Australia
Cairns in September: weather, sea & travel advice
This month's data profile
Sea conditions lead
Cairns in September is climatically well suited to beach holidays, family holidays, city breaks and active holidays and hiking. The average daily high is around 26 °C, and the sea is about 25 °C. With about 6 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
90/100 · #1
Warmth
#7
Dryness
#1
Sun
#4
Sea warmth
#9
Published best categories: Overall, Beach, City break, Active, Family
Cairns · SeptemberPhoto: Ank Kumar · CC BY-SA 4.0Climate facts
- Average high
- 26 °C
- Average low
- 18 °C
- Sea
- 25 °C
- Rainy days (est.)
- 6 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 75 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 24 | 16 | 8 | 44 | 6.2 | 78 | 1.8 | 24 | 87 |
| September (selected) | 26 | 18 | 6 | 35 | 7.5 | 75 | 1.8 | 25 | 90 |
| October | 29 | 19 | 8 | 57 | 8.3 | 73 | 1.8 | 26 | 83 |
How do the previous and next months compare?
Baseline: September (90/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | -3 | -2.5 °C | -1.6 °C | +1.7 | +9.2 mm | -1.3 h | +3.4 % | ±0 m/s | -1.1 °C |
| October | -7 | +2.1 °C | +1.8 °C | +2 | +22.2 mm | +0.8 h | -1.5 % | ±0 m/s | +1.3 °C |
All twelve months in context
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Frequently asked questions
How warm is Cairns in September?
The average daily high is around 26 °C, with an average daily low of about 18 °C.
Can you swim in Cairns in September?
The sea is about 25 °C (warm).
Does it rain a lot in Cairns in September?
The curated estimate is about 6 rainy days per month, not a directly measured long-term average. Total precipitation averages around 35 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Cairns?
By the climate score, July, August, September and October are the strongest months for Cairns. For a beach trip: August, September, October and November. September is one of them.