Port Moresby is rarely comfortable to be outside at midday. It comes closest in mid July, and even then it is too hot. For sun, aim for June to mid September.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
The sun season here runs from June to mid September. It peaks in mid August, at 67. The weakest stretch is in early March, when it drops to 30, mostly because it is often wet. The clearest skies come in November, when the sky is typically 57% covered at midday (partly cloudy).
Being outside is not what Port Moresby is for: the Easy outdoors rating tops out at 17, mostly because it is too hot.
Walking is not what Port Moresby is for: the Active outdoors rating tops out at 2, mostly because it is too warm.
The year, measured
The average temperature in Port Moresby over the whole year is 27°C. November is the hottest month, with highs of about 32°C; August is the coldest, with lows of about 24°C. The rainy (wet) season in Port Moresby runs from November to May, peaking in November with a 72% chance of rain on a given day. The dry season is June to October; June is the driest month, at 45%. Winds in Port Moresby are highest in August, averaging 5.0 m/s (18 km/h), and lightest in March, at 3.0 m/s (11 km/h). The prevailing wind is from the S. The clearest skies in Port Moresby come in November, when the sky is typically 58% covered; September is the cloudiest month, at 68%.
Month by month Port Moresby climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 31°C | 24°C | 33°C | 71% | 63% | 3.5 m/s | 4 | 33 | 1 |
| February | 31°C | 24°C | 33°C | 71% | 64% | 3.7 m/s | 5 | 37 | 1 |
| March | 31°C | 24°C | 33°C | 72% | 67% | 3.0 m/s | 2 | 35 | 0 |
| April | 31°C | 24°C | 34°C | 66% | 62% | 3.0 m/s | 1 | 35 | 0 |
| May | 31°C | 25°C | 33°C | 71% | 61% | 3.7 m/s | 2 | 44 | 0 |
| June | 30°C | 24°C | 32°C | 45% | 59% | 4.2 m/s | 7 | 59 | 0 |
| July | 30°C | 24°C | 31°C | 48% | 62% | 4.6 m/s | 13 | 62 | 1 |
| August | 30°C | 24°C | 30°C | 46% | 65% | 5.0 m/s | 15 | 65 | 1 |
| September | 30°C | 24°C | 31°C | 48% | 68% | 5.0 m/s | 12 | 57 | 1 |
| October | 31°C | 24°C | 33°C | 58% | 65% | 4.0 m/s | 4 | 49 | 0 |
| November | 32°C | 25°C | 33°C | 72% | 58% | 3.7 m/s | 1 | 44 | 0 |
| December | 32°C | 25°C | 34°C | 72% | 59% | 3.4 m/s | 1 | 36 | 0 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Port Moresby weather by season
Year round, Port Moresby has days of about 30°C at their warmest in July, its coolest month, and 32°C in November, its warmest; the coolest hours of the day run from 24°C to 25°C through the year, and the average temperature over the year is 27°C around the clock. Rain is most likely around November and least likely around June. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Port Moresby weather in winterJune to August
Winter in Port Moresby has typical daily highs of about 30°C and lows of about 24°C, with a 46% chance of rain on a given day.
Port Moresby weather in springSeptember to November
Spring in Port Moresby has typical daily highs of about 31°C and lows of about 24°C, with a 60% chance of rain on a given day.
Port Moresby weather in summerDecember to February
Summer in Port Moresby has typical daily highs of about 31°C and lows of about 24°C, with a 71% chance of rain on a given day.
Port Moresby weather in autumnMarch to May
Autumn in Port Moresby has typical daily highs of about 31°C and lows of about 24°C, with a 70% chance of rain on a given day.
When is the rainy season in Port Moresby?
The rainy (wet) season in Port Moresby runs from November to May, peaking in November with a 72% chance of rain on a given day. The dry season is June to October; June is the driest month, at 45%.
What time of year is Port Moresby windiest?
Winds in Port Moresby are highest in August, averaging 5.0 m/s (18 km/h), and lightest in March, at 3.0 m/s (11 km/h). The prevailing wind is from the S.
What is the average temperature in Port Moresby year round?
The average temperature in Port Moresby over the whole year is 27°C. November is the hottest month, with highs of about 32°C; August is the coldest, with lows of about 24°C.
Where to go instead in mid April, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.