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When to Go

Best Time to Visit Great Barrier Reef (Cairns)

Oceania · Month-by-month weather, seasons and what to do — from Noura's Destination Finder.

Noura's timing tip: Marine stinger (box jellyfish & Irukandji) season runs November-May - swim only in stinger suits or netted enclosures. The wet season (Dec-March) brings heavy rain, humidity and possible cyclones; the June-October dry season offers the best reef visibility.
Best months
Jun–Oct
Flights from the US
🟡 One connection
Great for
couples · families with kids · adult group · multi-gen
Seasons at a glance
JuneJulyAugustSeptemberOctober AprilMayNovemberDecember JanuaryFebruaryMarch

🟢 Peak season  ·  🟠 Shoulder  ·  ⚪ Off-peak

Great Barrier Reef (Cairns) month by month

Average temperatures, sunshine and the feel of each month. Getting the timing right is half of a great trip.

MonthAvg °FSunRainSeasonWhat it's like
January 75–89°F 7h Very High (385mm) Off-Peak Hot, steamy wet season; monsoon downpours, lush rainforest and warm reef waters.
February 75–89°F 6h Very High (480mm) Off-Peak Peak wet-season humidity; tropical storms, thundering waterfalls and empty reefs.
March 74–88°F 7h Very High (375mm) Off-Peak Warm and wet tapering off; green rainforest, swollen falls and quiet reef trips.
April 71–85°F 7h High (180mm) Shoulder Drying out and balmy; post-wet lushness meets clearing skies over the reef.
May 68–82°F 7h Moderate (80mm) Shoulder Fresh start to the dry; warm calm seas and the best reef visibility begins.
June 65–80°F 7h Low (45mm) Peak Cool, dry and clear; prime reef conditions and dwarf minke whale season starts.
July 63–79°F 8h Low (35mm) Peak Peak dry season; sunny days, calm water and minke whales on the outer reef.
August 63–81°F 8h Low (25mm) Peak Dry and gorgeous; the clearest water, warm days and cool comfortable nights.
September 66–84°F 9h Low (30mm) Peak Warm dry perfection; brilliant reef visibility and buzzing Cairns Amateurs week.
October 69–86°F 9h Moderate (65mm) Peak Warm calm seas; spring diving at its best before the stingers and heat return.
November 73–88°F 9h Moderate (85mm) Shoulder Heating up and humid; stinger season begins and coral spawns on the reef.
December 75–89°F 8h High (185mm) Shoulder Hot and building wet; steamy rainforest, warm seas and the first monsoon storms.

Data cross-referenced from climate and flight sources; conditions vary year to year.

Things to do in Great Barrier Reef (Cairns), month by month

Hand-picked ideas for every month of the year — from Noura's Destination Finder.

JanuaryOff-Peak75–89°F
  • Snorkel the outer reef on a stinger-suit tour
  • Daintree Rainforest & Mossman Gorge in the wet
  • Kuranda Scenic Railway through the rainforest
  • Cairns Esplanade Lagoon swim
  • Chase Atherton Tablelands waterfalls at full flow
FebruaryOff-Peak75–89°F
  • Dive Moore Reef in a full stinger wetsuit
  • Whitewater rafting the Tully River at peak flow
  • Skyrail Rainforest Cableway over the canopy
  • Daintree River cruise to spot crocodiles
  • Millaa Millaa Falls on the waterfall circuit
MarchOff-Peak74–88°F
  • Snorkel Green Island in a stinger suit
  • Cape Tribulation where rainforest meets reef
  • Kuranda village markets & butterfly sanctuary
  • Barron Falls thundering after the rains
  • Cairns Aquarium reef exhibits
AprilShoulder71–85°F
  • Reef trip to Michaelmas Cay for snorkeling
  • Daintree & Cape Tribulation 4WD tour
  • Atherton Tablelands waterfall circuit
  • Fitzroy Island day trip and rainforest hikes
  • Cairns Esplanade night markets
MayShoulder68–82°F
  • Snorkel and dive the outer Great Barrier Reef
  • Fitzroy Island snorkeling and Nudey Beach
  • Skyrail & Kuranda Scenic Railway loop
  • Walk the Daintree's Dubuji boardwalk
  • Sunset on the Cairns Esplanade
JunePeak65–80°F
  • Dwarf minke whale diving on the Ribbon Reefs
  • Outer reef snorkel at Agincourt Reef from Port Douglas
  • Daintree Rainforest & Mossman Gorge
  • Green Island reef and glass-bottom boat
  • Atherton Tablelands food & waterfalls tour
JulyPeak63–79°F
  • Swim with dwarf minke whales (season peak)
  • Liveaboard dive trip to the outer reef
  • Kuranda Scenic Railway & Skyrail
  • Port Douglas and Four Mile Beach
  • Cairns Esplanade Lagoon and night markets
AugustPeak63–81°F
  • Snorkel Moore & Milln Reef in clear winter water
  • Daintree River croc-spotting cruise
  • Fitzroy Island hikes and reef snorkel
  • Hot-air balloon over the Atherton Tablelands
  • Cape Tribulation rainforest and beach
SeptemberPeak66–84°F
  • Cairns Amateurs Racing Carnival
  • Outer reef diving at Flynn & Milln Reef
  • Cape Tribulation rainforest & beach
  • Green Island snorkeling day trip
  • Kuranda Skyrail rainforest cableway
OctoberPeak69–86°F
  • Snorkel the reef in warm, calm spring water
  • Reef Feast & seafood events around Port Douglas
  • Fitzroy Island and Nudey Beach
  • Atherton Tablelands waterfall circuit
  • Michaelmas Cay bird & reef tour
NovemberShoulder73–88°F
  • Snorkel the outer reef in a stinger suit
  • Coral spawning night dives on the reef
  • Daintree Rainforest & Mossman Gorge
  • Kuranda Scenic Railway
  • Palm Cove beach and spa day
DecemberShoulder75–89°F
  • Reef snorkel with stinger-suit protection
  • Cairns Esplanade Lagoon Christmas swim
  • Skyrail & Kuranda in the green season
  • Daintree waterfalls and rainforest walks
  • Atherton Tablelands lakes and falls
Where to go in June Where to go in July Where to go in August Where to go in September

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