May–Aug
Peak Dry Season
Clear skies, low humidity and the calmest seas of the year.
- Days around 29°C, evenings 24°C
- Diving visibility often over 30 m
- Consistent west coast surf
Travel Guide
Best Time for Bali to Sumba
May to October brings sunshine and calm seas, but every season has its own reward.
Climate: Dry vs Wet Season
Two seasons shape every Bali to Sumba trip.
The dry season runs from May to October, with steady sunshine, low humidity and little rain.
The wet season brings short afternoon downpours and lush landscapes. Sumba’s dry season is often more pronounced than Bali’s.
- Dry season
- May–Oct
- Dry season days
- 28–32°C
- Wet season
- Nov–Apr
- Wet season days
- 26–30°C
Season by Season: Choose Your Season
Weather, crowds and conditions through the year.
Flights Bali to SumbaAt Sea: Marine Conditions
Diving, surfing and sailing change with the season.
May – October
Dry Season Seas
Calm water, mild currents and peak visibility.
- Visibility often exceeds 30 m
- Water around 27–29°C
- Powerful, consistent west coast swells
November – April
Wet Season Seas
Choppier water, still rewarding with the right plan.
- Visibility drops to around 10–20 m
- Sheltered breaks offer uncrowded waves
- Boat trips need flexible planning
Always check real-time marine forecasts with local experts before diving or sailing.
Culture Calendar: Time Your Trip for Pasola
Sumba’s most famous ritual falls in the wet season.
Mounted warriors meet in a ritual battle tied to the lunar calendar and the harvest.
- When
- February or March, set by the lunar calendar
- Dates
- Shift every year, so always verify first
- Villages
- Praijing and Ratenggaro are worth visiting in any season
Best Time FAQ
Quick answers on timing your trip.
Plan Around the Right Season
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