Weather in Split in August

How August compares

August is the 1st warmest month of the year in Split and ranks 55th of 134 destinations we compare for August - see where else is hot in August. Within Croatia it is 1st of 4 (Croatia in August). Against London's average high of 21.4°C in August, Split is 7.9°C warmer by day and 7.2°C warmer at night.

Daytime and night-time in August

The typical August day in Split peaks at 29.3°C, but that is an average: the warmest 10% of days reach 32.9°C or more. About 94% of days top 25°C and 1 in 2 pass 30°C. Nights average 20.7°C; one night in ten drops to 17.9°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 39.8°C (2017-08-02) and the coldest night 13.1°C (1995-08-30).

Rain in August

Some rain (4-8 rainy days): about 5 days with 1 mm or more, 41 mm in total. Year to year it varies a lot - the wettest August was 2002 with 163 mm, the driest 2012 with 1 mm. Humidity averages 62%.

Sea temperature in August

The sea averages 24.6°C - warm enough to swim (22°c+). Depending on the year it ranges from 23.3°C to 25.7°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), 13.8 hours of daylight: the sun rises about 05:59 and sets about 19:58 local time in mid-August. Average cloud cover is 23%.

Is August a good time to visit Split?

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

Expect proper summer heat, not just warm afternoons

Pack for hot weather rather than a typical British summer. Temperatures reach 30°C on 41% of days, while the hottest days can climb to 33°C or more. That makes morning and later afternoon the more comfortable times for walking, with shade and a slower pace sensible around midday. Light, breathable clothes, sun protection and somewhere cool to sleep should be priorities. Average night lows of 21°C mean evenings generally stay warm, although a light layer is useful if you feel the cold. If you enjoy heat and can organise your day around it, August works well. If cooler weather is central to your holiday, it is a less comfortable choice.

Good swimming weather, with some allowance for rain

The sea is a strong reason to choose August. At around 25°C on average, it is warm enough for swimming rather than just a quick cooling dip; the year-to-year range of 23°C to 26°C also points to generally comfortable water. Sunshine averages about 10.6 hours within 13.8 hours of daylight, leaving plenty of scope to swim outside the hottest part of the day. Keep sun protection handy even when a swim makes the heat feel less noticeable. Rain falls on about 4 days during the month, so do not treat August as completely dry. A flexible plan and a light waterproof are sensible, but the balance favours outdoor time. For a holiday built around swimming and relaxed days, the weather is a good fit.