#1Hot
Sousse
- Day
- 30.6°C
- Sea
- 26.1°C
- Sun
- 8.0h
- Rain days
- 5
Your September weather guide
Weather in Tunisia in September
Yes - September is a good month for Tunisia if you want warm sea swimming and hot days, rather than mild sightseeing weather. Country averages put daytime temperatures at 30°C and the sea at 26°C, so the water remains a strong reason to go. The catch is that summer clothing still needs to come with sun protection, and there are 5 rainy days on average. Your choice of resort mainly changes how hot the afternoons feel.
Long-term climate averages, not a forecast · 1991-2020
- Average daytime high
- 29.5°Cacross 3 destinations
- Average night-time low
- 21.0°Cafter dark
- Sea temperature
- 26.1°Cwarm enough to swim
- Rainy days
- 5days1 mm or more
Tunisia, month by month
Turn up the warmth
Warmest places in Tunisia in September
Ranked by average daytime high. The full comparison is in the table below.
#2Hot
Port El Kantaoui
- Day
- 30.0°C
- Sea
- 26.1°C
- Sun
- 7.9h
- Rain days
- 5
#3Hot
Hammamet
- Day
- 28.0°C
- Sea
- 26.0°C
- Sun
- 7.7h
- Rain days
- 6
Tunisia destinations ranked for September
All 3 places we track in Tunisia, ordered by daytime high.
Scroll sideways for more weather, down for more places. Click a heading to sort.
| # | Destination | ||||||
|---|---|---|---|---|---|---|---|
| 1 | Sousse | 30.6°C | 20.7°C | 26.1°C | 8.0 h | 5 | 3 h 6 min |
| 2 | Port El Kantaoui | 30.0°C | 21.0°C | 26.1°C | 7.9 h | 5 | 3 h 6 min |
| 3 | Hammamet | 28.0°C | 21.4°C | 26.0°C | 7.7 h | 6 | 3 h 6 min |
3 destinations shownClimate averages, not a forecast.
September climate overview
Daytime highs across Tunisia in September run from 28.0°C (Hammamet) to 30.6°C (Sousse). In Sousse about 95% of September days reach 25°C. Nights average 21.0°C; the coldest 10% of nights in Hammamet fall to 19°C or below.
Rainfall in September
Expect around 5 rainy days (1 mm or more) in September, with Port El Kantaoui the driest (5 days) and Hammamet the wettest (6 days). The wettest September at Sousse between 1991 and 2020 was 1997 with 168 mm; the driest was 1992 with 4 mm.
Sea temperature
The sea averages 26.1°C around Tunisia in September - warmest at Sousse (26.1°C). That is comfortable for swimming.
Sunshine and daylight
Around 7.9 hours of sunshine a day on average, out of 12.2 hours of daylight (sunshine estimated from cloud cover).
September against the rest of the year in Tunisia
September is the 4th warmest month of the twelve in Tunisia. It is 3.8°C cooler than August and 3.9°C cooler in October. The hottest month here is August (33°C) and the coolest January (16°C).
Which part of Tunisia in September?
- Most sunshine: Sousse, 8.0 h a day.
- Driest: Port El Kantaoui, about 5 rainy days.
- Warmest sea: Sousse, 26°C.
- Hottest: Sousse, 31°C by day.
- Coolest (better for walking and cities): Hammamet, 28°C.
What to pack for Tunisia in September
Based on the averages: summer clothes for the day; a light waterproof for the odd shower; swimwear - the sea is 26°C.
Similar weather elsewhere in September
Within 1.5°C of Tunisia's September daytime average: Montego Bay (31°C, sea 30°C), Bangkok (31°C, sea 29°C), Seville (30°C), Limassol (30°C, sea 27°C), Puerto Vallarta (30°C, sea 30°C). See the full ranking for September.
Where to stay: Hammamet for less heat, Sousse for more
Among these resorts, Hammamet is the better fit if you prefer less intense daytime heat: its average high is 28°C, compared with 31°C in Sousse. Port El Kantaoui sits between them at 30°C, making it a compromise rather than a noticeably cool option. Sousse suits travellers who actively want hot weather, but Hammamet gives you more comfortable conditions for spending time outdoors. There is no sea-temperature trade-off, with 26°C water at each resort. Evenings are equally warm on average, too. Hammamet has 6 rainy days against 5 in Sousse and Port El Kantaoui, a small difference rather than a strong reason to choose elsewhere.
Plan around the heat, but leave room for rain
With average sunshine of 7.9 hours, September still calls for a sun hat, sunscreen and light, breathable clothing. Put more active plans in the cooler parts of the day and leave room for shade around midday, especially if you choose Sousse. The warm sea makes swimming an appealing part of the day, though sea temperature alone does not tell you what conditions will be like on the shore. Rain is possible, so keep your plans flexible rather than expecting an entirely dry holiday. A light waterproof is a sensible addition to your bag; you do not need to build the whole trip around wet-weather alternatives.
A little more detail
Tunisia in September FAQs
Plain answers, grounded in the averages.
Where is the hottest place in Tunisia in September?
Sousse is the warmest of the 3 places we track in Tunisia in September with an average high of 30.6°C; Hammamet is the coolest at 28.0°C.
Is the sea warm in Tunisia in September?
The sea averages 22°C or more at Sousse (26°C), Port El Kantaoui (26°C), Hammamet (26°C) in September.
How much warmer does Tunisia feel than London in September?
Tunisia's average daytime temperature is 30°C, compared with London's 19°C. That makes it a hot-weather trip rather than a mild extension of home conditions. Pack for heat and plan shade breaks, particularly if you find warm afternoons tiring.
Will I need warm clothes in the evenings?
Average night temperatures are 21°C in Sousse, Port El Kantaoui and Hammamet, so evenings generally call for light clothing rather than heavy layers. Bring a light layer if you tend to feel cool when sitting outside, but warm nights are the overall expectation.
Is Sousse reliably hot in September?
Sousse is the hottest of these destinations, with an average daytime temperature of 31°C and 95% of days above 25°C. It is the clearest choice if heat is your priority; Hammamet is a better fit if you want a gentler daytime average.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid), 1991-2020
Averages computed from daily values at 3 destination points.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C