January is the middle of the Moroccan season. North Atlantic depressions send long-period trains, 2.2 m at 12.5 seconds, and the period is what matters: at the same height, a 12-second swell wakes up points that a summer swell leaves flat. The wind is workable seventeen days out of thirty, the best figure of the year alongside February.
What that reliability costs is everybody else. Crowds and prices are both at their peak, and camps want six to eight weeks' notice. It rains on three days for 32 mm, which is not much, and the sun gives 7.6 hours a day, among the lowest of the year.
The water sits at 18 °C: a 3/2 mm suits most people, a 4/3 mm makes the long sessions comfortable. Air reaches 21 °C in the afternoon, which means changing out of a wetsuit is not the ordeal the water temperature suggests.

