When To Go · Destination Guide
South West Rocks Australia
Shark and cave diving at Fish Rock, with national parks on your doorstep
Updated Jan 23, 2026 • 16 sources
When To Go
Season planner for South West Rocks
South West Rocks is a year-round destination, but conditions swing with swell, rain, and the East Australian Current. Water temperatures commonly range from 18°C in the cooler season to around 26°C in summer. For shark-heavy scuba, local operators often report the best grey nurse numbers from May through December, with peak winter concentrations. Topside, winter brings whale migration viewpoints, while spring and autumn balance mild hiking weather with workable ocean windows.
At A Glance Heatmap
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall | ||||||||||||
| Scuba | ||||||||||||
| Freedive | ||||||||||||
| Snorkel | ||||||||||||
| Topside |
Activity Drilldowns
OverallMay to November·Crowd:Moderate·Cost:Moderate
Ideal: Milder air, more consistent diving schedules, and peak wildlife watching. Cooler water 18°C to 22°C.
Plan Carefully: Warmest water 24°C to 26°C, but higher chance of rain and stormy surf. Build buffer days.
March is commonly one of the wettest months locally, while September is often drier.
ScubaMay to December·Crowd:High·Cost:Moderate
Ideal: Cooler water 18°C to 22°C, peak grey nurse numbers, and strong chances of whale sightings between dives.
Plan Carefully: Warmest water 24°C to 26°C and occasional very clear days, but currents and weather systems can cancel charters. Grey nurse numbers may dip Feb to Apr.
If Fish Rock Cave is your priority, plan a multiday window so weather cancellations do not end the trip.
FreediveOctober to April·Crowd:Low·Cost:Moderate
Ideal: Warmer water 22°C to 26°C for longer sessions. Pick light-wind days under 20.0 kph for easier surface management.
Plan Carefully: Coolest water 18°C to 21°C with more frequent swell. Favor sheltered training or boat days only in settled weather.
Freediving offshore requires boat support and conservative safety protocols.
SnorkelDecember to March·Crowd:High·Cost:Premium
Ideal: Warm water 24°C to 26°C for comfortable swims. Choose low-swell mornings for best visibility.
Plan Carefully: Cooler water 18°C to 22°C and more swell. Stick to sheltered bays and avoid exposed rock entries.
Snorkeling quality depends heavily on swell direction.
TopsideMarch to May & September to November·Crowd:High·Cost:Premium
Ideal: Comfortable hiking weather and longer days. Expect breezes on headlands; pack a wind layer.
Plan Carefully: Hotter days and peak holiday crowds. Book accommodation early and plan early-morning walks to avoid midday heat.
Winter is a strong nondiving season because whale watching is reliable and walking tracks are less humid than summer.
Seasonal Callouts Timeline
Grey nurse shark peak numbers
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecFish Rock is a well-known grey nurse shark location. Local operators often report the greatest numbers from May to December, with peak concentrations in the cooler months.
Hammerhead season
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecSchools of hammerhead sharks are most commonly reported from October to January around Fish Rock, especially on deeper, current-influenced sites.
Humpback whale migration
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecWhales migrate along the NSW coast from late autumn through spring. Lookouts around Smoky Cape and Hat Head are strong land-based viewing options, and you may also see whales between dive sites.
Leopard sharks in warmer months
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecWhen grey nurse numbers can be lower in late summer, operators often note increased sightings of leopard sharks (zebra sharks) around Fish Rock.
Sculpture in the Gaol
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecTrial Bay hosts an annual Sculpture in the Gaol event during August and September, adding an easy topside anchor to a winter dive trip.
Spring wildflowers and birdlife
JanJanFebFebMarMarAprAprMayMayJunJunJulJulAugAugSepSepOctOctNovNovDecDecSpring brings wildflower displays in nearby national parks and better conditions for coastal walks between dive days.