Ojamo Mine

Best time to dive

Season varies - confirm locally

Certification & difficulty

Technical - advanced conditions (currents/depth); dive within your training.

Snorkelling

Not a snorkel site - No meaningful snorkeling - it's a deep flooded mine/quarry, not a viable snorkel destination; the open pit surface could technically be swum but offers little to see, especially given summer murk

Safety notes

Extreme cold (constant 4°C) demanding dry gloves/heated vests; silt-outs in unexplored tunnel sections; disorientation risk in large halls with few visual references; long decompression obligations on deep dives; at least one fatal diving accident has been reported at this site historically - it is an unforgiving overhead-environment technical site

Permits & fees

Site access is coordinated through the local mine-diving community/club (Ojamon Kaivossukeltajat ry) and the Ojamo Dive portal (ojamodive.fi); specific fee/permit terms were not confirmed from available sources - treat as VERIFY and check directly with the club before visiting

Permits and operators change - confirm before booking.

Location

Nearest hub: Lohja