Ostrava hosts 2 festivals in this guide: Colours of Ostrava, Beats for Love.
Ostrava has 2 festivals in this guide. They run in July, and festival-day temperatures range from 25°C (77°F) to 25°C (77°F), with nights down to 14°C (57°F). That range is the reason there is no single "Ostrava festival outfit". The answer changes by month and by site.
Conditions are moderate across the board, so the day-to-night temperature drop is the thing to plan for rather than the weather itself.
The ground matters as much as the sky. Every festival here is on industrial site, which puts broken-in trainers or a low boot at the top of the list for most of these events. 2 of the 2 have camping on site, so outfits have to survive living in a bag on the ground for several days.
Stylistically the crowd here leans industrial, indie, boho and camping. Colours of Ostrava is the largest of them at around 50,000 people, and it sets the tone the smaller ones react to. None of that is a dress code. It is what you will see, which is worth knowing if you would rather blend in or deliberately not.
