Click on a day for an hourly weather forecast
The temperatures in Sanibel during August are extremely high, between 27°C and hot as 31°C, drinking water regularly is advisable.
There’s going to be many days of rain during the month of August in Sanibel.
Sanibel should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Sanibel in August 2025.
If you’re planning to visit Sanibel in the near future, we highly recommend that you review the 14 day weather forecast for Sanibel before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 21° / 16° | 3 | 28 | 0 | 69 mm | Good | Sanibel in January |
| February | 22° / 17° | 2 | 26 | 0 | 50 mm | Good | Sanibel in February |
| March | 24° / 18° | 3 | 28 | 0 | 62 mm | Perfect | Sanibel in March |
| April | 26° / 21° | 5 | 26 | 0 | 75 mm | Perfect | Sanibel in April |
| May | 28° / 24° | 8 | 23 | 0 | 170 mm | Good | Sanibel in May |
| June | 30° / 26° | 14 | 16 | 0 | 316 mm | Ok | Sanibel in June |
| July | 31° / 27° | 18 | 13 | 0 | 390 mm | Ok | Sanibel in July |
| August | 31° / 27° | 19 | 12 | 0 | 458 mm | Ok | Sanibel in August |
| September | 31° / 26° | 15 | 15 | 0 | 389 mm | Ok | Sanibel in September |
| October | 29° / 24° | 7 | 24 | 0 | 166 mm | Ok | Sanibel in October |
| November | 25° / 20° | 2 | 28 | 0 | 74 mm | Perfect | Sanibel in November |
| December | 23° / 18° | 3 | 28 | 0 | 60 mm | Perfect | Sanibel in December |