Sumbawa Besar in Winter
In winter (June, July and August), Sumbawa Besar sees average daytime highs around 30°C and overnight lows near 22°C, with 21 mm of rain over about 5 wet days across the season. It is the 2nd-warmest season and the driest season of the year.
Across winter, daytime highs hold fairly steady around 30°C. The sky is clear or mostly clear about 50% of the time across winter, and the air most often feels muggy.
Winter is Sumbawa Besar's best season of the year to visit on our travel score. Sumbawa Besar has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Sumbawa Besar's year-round climate.
- Avg daytime high
- 30°C
- 2nd-warmest season
- Avg overnight low
- 22°C
- Rainfall
- 21 mm
- 5 wet days
- Avg wind
- 10 km/h
- Travel score
- 6.3
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Sumbawa Besar in Winter
Across winter, daytime highs hold fairly steady around 30°C.
A typical winter day in Sumbawa Besar reaches about 30°C and drops to 22°C overnight. The warmest of the three months is August, the coolest August.
How winter really feels in Sumbawa Besar
Once humidity and wind are folded in, winter brings about 26 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Sumbawa Besar weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 24° | 338 | 29.1 | 12.4 | 3.0 |
| Feb | 29° / 24° | 317 | 26.4 | 12.3 | 3.1 |
| Mar | 29° / 24° | 235 | 25.3 | 12.1 | 3.4 |
| Apr | 30° / 24° | 106 | 17 | 11.8 | 4.2 |
| May | 30° / 23° | 31 | 7 | 11.6 | 5.4 |
| Jun | 30° / 23° | 14 | 3.3 | 11.5 | 6.1 |
| Jul | 29° / 22° | 6 | 1.6 | 11.6 | 6.5 |
| Aug | 30° / 22° | 1 | 0.4 | 11.7 | 6.3 |
| Sep | 31° / 23° | 5 | 1.2 | 12 | 5.5 |
| Oct | 32° / 24° | 22 | 4.8 | 12.2 | 4.7 |
| Nov | 31° / 24° | 94 | 14.7 | 12.4 | 3.7 |
| Dec | 30° / 24° | 264 | 26.6 | 12.5 | 3.1 |
Cloud cover in Winter
The sky is clear or mostly clear about 50% of the time across winter.
Chance of precipitation in Winter
Sumbawa Besar gets around 21 mm of rain over 5 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 30 min in early June to 11 h 48 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 5.2 kWh/m².
Hazard calendar for Sumbawa Besar
None of Sumbawa Besar's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Sumbawa Besar sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Sumbawa Besar's monsoon runs December–March, when most of the year's rain falls.
Is winter a good time to visit Sumbawa Besar?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Sumbawa Besar for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Sumbawa Besar in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Sumbawa Besar sees daytime highs around 30°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.
Sea temperature near Sumbawa Besar in Winter
The nearest coast averages about 28°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 14 km away) is warmest in November at about 30°C and coldest in August near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 29 | 29 | 29 | 30 | 29 | 29 | 28 | 28 | 28 | 29 | 30 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 28 | Warm |
| Aug | 28 | Warm |
| Sep | 28 | Warm |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 29 | Tropical |
UV index in Sumbawa Besar in Winter
Clear-sky midday UV across winter averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sumbawa Besar peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 15 | 15 | 13 | 11 | 10 | 9 | 12 | 13 | 13 | 11 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 15 | Extreme |
| Apr | 13 | Extreme |
| May | 11 | Extreme |
| Jun | 10 | Very high |
| Jul | 9 | Very high |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 13 | Extreme |
Air quality in Sumbawa Besar in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Sumbawa Besar is worst in October — around 30 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (March, 10 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 10 | 10 | 10 | 12 | 12 | 12 | 15 | 23 | 30 | 21 | 13 |
| Level | Moderate | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 10 | Good |
| Mar | 10 | Good |
| Apr | 10 | Good |
| May | 12 | Good |
| Jun | 12 | Good |
| Jul | 12 | Moderate |
| Aug | 15 | Moderate |
| Sep | 23 | Moderate |
| Oct | 30 | Moderate |
| Nov | 21 | Moderate |
| Dec | 13 | Moderate |
Where is Sumbawa Besar?
Sumbawa Besar sits at 8.5°S, 117.4°E, 14 m above sea level, in Indonesia. The nearest listed city is Taliwang, 68 km away.
Topography around Sumbawa Besar
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sumbawa Besar.
Within 3 km, the terrain around Sumbawa Besar has only modest variations in elevation — a maximum elevation change of 115 m around an average of 32 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 948 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,795 m.
The land around Sumbawa Besar is covered by grassland (33%), trees (24%) and artificial surfaces (23%) within 3 km, trees (31%), water (25%) and grassland (22%) within 16 km, and water (54%) and trees (32%) within 80 km.
Indonesia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,060
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 30%
- of population, 2024
- Homicide rate
- 0.3
- per 100k, 2022
- Road deaths
- 11.3
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 471
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sumbawa Besar (-8.4932°, 117.4202°, elevation 14 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.