Martil Beach is generally safe for families and swimming, particularly during summer months when lifeguards are typically present along the main beach sections. The sandy bottom and moderate waves suit most swimmers, though conditions vary with weather and tides. The urban setting means the beach can become crowded, especially on weekends and holidays, so supervise children closely. Water quality can fluctuate; check local advisories during your visit. The promenade and family-friendly atmosphere make it popular with Moroccan families, indicating its general suitability for children.

Martil Beach is most pleasant from late May through September when warm, sunny weather creates ideal beach conditions. July and August see peak crowds and highest temperatures, perfect for swimming but busy. For better value and fewer tourists, consider June or September when weather remains excellent but accommodation prices drop. Spring and autumn offer milder temperatures suitable for beach walks but cooler water. Winter months can be chilly and wet, with many seasonal facilities closed. Weekdays are quieter than weekends when local families arrive.