Best Time to Dive Milne Bay
Across 4 Milne Bay dive sites with multi-year conditions history, January historically shows the most favorable days — 100% of sampled days in the good band. The next-highest months are November (98%), April (98%) and December (97%). September historically shows the fewest favorable days (74% of sampled days). Average water temperature in the sample runs from about 27°C in August to 30°C in March. Typical seas range from 0.5 m to 1.2 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 Milne Bay?
| Month | Historically favorable days | Water temp | Typical seas |
|---|---|---|---|
| Jan | 100% | 30°C | 0.5 m |
| Feb | 95% | 30°C | 0.7 m |
| Mar | 96% | 30°C | 0.6 m |
| Apr | 98% | 30°C | 0.6 m |
| May | 77% | 29°C | 1.0 m |
| Jun | 91% | 28°C | 1.0 m |
| Jul | 80% | 27°C | 1.1 m |
| Aug | 78% | 27°C | 1.2 m |
| Sep | 74% | 27°C | 1.1 m |
| Oct | 96% | 28°C | 0.8 m |
| Nov | 98% | 28°C | 0.6 m |
| Dec | 97% | 30°C | 0.5 m |
% = share of sampled days scoring in the favorable band, median across 4 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 Eastern Australia region — not site-specific promises.
- Whale sharkDec–Jan
- OrcaJun–Jul
- Scalloped hammerheadOct–Feb
- Humpback whaleJun–Oct
- Reef manta rayJun–Sep
- Great white sharkJun–Dec
- Tiger 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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