Djerba Zarzis International Airport lies in the temperate mid-latitudes at 33.87° N, 10.78° E, on Africa/Tunis time (UTC+1).
Djerba Zarzis International Airport has 1 runway. The longest, 09/27, measures 10,171 ft by 148 ft, which puts the field in the long-haul capable category: widebodies operate comfortably, though the very longest sectors may need a payload trade. The surface is asphalt. It is lit for night operations.
Runway 09/27 is aligned roughly east/west, which is the clearest hint you get about the prevailing wind here: runways are built to face the wind that blows most often, because aircraft take off and land into it. Every runway here shares that east/west alignment, so a strong crosswind means a crosswind landing rather than a switch to another strip.
At 19 ft the field is effectively at sea level, which is the friendliest case for aircraft performance: maximum lift, maximum thrust and the shortest takeoff runs an aircraft is capable of.