Your September weather guide
HotWeather in Hammamet in September
September is a good choice for Hammamet if you want hot days and a sea that still feels warm, but can accept some rain. Average daytime highs are 28°C, the sea is around 26°C, and there are about 6 rainy days during the month. For a UK traveller, this suits a swimming holiday with time outdoors, provided you are comfortable with midday heat and do not need every day to be dry.
Long-term climate averages for Hammamet, not a forecast · 1991-2020
Hammamet, month by month
Your snapshot
At a glance
The useful details for Hammamet.
- Average daytime high
- 28.0°C
- 9 in 10 days stay below 31°C
- Average night-time low
- 21.4°C
- coldest 10% of nights: 19°C or lower
- Compared with London
- +9.4°C
- London averages 18.6°C in September
- Sea temperature
- 26.0°C
- year to year: 25°C to 27°C
- Sunshine per day (est.)
- 7.7h
- 63% of 12.2 h of daylight
- Rainy days (1 mm+)
- 6
- 44 mm over the month
- Humidity
- 73%
- Days over 25°C
- 90%
- 20% over 30°C
- Record high 1991-2020
- 35.1°C
- 1993-09-08
- Record low 1991-2020
- 15.6°C
- 2020-09-28
- Flight from London
- ≈ 3 h 6 min
- 1851 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How September compares
September is the 3rd warmest month of the year in Hammamet and ranks 49th of 134 destinations we compare for September - see where else is hot in September. Within Tunisia it is 3rd of 3 (Tunisia in September). Against London's average high of 18.6°C in September, Hammamet is 9.4°C warmer by day and 10.2°C warmer at night.
Daytime and night-time in September
The typical September day in Hammamet peaks at 28.0°C, but that is an average: the warmest 10% of days reach 31.1°C or more. About 90% of days top 25°C and 1 in 5 pass 30°C. Nights average 21.4°C; one night in ten drops to 18.9°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 35.1°C (1993-09-08) and the coldest night 15.6°C (2020-09-28).
Rain in September
Some rain (4-8 rainy days): about 6 days with 1 mm or more, 44 mm in total. Year to year it varies a lot - the wettest September was 1997 with 174 mm, the driest 1999 with 2 mm. Humidity averages 73%.
Sea temperature in September
The sea averages 26.0°C - warm enough to swim (22°c+). Depending on the year it ranges from 25.3°C to 26.8°C. For the warmest sea here, come in August (26.7°C).
Sunshine and daylight
Around 7.7 hours of sunshine a day (estimated from cloud cover), 12.2 hours of daylight: the sun rises about 06:00 and sets about 18:26 local time in mid-September. Average cloud cover is 37%.
Is September a good time to visit Hammamet?
Yes - it is one of the better months: hot days, manageable rain and long sunny days. The best months for Hammamet on our scoring are July, August, June; months averaging 25°C or more: Jun, Jul, Aug, Sep.
Hot days, with little need for heavy evening layers
Hammamet is noticeably warmer than London in September: its average daytime high is 28°C, compared with London's 18.6°C. Days reach 25°C around 90% of the time, so light clothing is a sensible starting point rather than a hopeful addition to your bag. The catch is that 20% of days reach 30°C, and humidity averages 73%, which can make the heat feel sticky. Keep more active plans for the cooler parts of the day and leave room for shade at midday. Average night lows are around 21°C, so evenings generally call for light clothes, with a light layer useful if you feel the cold.
Plenty of outdoor time, but allow for rain
Expect useful sunshine rather than an entirely cloudless holiday: September averages about 7.7 hours of sunshine within 12.2 hours of daylight. That leaves plenty of scope for swimming and relaxed time outside, while about 6 rainy days make a flexible schedule sensible. A light waterproof is worth packing, and it helps not to pin all your outdoor plans on a particular day. The sea is a strong reason to choose this month, averaging 26°C, so swimming need not depend on the hottest afternoons. Overall, September suits travellers who want warmth without insisting on completely dry weather; it is less suitable if humid heat quickly becomes uncomfortable.
A little perspective
Hammamet through the year
September is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 15.2°C | 9.8°C | 15.7°C | 5.1 | 39 | 7 | 0% |
| February | 15.4°C | 9.4°C | 14.6°C | 5.8 | 38 | 7 | 0% |
| March | 17.6°C | 10.8°C | 14.7°C | 6.4 | 44 | 7 | 1% |
| April | 19.8°C | 12.8°C | 15.9°C | 7.2 | 37 | 7 | 2% |
| May | 23.5°C | 15.7°C | 18.5°C | 8.7 | 21 | 4 | 26% |
| Junebest | 27.8°C | 19.2°C | 22.0°C | 11.0 | 10 | 2 | 88% |
| Julybest | 30.9°C | 22.0°C | 25.2°C | 12.9 | 2 | 0 | 100% |
| Augustbest | 31.4°C | 23.0°C | 26.7°C | 11.4 | 9 | 2 | 100% |
| SeptemberSelected | 28.0°C | 21.4°C | 26.0°C | 7.7 | 44 | 6 | 90% |
| October | 24.4°C | 18.6°C | 23.8°C | 6.1 | 55 | 7 | 42% |
| November | 19.9°C | 14.5°C | 21.0°C | 5.4 | 43 | 7 | 2% |
| December | 16.4°C | 11.3°C | 18.1°C | 5.1 | 40 | 7 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in September
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Hammamet in September FAQs
Plain answers, grounded in the averages.
Is Hammamet hot in September?
Hammamet is hot in September: the average daytime high is 28.0°C and nights average 21.4°C. About 90% of September days reach 25°C or more.
Can you swim in the sea in Hammamet in September?
The sea around Hammamet averages 26.0°C in September, which is warm enough for most people to swim comfortably. Between 1991 and 2020 it ranged from 25°C to 27°C depending on the year.
How much does it rain in Hammamet in September?
Hammamet sees about 6 rainy days (1 mm or more) and 44 mm of rain in a typical September. The wettest September between 1991 and 2020 was 1997 (174 mm) and the driest was 1999 (2 mm).
How sunny is Hammamet in September?
Hammamet gets around 7.7 hours of sunshine a day in September out of 12.2 hours of daylight (estimated from average cloud cover).
How does Hammamet compare with the UK in September?
Hammamet is on average 9.4°C warmer than London by day in September (28.0°C against 18.6°C).
What is the hottest September on record in Hammamet?
Between 1991 and 2020 the hottest September day in Hammamet reached 35.1°C on 1993-09-08, and the coldest night dropped to 15.6°C on 2020-09-28.
Is the sea warm enough for swimming in September?
Yes. The sea averages 26°C, with a year-to-year range of 25°C to 27°C. That makes September a good fit if swimming is central to your holiday, rather than something you would only consider on an especially hot day.
How long is the flight from London?
The flight from London is about 3 h 6 min, putting Hammamet within short-haul reach. That makes it a practical option if you want noticeably warmer September weather without a long flight, though you should still allow for some rain.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Hammamet. Sea temperature from the nearest 5 km sea cell, 2.9 km from that point. Sunshine hours are estimated from average cloud cover.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