March turns the corner into spring. Daytime highs nudge up to around 19°C, the wet winter pattern fades, and sunny days outnumber grey ones. The Atlantic keeps the air fresh and breezy rather than warm, but the Corniche walks and the seafront esplanade of the Hassan II Mosque become genuinely pleasant again. The city is still quiet and good value, sitting in the gap before the warmer months bring more visitors.
It is a comfortable month to combine indoor culture with outdoor air. A morning tour inside the mosque, an afternoon along the renovated Corniche, and an evening among the Art Deco façades and cafés of the centre-ville make an easy, balanced day. The Habous quarter and the central market reward a slower pace, and the milder weather makes the city's long seafront the obvious place to be when the sun is out.
March also works neatly as part of a wider spring loop. Rabat is an hour up the coast, the imperial cities are at their best, and Casablanca makes a logical arrival or departure point given its major airport and rail links. For travellers who want the city's business-and-culture character with reliably improving weather, March is a quietly rewarding choice.