August 11 is statistically one of the best days of the year in Sumba. With minimal rain risk (3%) and pleasant highs of 30°C, it's ideal for outdoor adventures. You'll find plenty of company in Sumba this month as tourism activity remains quite robust.
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Essential Travel Info for Sumba
Currency
IDR
Rp Indonesian rupiah
Language
Indonesian
Driving
Left side
Connect
Since Sumba is far from other major citi...
Safety
High Safety
GPI: 1.8
Sumba Weather Forecast for August 11
"Warm & Sunny. Expect average highs of 30.2°C. 3% chance of rain."
What to Wear in Sumba in August
Based on historical data for August 11, Sumba typically experiences temperatures between 22.4°C and 30.2°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (3% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Sumba
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
30.2°C
Daytime Peak
Average Low
22.4°C
Nighttime Low
Feels Like
36.3°C
🔥 Heat index effect
Rain Chance
3%
Avg 0.2mm if it rains
Cloud Cover
45%
Overcast
Pressure
1013.2 hPa
Low volatility
Sumba Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 94% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 40 min to burn
Type III-IV
🟡 60 min to burn
Type V-VI
🟢 100 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
24.8°C
Humid/Sticky
Heat Index
36.3°C
Feels hotter
😐 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Marine Conditions
Jellyfish Warning
High water temps may attract jellyfish swarms.
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Indonesia
Flight Traffic
Busy
78/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~7
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sumba
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:12
☀️ Noon
12:05
🌇 Sunset
17:58
⏱️ Daylight
11h 45m
Wind Speed
17.7 km/h
Gentle breeze
Sunshine
10.9 hrs
Direct Sun (Cloud-free)
Humidity
73%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Sumba
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Sumba
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Active seismic zone. Multiple earthquakes per year.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Sumba on August 11 averages 30.2°C with a 3% precipitation probability. Wedding/Outdoor Event Score: 99/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Sumba Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
August 4
29.8°C • 3% rain
Score
100
August 5
29.8°C • 2% rain
Score
100
August 6
29.8°C • 2% rain
Score
100
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 11) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Sumba Worth Visiting on August 11?
Planning a trip to Sumba on August 11? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 30.2°C with a 3% historical precipitation risk.
✈️ Travel Logistics: Approximately 7 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 11 vaccinations are recommended for Indonesia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 26.8°C (tropical bath). Wave conditions are generally fun waves with heights around 0.5m.
📊 Historical Extremes: The hottest August 11 recorded in the last 30 years saw temperatures hit 32.3°C in 2025, while the coldest dropped to 21.2°C in 2024.