April is when the coast becomes workable for everyone. The swell falls to 1.4 m and the period to 11 seconds: still groundswell, but no longer the kind that closes out a sandbar. Wind is workable fifteen days out of thirty, against seventeen in winter.
It is also when the weather turns for good: 9.1 hours of sun a day, two rainy days, 13.8 mm. A third of March's rain. Air holds 23 °C and water 18 °C, which is the least intuitive combination of the Moroccan spring: the weather is summer and the sea is still winter.
Crowds and prices stay medium, without the Easter spike in years when Easter lands here.

