Your September weather guide
HotWeather in Costa Adeje in September
September is a good time to visit Costa Adeje if you want warm days, comfortable sea swimming and little rain without relying on extreme heat. Average highs are around 25°C, nights stay near 20°C and the sea is about 24°C. It suits a holiday spent mostly outdoors, with light clothing and relaxed evenings. The catch is that humidity can make the warmth feel close, and hotter spells are still possible.
Long-term climate averages for Adeje, not a forecast · 1991-2020
Costa Adeje, month by month
Your snapshot
At a glance
The useful details for Adeje.
- Average daytime high
- 25.3°C
- 9 in 10 days stay below 28°C
- Average night-time low
- 20.2°C
- coldest 10% of nights: 18°C or lower
- Compared with London
- +6.7°C
- London averages 18.6°C in September
- Sea temperature
- 23.7°C
- year to year: 23°C to 24°C
- Sunshine per day (est.)
- 8.8h
- 72% of 12.2 h of daylight
- Rainy days (1 mm+)
- 2
- 9 mm over the month
- Humidity
- 74%
- Days over 25°C
- 49%
- 3% over 30°C
- Record high 1991-2020
- 36.7°C
- 2005-09-04
- Record low 1991-2020
- 15.6°C
- 2018-09-10
- Flight from London
- ≈ 4 h 24 min
- 2911 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 Costa Adeje. Within Spain it is 65th of 87 (Spain in September). Against London's average high of 18.6°C in September, Costa Adeje is 6.7°C warmer by day and 9.0°C warmer at night.
Daytime and night-time in September
The typical September day in Costa Adeje peaks at 25.3°C, but that is an average: the warmest 10% of days reach 28.0°C or more. Roughly 1 in 2 days top 25°C and 1 in 37 pass 30°C. Nights average 20.2°C; one night in ten drops to 18.4°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 36.7°C (2005-09-04) and the coldest night 15.6°C (2018-09-10).
Rain in September
Dry (3 rainy days or fewer): about 2 days with 1 mm or more, 9 mm in total. Year to year it varies a lot - the wettest September was 2010 with 62 mm, the driest 2000 with 0 mm. Humidity averages 74%.
Sea temperature in September
The sea averages 23.7°C - warm enough to swim (22°c+). Depending on the year it ranges from 23.1°C to 24.4°C. This is the warmest the sea gets here all year.
Sunshine and daylight
Around 8.8 hours of sunshine a day (estimated from cloud cover), 12.2 hours of daylight: the sun rises about 07:52 and sets about 20:12 local time in mid-September. Average cloud cover is 28%.
Is September a good time to visit Costa Adeje?
Yes - it is one of the better months: hot days, little rain and long sunny days. The best months for Costa Adeje on our scoring are July, August, September; months averaging 25°C or more: Jul, Aug, Sep.
Warm enough for summer clothes, but rarely very hot
Expect reliably warm conditions rather than relentless heat. September is among Costa Adeje's warmest months, yet only 3% of days reach 30°C. Days reach 25°C about 49% of the time, so do not assume every afternoon will be hotter than that. With humidity at 74%, loose, breathable clothing is a sensible choice, especially around midday. There is about 8.8 hours of sunshine daily, giving you plenty of scope to spend time outside without concentrating everything into the hottest part of the day. Evenings generally stay warm enough for light clothing, though a light layer is useful if you tend to feel cool when sitting outdoors.
Good swimming weather, with rain unlikely to dominate
The sea is a strong reason to choose September: at an average 23.7°C, it is warm enough for swimming rather than just a quick dip. The year-to-year range of 23°C to 24°C also suggests fairly consistent sea warmth, though personal comfort varies. Rain is usually a minor consideration, with about 2 rainy days during the month. That makes outdoor plans a reasonable default, but it is not a promise of completely dry weather throughout your stay. Pack sun protection and swimwear as priorities, and keep plans flexible if rain arrives. September particularly suits travellers who want swimming and warmth without needing very hot afternoons.
A little perspective
Costa Adeje 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 | 18.5°C | 13.9°C | 19.9°C | 6.2 | 27 | 5 | 0% |
| February | 18.7°C | 14.0°C | 19.3°C | 7.0 | 39 | 5 | 2% |
| March | 19.6°C | 14.6°C | 19.2°C | 7.5 | 30 | 5 | 4% |
| April | 20.1°C | 15.1°C | 19.5°C | 8.1 | 23 | 4 | 5% |
| May | 21.5°C | 16.3°C | 20.2°C | 9.3 | 6 | 2 | 10% |
| June | 23.5°C | 18.1°C | 21.3°C | 11.4 | 3 | 1 | 21% |
| Julybest | 26.3°C | 20.4°C | 22.1°C | 12.2 | 0 | 0 | 60% |
| Augustbest | 26.9°C | 21.2°C | 23.0°C | 11.2 | 3 | 1 | 73% |
| SeptemberSelectedbest | 25.3°C | 20.2°C | 23.7°C | 8.8 | 9 | 2 | 49% |
| October | 23.7°C | 19.1°C | 23.6°C | 6.7 | 26 | 5 | 23% |
| November | 21.5°C | 17.1°C | 22.5°C | 5.6 | 30 | 6 | 9% |
| December | 19.5°C | 15.2°C | 21.0°C | 5.6 | 58 | 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.
Mauritius · 26°C by day · sea 24°C
Flic en Flac
Greece · 25°C by day · sea 25°C
Parga
Italy · 25°C by day · sea 24°C
Puglia
Italy · 26°C by day · sea 24°C
Sardinia
Greece · 25°C by day · sea 25°C
Kefalonia
A little more detail
Costa Adeje in September FAQs
Plain answers, grounded in the averages.
Is Costa Adeje hot in September?
Costa Adeje is hot in September: the average daytime high is 25.3°C and nights average 20.2°C. Roughly 1 in 2 September days reach 25°C.
Can you swim in the sea in Costa Adeje in September?
The sea around Costa Adeje averages 23.7°C in September, which is warm enough for most people to swim comfortably. Between 1991 and 2020 it ranged from 23°C to 24°C depending on the year.
How much does it rain in Costa Adeje in September?
Costa Adeje sees about 2 rainy days (1 mm or more) and 9 mm of rain in a typical September. The wettest September between 1991 and 2020 was 2010 (62 mm) and the driest was 2000 (0 mm).
How sunny is Costa Adeje in September?
Costa Adeje gets around 8.8 hours of sunshine a day in September out of 12.2 hours of daylight (estimated from average cloud cover).
How does Costa Adeje compare with the UK in September?
Costa Adeje is on average 6.7°C warmer than London by day in September (25.3°C against 18.6°C).
What is the hottest September on record in Costa Adeje?
Between 1991 and 2020 the hottest September day in Costa Adeje reached 36.7°C on 2005-09-04, and the coldest night dropped to 15.6°C on 2018-09-10.
How much warmer is Costa Adeje than London in September?
Costa Adeje's average daytime high is 25.3°C, compared with 18.6°C in London - a difference of 6.7°C. That is a noticeable step up in warmth for a UK traveller, making summer clothing a more practical default.
Is Costa Adeje a short-haul option from London?
Yes. The flight from London is about 4 h 24 min, putting Costa Adeje within short-haul reach. For a September trip, that gives you warm days and a swimmable sea without a long-haul flight.
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 Adeje. Sea temperature from the nearest 5 km sea cell, 4.8 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