Pattaya sits in the tropics with UV regularly hitting 10+ (Mar-May). That means skin burn in 10 minutes. Tourists from temperate climates face daily heatstroke risk. Data below is live from OpenMeteo.
Sun protection tips
+Sunscreen SPF 50+, reapply every 2 hours or after swim/sweat
+Drink 3 liters/day, add electrolytes if outdoors > 2 hours
+Peak sun: noon to 3pm — stay in shade if possible
+Kids and elderly are 4× more vulnerable — hat, long-sleeve UV shirt