Port Moresby Weather in August
Port Moresby in August sees high daytime temperatures of 29°C (84°F) and nighttime lows of 23°C (73°F). Moderate rainfall is typical, with around 49 mm (1.9 in) for the month.
Rainfall in Port Moresby in August
Expect around 6 days of rain based on historical data, with 49 mm (1.9 in) average. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in Port Moresby in August
August is a good time to be in Port Moresby. Days are perfect, reaching 29°C (84°F), with nights around 23°C (73°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 23°C (73°F), evenings stay pleasantly warm.
Sunshine in Port Moresby in August
The city usually sees around 225 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Average water temperature in August
With water at 26°C (79°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period — it feels comfortable straight away.If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Port Moresby.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Papua New Guinea, check out our Port Moresby's climate page.
Port Moresby Temperature in August
Min Temperature
23°C (73°F)
Max Temperature
29°C (84°F)
Water Temperature
26°C (79°F)
Chance of Rain
18%
Precipitation
49 mm (1.9 in)
Rainy days
6 days
Humidity
75%
Sunshine
225 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Port Moresby typically stay consistent throughout August, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 23°C (73°F).
Average temperatures in August
Historical weather for Port Moresby in August
Browse day-by-day weather records for Port Moresby spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Port Moresby historical weather extremes in August
According to our 20 years of weather records for Port Moresby, the following extremes were recorded between 2005 and 2025.
- The hottest August day on record in Port Moresby reached 38°C (100°F) (August 2, 2021).
- The coldest August day was on August 12, 2012, with a maximum of 25°C (77°F).
- The lowest overnight temperature recorded in August was 16°C (61°F) (August 15, 2015).
Best Places in Papua New Guinea in August
Find out more about the weather in Papua New Guinea and which places have the best travel conditions in this month. See all of Papua New Guinea in August →
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What to Wear in Port Moresby in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 26°C (79°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Port Moresby in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Papua New Guinea, check out our Port Moresby's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Port Moresby climate overview or explore weather in Papua New Guinea.
