Do you have fog in Namibia?

Yes, mostly along the coastline, on average about 310 nights per year, and often as far inland as 50km, sometimes up to 80km, and seldom up to 110km inland. Most vegetation in the Namib desert thrives on water condensed from the fog, as that area gets anything from 3 -15mm alongside the coast, and about 60mm 120km inland.
Seldom in winters we do get fog further inland due to adiabatic air, but this seldom stays for more than 4 hours maximum.