Average low temperature: 23℃ (73℉)
  • Average humidity: 71%
  • Average sunny days: 14 days
  • Average rainfall: 65mm (3") over 15 days
14 days
of pure sunshine
15 days
of showers or rain

What to pack: If you’re heading to Siesta Key in May, make sure you pack t-shirts and light clothing.


Siesta Key in June

  • Average temperature: 28℃ (82℉)
  • Average high temperature: 31℃ (87℉)
  • Average low temperature: 25℃ (78℉)
  • Average humidity: 75%
  • Average sunny days: 6 days
  • Average rainfall: 134mm (5") over 22 days
6 days
of pure sunshine
22 days
of showers or rain

What to pack: If you’re heading to Siesta Key in June, make sure you pack t-shirts and shorts.. It stays warm all day and night.


Siesta Key in July

  • Average temperature: 28℃ (83℉)
  • Average high temperature: 31℃ (88℉)
  • Average low temperature: 26℃ (79℉)
  • Average humidity: 75%
  • Average sunny days: 3 days
  • Average rainfall: 140mm (6") over 26 days
3 days
of pure sunshine
26 days
of showers or rain

What to pack: If you’re heading to Siesta Key in July, make sure you pack t-shirts and shorts.. It stays warm all day and night.


Siesta Key in August

  • Average temperature: 29℃ (84℉)
  • Average high temperature: 32℃ (89℉)
  • Average low temperature: 26℃ (79℉)
  • Average humidity: 74%
  • Average sunny days: 3 days
  • Average rainfall: 152mm (6") over 27 days
3 days
of pure sunshine
27 days
of showers or rain

What to pack: If you’re heading to Siesta Key in August, make sure you pack t-shirts and shorts.. It stays warm all day and night.


Siesta Key in September

  • Average temperature: 28℃ (82℉)
  • Average high temperature: 31℃ (87℉)
  • Average low temperature: 25℃ (77℉)
  • Average humidity: 75%
  • Average sunny days: 5 days
  • Average rainfall: 117mm (5") over 23 days
5 days
of pure sunshine
23 days
of showers or rain

What to pack: If you’re heading to Siesta Key in September, make sure you pack t-shirts and shorts.. It stays warm all day and night.

Siesta Key in October

  • Average temperature: 25℃ (77℉)
  • Average high temperature: 28℃ (83℉)
  • Average low temperature: 22℃ (72℉)
  • Average humidity: 73%
  • Average sunny days: 15 days
  • Average rainfall: 49mm (2") over 14 days
15 days
of pure sunshine
14 days
of showers or rain

What to pack: If you’re heading to Siesta Key in October, make sure you pack t-shirts and light clothing.


Siesta Key in November

  • Average temperature: 21℃ (70℉)
  • Average high temperature: 25℃ (76℉)
  • Average low temperature: 18℃ (64℉)
  • Average humidity: 73%
  • Average sunny days: 20 days
  • Average rainfall: 27mm (1") over 8 days
20 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Siesta Key in November, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Siesta Key in December

  • Average temperature: 19℃ (67℉)
  • Average high temperature: 22℃ (72℉)
  • Average low temperature: 16℃ (61℉)
  • Average humidity: 76%
  • Average sunny days: 19 days
  • Average rainfall: 50mm (2") over 9 days
19 days
of pure sunshine
9 days
of showers or rain

What to pack: If you’re heading to Siesta Key in December, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.


Top FAQs

The hottest month of the year in Siesta Key is usually August, where temperatures tend to rise to around 32℃ (89℉) in the middle of the day or early afternoon.
The month with the least amount of rain in Siesta Key is generally around February. The dry season often coincides with cooler weather, so you should check the temperatures in February first to make sure it’s still a good time to go.
The rainiest time of year in Siesta Key is generally around August, although the wetter season can sometimes extend a few months either side of August too.
If you want to get the most out of your time visiting Siesta Key, or if you're just afraid of the dark, the days in July are usually the longest between sunrise and sunset.

Siesta Key map