Best Time to Dive East New Britain (Rabaul)
Across 3 East New Britain (Rabaul) dive sites with multi-year conditions history, October historically shows the most favorable days — 100% of sampled days in the good band. The next-highest months are January (99%), May (99%) and April (99%). August historically shows the fewest favorable days (84% of sampled days). Average water temperature in the sample runs from about 30°C in August to 31°C in January. Typical seas range from 0.4 m to 0.8 m of significant wave height through the year. These figures are historical climatology computed from measured conditions — patterns, not a forecast or a guarantee.
Computed from our own conditions climatology — measured history, not brochure copy.
Which months are historically most favorable in East New Britain (Rabaul)?
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 99% | 31°C | 0.5 m |
| Feb | 91% | 30°C | 0.8 m |
| Mar | 96% | 30°C | 0.6 m |
| Apr | 99% | 30°C | 0.4 m |
| May | 99% | 30°C | 0.5 m |
| Jun | 97% | 30°C | 0.5 m |
| Jul | 89% | 30°C | 0.6 m |
| Aug | 84% | 30°C | 0.7 m |
| Sep | 90% | 30°C | 0.6 m |
| Oct | 100% | 30°C | 0.5 m |
| Nov | 98% | 31°C | 0.5 m |
| Dec | 95% | 30°C | 0.5 m |
% = share of sampled days scoring in the favorable band, median across 3 dive sites with at least two years of history. Ringed = historical peak.
How does this compare worldwide? The Most Reliable Diving Months on Earth ranks 61 countries by the same measure.
Marine life seasons
Sighting patterns across the wider Micronesia & western Pacific region — not site-specific promises.
- Whale sharkDec–Jan
- Scalloped hammerheadFeb–Mar
- Humpback whaleJul–Oct
- Reef manta rayJun–Sep
- Tiger sharkyear-round
- Bull sharkyear-round
- Green sea turtleyear-round
Bars are Jan–Dec — months when sightings historically concentrate (GBIF occurrence records). Wildlife is never guaranteed.
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