Mornington Peninsula · Victoria
Blairgowrie Pier
Victoria's most popular pier dive, and the best-known site for giant spider crab aggregations.
Blairgowrie Pier is the most-dived pier in Victoria, with easy ladder access, shallow depth and an extraordinary density of small life among the piles and the surrounding seagrass.
It is best known internationally for the giant spider crab aggregation, when tens of thousands of crabs gather in the shallows to moult.
The marina setting means boat traffic is a genuine consideration, and divers must stay within the designated areas.
Max depth
7 m
typically 5 m
Access
shore
Current
tide-dependent
tide sensitive
Water temp
11–20°C
Level
beginner
| Region | Mornington Peninsula |
|---|---|
| State | Victoria |
| Access | shore |
| Site type | pier, muck |
| Minimum depth | 2 m |
| Typical depth | 5 m |
| Maximum depth | 7 m |
| Current | tide-dependent |
| Tide sensitive | Yes |
| Visibility | Commonly 3–15 m |
| Water temperature | Roughly 11–20°C |
| Experience level | beginner |
These are guidance categories, not guarantees. Conditions on the day, and an operator’s own requirements, override any classification here.
- giant spider crabs seasonally
- weedy seadragons
- seahorses
- octopus
- southern calamari
- smooth rays
- nudibranchs
- pufferfish
Seasonality
- Giant spider crab aggregations typically occur around late autumn and early winter.
Access
- Ladder entry from the pier.
- Marina environment — designated dive areas apply.
- Very shallow throughout.
Hazards
- boat traffic in the marina
- fishing line
- silt-out in the seagrass
- low light beneath the structure
What you might see here
Species documented at this site, with seasonality and etiquette on each page.
We have not yet established which businesses regularly service this site. Start with Mornington Peninsula dive centres.
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.
Dive sites nearby
Other documented sites within range, nearest first — useful for building a trip rather than a single dive.
Other dive businesses in the area
Not documented as servicing this site, but close enough to be useful for fills, hire or advice.
Frequently asked questions
How deep is Blairgowrie Pier?
Depths range from around 2 metres to roughly 7 metres, with a typical profile around 5 metres. Conditions and route selection change this considerably.
Is Blairgowrie Pier suitable for beginners?
It can be, in reasonable conditions and with appropriate supervision. Conditions on the day matter more than certification level, and operators may impose their own requirements.
How do you get to Blairgowrie Pier?
Access is shore based. Ladder entry from the pier.
Is there current at Blairgowrie Pier?
Current is recorded as tide-dependent. The site is tide sensitive, so timing matters and local knowledge is worth paying for. Conditions vary daily and should be checked close to the day.
What will I see at Blairgowrie Pier?
Commonly reported marine life includes giant spider crabs seasonally, weedy seadragons, seahorses, octopus, southern calamari, smooth rays. Sightings are never guaranteed, and several species here are strongly seasonal.
When is the best time to dive Blairgowrie Pier?
Giant spider crab aggregations typically occur around late autumn and early winter. There is rarely a single best month — the right time depends on what you want to see.
Where is Blairgowrie Pier?
Blairgowrie Pier is in the Mornington Peninsula region of Victoria.
Last researched: September 2026. Dive businesses change frequently — confirm current services, prices and requirements directly with the operator before booking.