COVID-19 (Coronavirus) may impact your travel plans and the data on our site. Stay safe, and always check official travel advice before you book.

Best time to visit Sanibel Island, FL, USA

Our verdict

The best time to visit Sanibel Island is February-April

Want to know when to travel to Sanibel Island? Based on criteria such as the weather, cost of flights and hotels, and peak travel periods, February-April is the best time to go to Sanibel Island. Don’t just take our word for it though… We’ve put together loads of information below to help you decide, such as a monthly breakdown of the weather, what to pack, when to fly, and much more.

During the warmer months, temperatures in Sanibel Island can rise to a maximum of 32℃ (89℉). In the winter months, it can get down to as low as 12℃ (54℉) at night.

The days are longest in Sanibel Island in July, so if you want to see the sights during the day when the sun is up for the longest time, it’s best to visit around that time of year. The wet season in Sanibel Island falls around August, so if you prefer the dryer weather, you should look to visit in February instead.

Keep reading to find out more detailed information about the seasons and climate in Sanibel Island, 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

Sanibel Island seasons

Before you continue, it’s important to know when the seasons are in Sanibel Island as they might be different to yours depending on where in the world you’re travelling from. Sanibel Island 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 Sanibel Island

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 Sanibel Island 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.

Sanibel Island 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 Sanibel Island 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

Sanibel Island in January

  • Average temperature: 18℃ (65℉)
  • Average high temperature: 21℃ (70℉)
  • Average low temperature: 15℃ (59℉)
  • Average humidity: 74%
  • Average sunny days: 20 days
  • Average rainfall: 37mm (1") over 9 days
20 days
of pure sunshine
9 days
of showers or rain

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


Sanibel Island in February

  • Average temperature: 19℃ (67℉)
  • Average high temperature: 22℃ (72℉)
  • Average low temperature: 17℃ (62℉)
  • Average humidity: 76%
  • 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 Sanibel Island in February, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.


Sanibel Island in March

  • Average temperature: 21℃ (69℉)
  • Average high temperature: 24℃ (74℉)
  • Average low temperature: 18℃ (64℉)
  • Average humidity: 72%
  • Average sunny days: 19 days
  • Average rainfall: 32mm (1") over 10 days
19 days
of pure sunshine
10 days
of showers or rain

What to pack: If you’re heading to Sanibel Island 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.


Sanibel Island in April

  • Average temperature: 24℃ (75℉)
  • Average high temperature: 26℃ (79℉)
  • Average low temperature: 21℃ (70℉)
  • Average humidity: 74%
  • Average sunny days: 16 days
  • Average rainfall: 37mm (1") over 12 days
16 days
of pure sunshine
12 days
of showers or rain

What to pack: If you’re heading to Sanibel Island in April, make sure you pack t-shirts and light clothing.


Sanibel Island in May

  • Average temperature: 26℃ (79℉)
  • Average high temperature: 28℃ (83℉)
  • Average low temperature: 24℃ (74℉)
  • Average humidity: 73%
  • Average sunny days: 12 days
  • Average rainfall: 87mm (3") over 17 days
12 days
of pure sunshine
17 days
of showers or rain

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


Sanibel Island in June

  • Average temperature: 28℃ (82℉)
  • Average high temperature: 30℃ (86℉)
  • Average low temperature: 26℃ (79℉)
  • Average humidity: 75%
  • Average sunny days: 5 days
  • Average rainfall: 132mm (5") over 23 days
5 days
of pure sunshine
23 days
of showers or rain

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


Sanibel Island in July

  • Average temperature: 29℃ (84℉)
  • Average high temperature: 31℃ (87℉)
  • Average low temperature: 27℃ (81℉)
  • Average humidity: 73%
  • Average sunny days: 4 days
  • Average rainfall: 163mm (6") over 25 days
4 days
of pure sunshine
25 days
of showers or rain

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


Sanibel Island in August

  • Average temperature: 29℃ (84℉)
  • Average high temperature: 31℃ (88℉)
  • Average low temperature: 27℃ (81℉)
  • Average humidity: 74%
  • Average sunny days: 2 days
  • Average rainfall: 212mm (8") over 27 days
2 days
of pure sunshine
27 days
of showers or rain

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


Sanibel Island in September

  • Average temperature: 28℃ (82℉)
  • Average high temperature: 30℃ (86℉)
  • Average low temperature: 26℃ (79℉)
  • Average humidity: 75%
  • Average sunny days: 3 days
  • Average rainfall: 157mm (6") over 25 days
3 days
of pure sunshine
25 days
of showers or rain

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

Sanibel Island in October

  • Average temperature: 26℃ (79℉)
  • Average high temperature: 28℃ (83℉)
  • Average low temperature: 24℃ (74℉)
  • Average humidity: 73%
  • Average sunny days: 13 days
  • Average rainfall: 79mm (3") over 15 days
13 days
of pure sunshine
15 days
of showers or rain

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


Sanibel Island in November

  • Average temperature: 23℃ (73℉)
  • Average high temperature: 25℃ (77℉)
  • Average low temperature: 20℃ (68℉)
  • Average humidity: 73%
  • Average sunny days: 18 days
  • Average rainfall: 31mm (1") over 9 days
18 days
of pure sunshine
9 days
of showers or rain

What to pack: If you’re heading to Sanibel Island 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.


Sanibel Island in December

  • Average temperature: 21℃ (69℉)
  • Average high temperature: 23℃ (74℉)
  • Average low temperature: 18℃ (64℉)
  • Average humidity: 77%
  • Average sunny days: 18 days
  • Average rainfall: 40mm (2") over 9 days
18 days
of pure sunshine
9 days
of showers or rain

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


Top FAQs

The hottest month of the year in Sanibel Island is usually August, where temperatures tend to rise to around 31℃ (88℉) in the middle of the day or early afternoon.
The month with the least amount of rain in Sanibel Island 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 Sanibel Island 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 Sanibel Island, or if you're just afraid of the dark, the days in July are usually the longest between sunrise and sunset.

Sanibel Island map