Weather in Costa Blanca in August

How August compares

August is the 1st warmest month of the year in Costa Blanca. Within Spain it is 18th of 87 (Spain in August). Against London's average high of 21.4°C in August, Costa Blanca is 8.7°C warmer by day and 9.0°C warmer at night.

Daytime and night-time in August

The typical August day in Costa Blanca peaks at 30.1°C, but that is an average: the warmest 10% of days reach 32.7°C or more. About 98% of days top 25°C and 1 in 2 pass 30°C. Nights average 22.5°C; one night in ten drops to 20.7°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 38.5°C (2012-08-12) and the coldest night 16.8°C (1998-08-03).

Rain in August

Dry (3 rainy days or fewer): about 3 days with 1 mm or more, 17 mm in total. Year to year it varies a lot - the wettest August was 2017 with 87 mm, the driest 1992 with 0 mm. Humidity averages 68%.

Sea temperature in August

The sea averages 26.4°C - warm enough to swim (22°c+). Depending on the year it ranges from 25.7°C to 27.2°C. This is the warmest the sea gets here all year.

Sunshine and daylight

Around 10.0 hours of sunshine a day (estimated from cloud cover), 13.5 hours of daylight: the sun rises about 07:17 and sets about 20:56 local time in mid-August. Average cloud cover is 26%.

Is August a good time to visit Costa Blanca?

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

Expect heat that lasts into the evening

The average high does not tell the whole story: 52% of August days reach 30°C, so that level of heat is routine rather than exceptional. The hottest days can push higher, making shade and a slower pace sensible around midday. Humidity averages 68%, which can add to the sticky feel, particularly when you are walking about. Plan more active outings for the morning and leave room for an indoor break later. Loose, breathable clothes are more useful than heavy layers, and air conditioning is a sensible accommodation priority. With average night lows of 22.5°C, evenings offer some relief, but do not expect a distinctly cool end to the day.

Good swimming weather, with little rain

Rain is unlikely to dominate your plans, with about 3 rainy days during August, though dry weather is not guaranteed throughout your stay. Around 10 hours of sunshine within 13.5 hours of daylight gives you plenty of scope to move outdoor time away from the strongest midday heat. The sea is firmly in comfortable swimming territory, so this month suits travellers who want to spend time in the water rather than just sit beside it. Keep sun protection, drinking water and access to shade central to your daily plans. A flexible approach is enough for the occasional wet spell; managing the heat is likely to matter more than planning around rain.