Rottnest Island Weather in September

Rottnest Island in September averages 19°C (66°F) during the day and 14°C (57°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Rottnest Island in September

The climate data from previous years indicates about 10 days of rain, averaging 71 mm (2.8 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Rottnest Island in September

In September, Rottnest Island sees pleasant temperatures, with highs of 19°C (66°F). Nights drop to around 14°C (57°F). Conditions are often most pleasant around the middle of the day. Nights cool down to 14°C (57°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Rottnest Island in September

The days are predominantly sunny, with an estimated total of around 230 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

For Rottnest Island itself, January, February, March, April, May, October, November and December generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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• January
• February
• March
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• May
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• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Rottnest Island's climate page.

Rottnest Island Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 34%  

Precipitation 71 mm (2.8 in)  

Rainy days 10 days  

Humidity 53% *  

Sunshine 230 hours *  

Percentage Sunshine *  

* Data from: Perth, Australia (41 KM, 26 Miles).

What to Wear in Rottnest Island in September

For Rottnest Island in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Rottnest Island in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Rottnest Island's climate page.

More climate data for Rottnest Island

Temperature Rainfall Sunshine Humidity

See the full Rottnest Island climate overview or explore weather in Australia.