Rottnest Island (Wadjemup) lies 10–12 nautical miles off the coast of Fremantle and is Western Australia’s most popular cruising destination.
Known for its brilliant turquoise water, white sandy beaches and Quokkas, the island offers dozens of bays suitable for day trips and longer stays.
Conditions vary greatly depending on wind direction, but with both a sheltered north side and a protected south-east corner, Rottnest usually offers a comfortable anchorage somewhere — even during the strong afternoon sea breeze.
Approaches
From Fremantle
- Distance: ~10–12 NM depending on departure point
- Expect strong south-westerly sea breezes in summer (the Fremantle Doctor), typically 15–25 knots in the afternoon.
- Keep clear of:
- Shipping lanes into Fremantle Port
- High-speed ferries crossing between Fremantle, Hillarys and Rottnest
Weather Considerations
- Summer: SW sea breeze dominates. Best shelter is the north side (Thomson Bay, Geordie Bay, Longreach Bay, Parakeet Bay) or south east Porpoise Bay / Parker Point.
- Winter: More variable — occasional northerly systems mean southern and eastern bays can provide excellent protection.
- Swell: Western side is heavily exposed; only suitable for brief visits in very calm weather.
General rule:
✔ Strong SW = anchor on the north side
✔ Northerly winds = anchor on the south/east (Porpoise, Parker, Salmon Bay)
✖ Avoid the west side except in calm conditions.
Hazards & Navigation Notes
- Reef is everywhere. Rottnest is surrounded by limestone reef platforms and bommies — a sharp lookout is essential.
- Marine sanctuary zones:
- Rottnest mooring rules:
- Most moorings require a booking via the Rottnest Island Authority
- A limited set of casual moorings are available
- Ferries: High-speed ferries operate at 25–40 knots; keep clear.
Facilities
On the island (Thomson Bay)
- Fuel jetty
- Food & cafes
- Pub
- Small supermarket
- Bike hire
- Public toilets and showers
Suggested Cruising Itineraries
1–Day Trip (Fremantle → North Side)
- Depart Fremantle in the morning before the sea breeze rises
- Anchor or pick up a mooring at Geordie Bay or Longreach
- Swim, SUP and lunch aboard
- Return on a fast reach with the SW breeze
Weekend Trip
- Day 1: Anchor Thomson Bay
- Day 2: North side — Geordie / Longreach / Parakeet
Photography / Snorkeling Focus
- Parker Point
- Little Salmon Bay
- Porpoise Bay
- Armstrong Bay
Best Time of Year
- Summer: Best for predictable winds, swimming, snorkeling
- Autumn: Often the clearest water of the year
- Winter: Calm spells between fronts create magic conditions on both sides
- Spring: Unpredictable but can be spectacular
