Weather in Ibiza in August

How August compares

August is the 1st warmest month of the year in Ibiza and ranks 27th of 134 destinations we compare for August - see where else is hot in August. Within Spain it is 6th of 87 (Spain in August). Against London's average high of 21.4°C in August, Ibiza is 9.5°C warmer by day and 9.9°C warmer at night.

Daytime and night-time in August

The typical August day in Ibiza peaks at 30.9°C, but that is an average: the warmest 10% of days reach 33.4°C or more. About 99% of days top 25°C and almost every pass 30°C. Nights average 23.4°C; one night in ten drops to 21.7°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 36.3°C (1999-08-25) and the coldest night 18.2°C (2007-08-23).

Rain in August

Dry (3 rainy days or fewer): about 2 days with 1 mm or more, 14 mm in total. Year to year it varies a lot - the wettest August was 1996 with 128 mm, the driest 2003 with 0 mm. Humidity averages 65%.

Sea temperature in August

The sea averages 26.5°C - warm enough to swim (22°c+). Depending on the year it ranges from 25.9°C to 27.1°C. This is the warmest the sea gets here all year.

Sunshine and daylight

Around 10.6 hours of sunshine a day (estimated from cloud cover), 13.5 hours of daylight: the sun rises about 07:08 and sets about 20:50 local time in mid-August. Average cloud cover is 22%.

Is August a good time to visit Ibiza?

Yes - it is one of the better months: hot days, little rain and long sunny days. The best months for Ibiza on our scoring are July, June, August; months averaging 25°C or more: Jun, Jul, Aug, Sep.

Expect sustained heat, not just the occasional hot day

Days reaching 30°C account for 73% of August, so plan around heat rather than treating it as an exception. The hottest days can push beyond 33.4°C, making exposed walking less appealing around midday. Put more active plans in the morning, leave room for shade breaks, and carry water when you head out. Humidity averages 65%, so the warmth may feel sticky rather than crisp, particularly when there is little air movement. Loose, breathable clothing is the practical choice, including for evenings. The main catch is the limited overnight cooling: if you need a cool bedroom, check the air conditioning before booking rather than relying on an open window.

Good swimming weather, with little rain to plan around

The sea is warm enough for swimming without the bracing start associated with cooler months, which makes August well suited to a holiday built around time in the water. Sunshine averages about 10.6 hours within 13.5 hours of daylight, leaving plenty of flexibility to swim earlier or later rather than staying out through the strongest midday heat. Sunscreen, a hat and access to shade deserve more attention in your packing than wet-weather clothing. There are about 2 rainy days, so a shower is possible, but rain is not the main drawback. Keep plans flexible rather than assuming every day will be completely dry.