Medes Islands, Spain

    Tunnel de planne

    Best months: Jun–Sep

    Why dive here

    With 77+ marine species recorded in the area - including blue sharks, dolphins, ocean sunfish (mola mola), octopuses and sea turtles - Tunnel de planne offers some of Medes Islands's richest cave diving. Water ranges 14-24°C, warmest July, August, September.

    Best timeJun–Sep
    WetsuitA 3mm full wetsuit
    Marine lifeBlue Sharks, Dolphins, Ocean Sunfish (Mola Mola), Octopuses and Sea Turtles · 77+ species recorded
    Water14-24°C · warmest July, August, September
    CharacterCave dive
    StandoutRich in charismatic marine life

    The Medes Islands always deliver, and Tunnel de Planne is one of those dives that sticks with you. It’s an easy entry, dropping down into the first section where the light still plays on the walls. We’ve found the best approach is to take your time, letting your eyes adjust as you move further in. The real magic happens once you’re fully inside; it’s a properly atmospheric dive. Keep an eye out for dusky groupers hanging in the shadows – they’re fairly bold here. We’ve often seen big schools of salema swirling at the tunnel’s opening, catching the light as they move. It’s a genuinely peaceful dive, the kind where you can really slow your breathing and just absorb the quiet. The red mullets often cruise the sandy patches just outside, and on a good day, the moonfish might put on a show in the bluer water. We’d suggest going early to avoid the crowds, as it’s a popular spot for a reason. Definitely a standout for its unique character.

    Safety Notes

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

    Today05:4817:0411h 17m daylightGolden hour 16:26

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    Conditions

    Ocean conditions, forecast and tides for Tunnel de planne

    Tunnel de planne Ocean Conditions

    Monthly averages for Tunnel de planne, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (43.2, 5.22) (37km away)

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    October Averages

    Sea Temperature

    20°C

    69°F · Range: 17.4–22.8°C

    Current Speed

    9.85 cm/s

    Direction: SW (246°)

    Chlorophyll-a

    0.182 mg/m³

    Clear water

    Salinity

    38.21 PSU

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

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