Port Moresby weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Good
Best time to visit: June – August
What is the weather like in Port Moresby in August?
In August, Port Moresby is hot: daytime highs average 29 °C, and even at night it stays warm at around 22 °C. The sea averages 25.4 °C – pleasant for swimming. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 56 mm in total. On about 6 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a good month for a holiday in Port Moresby.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 70 | 67 | 53 |
| Day | 28° | 29° | 30° |
| Night | 22° | 22° | 22° |
| Sea | 26° | 25° | 26° |
| Sun | 6 h | 6 h | 6 h |
| Rain days | 10 | 10 | 14 |
More details for August
- Daylight
- 11 h 47 min06:23 – 18:10
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 27 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 68 %on averageAll months
- Hot days
- 6 days30 °C or moreAll months
- Time zone
- UTC+10Pacific/Port_Moresby
How the score comes together
- Temperatureweight 50 %79 %
- Sunshineweight 20 %50 %
- Few rainy daysweight 30 %60 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Port Moresby in August: quick answers
Is Port Moresby hot in August?
Yes. In August, Port Moresby is hot: daytime highs average 29 °C and nights stay around 22 °C. On about 6 days the thermometer climbs to 30 °C or more.
Can you swim in Port Moresby in August?
Yes. In August the sea averages 25.4 °C – pleasant for swimming.
Does it rain much in Port Moresby in August?
Rain is frequent, with about 10 rainy days and 56 mm in total.
Port Moresby month by month
The whole year in Port MoresbyAll destinations: Papua New GuineaWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences