Mohéli in December

April through November offers the best weather, with dry trade winds keeping temperatures comfortable around 25-27°C. This is also when diving conditions are at their best, with 30-meter visibility common. Turtle nesting season runs October through February, overlapping with the hot, humid season. If seeing nesting turtles is your priority, deal with the heat and occasional rain. Just pack light, breathable clothing. Whale watching peaks July through October when humpbacks migrate through Mohéli's waters. The whales come close to shore — sometimes within 100 meters of the beach. Avoid March if possible. This is cyclone season, and while direct hits are rare, rough seas can cancel flights and boat connections for days.