Aldabra Atoll vs Silhouette Island — Dive Destination Comparison
Aldabra Atoll (Seychelles) scores 66.2/100 vs Silhouette Island's 64.3/100 in OkToDive's 12-category rating. Choose Aldabra Atoll for reef diving with 20–40m visibility. Choose Silhouette Island for reef diving at ~$140/dive.
Last updated: 2026-07-22
Side-by-side comparison
| Metric | Aldabra Atoll | Silhouette Island |
|---|---|---|
| OkToDive Score | 66.2/100 | 64.3/100 |
| Country | Seychelles | Seychelles |
| Visibility | 20--40m | 12--28m |
| Water temp | 25--30 C | 25--30 C |
| Max depth | 40m | 35m |
| Current | strong | moderate |
| Cost per 2-tank dive | $350 | $140 |
| Budget tier | ultra luxury | luxury |
| Best months | March, April, May | March, April, May |
| Dive types | reef, wall, drift, channel | reef, wall, granite boulders |
| Min certification | Advanced Open Water | Open Water |
| Key species | giant tortoise, manta ray, hammerhead shark | whale shark, hawksbill turtle, batfish |
| Google rating | 4.9 (25 reviews) | 4.6 (48 reviews) |
Which should you choose?
Choose Aldabra Atoll when...
- + Marine life enthusiasts seeking giant tortoise encounters
- + Experienced drift divers comfortable in current
- + Wide-angle photographers wanting crystal visibility
- + Dedicated divers willing to commit to a liveaboard trip
Skip if
- - You're uncomfortable in strong currents
- - You don't have Advanced certification
- - You're on a tight budget — avg $350/dive
Choose Silhouette Island when...
- + Divers who prioritize reef diving
- + Anyone visiting Indian Ocean for the first time
- + Groups seeking 10+ named dive sites in one area
Skip if
- - You don't have Advanced certification
- - You're on a tight budget — avg $140/dive
Bottom line
Aldabra Atoll wins on overall score (66.2 vs 64.3), but the right choice depends on your priorities. Silhouette Island is more affordable ($140 vs $350/dive). Aldabra Atoll has better peak visibility (40m vs 28m).