What to wear to Audioriver: Płock sits at 25°C (77°F) by day and 14°C (57°F) at night in July, on beach, with a moderate chance of rain. That means a light base with one warm layer you can carry, flat sandals you can rinse, with trainers for the night stages, and a bag small enough for the gate rules. The crowd leans techno, beach and underground, so black and functional reads as insider.
Women's outfits at Audioriver have to clear the same three hurdles as everyone else's. 25°C (77°F) by day, 14°C (57°F) at night, beach underfoot, with more options for solving them.
The dominant aesthetics at Audioriver are techno black, beachwear, underground and camp-practical. 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.
This is a function-first crowd. Black, utility and good shoes read as insider; heavy glitter and fancy dress read as tourist. Nobody is stopping you, but you will feel it.
What people actually wear: one good layer over a light base, because the temperature halves after sunset; the same jacket every day, because it lives in the tent and does everything.