Climate Insights for Port Moresby

The climate in Port Moresby is hot. The average annual temperature is 26°C and approximately 1,712 mm of precipitation falls per year. Port Moresby receives a notable amount of rainfall throughout the year, including during its driest month. Port Moresby sits near the equator, so seasonal temperature differences are minimal throughout the year.The climate in Port Moresby is hot. The average annual temperature is 80°F and approximately 67.4 in of precipitation falls per year. Port Moresby receives a notable amount of rainfall throughout the year, including during its driest month. Port Moresby sits near the equator, so seasonal temperature differences are minimal throughout the year.

Port Moresby has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is December, when average highs reach 30°C and the mean temperature sits around 27°C. August is the coolest month, with minimum temperatures around 23°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows.Port Moresby has relatively stable temperatures year-round, staying within a 12°F range. The warmest month is December, when average highs reach 86°F and the mean temperature sits around 81°F. August is the coolest month, with minimum temperatures around 74°F and an average of 78°F. Daily temperature variation is modest, with an average difference of 9°F between highs and lows.

Port Moresby is a fairly wet location, receiving approximately 1,712 mm of precipitation annually, which averages out to around 143 mm per month. The wettest month is March, averaging 281 mm of rainfall. January and February also tend to see above-average precipitation. The driest month is July, with just 43 mm. That's 238 mm less than March, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.Port Moresby is a fairly wet location, receiving approximately 67.4 in of precipitation annually, which averages out to around 5.6 in per month. The wettest month is March, averaging 11.1 in of rainfall. January and February also tend to see above-average precipitation. The driest month is July, with just 1.7 in. That's 9.4 in less than March, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Port Moresby is relatively calm, with an average annual wind speed of 11km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 9km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 15km/h in winter, 12km/h in spring, 9km/h in summer, 9km/h in autumn.Port Moresby is mildly breezy, with an average annual wind speed of 7mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is August, averaging 10mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in December, with average winds dropping to 5mph, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 5mph difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 9mph in winter, 7mph in spring, 6mph in summer, 6mph in autumn.

The table below shows monthly climate averages for Port Moresby based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for Port Moresby based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.