Your May weather guide
WarmWeather in Costa Adeje in May
May is a good time for Costa Adeje if you want warm, mostly dry days rather than strong summer heat. Average daytime highs of 21.5°C suit spending time outdoors, while nights around 16.3°C call for a light layer. The catch is the sea: at 20.2°C, it is bracing rather than comfortably warm. For a UK traveller, this is a sensible month for sunshine and relaxed outdoor days, provided warm-water swimming is not the priority.
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
- 21.5°C
- 9 in 10 days stay below 25°C
- Average night-time low
- 16.3°C
- coldest 10% of nights: 14°C or lower
- Compared with London
- +4.9°C
- London averages 16.6°C in May
- Sea temperature
- 20.2°C
- year to year: 19°C to 21°C
- Sunshine per day (est.)
- 9.3h
- 69% of 13.4 h of daylight
- Rainy days (1 mm+)
- 2
- 6 mm over the month
- Humidity
- 71%
- Days over 25°C
- 10%
- 1% over 30°C
- Record high 1991-2020
- 34.5°C
- 2003-05-22
- Record low 1991-2020
- 10.4°C
- 2018-05-01
- 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 May compares
May is the 6th warmest month of the year in Costa Adeje. Within Spain it is 62nd of 87 (Spain in May). Against London's average high of 16.6°C in May, Costa Adeje is 4.9°C warmer by day and 8.0°C warmer at night.
Daytime and night-time in May
The typical May day in Costa Adeje peaks at 21.5°C, but that is an average: the warmest 10% of days reach 24.8°C or more. Roughly 1 in 10 days top 25°C and 1 in 77 pass 30°C. Nights average 16.3°C; one night in ten drops to 14.3°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest May day here reached 34.5°C (2003-05-22) and the coldest night 10.4°C (2018-05-01).
Rain in May
Dry (3 rainy days or fewer): about 2 days with 1 mm or more, 6 mm in total. Year to year it varies a lot - the wettest May was 2020 with 39 mm, the driest 1999 with 0 mm. Humidity averages 71%.
Sea temperature in May
The sea averages 20.2°C - bracing (18-22°c). Depending on the year it ranges from 19.4°C to 20.9°C. For the warmest sea here, come in September (23.7°C).
Sunshine and daylight
Around 9.3 hours of sunshine a day (estimated from cloud cover), 13.4 hours of daylight: the sun rises about 07:17 and sets about 20:50 local time in mid-May. Average cloud cover is 30%.
Is May a good time to visit Costa Adeje?
It is a reasonable choice: warm days. The best months for Costa Adeje on our scoring are July, August, September; months averaging 25°C or more: Jul, Aug, Sep.
Reliable outdoor weather, without guaranteed heat
May offers about 9.3 hours of sunshine within 13.4 hours of daylight, giving you plenty of scope to spend time outside without squeezing everything into midday. Rain is unlikely to dominate a stay, with about 2 rainy days during the month, though a dry forecast is not a guarantee. Pack mainly light daytime clothing, plus sunglasses, sunscreen and something to cover up with in the sun. The warmth is generally moderate: only 10% of days reach 25°C, so do not book expecting consistently hot afternoons. That balance suits travellers who want to sit outside or be active without seeking intense heat. Keep some flexibility in your plans for the occasional wet spell.
Bracing swims and cooler evenings
The sea is the main compromise in May. Its year-to-year temperature range is 19°C to 21°C, so it can feel fresh even when the air is pleasant. If you enjoy cooler water, swimming may still appeal; if you prefer lingering in a warm sea, this month is less convincing. Bring something dry to put on afterwards rather than relying on the afternoon warmth alone. For evenings, a jumper or light jacket is a useful addition to your bag. The coldest 10% of nights fall to 14.3°C or below, so packing only shorts and sleeveless tops would leave you poorly prepared for sitting outdoors after dark.
A little perspective
Costa Adeje through the year
May 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% |
| MaySelected | 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% |
| Septemberbest | 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 May
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Costa Adeje in May FAQs
Plain answers, grounded in the averages.
Is Costa Adeje hot in May?
Costa Adeje is warm in May: the average daytime high is 21.5°C and nights average 16.3°C. Roughly 1 in 10 May days reach 25°C.
Can you swim in the sea in Costa Adeje in May?
The sea around Costa Adeje averages 20.2°C in May, which is bracing - fine for a quick dip, cool for long swims. Between 1991 and 2020 it ranged from 19°C to 21°C depending on the year.
How much does it rain in Costa Adeje in May?
Costa Adeje sees about 2 rainy days (1 mm or more) and 6 mm of rain in a typical May. The wettest May between 1991 and 2020 was 2020 (39 mm) and the driest was 1999 (0 mm).
How sunny is Costa Adeje in May?
Costa Adeje gets around 9.3 hours of sunshine a day in May out of 13.4 hours of daylight (estimated from average cloud cover).
How does Costa Adeje compare with the UK in May?
Costa Adeje is on average 4.9°C warmer than London by day in May (21.5°C against 16.6°C).
What is the hottest May on record in Costa Adeje?
Between 1991 and 2020 the hottest May day in Costa Adeje reached 34.5°C on 2003-05-22, and the coldest night dropped to 10.4°C on 2018-05-01.
How much warmer is Costa Adeje than London in May?
Costa Adeje's average daytime high is 21.5°C, compared with 16.6°C in London, a difference of 4.9°C. That is a noticeable lift in daytime warmth, but it still points to mild-to-warm holiday weather rather than dependable summer heat.
Should I choose May or wait until later in summer?
Choose May if warm days and little rain matter more than strong heat or a warm sea. July, August and September are the better-rated months overall here. May's main compromise is swimming comfort, so bear that in mind if sea time is central to your holiday.
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