15-35m
    Medes Islands, Spain

    Cathédrale

    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 - Cathédrale 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 · max 15-35m
    StandoutRich in charismatic marine life

    Cathédrale. The name alone hints at something special, and this site in the Medes Islands absolutely delivers. We love the swim-through that starts around 20 metres. You enter through a narrow crack, and as your eyes adjust to the dim light, the space opens up dramatically. It’s not just a hole in the rock, it’s a genuine cavern, tall and wide, with light filtering down from cracks above, creating those namesake cathedral-like shafts. Look for the red snapping shrimp clicking away in the crevices – you’ll hear them before you see them. We’ve spotted broadnosed pipefish hugging the walls here too, blending in perfectly. The sponges, particularly the black leather sponges, are vibrant and plentiful inside, and outside, the walls are covered in colourful encrusting life. It’s a site that rewards a slow pace, letting your eyes adjust and really taking in the architecture of the place. Best dived on a calm day; strong surge can make the entry a bit challenging. This site is definitely for divers who appreciate dramatic underwater topography and don’t mind a bit of low light.

    Typical Cathédrale Dive Profile

    5m10m15mSafety Stop0m15m max~50 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

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

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

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

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    Conditions

    Ocean conditions, forecast and tides for Cathédrale

    Cathédrale Ocean Conditions

    Monthly averages for Cathédrale, 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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