Rabaul Weather in September
Thinking of visiting Rabaul in September? Expect high temperatures reaching 29°C (84°F) during the day, dropping to 25°C (77°F) at night, with the driest conditions of the year.
Rainfall in Rabaul in September
With the least rainfall of the year, this month offers good conditions for outdoor exploration. Take advantage of the dry weather to plan your activities. You can typically expect 19 days of rain this month, averaging around 156 mm (6.1 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Rabaul in September
September in Rabaul sees highs of 29°C (84°F) and lows of 25°C (77°F) overnight. This kind of day-to-night contrast is typical for this time of year. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Rabaul in September
There are approximately 195 hours of sunshine this month, resulting in mostly clear days.
Wind Speed in Rabaul in September
Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.
Average water temperature in September
The water temperature is 28°C (82°F), which most people find very comfortable. A good month for swimming and water sports.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Rabaul.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Papua New Guinea, check out our Rabaul's climate page.
Rabaul Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Water Temperature
28°C (82°F)
Chance of Rain
65%
Precipitation
156 mm (6.1 in)
Rainy days
19 days
Humidity
69%
Windspeed
3 m/s (6 knots)
Sunshine
195 hours
Percentage Sunshine
Historical weather for Rabaul in September
Browse day-by-day weather records for Rabaul spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Rabaul historical weather extremes in September
Based on weather observations in Rabaul between 2006 and 2025, these are the recorded extremes during September.
- The hottest September day on record in Rabaul reached 32°C (90°F) (September 29, 2008).
- On September 4, 2015, Rabaul saw its coldest September day with temperatures maxing out at 26°C (79°F).
- Rabaul registered its coldest September night on September 18, 2008, with temperatures dropping to 23°C (73°F).
- The wettest September day on record brought 90 mm (3.5 in) of precipitation to Rabaul (September 14, 2024).
Best Places in Papua New Guinea in September
Find out more about the weather in Papua New Guinea and which places have the best travel conditions in this month. See all of Papua New Guinea in September →
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What to Wear in Rabaul in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. With water temperatures around 28°C (82°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Rabaul in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Papua New Guinea, check out our Rabaul's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Rabaul climate overview or explore weather in Papua New Guinea.
