Sousse is warmest in August, averaging 33° by day and 25° at night. The wettest month is September with 63 mm, and the year brings about 338 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 17° | 10° | 12 mm | 16° | 9.8 h | Sightseeing |
| February | 18° | 9° | 17 mm | 15° | 10.7 h | Sightseeing |
| March | 19° | 11° | 47 mm | 15° | 11.7 h | Sightseeing |
| April | 21° | 13° | 33 mm | 17° | 12.9 h | Sightseeing |
| May | 25° | 16° | 28 mm | 20° | 13.9 h | Sightseeing |
| June | 29° | 20° | 12 mm | 23° | 14.4 h | Beach weather |
| July | 33° | 24° | 3 mm | 27° | 14.2 h | Beach weather |
| August | 33° | 25° | 9 mm | 28° | 13.4 h | Beach weather |
| September | 30° | 23° | 63 mm | 27° | 12.2 h | Beach weather |
| October | 26° | 19° | 47 mm | 25° | 11.1 h | Beach weather |
| November | 22° | 15° | 27 mm | 22° | 10.1 h | Sightseeing |
| December | 19° | 12° | 40 mm | 18° | 9.6 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: June, July, August, September and October — highs around 30°, nights no colder than 19°, and at most 63 mm of rain in a month. The sea sits at 23–28° then.
Walking the city: January, February, March, April, May, November and December — highs of 17–25° and no more than 47 mm of rain a month.