Climate guide for Rabaul, Papua New Guinea

Best Time to Visit
Rabaul

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About Rabaul

Rabaul's landscape is shaped by volcanoes, a flooded caldera, wartime tunnels and relics, hot springs, and the wider waters of East New Britain. A strong visit combines the town's history with guided volcano viewpoints, cultural stops, and carefully operated dive or boat trips. Ash, rain, tides, and volcanic conditions can change access, so check local and official updates before setting out. Use experienced guides, never enter unstable wartime structures or restricted volcanic areas, ask before photographing communities, and leave a weather buffer around flights.

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Travel Tips

Best time & timing
Check monthly climate scores for Rabaul before finalizing your trip dates for optimal outdoor comfort.
Getting around
Plan local transport and transfers in Rabaul early, especially during peak travel months in Papua New Guinea.
Packing advice
Pack layerable clothing suitable for sightseeing exploration in Rabaul's climate conditions.

Things to do in Rabaul

Rabaul, Papua New Guinea. Live activities and tours from GetYourGuide, matched to this destination.

When to visit Rabaul: the short answer

The best time to visit Rabaul is September, followed by November, October. Those months combine the most usable temperatures with the fewest lost days to rain: September averages 29°C with 140 mm of rain and about 22 sunny days. The months to avoid unless you have a specific reason are July, May. If budget matters more than perfect weather, June is the strongest of the low-rate months at 3.6/10.

Across the year Rabaul swings from 28°C in February to 29°C in November, a 1-degree spread, while rainfall ranges from 133 mm in November to 318 mm in February. That is the whole planning problem in one sentence: Rabaul is not equally good year-round, and the difference between the best and worst month here is 1.2 points on a 10-point scale.

Warmest month: November (29°C). Coolest: February (28°C). Driest: November (133 mm). Wettest: February (318 mm).

Rabaul month by month

January in Rabaul — the hardest end of the year

Hardest · 3.6/10

January averages 29°C (83°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

244 mm of rain puts this in monsoon territory — about 23 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.6/10 here, 5th of 12 months, against 4.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

February in Rabaul — the hardest end of the year

Hardest · 3.4/10

February averages 28°C (83°F) with humidity around 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

318 mm of rain puts this in monsoon territory — about 19 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.4/10 here, 8th of 12 months, against 4.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

March in Rabaul — the hardest end of the year

Hardest · 3.7/10

March averages 28°C (83°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

239 mm of rain puts this in monsoon territory — about 24 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.7/10 here, 4th of 12 months, against 4.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

April in Rabaul — the hardest end of the year

Hardest · 3.4/10

April averages 29°C (84°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

255 mm of rain puts this in monsoon territory — about 21 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.4/10 here, 9th of 12 months, against 4.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

May in Rabaul — the hardest end of the year

Hardest · 3.3/10

May averages 29°C (84°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

224 mm of rain puts this in monsoon territory — about 18 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.3/10 here, 11th of 12 months, against 4.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

June in Rabaul — the hardest end of the year

Hardest · 3.6/10

June averages 29°C (84°F) with humidity around 76%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

At 157 mm this is a genuinely wet month: about 16 sunny days in total, and outdoor plans need an indoor fallback.

It scores 3.6/10 here, 6th of 12 months, against 4.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

July in Rabaul — the hardest end of the year

Hardest · 3.2/10

July averages 29°C (84°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

At 200 mm this is a genuinely wet month: about 13 sunny days in total, and outdoor plans need an indoor fallback.

It scores 3.2/10 here, 12th of 12 months, against 4.4/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

August in Rabaul — the hardest end of the year

Hardest · 3.4/10

August averages 29°C (83°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

229 mm of rain puts this in monsoon territory — about 18 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.4/10 here, 10th of 12 months, against 4.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

September in Rabaul — the year's strongest window

Best window · 4.4/10

September averages 29°C (83°F) with humidity around 76%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

At 140 mm this is a genuinely wet month: about 22 sunny days in total, and outdoor plans need an indoor fallback.

On our climate-comfort scale this is the top-ranked month of the year for Rabaul at 4.4/10 — the reference point every other month on this page is measured against.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

October in Rabaul — the hardest end of the year

Hardest · 4.3/10

October averages 29°C (84°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

At 140 mm this is a genuinely wet month: about 25 sunny days in total, and outdoor plans need an indoor fallback.

It scores 4.3/10 here, 3rd of 12 months, against 4.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

November in Rabaul — the hardest end of the year

Hardest · 4.4/10

November averages 29°C (84°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

At 133 mm this is a genuinely wet month: about 24 sunny days in total, and outdoor plans need an indoor fallback.

It scores 4.4/10 here, 2nd of 12 months, against 4.4/10 in the destination's best month.

Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

December in Rabaul — the hardest end of the year

Hardest · 3.5/10

December averages 29°C (84°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

235 mm of rain puts this in monsoon territory — about 20 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.5/10 here, 7th of 12 months, against 4.4/10 in the destination's best month.

Expect mid-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

Frequently asked

When is the best time to visit Rabaul, Papua New Guinea?
In Ideal Weather mode, the best months to visit Rabaul are September, November, October. September is the single peak month with an Ideal Weather score of 4.4/10 based on temperature, rainfall, humidity, daylight and historical sunny days.
What is the weather like in Rabaul year-round?
Rabaul has a climate profile suited to sightseeing and cultural travel. Average monthly temperatures range from 28°C in February to 29°C in November, with Ideal Weather scores between 3.2 and 4.4 out of 10.
Which months should I avoid in Rabaul?
The lowest Ideal Weather-scoring months in Rabaul are July (3.2/10), May (3.3/10), February (3.4/10). These months typically combine less comfortable temperatures, higher rainfall or fewer sunny days.
When is the rainy season in Rabaul?
February is the wettest month in Rabaul, averaging about 318 mm of rainfall. November is the driest, at roughly 133 mm.
Which is the sunniest month in Rabaul?
October sees the most sun in Rabaul, with about 25 sunny days on average - ideal for outdoor plans.
Is Rabaul a good destination for sightseeing and cultural travel?
Rabaul is well suited to sightseeing and cultural travel. Its highest Ideal Weather window (September, November, October) aligns with the conditions travelers usually look for in this style of trip.
How is the bestime.to score for Rabaul calculated?
Each month receives an Ideal Weather score from 0-10 using ERA5 climate normals for Rabaul: temperature comfort, precipitation, humidity, daylight hours, and historical sunny days - weighted for sightseeing and cultural travel.

Explore by month

Curated in Rabaul

Tickets & experiences