Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
3,269km²
Area
567km
Coastline
36m
Highest point
30°C
Warmest sea
December
404km
To the mainland
When to go to Yamdena Island
Best for the beach from August to September.
The sea is warmest in December (30 °C) and coolest in August (26 °C). You can swim comfortably all year (21 °C or more).
Averages 1991–2020. Sea: NOAA OISST, the water within 35 km of the coast. Air, rain and sun: NASA POWER. Best months weigh warm afternoons (23–30 °C), sea of 24 °C or more and few wet days.
Island in Tanimbar Islands Regency, Maluku Province, Indonesia
Yamdena Island is an island in Indonesia. It covers 3,269 km², with 567 km of coastline. Its highest point rises to 36 m. The nearest mainland is 404 km away.
Getting there
- Karel Sadsuitubun Airport (LUV)nearest airport with scheduled flights · 239 km in a straight lineCar hire at DPS airport (Kuta, Badung)Discover Cars · Affiliate link↗
- FerriesBanda - Saumlaki, Saumlaki - Larat (Elat), Tepa - Saumlaki, Kalabahi - Saumlaki
- 404 km from the mainlanddistance to the nearest continental coast
- From August to Septemberbest months to go (from 30 years of averages)
Plan the trip
Ferries, stays and things to do
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
On the island
What you find on Yamdena Island.
- 2ferry terminalsSaumlaki, Saumlaki Port
- 3named peaksBotanipnyue, Riatu, Lainbuar
Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.
The shape of the land.
On average the island stands 69 m above the sea. 99 % of it is below 200 m.
- 40 %0–50 m
- 59 %50–200 m
- 1 %200–500 m
Share of the island's area in each altitude band, from the Copernicus DEM (30 m, read at 30–240 m on large islands).
Size, for real
Next to islands you may know.
50 km
All outlines drawn to the same scale (Natural Earth and OpenStreetMap).
Towns on the island
- Saumlaki12,916 people
Month by month
The weather on the island.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon high (°C) | 29 | 29 | 29 | 30 | 29 | 28 | 28 | 28 | 30 | 32 | 33 | 31 |
| Night low (°C) | 26 | 26 | 26 | 26 | 26 | 25 | 24 | 24 | 24 | 26 | 27 | 27 |
| Sea (°C) | 29 | 29 | 29 | 29 | 29 | 28 | 26 | 26 | 27 | 28 | 29 | 30 |
| Rain (mm) | 281 | 222 | 223 | 210 | 194 | 127 | 50 | 17 | 16 | 22 | 58 | 208 |
| Wet days | 28 | 26 | 26 | 22 | 22 | 18 | 12 | 4 | 4 | 6 | 14 | 26 |
| Sun h/day | 5.0 | 5.4 | 5.6 | 6.2 | 5.9 | 5.6 | 6.3 | 7.8 | 8.5 | 8.7 | 8.1 | 6.0 |
| Wind (km/h) | 19 | 19 | 15 | 16 | 22 | 26 | 26 | 25 | 22 | 18 | 13 | 13 |
Averages 1991–2020 for the ~55 km NASA POWER cell over the island; the sea from NOAA OISST.
Recent years
Warmer and cooler years at sea.
Each month's sea temperature compared with its 1991–2020 average, in degrees.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | +0.8 | +0.8 | +0.6 | +0.4 | +0.1 | +0.3 | +0.4 | +1.0 | +0.6 | +0.3 | +0.5 | +0.3 |
| 2021 | +0.2 | +0.1 | +0.4 | +0.3 | ±0.0 | +0.4 | +0.6 | +1.1 | +0.7 | +1.0 | +0.5 | +0.3 |
| 2022 | −0.6 | +0.2 | +0.5 | +0.7 | +1.1 | +1.5 | +0.9 | +0.8 | +1.1 | +1.2 | +0.7 | −0.1 |
| 2023 | −0.2 | −0.7 | +0.1 | ±0.0 | +0.1 | +0.2 | +0.8 | +0.6 | −0.4 | −0.5 | −0.1 | −0.2 |
| 2024 | +0.1 | +0.1 | +0.4 | +0.8 | +0.7 | +0.4 | +0.6 | +0.6 | +0.5 | +0.7 | +0.7 | ±0.0 |
| 2025 | +1.0 | +0.4 | +0.7 | +0.4 | +0.3 | +0.6 | +0.6 | +0.6 | +0.4 | +0.6 | ±0.0 | −0.1 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.

Nearby
More islands nearby.
About these numbers
| Names, area, population | Wikidata (Q431318) · CC0 |
|---|---|
| Outline | © OpenStreetMap contributors · ODbL |
| Sea temperature | NOAA OISST v2.1 · 1991–2020 |
| Climate | NASA POWER · 1991–2020 |
| Relief, 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Beaches, ports, lighthouses, trails | © OpenStreetMap contributors · ODbL |
| Towns | GeoNames · CC BY 4.0 |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.

