Why the UAE pool calendar looks nothing like anywhere else's
In most countries a pool has an opening day and a closing day. In the UAE it never closes, but it does change character completely four or five times a year. From October to April the water sits between roughly 18 and 26 degrees, chemical demand is modest, and a weekly visit is usually enough. From May onwards the water climbs past 30 degrees, chlorine starts disappearing almost as fast as it goes in, and evaporation can pull several millimetres of water out of the pool every day.
Layered over that heat cycle are the shamal winds, which arrive mainly in early summer and again in winter, carrying fine Gulf dust that acts as a nutrient delivery service for algae. Then there is the social calendar: Ramadan compresses working hours, Eid empties villas for a week, and the December-to-February stretch is when everyone suddenly remembers they own a heater. A good maintenance plan anticipates all of this rather than reacting to it.