Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 30.3 °C | 29.3 °C | 24 days | Unfavourable season |
| February | 30.7 °C | 29.5 °C | 19 days | Unfavourable season |
| March | 29.6 °C | 29 °C | 20 days | Unfavourable season |
| April | 28.2 °C | 28.1 °C | 16 days | Possible, with trade-offs |
| May | 26.2 °C | 26.1 °C | 12 days | Ideal — one of the best times of year |
| June | 24.9 °C | 24.7 °C | 10 days | Ideal — one of the best times of year |
| July | 24.2 °C | 23.9 °C | 8 days | Ideal — one of the best times of year |
| August | 25 °C | 24 °C | 7 days | Ideal — one of the best times of year |
| September | 26.5 °C | 25 °C | 8 days | Ideal — one of the best times of year |
| October | 28.4 °C | 26.5 °C | 8 days | Ideal — one of the best times of year |
| November | 29.8 °C | 27.8 °C | 12 days | Ideal — one of the best times of year |
| December | 30.2 °C | 28.9 °C | 17 days | Possible, with trade-offs |
Nearby in April
Before you go
Three things to check once you have picked your dates.
Entry
No visa, but an electronic travel authorisation (eVisitor) must be obtained online before departure (no visa application charge or service fee). Passport valid until your return date. A visa is mandatory: apply online for the free eVisitor (or the ETA app) before travelling.
For a British passport, per the UK Foreign Office on 19 March 2026. Rules change: check before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 19 March 2026
Health
Vaccines · hepatitis B if you are not already vaccinated; Japanese encephalitis depending on activities and areas visited. Routine vaccines up to date (measles in particular).
Yellow fever · No yellow fever locally, vaccine not recommended. Certificate required only if you arrive from a country with yellow fever risk.
Malaria · None.
Mosquitoes · dengue reported: protect yourself from bites.
Per the CDC (page reviewed 25 August 2026); see a travel clinic a few weeks before departure.
Beau Fixe is not a safety or health authority. These notes summarise dated public texts and link to their source: France Diplomatie (Licence Ouverte 2.0), Foreign, Commonwealth & Development Office (gov.uk, Open Government Licence v3.0), Centers for Disease Control and Prevention (Source: CDC). Only the competent authorities are authoritative.
FAQ
Can you swim in Cairns (Great Barrier Reef) in April?
The sea averages 28.1°C in April — yes, pleasant swimming.
How hot is Cairns (Great Barrier Reef) in April?
Expect 28.2°C in the afternoon and 22.8°C at night, averaged over the last 10 years.
Does it rain a lot in Cairns (Great Barrier Reef) in April?
Around 16 days with rain (≥ 1 mm) in the month — 52% of days.