Sanibel Island weather in August 2025

Q: How hot is it in Sanibel Island in August?

Daytime temperatures usually reach 33°C in Sanibel Island in August with very high heat and humidity, falling to 24°C at night.

Q: How sunny is it in Sanibel Island in August?

There are normally 9 hours of bright sunshine each day in Sanibel Island in August - that's 67% of daylight hours.

Q: How warm is the sea around Sanibel Island in August?

The average sea temperature around Sanibel Island in August is 30°C.

Q: Does it rain in Sanibel Island in August?

There are usually 16 days with some rain in Sanibel Island in August and the average monthly rainfall is 223mm.

Q: What is the chance of a cyclone in Sanibel Island in August?

On average 1.1 days in August in Sanibel Island are likely to be affected by the passage of one or more tropical storms.

Expect 91°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Sanibel Island in August. Check more long-term weather averages for Sanibel Island in August before you book your next holiday to Florida in 2025/2026.

91
91°F max day temperature
9
9 hours of sunshine per day
16
16 days with some rainfall
75
75°F min night temperature
13
13 hours of daylight per day
VH
Very High heat & humidity
8.8
8.8 inches of monthly rainfall
11
11 (Extreme) UV index
86
86°F sea temperature

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The August weather guide for Florida (Sanibel Island) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

More about Florida

How hot is it in Sanibel Island in August?

Daytime temperatures usually reach 91°F in Sanibel Island in August with very high heat and humidity, falling to 75°F at night.

How sunny is it in Sanibel Island in August?

There are normally 9 hours of bright sunshine each day in Sanibel Island in August - that's 67% of daylight hours.

How warm is the sea around Sanibel Island in August?

The average sea temperature around Sanibel Island in August is 86°F.

Does it rain in Sanibel Island in August?

There are usually 16 days with some rain in Sanibel Island in August and the average monthly rainfall is 8.8 inches.

What is the chance of a hurricane in Sanibel Island in August?

On average 1.1 days in August in Sanibel Island are likely to be affected by the passage of one or more tropical storms.

Sanibel Island August sunrise & sunset times

Browse the sunrise and sunset times for Sanibel Island in August 2025. Select a month to view Sanibel Island sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Friday, 1st August 2025	05:54	19:15
Saturday, 16th August 2025	06:01	19:03
Sunday, 31st August 2025	06:08	18:49

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Florida - quick facts
Flight time^✝	9.5 hours
Time difference	UK -5 to -6 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Beaches Culture Nature Nightlife
Tourist info	Visit Florida