Cardiff Weather in August

Mild and comfortable, with some rainy days. Average highs of 20°C and lows of 13°C, with around 14 rainy days expected throughout the month.

While August isn't our top-rated month for Cardiff, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.

Average high

20°C

Average low

13°C

Rainy days

14 days

Best months to visit

Year-round

What to do in Cardiff in August

Whatever the weather, Cardiff rewards curious visitors. Here are some of the best ways to spend your time:

Tour Cardiff Castle from Roman times Visit the National Museum Cardiff (free) Explore the Victorian and Edwardian shopping arcades Walk Bute Park and see Cathays Park's government buildings Day trip to nearby Caerphilly Castle Catch rugby at the Millennium Stadium

What to pack for August

Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.