Chukar confirmed 24 days ago

Cape Kolumbo

Santorini · Greece

Kolumbo is a submerged active volcanic crater 7 km northeast of Santorini, accessible by boat and descended to 18 to 35 m for sport diving. The crater rim hosts hydrothermal vent fields with hydrogen sulphide chimneys, chemosynthetic bacterial mats, and species found nowhere else in the Aegean. Water stratification creates visible density haloclines at around 20 m. This is one of the most scientifically distinctive dive sites in the entire Mediterranean; the advanced skill rating reflects boat exposure, occasional thermocline disorientation, and limited rescue logistics at the outer site.

Conditions

Depth

15 to 35 m

Advanced depths

Current

Can be moderate

Can pick up on the edge

Visibility

15 to 25 m

Clearest in the calm season

Water

14 to 27°C

3 mm wetsuit

Month by month

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Water (°C)	15	14	14	15	18	21	23	24	23	21	18	16
Vis (m)	10	10	10	15	15	15	15	15	15	10	10	10
Current	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate