What to wear to Baja Beach Fest: Rosarito sits at 27°C (81°F) by day and 19°C (66°F) at night in August, on beach, with a low 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 beach, tropical and y2k, so anything that survives the day reads as right.
Women's outfits at Baja Beach Fest have to clear the same three hurdles as everyone else's. 27°C (81°F) by day, 19°C (66°F) at night, beach underfoot, with more options for solving them.
The dominant aesthetics at Baja Beach Fest are beachwear, tropical, Y2K revival and high glam. 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 6 days of beach without you having to protect it.
What people actually wear: one good layer over a light base, because the temperature halves after sunset.