The best time to visit Souk El Arbaa is during spring (April to June) and autumn (September to November).
These seasons offer pleasant weather with comfortable temperatures, making it ideal for exploring the town and its surroundings without the intense heat of summer or the cooler, wetter days of winter. You'll find it more enjoyable for walking through the souks and experiencing the local life.
For those looking to avoid larger crowds and potentially secure better rates on accommodation, visiting just outside the peak spring and autumn windows, such as early April or late October, can be a good option.