New Britain Island Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in New Britain Island, Papua New Guinea in September.

Thinking about venturing to New Britain Island, Papua New Guinea this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in New Britain Island in September

New Britain Island, Papua New Guinea is a region in Papua New Guinea. September in New Britain Island generally has warm temperatures, with precipitation levels ranging from high to heavy.

Temperatures

You can expect warm maximum daytime temperatures of around 29°C (84°F) and nighttime temperatures around 25°C (77°F) in Kokopo.

To learn more about the conditions in specific areas of New Britain Island, Papua New Guinea, check out the map below.

Precipitation

In September, precipitation varies across different areas. From high rainfall in Kokopo with an average of 156 mm (6.1 in) to heavy rainfall in Kabaira with 249 mm (9.8 in). Based on climate data from the last 30 years, Kokopo typically sees the least rain in this month, making it the driest month of the year.

Average sunshine

September brings good sunshine to many areas. Kokopo sees around 195 hours of sunlight, great for visitors looking for bright days.

Explore New Britain Island by month

Pick a month to see the average temperature, rainfall and sunshine in New Britain Island — and find the best time to visit. (based on Kokopo)

Best Places to Visit in New Britain Island in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across New Britain Island.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in New Britain Island

What is the weather like in September for some of the most popular destinations in New Britain Island, Papua New Guinea?

Temperature range in New Britain Island (September)

Precipitation variation in New Britain Island (September)

Kokopo

In September Kokopo generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 25°C (77°F) and high monthly rainfall. So on average the conditions are pleasant that month.

August
September
October
Max temperature
28°C (82°F)
29°C (84°F)
29°C (84°F)
Min temperature
24°C (75°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
161 hours
195 hours
174 hours
Monthly rainfall
172 mm (6.8 in)
156 mm (6.1 in)
170 mm (6.7 in)
Monthly rainy days
19 days
19 days
21 days
Weather conditions

Kabaira

In September Kabaira generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 24°C (75°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

August
September
October
Max temperature
29°C (84°F)
29°C (84°F)
29°C (84°F)
Min temperature
24°C (75°F)
24°C (75°F)
24°C (75°F)
Monthly sun hours
161 hours
195 hours
174 hours
Monthly rainfall
242 mm (9.5 in)
249 mm (9.8 in)
250 mm (9.8 in)
Monthly rainy days
19 days
20 days
21 days
Weather conditions

Kimbe

In September Kimbe generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 24°C (75°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
29°C (84°F)
30°C (86°F)
30°C (86°F)
Min temperature
24°C (75°F)
24°C (75°F)
24°C (75°F)
Monthly rainfall
209 mm (8.2 in)
234 mm (9.2 in)
221 mm (8.7 in)
Monthly rainy days
19 days
19 days
21 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in New Britain Island, in Papua New Guinea.

In our records: Papua New Guinea September extremes

Notable September records observed across cities in Papua New Guinea in our climate database (1988 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the coldest September daytime high in Papua New Guinea was 17°C (63°F) in Goroka on September 22, 2025.

Popular cities in September

Day & night temperatures, rainfall and average weather in New Britain Island in September.

City Weather Day temp Night temp Rainfall
Kokopo 29°C (84°F) 25°C (77°F) 156 mm (6.1 in)
Kabaira 29°C (84°F) 24°C (75°F) 249 mm (9.8 in)
Kimbe 30°C (86°F) 24°C (75°F) 234 mm (9.2 in)

New Britain Island weather in September: frequently asked questions

What is the weather like in New Britain Island, Papua New Guinea in September?

In September, New Britain Island, Papua New Guinea generally has pleasant weather conditions. Kokopo sees daytime temperatures near 29°C (84°F), with nights cooling to roughly 25°C (77°F).

What is the average temperature in New Britain Island, Papua New Guinea in September?

In Kokopo, the average daytime high in September is 29°C (84°F), while nighttime temperatures drop to around 25°C (77°F).

Does New Britain Island, Papua New Guinea get a lot of rain in September?

Yes, September tends to be a wetter month in New Britain Island, Papua New Guinea. Average rainfall in Kokopo sits around 156 mm (6.1 in).

Is September a Good Time to Visit New Britain Island, Papua New Guinea?

We consider September to be one of the best times to travel to New Britain Island, Papua New Guinea. Typically, the climate in Kokopo is pleasant. However, the weather conditions may vary depending on your destination.

Generally speaking, June, August, September and October provide pleasant weather in Kokopo. The weather in January, February, March, April and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in New Britain Island.

Weather and climate has detailed information for every country in the world. Are you going to Papua New Guinea? Get detailed historical weather averages for many cities in Papua New Guinea.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.