31m
    Alonissos Marine Park, Greece
    ANDROS: KENTRIKO KAI NOTIO TMIMA, GYRO NISIDES KAI PARAKTIA THALASSIA ZONI

    MASTROPETROS

    Best months: Jul–Sep

    Protected Area

    ANDROS: KENTRIKO KAI NOTIO TMIMA, GYRO NISIDES KAI PARAKTIA THALASSIA ZONI

    Why dive here

    MASTROPETROS is a wreck dive where divers can encounter dolphins and sea turtles. Water ranges 15-26°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeDolphins and Sea Turtles
    Water15-26°C · warmest July, August, September
    CharacterWreck dive · max 31m

    Mastropetros is one of our favourite deep wrecks in Alonissos, a carrier vessel that went down in 1999. She rests upright, surprisingly intact for her age, with her stern sitting at about 31 metres. It’s a proper dive, certainly for experienced wreck divers comfortable with depth and perhaps a little current, though it’s often quite calm. We love Mastropetros because it still feels like a ship, not just a pile of metal. You can swim along her main deck, seeing the structure of the cargo holds, now open to the sea. The bridge superstructure is still there, a ghostly outline, and we’ve even peeked into what would have been the crew quarters. It’s not just about the history though. The wreck has become a home for all sorts of things. Schools of damselfish shimmer in and out of the shadows, and we've spotted large groupers lurking under ledges. Keep an eye out for moray eels tucked away in any crevice you can find. The visibility here is usually excellent, giving you a proper sense of the wreck’s scale as you descend. Go early if you can; you'll have her all to yourself.

    Typical MASTROPETROS Dive Profile

    15m30mSafety Stop0m31m max~20 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Safety Notes

    Deep dive (31m) - monitor air consumption closely. Advanced certification recommended.

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today06:2617:5111h 25m daylightGolden hour 17:16

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    Conditions

    Ocean conditions, forecast and tides for MASTROPETROS

    MASTROPETROS Ocean Conditions

    Monthly averages for MASTROPETROS, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (38.09, 24.15) (15km away)

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    October Averages

    Sea Temperature

    23°C

    73°F · Range: 21–25.6°C

    Current Speed

    1.41 cm/s

    Direction: SW (225°)

    Chlorophyll-a

    0.13 mg/m³

    Clear water

    Salinity

    34.63 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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