Bicheno · Tasmania
Governor Island Marine Reserve
Granite walls and sponge gardens of unusual density and colour, protected since 1991.
Governor Island Marine Reserve sits immediately offshore from Bicheno and has been protected since 1991, which shows in the density of life on its granite terrain.
The combination of protection, current-swept granite and cool nutrient-rich water produces sponge gardens of unusual density and colour — the site photographs far more vividly than most people expect from cold water.
Sites include walls, swim-throughs and the well-known Golden Bommies.
Max depth
35 m
typically 18 m
Access
boat
Current
variable
Water temp
12–18°C
Level
advanced
| Region | Bicheno |
|---|---|
| State | Tasmania |
| Access | boat |
| Site type | wall, reef, island |
| Minimum depth | 5 m |
| Typical depth | 18 m |
| Maximum depth | 35 m |
| Current | variable |
| Visibility | Often 10–25 m |
| Water temperature | Roughly 12–18°C |
| Experience level | intermediate, advanced |
These are guidance categories, not guarantees. Conditions on the day, and an operator’s own requirements, override any classification here.
- dense sponge gardens and soft coral
- butterfly perch
- crayfish
- temperate reef fish
- seals occasionally
- sea whips
Access
- Boat access from Bicheno — a very short transit.
- Marine reserve; no collection.
- More sheltered than the Tasman Peninsula in many conditions.
Hazards
- surge
- cold water
- current
- depth on the deeper walls
What you might see here
Species documented at this site, with seasonality and etiquette on each page.
Operators servicing this site
Businesses documented as regularly diving this site. Only operators we have established a connection for are listed.
Training that is genuinely useful here
Not a list of everything available — the qualifications that actually change what you can do at this site.
Related dive sites
Worth reading alongside this one.
Frequently asked questions
How deep is Governor Island Marine Reserve?
Depths range from around 5 metres to roughly 35 metres, with a typical profile around 18 metres. Conditions and route selection change this considerably.
Is Governor Island Marine Reserve suitable for beginners?
It is better approached with experience beyond entry level. Better suited to divers with some experience beyond entry level, particularly in the local conditions. Discuss your recent diving honestly with the operator rather than relying on certification alone.
How do you get to Governor Island Marine Reserve?
Access is boat based. Boat access from Bicheno — a very short transit.
Is there current at Governor Island Marine Reserve?
Current is recorded as variable. Conditions vary daily and should be checked close to the day.
What will I see at Governor Island Marine Reserve?
Commonly reported marine life includes dense sponge gardens and soft coral, butterfly perch, crayfish, temperate reef fish, seals occasionally, sea whips. Sightings are never guaranteed.
When is the best time to dive Governor Island Marine Reserve?
Conditions vary through the year. Visibility is often 10–25 m. Check with local operators close to your dates.
Where is Governor Island Marine Reserve?
Governor Island Marine Reserve is in the Bicheno region of Tasmania.
Last researched: September 2026. Dive businesses change frequently — confirm current services, prices and requirements directly with the operator before booking.