July & August
Book six to nine months ahead. The boutique hulls — there are few of them — go first, and the best crews are committed early.
Seasons · The Flores Sea
April to October, and the honest caveats
The calmest water, the clearest reefs and the driest mountain roads — plus what still works in the months everyone else avoids.
Check my datesIn short
The Flores Sea is calmest from April to October, which is the prime window for sailing, diving and the Trans-Flores road.
- Dry season April–November
- July–August: superb, busiest, book months ahead
- Manta aggregations peak December–February
- Shoulder months: same boats, emptier anchorages
Month by month
January
- Flores Sea & rain
- Rough at times · heaviest rain of the year
- Crowds & booking pressure
- Low · low
February
- Flores Sea & rain
- Rough at times · heavy rain
- Crowds & booking pressure
- Low · low
March
- Flores Sea & rain
- Easing · moderate, easing
- Crowds & booking pressure
- Low · low–moderate
April
- Flores Sea & rain
- Calming fast · light rain
- Crowds & booking pressure
- Moderate · moderate
May
- Flores Sea & rain
- Calm · light rain
- Crowds & booking pressure
- Moderate · moderate–high
June
- Flores Sea & rain
- Calm · very light rain
- Crowds & booking pressure
- Building · high
July
- Flores Sea & rain
- Calm, breezy afternoons · driest
- Crowds & booking pressure
- Peak · very high
August
- Flores Sea & rain
- Calm, steady trade winds · driest
- Crowds & booking pressure
- Peak · very high
September
- Flores Sea & rain
- Calm · very light rain
- Crowds & booking pressure
- Moderate · high
October
- Flores Sea & rain
- Calm · light rain
- Crowds & booking pressure
- Moderate · moderate–high
November
- Flores Sea & rain
- Mostly settled · building late
- Crowds & booking pressure
- Low–moderate · moderate
December
- Flores Sea & rain
- Mixed · wet
- Crowds & booking pressure
- High over the holidays · high for festive dates
Best months per experience
Liveaboard sailing
- Best months
- April–June · September–November
- Why
- Calmest seas, golden light, full route freedom
Komodo diving
- Best months
- May–September
- Why
- 20–30 m visibility in the dry months
Manta aggregations
- Best months
- December–February
- Why
- Plankton draws the largest numbers to the cleaning stations
Overland Trans-Flores
- Best months
- May–October
- Why
- Dry mountain roads, clear passes
Kelimutu sunrise
- Best months
- June–September
- Why
- Clearest crater-lake mornings of the year
Wae Rebo trek
- Best months
- May–October
- Why
- Dry trail underfoot; the morning mist is the point
Reef mantas are resident at Karang Makassar year-round. December to February is when the numbers peak, not when they arrive.
What still works in the wet season
December to March brings the heaviest rain and the roughest water, and most eastern sea itineraries pause. That is the honest version.
What still works: Komodo itself, on shorter runs and with a flexible captain. Manta aggregations at the cleaning stations are at their strongest. And the park is genuinely quiet.
Rain here is usually a heavy afternoon rather than a grey week. Travellers who have been before sometimes choose these months deliberately, and are rarely disappointed.
Booking windows
When to actually book
The weather decides when to go. Availability decides when to ask.
Shoulder months
Three to four months is usually comfortable for April–June and September–November, and you get more anchorage choice.
Wet season
Weeks rather than months. This is when a last-minute private charter is genuinely possible.
Festive dates
Christmas and New Year behave like peak season regardless of the weather. Treat them as July.
Frequently Asked Questions
Check your dates against the season
Send us the window you can travel in. We will say plainly what it is good for, what it is not, and which boats are still open.