Visit Mozambique in the dry season, May–November, for the best diving—calmer seas and best visibility. For big pelagics, target October–March (whale sharks) and July–November (humpback whales).
Best time: For the clearest water, calmer seas and most reliable diving conditions across Mozambique, plan your trip in the dry season from May to November. During these months rainfall is low, visibility is generally best (often 15–30 m in top sites), and boat operations are less likely to be canceled. Water temperatures vary by region and season: expect 22–26°C in the south in winter (Jun–Aug) and 25–29°C in the north and in summer.
Regional notes and wildlife timing: northern Quirimbas and the Bazaruto Archipelago are excellent May–October for visibility and reef diving. The southern Inhambane coast (Tofo, Barra) sees big-pelagic action — whale sharks are most reliably encountered in the warmer months (roughly October–March, peak Nov–Feb), while migrating humpback whales pass from roughly July–November. Manta ray sightings are site-dependent and often peak in warmer months; check local dive operators for cleaning-station schedules.
Practical tips: avoid the cyclone-prone rainy season (December–March) for reliable diving, book reputable operators with conservation-minded practices, carry a 3–5 mm wetsuit (or 2 mm in the far north in summer), and factor in marine park fees/permits for Bazaruto and Quirimbas. Always check local seasonal patterns — they vary by coastline and year.