Weather in Port Moresby in August 2025
- August is usually the driest month of the year in Port Moresby
Average weather
Average temperature in Port Moresby in August
The expected average maximum temperature in August is +28°C with a maximum of +30°C and a minimum of +18°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +29°C to +29°C.
Is Port Moresby warm or cold in August?
Port Moresby is typically warm in August.
Maximum temperatures go up compared to the previous month from +28°C to +28°C. The minimum temperature also goes up from +23°C to +23°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the coolest months in Port Moresby, here is the comparison with other months:
Climate in Port Moresby in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +28°C | +28°C | +28°C | ||||
| Min. temperature | ||||||
| +18°C | +17°C | +18°C | ||||
| Max. temperature | ||||||
| +31°C | +31°C | +31°C | ||||
| Rainfall | ||||||
| 31 mm | 31 mm | 42 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 81% | 80% | 80% | ||||
| Air pressure | ||||||
| 1010 HPa | 1011 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 1 | 2 | 2 | ||||
| Cloudy days | ||||||
| 17 | 17 | 13 | ||||
| Rainy days | ||||||
| 12 | 12 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +28°C for average maximum temperature during the day. The rainfall amount in August stays the same as in the previous month with a 31 mm of total precipitation. It feels drier, as humidity decreases from 81% to 80%. The average wind speed doesn’t change much during August, staying around 3 m/s. The good news is there are likely to be more sunny days in August, from 1 to 2.
September brings much the same weather, it remains good.
Wind
The average wind speed is 5 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Port Moresby is gradually decreasing during August, going from 6 m/s to 3 m/s over the course of the month.
Rain
How was the weather last August in Port Moresby?
Climate Change over Years
The climate in Port Moresby in August has not changed much over the last 43 years.
The average temperature was the lowest in 1982 (+28°C) and the highest in 2024 (+30°C). The driest year was 1997 with only 892 mm of rainfall, and the wettest year was 2006 with 1873 mm.
FAQ
Is August a good time to visit Port Moresby?
Can you sunbathe in Port Moresby in August?
Is Port Moresby rainy in August?
Is it sunny in Port Moresby in August?
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Monthly weather in Port Moresby
Source of the data
For this page, we’ve looked at the typical weather in Port Moresby, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
