Weather conditions for Dubai and Abu Dhabi on Saturday will nudge 40°C on Saturday.
It will be accompanied by light winds and no precipitation is expected.
Evening temperatures are likely to dip to about 30s.
Elsewhere, along the coast and islands could reach as high as 44°C.
The National Centre of Meteorology forecasts dusty light to moderate winds causing blowing dust and sand.
It will a humid night and Sunday morning brings the chance of fog or mist formation over some coastal and internal areas especially northwards.
Saturday could see humidity as high as 95 per cent along the coast and up to 80 per cent in country.
The sea will be moderate to rough especially westward in the Arabian Gulf and slight to moderate in Oman Sea.
