Port Moresby weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: June – August
What is the weather like in Port Moresby in December?
In December, Port Moresby is hot: daytime highs average 30 °C, and even at night it stays warm at around 23 °C. The sea averages 29.1 °C – almost as warm as a bath. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 24 days, totalling 220 mm. On about 15 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, December is not an ideal month for a holiday in Port Moresby.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 40 | 39 | 40 |
| Day | 30° | 30° | 30° |
| Night | 23° | 23° | 23° |
| Sea | 28° | 29° | 30° |
| Sun | 6 h | 6 h | 5 h |
| Rain days | 21 | 24 | 24 |
More details for December
- Daylight
- 12 h 40 min05:46 – 18:27
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 84 %on averageAll months
- Hot days
- 15 days30 °C or moreAll months
- Time zone
- UTC+10Pacific/Port_Moresby
How the score comes together
- Temperatureweight 50 %61 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Port Moresby in December: quick answers
Is Port Moresby hot in December?
Yes. In December, Port Moresby is hot: daytime highs average 30 °C and nights stay around 23 °C. On about 15 days the thermometer climbs to 30 °C or more.
Can you swim in Port Moresby in December?
Yes. In December the sea averages 29.1 °C – almost as warm as a bath.
Does it rain much in Port Moresby in December?
It rains often – on about 24 days, adding up to 220 mm.
Port Moresby month by month
The whole year in Port MoresbyAll destinations: Papua New GuineaWhere to go in DecemberSea temperature in December
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