What to wear to Waterbomb Festival: Seoul sits at 30°C (86°F) by day and 24°C (75°F) at night in July, on arena grounds, with a high chance of rain. That means loose natural fabrics and real sun protection, cushioned trainers or a low boot, and a bag small enough for the gate rules. The crowd leans water, k-pop and streetwear, so anything that survives the day reads as right.
Women's outfits at Waterbomb Festival have to clear the same three hurdles as everyone else's. 30°C (86°F) by day, 24°C (75°F) at night, arena grounds underfoot, with more options for solving them.
The short version: Swimwear-plus: nothing white, nothing that must stay dry, nothing that needs a phone in a pocket.
The dominant aesthetics at Waterbomb Festival are get-soaked practical, K-pop, streetwear and poolwear. That is the visual language of the site, the stages, the merch, the crowd photos, and outfits that speak it look intentional rather than borrowed.
There is no enforced dress code. What the crowd rewards is a look that survives 3 days of arena grounds without you having to protect it.
What people actually wear: as little fabric as the venue allows, in natural fibres, with a bag small enough to forget about.