Temperatures in coastal areas could hit 38°C while inland might reach as high as 40°C.
But both Dubai and Abu Dhabi are forecast to see 40°C with partly cloudy skies.
Humidity along the coast is forecast to reach 90 per cent while the interior could be at 85 per cent.
In the mountains, it will top out at 33°C with 65 per cent humidity.
The National Centre of Meteorology said Friday will be fair to partly cloudy at times. Some clouds will appear eastward and westward could become convective by afternoon, with a decrease in temperature.
The light to moderate winds will freshen at times over the sea.
The sea will be moderate, becoming rough at times westward in the Arabian Gulf and slight to moderate in the Oman Sea.
The humidity into Friday night and Saturday morning brings a probability of fog or mist formation over some coastal and internal areas, especially Northward.
