Best time to go

Port Moresby in September 2026: weather, temperatures and activities

Do you want to visit Port Moresby in September 2026? Discover the usual weather at this time of year, average temperatures, the risk of rain, possible activities, and our opinion on whether September is a good month to travel to Port Moresby, Papua New Guinea.

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Is it worth visiting Port Moresby in September?

Check your ideal travel criteria and see if the month of September suits your plans to go to Port Moresby.
What matters most?
Port Moresby in September 2026: weather, temperatures and activities

Page summary

Port Moresby in September in summary
Favourable weather
Min 24°C Max 29°C 191 mm 11 day(s) 82% 36% 27°C UV 7 11.1 h/day
Best activities in September
Animal observationDiving and snorkelingNature and landscapesBoat trip and cruise
Practical guidelines
Very large crowds Low price 06:05 18:08
Hourly weather

Average weather in Port Moresby in September 2026

Favourable weather

The weather in Port Moresby in September 2026 is based on statistical data from previous years in September. This allows you to forecast the weather in September 2026. Check the hourly statistics (6:00, 9:00, 12:00, 15:00, 18:00, 21:00, 0:00 and 3:00), with the associated average temperature, for the whole month, and also, by navigating the tabs, for the beginning, middle and end of the month.

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Climate

Climate of Port Moresby in September

Temperatures, precipitation and monthly trends help to better understand the climate in Port Moresby in September.

Temperatures and rain in Port Moresby in September

Average daily weather

Temperatures and rain day by day in September.
Minimal Average Maximums Average rainfall

Monthly temperatures

The month of September is highlighted to compare it quickly with the rest of the year.
Minimal Average Maximums

Monthly precipitation

The bar for the month under study is highlighted.
Average rainfall

About the climate in Port Moresby in September

Seasonal normals

Seasonal normals of Port Moresby in September

Check the seasonal normals in Port Moresby in September and compare the weather with the previous month and the following month (or the months of your choice by selecting months in the form below): temperatures, wind, rain, humidity, climate rating...

Last updated: 12/01/2026
Reference period for normals: January 2009 - December 2025
Month analyzed
September
Weather data August September October
Outside temperature
Average temperature 25.8°C 26.5°C 27.2°C
Maximum temperature 28.1°C 28.8°C 29.4°C
Minimum temperature 23.5°C 24.2°C 25.0°C
Record maximum temperature 32.0°C
(2010)
33.0°C
(2010)
34.0°C
(2021)
Record low temperature 19.0°C
(2015)
21.0°C
(2019)
22.0°C
(2012)
Number of days at +30° 5 day(s)
(16%)
9 day(s)
(30%)
14 day(s)
(45%)
Number of days at +18° 31 day(s)
(100%)
30 day(s)
(100%)
31 day(s)
(100%)
Number of days below 0° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Sea temperature
Sea temperature (average) 25.5°C 25.8°C 27.3°C
Sea temperature (minimum) 24.4°C 24.6°C 24.8°C
Sea temperature (maximum) 27.0°C 27.0°C 29.6°C
Wind
Wind speed 22 km/h 22 km/h 20 km/h
Wind temperature 23.5°C 24.2°C 25.0°C
Precipitation (rain)
Precipitation 146.0 mm 191.4 mm 226.9 mm
Number of days with precipitation 19 day(s)
(61%)
21 day(s)
(70%)
24 day(s)
(77%)
Number of days with significant precipitation (greater than 5 mm) 8 day(s)
(26%)
11 day(s)
(37%)
13 day(s)
(43%)
Record precipitation in one day 92.1 mm
(2016)
155.3 mm
(2018)
63.8 mm
(2017)
Other weather data
Humidity 83% 82% 81%
Visibility 9.4 km 9.3 km 9.2 km
Cloud cover 36% 36% 32%
UV index 6 7 7
Daily sunshine 11h 11h 12h
Sunrise and sunset
Sunrise time 06h22 06h05 05h48
Sunset time 18h10 18h08 18h06
Day length 11h48 12h03 12h18
Our opinion on the climate in September
The review of Where And When favourable weather favourable weather fair weather
Activities and events

What to do in Port Moresby in September?

Best activities in September
Animal observationDiving and snorkelingNature and landscapesBoat trip and cruise
Possible activities in September
Beach and swimming
Observed weather

What was the weather like in Port Moresby in September last?

Find the observed weather calendar in Port Moresby in September 2025, with each day’s weather, temperatures and precipitation.

Mon. Tue. Wed. Thu. Fri. Sat. Sun.
1
Partly Cloudy
22°C29°C0.0 mm
2
Patchy rain nearby
23°C28°C0.1 mm
3
Clear/Sunny
23°C29°C0.2 mm
4
Clear/Sunny
23°C29°C0.0 mm
5
Partly Cloudy
23°C29°C0.4 mm
6
Clear/Sunny
24°C30°C0.2 mm
7
Clear/Sunny
24°C31°C0.0 mm
8
Clear/Sunny
23°C31°C0.0 mm
9
Clear/Sunny
23°C28°C0.0 mm
10
Partly Cloudy
23°C28°C0.5 mm
11
Light rain shower
23°C28°C5.4 mm
12
Patchy light drizzle
24°C28°C13.1 mm
13
Light rain shower
24°C27°C5.5 mm
14
Light rain shower
23°C26°C3.3 mm
15
Clear/Sunny
22°C26°C1.5 mm
16
Partly Cloudy
23°C28°C2.0 mm
17
Clear/Sunny
23°C29°C0.0 mm
18
Clear/Sunny
24°C29°C1.4 mm
19
Light rain shower
24°C28°C11.9 mm
20
Patchy rain nearby
23°C28°C1.6 mm
21
Light rain shower
24°C26°C14.4 mm
22
Patchy rain nearby
23°C24°C1.7 mm
23
Patchy rain nearby
23°C28°C1.7 mm
24
Patchy rain nearby
23°C29°C1.3 mm
25
Light rain shower
24°C28°C1.5 mm
26
Patchy rain nearby
23°C29°C1.8 mm
27
Partly Cloudy
23°C29°C3.2 mm
28
Clear/Sunny
23°C29°C9.6 mm
29
Clear/Sunny
24°C29°C0.2 mm
30
Clear/Sunny
23°C29°C1.7 mm
Nearby

Where to go near Port Moresby in September?

Compare cities and destinations near Port Moresby in September to find another travel stop, a nearby alternative or a logical continuation of your stay in Port Moresby.

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Every month

Best time to visit Port Moresby month by month

Compare the weather in Port Moresby across all months of the year and open each detailed page to find the best time.

Frequently asked questions

Travel to to Port Moresby in September: your frequently asked questions

Short answers to the questions we ask ourselves before booking for this month.

Yes, it’s a good time. Conditions are favorable in Port Moresby in September, which places this month 4th out of 12.

Expect an average of 29°C during the day and 24°C at night, with about 191 mm of precipitation spread over 11 rainy days.

Yes: the sea is 26°C on average in September, a pleasant temperature for swimming.

Expect about 11.1 hours of sunshine per day on average for this month.

This month is particularly suited to these activities: Animal observation, Diving and snorkeling, Nature and landscapes and Boat trip and cruise. These are the ones for which the conditions on site are most favourable.

Yes: this month is in Very large crowds, with a visitor index of 82/100. Book your accommodation and transportation well in advance.

No: rates are at level Low price, with a price index of 30/100. It’s one of the most budget-friendly months.

The most favorable months in Port Moresby are: June, July, August and September. You are therefore already in one of the best times of the year; shifting your plans would not gain you much in terms of weather.
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