Where to dive, month by month
Updated June 2026
Short answer: the Red Sea dives well year-round, with spring and autumn the sweet spot. The Maldives is also year-round but the action moves between atolls with the monsoon — December–April is calmest and clearest. Raja Ampat is at its best October–April, and the Galápagos splits into warm-and-clear December–May versus cooler, whale-shark-rich June–November. Pick the animal you want first, then the month.
Great diving is all about timing — water temperature, visibility, and whether the big animals are around. Here's the quick view, then the detail for each headline destination.
| Destination | Best window | Highlight |
|---|---|---|
| Red Sea (Egypt) | Year-round; Mar–May & Sep–Nov best | Coral walls, warm water, great value |
| Maldives | Dec–Apr calmest; May–Nov west atolls | Mantas & whale sharks by season |
| Raja Ampat | Oct–Apr | The most biodiverse reefs on earth |
| Galápagos | Dec–May clear; Jun–Nov whale sharks | Hammerheads, big pelagics (advanced) |
When is the Red Sea (Egypt) best?
Diveable year-round. Water is warmest June–September (great for long dives), while March–May and September–November offer the best balance of comfort and marine life. Winter is cooler but still excellent — and quieter.
When is the Maldives best?
A year-round destination split by monsoon. Manta and whale shark action peaks around the southwest monsoon (roughly May–November) on the western atolls, flipping to the eastern atolls in the drier December–April season — which also brings the calmest seas and best visibility.
When is Raja Ampat (Indonesia) best?
The standout window is October to April, when seas are calm and the famous biodiversity is in full effect. Many liveaboards pause in the rougher mid-year months.
When is the Galápagos best?
Two seasons: warm and calm (December–May) with better visibility, and cool and plankton-rich (June–November) when whale sharks patrol the northern islands. It's advanced diving with currents — but the payoff is hammerheads, mola mola and more.
How should you choose, then?
Pick the animal or experience you most want, then work back to the month — not the other way round. Visibility and big-animal sightings are never guaranteed, but going in the right season stacks the odds heavily in your favour.
Our honest pick
If you just want a near-certain bet, the Red Sea in spring or autumn is hard to beat — warm, easy, great value and good almost any month. Chasing a specific animal? Time it: mantas and whale sharks in the Maldives by atoll and monsoon, Raja Ampat from October to April, or Galápagos hammerheads from June to November if you have the experience for currents.
Next steps: if you're newer, start with the best dive destinations for beginners, work out the budget in how much a diving trip really costs, and get the qualification sorted in how to get scuba certified. When the dates firm up, put it all together in the dive trip planner.
Common questions
When is the best time to dive the Red Sea?
The Red Sea is diveable year-round. Water is warmest from June to September, while March to May and September to November give the best balance of comfortable temperatures and marine life. Winter is cooler but still excellent and quieter.
When is the best time to dive the Maldives?
The Maldives is a year-round destination split by monsoon. Manta and whale shark action peaks around the southwest monsoon, roughly May to November, on the western atolls, then shifts to the eastern atolls in the drier December to April season, which also brings the calmest seas and best visibility.
When is the best time to dive Raja Ampat?
The standout window for Raja Ampat is October to April, when seas are calm and its famous biodiversity is in full effect. Many liveaboards pause during the rougher mid-year months.
When is the best time to dive the Galápagos?
The Galápagos has two seasons. December to May is warm and calm with better visibility; June to November is cool and plankton-rich, when whale sharks patrol the northern islands. It is advanced diving with currents, but the payoff is hammerheads, mola mola and more.
Should I pick the destination or the month first?
Pick the animal or experience you most want, then work back to the month rather than the other way round. Sightings are never guaranteed, but diving in the right season stacks the odds heavily in your favour.
Related guides
- Best dive destinations for beginners
- How much does a scuba diving trip really cost?
- How to get scuba certified
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