Egypt's state news agency MENA quotes the General Authority for Red Sea Ports as saying visibility in the area was reduced to less than 1,500 metres this morning.
MENA reports that the ports specialise in transporting containers, goods, oils, petroleum products and passengers.
The unseasonal sandstorm has swept across the Mideast, blanketing Beirut, Cairo and Damascus and causing the deaths of at least five people and sending hundreds of others to hospitals with breathing problems.