Postans Weather Forecast

Today 16 Sep
- 10
- 17
Shower or two
Wed 17 Sep
- 14
- 19
Showers
Thu 18 Sep
- 12
- 17
Shower or two
Fri 19 Sep
- 12
- 19
Possible shower
Sat 20 Sep
- 10
- 20
Sunny
Sun 21 Sep
- 12
- 23
Sunny
Mon 22 Sep
- 14
- 25
Sunny

Today 16 Sep
1. 2 am
2. 5 am
3. 8 am
4. 11 am
5. 2 pm
6. 5 pm
7. 8 pm
8. 11 pm
Wed 17 Sep
1. 2 am
2. 5 am
3. 8 am
4. 11 am
5. 2 pm
6. 5 pm
7. 8 pm
8. 11 pm
Thu 18 Sep
1. 2 am
2. 5 am
3. 8 am
4. 11 am
5. 2 pm
6. 5 pm
7. 8 pm
8. 11 pm
Fri 19 Sep
1. 2 am
2. 5 am
3. 8 am
4. 11 am
5. 2 pm
6. 5 pm
7. 8 pm
8. 11 pm
Sat 20 Sep
1. 2 am
2. 5 am
3. 8 am
4. 11 am
5. 2 pm
6. 5 pm
7. 8 pm
8. 11 pm
Sun 21 Sep
1. 2 am
2. 5 am
3. 8 am
4. 11 am
5. 2 pm
6. 5 pm
7. 8 pm
8. 11 pm
Mon 22 Sep
1. 2 am
2. 5 am
3. 8 am
4. 11 am
5. 2 pm
6. 5 pm
7. 8 pm

Today 16 Sep Perth

Partly cloudy. Medium chance of showers. Light winds becoming northwesterly 15 to 20 km/h in the early afternoon.

Postans Temperature Statistics View More

September Temperature

Garden Island (12km)

Lowest 21 July, 2025
5.7 °C
Average 2025
18.9 °C
Highest 20 January, 2025
41.2 °C
Lowest 28 August, 2025
6.8 °C
Average August
14.4 °C
Highest 13 August, 2025
23.7 °C
Lowest 1 September, 2025
7.5 °C
Average September
14.5 °C
Highest 12 September, 2025
24.1 °C

Climate (2020–Present)

Garden Island (12km)

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Average Low 2020–2025
15.2 °C
Average 2020–2025
18.9 °C
Average High 2020–2025
23.3 °C

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