What to wear to Reggae Sumfest: Montego Bay sits at 32°C (90°F) by day and 26°C (79°F) at night in July, on beach, with a moderate chance of rain. That means loose natural fabrics and real sun protection, flat sandals you can rinse, with trainers for the night stages, and a bag small enough for the gate rules. The crowd leans reggae, dancehall and tropical, so anything that survives the day reads as right.
Men's festival dressing at Reggae Sumfest comes down to three decisions: how much you can take off when it hits 32°C (90°F), what you put back on at 26°C (79°F), and whether your shoes can take beach for 6 days.
The dominant aesthetics at Reggae Sumfest are reggae, dancehall, tropical and beachwear. 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: swimwear as a base layer, a sarong or shirt over it, and shoes that can be rinsed.