Cairns · Month comparison

July vs June

July ranks #1 overall vs June at #2. Peak season — the best reef conditions of the year with Australian and international visitors at maximum

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
Great Barrier Reef aerial with turquoise water in winter dry season

June

#2 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
FactorJulyJune
Weather score
10
9
Value score
4
5
Crowd score
9
7
Events score
6
6
Atmosphere
9
9
Avg high temp25°C26°C
Monthly rain23mm40mm
Daily sunshine11hrs10.5hrs

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

June trade-offs

  • ↓Southern holiday makers beginning to arrive; accommodation prices in peak range
  • ↓Most popular liveaboard routes need booking 2–3 months ahead
See all 12 months for Cairns →July in detail →June in detail →
Scores compare months within Cairns. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →