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Japan JapanIsland

Tsushima Island

694 km² rising to 649 m out of the Korea Strait.

When to go

Tsushima Island seen from space, cut out from the sea (Sentinel-2)
Tsushima
N 5 km

Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.

In numbers

694km²

Area

883km

Coastline

649m

Highest point

Mount Yatate

31,457

People

27°C

Warmest sea

August

44km

To the mainland

When to go to Tsushima Island

Best for the beach from July to October.

The sea is warmest in August (27 °C) and coolest in March (14 °C). Comfortable swimming (21 °C or more): from July to October.

Sea temperature (the water level) Air: night low to afternoon high Wet days Best months

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 Nagasaki, Japan

Tsushima Island is an island in Japan. It covers 694 km², with 883 km of coastline. Its highest point, Mount Yatate, rises to 649 m. About 31,457 people live on it. The nearest mainland is 44 km away.

Read more on Wikipedia

Getting there

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 Tsushima Island.

  • 23beachesMiuda Beach and 22 more
  • 5viewpointsManzeki Bridge and 4 more
  • 4lighthouses
  • 14ferry terminalsIzuhara Port, Port Hitakatsu, Izuhara Port Perry Terminal and 11 more
  • 1marinasTakashiki Marina
  • 142named peaksYatate Yama, Mt. Mokkoku, Odakemitake and 139 more
  • 1waterfallsNarutaki Falls
  • 3castles and fortsKaneda Castle, Shimizuyama Castle
  • 8ruins and archaeological sitesNaval Gun Fort (1885), Sino-Russian War Fort, gun emplacement and 5 more
  • 4campsitesAsobay Park Camp, Miuta Camp Site and 2 more
  • 17hotels, guesthouses and apartments
  • 37restaurants, cafés and bars

Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.

Cross-checked with our atlases

Tsushima Island in our other atlases

Everything Coastya, Peakyas, Lakeyas and Cascadyas know about what lies inside Tsushima Island, each with its own numbers.

  • 2beaches and covesCoastya
  • 6mountainsPeakyas
  • Highest point

    558m

    Mount Ariake

    according to Peakyas

  • Beach with the warmest sea

    27.3°C

    Shimoana Ura

    sea in the warmest month · according to Coastya

2 beaches

on Coastya, the beach atlas

  1. Shimoana Uracove27.3°C
  2. Shitazaki Uracove26.7°C

Open Coastya ↗

6 mountains

on Peakyas, the mountain atlas

  1. Mount Ariake558m
  2. Mount Shimizu
  3. Gongen Yama
  4. Tatera Yama
  5. Mount Mitake
  6. Mount Yatate

Open Peakyas ↗

The shape of the land.

On average the island stands 118 m above the sea. 84 % of it is below 200 m.

  • 25 %0–50 m
  • 59 %50–200 m
  • 16 %200–500 m
  • <1 %500–1,000 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.

Tsushima Island694 km²
Madeira Island742 km²
Tenerife2,038 km²

20 km

All outlines drawn to the same scale (Natural Earth and OpenStreetMap).

Towns on the island

  • Tsushima28,502 people

Month by month

The weather on the island.

JanFebMarAprMayJunJulAugSepOctNovDec
Afternoon high (°C)91012161922262825211611
Night low (°C)66913162024262319138
Sea (°C)161414151821242726232018
Rain (mm)5273109157176221312233208907155
Wet days8811111114171713898
Sun h/day4.34.85.66.26.44.75.06.14.85.44.74.4
Wind (km/h)272524231918192023232326

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.

JanFebMarAprMayJunJulAugSepOctNovDec
2020+0.9+0.9+0.9+0.4+0.1+0.7−1.4−0.2−0.5−0.9+0.2−0.1
2021+0.1+1.2+1.0+1.6+0.7+1.4+1.8+0.2+0.6+2.2+0.4+0.4
2022±0.0−0.4+0.5+1.5+1.5+0.7+1.9+1.0+0.9+0.9+0.7+0.7
2023+0.2+0.7+1.8+1.7+0.9+1.4+0.9+1.1+1.6+0.4+0.9+0.7
2024+0.5+0.7+0.8+1.6+1.5+1.2+0.3+2.9+3.3+1.9+1.2−0.2
2025−0.3−0.8−0.7−0.4−0.3+0.1+2.4+2.0+3.1+2.8+1.5+1.0

+1 warmer than usual −1 cooler than usual

Photos

Seen by visitors.

Top-Mount-Shiroyama-and-Aso-Bay-Tsushima
irisgazer · Public domain
Happy Science building in Tsushima-1
Immanuelle · CC BY 4.0
Happy Science building in Tsushima-3
Immanuelle · CC BY 4.0

About these numbers

Names, area, populationWikidata (Q52051) · CC0
Outline© OpenStreetMap contributors · ODbL
Sea temperatureNOAA OISST v2.1 · 1991–2020
ClimateNASA POWER · 1991–2020
Relief, 3D modelCopernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA
Beaches, ports, lighthouses, trails© OpenStreetMap contributors · ODbL
TownsGeoNames · CC BY 4.0
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons
Beaches, mountains, lakes and waterfallsCoastya, Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; NOAA OISST

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.

beachesCoastyaFind your beach: sea temperature, sun and swimming month by month.Visit
lakesLakeyasEvery lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit
mountainsPeakyasEvery summit in 3D: summit weather, the 0 °C line, huts and trails.Visit
waterfallsCascadyasEvery waterfall: height, flow month by month and when it roars.Coming soonVisit
islandsIslandyasEvery island from the sea up: size, sea temperature, ferries and 3D.You are here
riversRiveryasEvery river from source to sea: the journey, the flow and the basin in numbers.Visit canyonsCanyonyasEvery canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Visit