Australia
Great Barrier Reef in September
☀️ Dry seasonPleasant, a little humid and mostly dry.
🎒 Pack: sunglasses & hat
Why September scores 9.4What goes into the score
How it works- Weather comfort9.3
- ✓Comfortable temperatures (24.2°C highs / 23.5°C lows)
- !Humid (dew point 19.2°C)
- ✓Mostly dry (~7 mm rain)
- Air quality9.4
- ✓Good (within WHO guideline) (PM2.5 ~9 µg/m³)
- Seasonal hazards10.0
- ·No notable seasonal hazards
- Safety baseline8.5
- ·Normal precautions
| Sep | Jun | |
|---|---|---|
| Score | 9.4 Excellent | 9.5 Excellent |
| Season | ☀️ Dry season | ☀️ Dry season |
| High / low | 24° / 24° | 24° / 23° |
| Rain | 7 mm | 23 mm |
| Humidity | dew pt 19° | dew pt 19° |
| PM2.5 | 9 µg/m³ | 7 µg/m³ |
Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast).
Holidays & crowdsSeptember 2027
No long holidaysNo long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.
No national public holidays in Australia this month.
National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).
Explore Great Barrier ReefEvents, sights, food & souvenirs
Check event dates locallyThe world's largest coral reef system off Queensland, Australia, visited for snorkelling, diving, island stays and scenic flights from Cairns, Port Douglas and the Whitsundays.
Humpback whale seasonDate variesUsually July to September
Humpback whales come to the warm reef waters to give birth and nurse calves.
Why go: Often seen from boats on Whitsunday sailing trips.
Where: Whitsundays and the wider reef
Coming up later
Stinger seasonDate variesUsually November to May
Box jellyfish and Irukandji jellyfish are more common in warmer months.
Why go: Wear a full-body stinger suit when snorkelling or swimming and follow local signage.
Where: Coastal waters and parts of the reef
Coral spawningDate variesUsually a few nights after a full moon in November or December
Corals release eggs and sperm en masse in a synchronised night-time event.
Why go: Some dive operators run special night dives; exact dates can only be predicted roughly.
Where: Throughout the reef
Turtle nesting and hatchingDate variesNesting usually November to January, hatching January to March
Loggerhead and green turtles come ashore to lay eggs on southern reef beaches.
Why go: Mon Repos turtle viewing is by ranger-guided tour only.
Where: Mon Repos near Bundaberg and island cays such as Heron and Lady Elliot
Outer reef trips from Cairns
Day boats run from Cairns to outer reef pontoons and moorings for snorkelling and diving.
💡 Choose an operator with eco-certification; visibility is often best in the drier months.
Port Douglas and the Agincourt Reefs
A smaller resort town with boat trips to ribbon reefs and the Low Isles, close to the Daintree Rainforest.
Whitsunday Islands and Whitehaven Beach
A group of islands with the white silica sand of Whitehaven Beach and the Hill Inlet lookout.
💡 Hill Inlet's swirling sand patterns are best seen around low tide.
Heart Reef scenic flight
A naturally heart-shaped coral formation seen only from the air on flights from the Whitsundays.
Lady Elliot Island
A coral cay at the southern end of the reef, known for manta rays, turtles and reef-from-the-shore snorkelling.
Green Island
A small rainforest-covered coral cay close to Cairns, easy for a half-day trip.
Barramundi
A popular local fish, usually grilled or pan-fried.
💡 Seafood restaurants in Cairns and Port Douglas
Coral trout
A prized reef fish with delicate white flesh.
Fresh prawns
Queensland tiger and banana prawns, often eaten cold or grilled.
Tropical fruit
Mangoes, lychees and other tropical fruit grown in Far North Queensland, with mango season around summer.
💡 Rusty's Markets, Cairns
Aboriginal and Torres Strait Islander art
Paintings, prints and carvings by First Nations artists of the region.
💡 Galleries working directly with artists
Daintree tea
Tea grown in the Daintree region north of Port Douglas.
Airport transfer Kiwitaxi
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