Fleurieu Peninsula

The Fleurieu Peninsula south of Adelaide is South Australia’s most accessible leafy-seadragon circuit. Rapid Bay’s old jetty structure is the principal search site, with Second Valley, Port Noarlunga and the ex-HMAS Hobart adding different shore and boat profiles.

Best time
Nov–Apr
Certification
Open water
Budget
$ · under $2,000
Trip length
2–5 days
Trip style
Land based, Day trip, Shore dive
Access
Easy

The short version

Known forLeafy seadragon habitat at Rapid Bay.

Main tradeoffLeafy seadragons are difficult to find and numbers fluctuate.

Fleurieu Peninsula dive region

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Your outlook

Explore 4 dive sites

Browse the map and wildlife below, or add an optional preference to narrow Fleurieu Peninsula.

Most relevant wildlife

  • Leafy seadragonJan–Dec
  • Common dolphinJan–Dec
  • Giant Australian cuttlefishJan–Dec
  • Weedy seadragonJan–Dec

Plan the trip

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4 sites shown.

Conditions referenceSeason, water and visibilityBest Nov–Apr · Mild current · 14–22°C (coldest Jul, warmest Jan)
Best months Operating
Current
Mild
Water temperature
14–22°C (coldest Jul, warmest Jan)
Visibility
5–20m: Wind, tide and jetty sediment control visibility.
Experience
Port Noarlunga and calm Rapid Bay days suit Open Water divers.

01 · Marine life

What you may see

rareoccasionalcommonly seenpeak seasondestination closed

Sightings are never guaranteed. The bars show typical likelihood by month.

Leafy seadragonPhycodurus eques
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Resident habitat association; individual sightings are never guaranteed.

Common dolphinDelphinus delphis
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Possible year-round; no unsupported peak is applied.

Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Possible year-round; no unsupported peak is applied.

Weedy seadragonPhyllopteryx taeniolatus
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Resident habitat association; individual sightings are never guaranteed.

See all 8 species

02 · Dive sites

Dive sites worth knowing

A starting point, not a ranking. Conditions decide what works on the day.

See all 4 dive sites
03 · LogisticsGetting there and costsEasy. Fly to ADL. Typical trip $.

Route overview

Easy

Day trips from a coastal base, about 1.5h from the airport.

Airport options

ADL

Adelaide Airport

About 60–100 minutes by road depending on the selected site

Typical trip cost

$

under $2,000

Per person, excluding international flights.

  • Shore diving is low-cost with personal equipment; guided seadragon searches and Hobart boat dives add substantially.

Sources & last checked

Checked September 2026

Research is source-backed, but conditions and fees should still be confirmed locally.

View 3 sources and checking notes

Note on the data: Seadragon seasonality is kept flat because monitoring supports residency but not dependable monthly odds. Water temperature: Rounded Gulf St Vincent planning bands. Access: A rental car is the practical link between Adelaide and dispersed shore sites.