Port Moresby weather in August
August in Port Moresby: hot, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Port Moresby · #343 of 604 destinations to visit in August · comfort 77/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Port Moresby climate normals — August
| Daytime high | 29°C / 85°F | 🥵 hot |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Feels like (high) | 32°C / 90°F | |
| Rainfall | 41 mm / 1.6 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 21°C / 69°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 11.8 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Port Moresby?
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Port Moresby in August — FAQ
- Is August a good time to visit Port Moresby?
- August in Port Moresby: hot, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Port Moresby on SeasonMap's comfort score (77/100).
- What is the weather like in Port Moresby in August?
- In August, Port Moresby averages a daily high of 29.3°C and a low of 23°C, with about 41 mm of rain over roughly 8 rainy days.
- What is the air quality in Port Moresby in August?
- Port Moresby has a mean US Air Quality Index of about 41 in August.