Quirimbas Archipelago, Mozambique

    Neptune's Arm

    Best months: Jun–Sep

    Why dive here

    With 309+ marine species recorded in the area - including barracuda, blue-spotted stingrays, oceanic whitetip sharks, sea turtles and sperm whales - Neptune's Arm offers some of Quirimbas Archipelago's richest cave diving. Water ranges 26-30°C, warmest February, March, December.

    Best timeJun–Sep
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Blue-Spotted Stingrays, Oceanic Whitetip Sharks, Sea Turtles and Sperm Whales · 309+ species recorded
    Water26-30°C · warmest February, March, December
    CharacterCave dive
    StandoutExceptional marine biodiversity

    There’s a reason Neptune’s Arm keeps coming up in conversations about Mozambique diving. It's not just a healthy reef; it’s a sprawling, vibrant city of coral. We’re talking about vast fields of hard corals here, specifically the branching staghorn and the massive potato groupers that hover amongst them. Dive over a bommie and you might catch the flash of a Napoleon wrasse gliding by. We love the feeling of just drifting, watching the intricate patterns of the honeycomb corals and the subtle glow of fluorescence grass coral. Visibility is generally excellent, making it easy to spot the argus groupers lurking in the shadows. This spot suits divers who appreciate truly healthy coral ecosystems and aren’t afraid of a bit of remote travel for the reward. Dive this site mid-morning; the light plays beautifully through the water, illuminating the coral gardens.

    Safety Notes

    Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.

    Today05:5618:1412h 18m daylightGolden hour 17:46

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    Conditions

    Ocean conditions, forecast and tides for Neptune's Arm

    Neptune's Arm Ocean Conditions

    Monthly averages for Neptune's Arm, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (-11.02, 40.68) (43km away)

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    October Averages

    Sea Temperature

    28°C

    82°F · Range: 26.1–28.9°C

    Air Temperature

    26°C

    78°F

    Wind Speed

    7.15 m/s

    13.9 knots

    Atmospheric Pressure

    1014.5 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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