Weather in Port Moresby - 14-day forecast

Detailed weather forecast for Port Moresby, Papua New Guinea: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Port Moresby

today☁️ 26°💧 0.1 mm

Sun🌤️ 27°💧 0.8 mm

Mon🌤️ 27°💧 10 mm

Tue☁️ 26°💧 1.9 mm

Wed🌤️ 27°💧 0.4 mm

Thu☀️ 26°💧 0.5 mm

Fri🌤️ 26°💧 0.3 mm

Sat☁️ 26°💧 0.5 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Tuesday 8 Sept in Port Moresby, the forecast high is 26°C. Typical daytime temperatures at this time of year range from 27°C to 29°C, so it will be exceptionally cool. It is cooler than 99% of similar days.

Saturday 5 Sept

26°Cexceptionally cool

usually 27°C–29°C

cooler than 96% of similar days

night: cooler than usual rain: typical rainfall wind: exceptionally light

Sunday 6 Sept

27°Ccooler than usual

usually 27°C–29°C

cooler than 85% of similar days

night: exceptionally cool rain: more rain than usual wind: exceptionally light

Monday 7 Sept

27°Ccooler than usual

usually 27°C–29°C

cooler than 85% of similar days

night: exceptionally cool rain: exceptionally wet wind: exceptionally light

Tuesday 8 Sept

26°Cexceptionally cool

usually 27°C–29°C

cooler than 99% of similar days

night: exceptionally cool rain: exceptionally wet wind: exceptionally light

Wednesday 9 Sept

27°Ccooler than usual

usually 27°C–29°C

cooler than 82% of similar days

night: exceptionally cool rain: typical rainfall wind: lighter than usual

Thursday 10 Sept

26°Cexceptionally cool

usually 27°C–29°C

cooler than 91% of similar days

night: exceptionally cool rain: more rain than usual wind: lighter than usual

Friday 11 Sept

26°Cexceptionally cool

usually 27°C–29°C

cooler than 96% of similar days

night: cooler than usual rain: typical rainfall wind: lighter than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 28°C by day. The coolest year was 2019 (26°C) and the warmest was 2010 (31°C). The current forecast averages 26°C - lower than in 96% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Port Moresby

Port Moresby - 14-day weather forecast infographic

Port Moresby 30 & 45-day weather - long-range outlook

Next 16 days · forecast

26°

around 23° at night · days with rain: 2

Weeks 3-4 · avg for September

30°

around 24° at night · rain chance 9%

Weeks 5-7 · avg for October

30°

around 25° at night · rain chance 15%

The 30 & 45-day outlook for Port Moresby: the next 16 days are a numerical forecast updated daily - on average 26° by day and 23° at night. Further out we rely on multi-year climate averages: around 30° in September, and about 30° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Port Moresby

Saturday5 September 2026

☁️26°overcast clouds

sunrise 06:12 · sunset 18:09 · night 24° · evening 24° · rain 0.1 mm · humidity 67% · wind 5 m/s · clouds 100%

Sunday6 September 2026

🌤️27°scattered clouds

sunrise 06:11 · sunset 18:09 · night 23° · evening 24° · rain 0.81 mm · humidity 73% · wind 7 m/s · clouds 33%

Monday7 September 2026

🌤️27°a few clouds

sunrise 06:10 · sunset 18:09 · night 22° · evening 24° · rain 10.04 mm · humidity 68% · wind 5 m/s · clouds 13%

Tuesday8 September 2026

☁️26°broken clouds

sunrise 06:10 · sunset 18:09 · night 22° · evening 23° · rain 1.9 mm · humidity 70% · wind 4 m/s · clouds 70%

Wednesday9 September 2026

🌤️27°scattered clouds

sunrise 06:09 · sunset 18:09 · night 23° · evening 24° · rain 0.36 mm · humidity 66% · wind 8 m/s · clouds 27%

Thursday10 September 2026

☀️26°clear sky

sunrise 06:09 · sunset 18:08 · night 22° · evening 24° · rain 0.51 mm · humidity 58% · wind 8 m/s · clouds 5%

Friday11 September 2026

🌤️26°scattered clouds

sunrise 06:08 · sunset 18:08 · night 24° · evening 24° · rain 0.33 mm · humidity 61% · wind 9 m/s · clouds 41%

Saturday12 September 2026

☁️26°broken clouds

sunrise 06:07 · sunset 18:08 · night 23° · evening 23° · rain 0.48 mm · humidity 67% · wind 7 m/s · clouds 69%

Sunday13 September 2026

🌧️26°light rain

sunrise 06:07 · sunset 18:08 · night 24° · evening 24° · rain 0.45 mm · humidity 69% · wind 6 m/s · clouds 49%

Monday14 September 2026

🌧️26°light rain

sunrise 06:06 · sunset 18:08 · night 24° · evening 24° · rain 0.48 mm · humidity 72% · wind 8 m/s · clouds 25%

Tuesday15 September 2026

☁️26°broken clouds

sunrise 06:06 · sunset 18:08 · night 23° · evening 24° · rain 0.12 mm · humidity 74% · wind 9 m/s · clouds 76%

Wednesday16 September 2026

☁️26°broken clouds

sunrise 06:05 · sunset 18:08 · night 23° · evening 23° · rain 0.96 mm · humidity 71% · wind 7 m/s · clouds 55%

Thursday17 September 2026

☁️26°overcast clouds

sunrise 06:04 · sunset 18:08 · night 24° · evening 23° · humidity 68% · wind 6 m/s · clouds 100%

Friday18 September 2026

☁️26°overcast clouds

sunrise 06:04 · sunset 18:08 · night 22° · evening 23° · humidity 65% · wind 7 m/s · clouds 100%

Saturday19 September 2026

☁️26°broken clouds

sunrise 06:03 · sunset 18:08 · night 22° · evening 23° · humidity 67% · wind 7 m/s · clouds 65%

Sunday20 September 2026

☀️27°clear sky

sunrise 06:03 · sunset 18:07 · night 22° · evening 24° · humidity 57% · wind 8 m/s · clouds 6%

UV index in Port Moresby - is it safe to sunbathe?

Today the UV index in Port Moresby is 8 (high) - unprotected fair skin can burn in about 25 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.

Sea temperature - Port Moresby

Water today

25°C

Week avg

25°C

Waves today

0.9 m

How's the water?

warm

16-day sea temperature forecast:

5.09 25°C6.09 25°C7.09 25°C8.09 26°C9.09 25°C10.09 25°C11.09 25°C12.09 25°C13.09 25°C

Average sea temperature through the year:

Jan 31°CFeb 30°CMar 31°CApr 31°CMay 29°CJun 28°CJul 27°CAug 26°CSep 26°COct 27°CNov 29°CDec 31°C

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Port Moresby

Air quality in Port Moresby is currently very good. Fine particulate PM2.5: 8.6 µg/m³, PM10: 13.2 µg/m³.

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Port Moresby	8.6	13.2	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 11:00).

Port Moresby weather through the year

Warmest, driest months on average: June, July, August, September.

Upcoming public holidays in Papua New Guinea: Independence Day — 16 September · Christmas Day — 25 December · Boxing Day — 26 December.

Nearby and related places

LaeGorokaMount HagenWewak

FAQ - Port Moresby weather

What is the weather like in Port Moresby today?

Today it is about 26° during the day and 24° at night, overcast clouds.

How far ahead can I check the forecast for Port Moresby?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.