Port Moresby Weather in August
What's the weather like in Port Moresby (National Capital District) in August 2025?
The climate in Port Moresby during August can be summarized as hot, humid and reasonably dry.
August is in the winter in Port Moresby and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a steamy 29°C (84°F), whilst at night 22°C (71°F) is normal.
| Daytime temperature | 29.1°C 84.4°F |
|---|---|
| Nightly temperature | 21.9°C 71.4°F |
| Average temperature | 25.5°C 77.9°F |
| Daily sunshine | 7 hrs |
| Avg rainfall | 49 mm 1.9 ins |
| Rainy days | 6 days |
| Sea temperature | 25.4°C 77.8°F |
| Humidity | 76% |
| Windspeed | 18.4kph 11 mph |
On average August is the 2nd driest month of the year in Port Moresby with around 49mm 1.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
August temperatures in Port Moresby
August rainfall
August hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Port Moresby in August 2025.
Other monthly averages
Best places to visit in August
Port Moresby weather stats
| Hottest month: | December | 31.3°C 88.3°F |
|---|---|---|
| Driest month: | July | 40mm 1.6ins |
| Sunniest month: | October | 7.6hrs |
| Coldest month: | July | 28.6°C 83.5°F |
| Wettest month: | March | 248mm 9.8ins |
© Google