Finland
Main Tunnel
About this Dive Site
Description
Dive into the iconic Main Tunnel of Ojamo Mine, a popular entry point offering a straightforward descent into Finland's submerged past. Marvel at the impressive mine architecture, including the awe-inspiring 'Cathedral' chamber and the colossal 'Big Bertha' mining machine, remnants of a bygone industrial era.
Best Time to Dive
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 5°C | 5°C | 5°C | 5°C | 5°C | 5°C | 5°C | 5°C | 5°C | 5°C | 5°C | 5°C |
Peak Season
January, February, March, April, May, June, July, August, September, October, November, December
Jan
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Feb
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Mar
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Apr
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
More monthly highlights
May
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Jun
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Jul
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Aug
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Sep
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Oct
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Nov
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
Dec
Stable, clear water year-round. Excellent for technical diving and exploring mine shafts.
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