Raja Ampat · Month comparison
January vs May
May ranks #1 overall vs January at #9. Pre-peak sweet spot — dry season has arrived, visibility at 25–30m, and the crowds haven't caught up with the conditions yet.
January
#9 of 12 months
Strong option
Diving prime despite the rain — manta rays at Manta Sandy active all month, but west-coast sites rougher when westerly swells build.
- ↑Manta rays reliably present at Manta Sandy and Manta Ridge cleaning stations
- ↑European peak holiday season drives liveaboard demand — more operators running
May
#1 of 12 months
Best match
Pre-peak sweet spot — dry season has arrived, visibility at 25–30m, and the crowds haven't caught up with the conditions yet.
- ↑25–30m visibility in dive sites including the famous Cape Kri fish count spot
- ↑Liveaboard prices still 15–20% below July–August peak
| Factor | January | May |
|---|---|---|
| Weather score | 6 | 9 |
| Value score | 5 | 7 |
| Crowd score | 5 | 7 |
| Events score | 5 | 3 |
| Atmosphere | 8 | 9 |
| Avg high temp | 30°C | 31°C |
| Monthly rain | 195mm | 95mm |
| Daily sunshine | 5hrs | 7hrs |
January trade-offs
- ↓195mm rain — above-water photography limited on overcast days
- ↓West-facing sites (Wayag, Piaynemo) can be inaccessible when westerly swell runs
May trade-offs
- ↓Some liveaboard routes still avoiding southern passages until June
- ↓Fewer dive operators running than July–August — less schedule flexibility
Scores compare months within Raja Ampat. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →