Cairns · Month comparison

June vs July

July ranks #1 overall vs June at #4. Peak season — the best reef conditions of the year with Australian and international visitors at maximum

Great Barrier Reef aerial with turquoise water in winter dry season

June

#4 of 12 months

Best match

Peak season begins — world-class reef conditions and the best time to see the humpback whale migration

  • ↑Humpback whale migration beginning in the Coral Sea; whale watching tours from June
  • ↑Perfect diving conditions: warm 26°C water, exceptional visibility, low seas
Great Barrier Reef Outer Reef in peak July conditions with coral and fish

July

#1 of 12 months

Best match

Peak season — the best reef conditions of the year with Australian and international visitors at maximum

  • ↑The most reliably excellent conditions: clear skies, flat seas and 30m+ reef visibility
  • ↑Dwarf minke whale encounters (June-July only) unique to the northern Great Barrier Reef
FactorJuneJuly
Weather score
9
9
Value score
5
4
Crowd score
6
8
Events score
5
5
Atmosphere
8
8
Avg high temp26°C25°C
Monthly rain40mm23mm
Daily sunshine10.5hrs11hrs

June trade-offs

  • ↓Southern holiday makers beginning to arrive; accommodation prices in peak range
  • ↓Most popular liveaboard routes need booking 2–3 months ahead

July trade-offs

  • ↓Maximum crowds; popular reef pontoons at Agincourt can have 200+ visitors simultaneously
  • ↓July school holiday peak: every liveaboard and dive operator fully booked, prices at maximum
See all 12 months for Cairns →June in detail →July in detail →
Scores compare months within Cairns. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →