worldweather

Weather in Sumba - 14-day forecast

Detailed weather forecast for Sumba, Indonesia: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Sumba
today☀️ 27°💧 0.1 mm
Sun🌧️ 29°💧 0.1 mm
Mon🌤️ 30°💧 0.3 mm
Tue🌤️ 30°💧 0.3 mm
Wed🌧️ 30°💧 0.1 mm
Thu☁️ 29°💧 0.4 mm
Fri☁️ 30°💧 0.6 mm
Sat☁️ 31°night 20°
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Saturday 5 Sept in Sumba, the forecast high is 27°C. Typical daytime temperatures at this time of year range from 30°C to 32°C, so it will be exceptionally cool. It is cooler than 99% of similar days.

27°Cexceptionally cool
usually 30°C–32°C
cooler than 99% of similar days
night: exceptionally cool rain: typical rainfall wind: lighter than usual
29°Cexceptionally cool
usually 30°C–32°C
cooler than 97% of similar days
night: exceptionally cool rain: typical rainfall wind: exceptionally light
30°Cexceptionally cool
usually 30°C–32°C
cooler than 90% of similar days
night: exceptionally cool rain: more rain than usual wind: exceptionally light
30°Cexceptionally cool
usually 30°C–32°C
cooler than 91% of similar days
night: exceptionally cool rain: more rain than usual wind: exceptionally light
30°Cexceptionally cool
usually 30°C–32°C
cooler than 92% of similar days
night: exceptionally cool rain: typical rainfall wind: exceptionally light
29°Cexceptionally cool
usually 31°C–32°C
cooler than 96% of similar days
night: exceptionally cool rain: more rain than usual wind: exceptionally light
30°Cexceptionally cool
usually 31°C–32°C
cooler than 91% of similar days
night: exceptionally cool rain: more rain than usual wind: stronger than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
25°30°35° 1981: 32°C1982: 31°C1983: 31°C1984: 30°C1985: 31°C1986: 31°C1987: 31°C1988: 32°C1989: 32°C1990: 31°C1991: 31°C1992: 32°C1993: 30°C1994: 31°C1995: 32°C1996: 31°C1997: 31°C1998: 32°C1999: 31°C2000: 33°C2001: 32°C2002: 30°C2003: 31°C2004: 31°C2005: 32°C2006: 31°C2007: 30°C2008: 32°C2009: 32°C2010: 30°C2011: 31°C2012: 32°C2013: 30°C2014: 31°C2015: 31°C2016: 33°C2017: 31°C2018: 32°C2019: 31°C2020: 32°C2021: 31°C2022: 31°C2023: 32°C2024: 32°C2025: 32°C 2026 forecast: 29°C current forecast 29°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 31°C by day. The coolest year was 2013 (30°C) and the warmest was 2000 (33°C). The current forecast averages 29°C - lower than in 100% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Sumba

Sumba - 14-day weather forecast infographic

Day-by-day forecast for Sumba

Saturday5 September 2026
☀️27°clear sky
sunrise 06:00 · sunset 17:58 · night 19° · evening 25° · rain 0.13 mm · humidity 46% · wind 5 m/s · clouds 6%
Sunday6 September 2026
🌧️29°light rain
sunrise 06:00 · sunset 17:58 · night 19° · evening 23° · rain 0.13 mm · humidity 41% · wind 3 m/s · clouds 88%
Monday7 September 2026
🌤️30°a few clouds
sunrise 05:59 · sunset 17:57 · night 19° · evening 22° · rain 0.25 mm · humidity 40% · wind 3 m/s · clouds 22%
Tuesday8 September 2026
🌤️30°scattered clouds
sunrise 05:59 · sunset 17:57 · night 20° · evening 23° · rain 0.3 mm · humidity 40% · wind 2 m/s · clouds 38%
Wednesday9 September 2026
🌧️30°light rain
sunrise 05:58 · sunset 17:57 · night 21° · evening 24° · rain 0.13 mm · humidity 40% · wind 3 m/s · clouds 23%
Thursday10 September 2026
☁️29°overcast clouds
sunrise 05:58 · sunset 17:57 · night 20° · evening 26° · rain 0.42 mm · humidity 41% · wind 4 m/s · clouds 100%
Friday11 September 2026
☁️30°broken clouds
sunrise 05:57 · sunset 17:57 · night 20° · evening 27° · rain 0.57 mm · humidity 38% · wind 8 m/s · clouds 66%
Saturday12 September 2026
☁️31°overcast clouds
sunrise 05:56 · sunset 17:57 · night 20° · evening 26° · humidity 31% · wind 8 m/s · clouds 100%
Sunday13 September 2026
🌤️31°scattered clouds
sunrise 05:56 · sunset 17:57 · night 20° · evening 27° · rain 0.12 mm · humidity 30% · wind 8 m/s · clouds 39%
Monday14 September 2026
☀️32°clear sky
sunrise 05:55 · sunset 17:57 · night 19° · evening 27° · humidity 28% · wind 9 m/s · clouds 3%
Tuesday15 September 2026
🌤️32°a few clouds
sunrise 05:54 · sunset 17:57 · night 19° · evening 27° · rain 0.15 mm · humidity 29% · wind 8 m/s · clouds 24%
Wednesday16 September 2026
☀️31°clear sky
sunrise 05:54 · sunset 17:57 · night 19° · evening 28° · rain 0.18 mm · humidity 29% · wind 7 m/s · clouds 2%
Thursday17 September 2026
🌤️32°a few clouds
sunrise 05:53 · sunset 17:57 · night 20° · evening 28° · humidity 31% · wind 9 m/s · clouds 12%
Friday18 September 2026
🌤️32°scattered clouds
sunrise 05:53 · sunset 17:56 · night 20° · evening 27° · humidity 24% · wind 10 m/s · clouds 36%
Saturday19 September 2026
☁️32°overcast clouds
sunrise 05:52 · sunset 17:56 · night 20° · evening 27° · humidity 23% · wind 7 m/s · clouds 89%
Sunday20 September 2026
🌤️32°scattered clouds
sunrise 05:51 · sunset 17:56 · night 19° · evening 28° · humidity 29% · wind 6 m/s · clouds 26%

UV index in Sumba - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTSumba03681111+8.9UV VERY HIGHtoday, daily maxSPF 50, long sleeves and shade between 10:00 and16:00.Unprotected fair skin may burn in about 20 min9Sat5.099Sun6.099Mon7.099Tue8.098Wed9.099Thu10.099Fri11.099Sat12.099Sun13.099Mon14.099Tue15.099Wed16.099Thu17.099Fri18.0910Sat19.099Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Sumba is 9 (very high) - unprotected fair skin can burn in about 20 minutes. SPF 50, long sleeves and shade between 10:00 and 16:00.

Sea temperature - Sumba

Water today
26°C
Week avg
27°C
Waves today
1.1 m
How's the water?
warm
16-day sea temperature forecast:
5.09 26°C6.09 27°C7.09 27°C8.09 27°C9.09 27°C10.09 27°C11.09 27°C12.09 27°C13.09 27°C
Average sea temperature through the year:
Jan 30°CFeb 30°CMar 30°CApr 30°CMay 29°CJun 28°CJul 27°CAug 27°CSep 27°COct 29°CNov 30°CDec 31°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Upcoming public holidays in Indonesia: Christmas Day — 25 December · New Year's Day — 1 January · Good Friday — 26 March.

Nearby and related places

LiquiçáSameSumbawaSumatraTimorLombokAlorJakarta

FAQ - Sumba weather

What is the weather like in Sumba today?
Today it is about 27° during the day and 19° at night, clear sky.
How far ahead can I check the forecast for Sumba?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.