Blue Hole and Inland Sea
Location guideGozo

Blue Hole and Inland Sea

830 madvanced+geology○ Out of season

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Hotels, dive operators, gear, and how to get here are on the Gozo location page.

Overview

Limestone shaft on Gozo's western cliffs leading through an arch into open water at 18 m. Adjacent Inland Sea tunnel cuts through the cliff for 80 m of overhead environment. Both dives sit beside the now-collapsed Azure Window site.

What you'll see

3 species curated
  • Octopus
    year-round
  • Mediterranean moray
    year-round
  • Damselfish
    year-round

Sightings evidence

1 record on file
  • Octopus
    high confidence
    Last confirmed
    Oct 2025
    Recent records
    130 within 10 km
Sources & methodology

How we summarise this

We aggregate confirmed occurrence records from GBIF and OBIS within a fixed radius of each dive site. Occurrence records confirm presence and reveal seasonality clustering, but they DO NOT measure per-dive probability — there is no eligible-effort denominator. We deliberately do not publish a numeric '% chance of sighting' from this data.

Sources

Conditions

MonthWaterVisibilityCurrent
Jan1416 °C2030 mmild
Feb1415 °C2030 mmild
Mar1416 °C2030 mmild
Apr1517 °C2030 mmild
May1719 °C2030 mmild
Jun2022 °C2535 mmild
Jul2325 °C2535 mmild
Aug2527 °C2535 mmild
Sep2426 °C2535 mmild
Oct2224 °C2535 mmild
Nov1921 °C2030 mmild
Dec1618 °C2030 mmild

Season calendar

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Peak season highlighted · current month outlined

Gear for this site

Beyond the basic kit
  • 5mm wetsuitMediterranean water cold half the year — 14-19C is the norm outside high summer.
  • Dive lightInland Sea tunnel is a true overhead environment.

Next step

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