The waters around Pemba Island are wonderfully warm year-round, making it an ideal diving destination.
• Average water temperature: typically ranges between 25°C and 29°C (77°F–84°F) throughout the year.
• Warmest months: January–April, when the sea is usually around 28–29°C (82–84°F).
• Cooler months: July–September, when currents bring slightly cooler water, averaging 25–26°C (77–79°F).

Because the water stays warm, most divers are comfortable in a 3 mm wetsuit or even just a shorty, though some prefer a 5 mm in the cooler season for longer dives. The consistently pleasant temperatures, combined with excellent visibility (often 20–40 meters), are part of what makes diving in Pemba so special.