Some say jokingly that there are two seasons in the UAE: the hot season and the very hot season. This is somewhat true.
There is no really significant difference in the climate depending on your location within the UAE, due to the relatively small size of the country. All major cities, excepted Al Ain, are on the coast and therefore share the same climate. You will find the same climate in Abu Dhabi, in Dubai, or in the Northern Emirates.
Inland, meaning in the desert, the climate can vary slightly: the nights are cooler in winter and the air is slightly less humid in summer.
Despite that, what you find in the rest of this article applies quite well to the whole UAE, no matter where you are.
The plesant season: winter in the UAE
The pleasant season extends approximately from October to April. Indeed, this period of the year is really nice; the weather is mild without being too hot, and this is probably the best time to visit the UAE.
However, temperatures can drop down to 12 ° C in the morning, in the heart of winter. It is amusing to see the locals wearing warm coats and hats when the temperature approaches 10 ° C. There are some records that are approaching 5 ° C, especially in the desert at night.
Having said that, on average, temperature is around 27 to 28 ° C in the hottest hours of the day, and around 17 ° C 18 ° C in the morning.
It is also during this season that you're the most likely to have rain. However, it does not generally rain more than 10 days throughout the year in the UAE. Nothing scary, then.
During the winter, some heavy fog may hit the country, especially in the morning, sometimes causing major traffic problems.
The less pleasant season: summer in the UAE
In summer, temperatures rise very high in the UAE, making life difficult. It is almost impossible to get out during the day. Even at night, temperature and humidity in the air don't drop that much. The outdoor activities are to be forgotten during this period, which extends generally from June to September.
A small glance at the thermometer will inform you that the temperature goes over 40 ° C almost every day, and does not drop below 30 ° C, even in the early morning. There is even records that approaches the 55 ° C.
The humidity is very high, varying up to 90% and saturating the air in salt water that comes directly from the evaporation of the sea. That makes a quite suffocating atmosphere, prompting residents to remain in the air-conditioned buildings.
Regarding rain, you have absolutely no chance to see any drop of rain during this period.
Temperature of the sea in the UAE
The temperature of the seawater in the UAE obviously depends on the temperature of the air.
In winter, the sea is relatively cold: around 20 ° C in the Persian Gulf (in Abu Dhabi and Dubai) and a little cooler on the coast of the Indian Ocean and Arabian Sea, to 16 ° C or 18 ° C for the coldest days. Anyway, it is still very reasonable to go swimming during winter.
In summer, water reaches temperatures that one will imagine unthinkable. In the Persian Gulf, the sea rises to 38 ° C, making it a real soup: hot and very salty, it is very unpleasant to swim. In the emirate of Fujairah, which overlooks the Indian Ocean, the water temperature is a bit more acceptable, since it rarely exceeds 32 to 33 ° C.
Most swimming-pools are refreshed during summer, in order to stay at a reasonable temperature.