Lake · Japan
Nakaumi
Lake in Tottori and Shimane prefecture, Japan
- Area
- 87.1km²
- Max depth
- 17m
- Average depth
- 8.5m
- Elevation
- 0m a.s.l.
- Shoreline
- 104km
- Volume
- 0.741km³
Nakaumi is a lake in Japan. It covers 87.1 km². On average it is 8.5 m deep, and 17 m at its deepest point. Its surface lies 0 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Nakaumi?
The water is warmest in August, around 27 °C at the surface, and coldest in January, around 7 °C. The surface averages 20 °C or more from June to October: comfortable for most swimmers.
It does not normally freeze in winter.
On the shore, afternoons reach 29 °C on average in August and 7 °C in January. The driest month is February (108 mm of rain), the wettest July (221 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (102 readings). Shallow bays and beaches are often warmer.
From above
The whole lake from space
Month by month
The year at the lake, month by month
Not a forecast: these are averages over many years. Water is the 2013–2021 average; air, rain, sun and wind are the 1991–2020 average.
Water: 2013–2021 averageClimate: 1991–2020 average
| Month | Water°C | Water high°C | Air high°C | Air low°C | Rainmm | Rainy daysdays | Sunh/day | Windkm/h |
|---|---|---|---|---|---|---|---|---|
| January | 7 | 7 | 7 | 4 | 132 | 20 | 1.8 | 26 |
| February | 7 | 8 | 8 | 4 | 108 | 15 | 2.8 | 23 |
| March | 10 | 12 | 11 | 6 | 124 | 14 | 4.3 | 23 |
| April | 15 | 17 | 16 | 10 | 116 | 11 | 5.8 | 22 |
| May | 20 | 22 | 20 | 14 | 124 | 11 | 6.1 | 19 |
| June | 24 | 26 | 24 | 19 | 182 | 14 | 4.9 | 16 |
| July | 27 | 28 | 27 | 23 | 221 | 17 | 4.6 | 17 |
| August | 27 | 28 | 29 | 24 | 125 | 14 | 6.0 | 17 |
| September | 25 | 27 | 25 | 21 | 204 | 15 | 4.5 | 19 |
| October | 20 | 23 | 20 | 16 | 138 | 12 | 4.4 | 20 |
| November | 14 | 17 | 15 | 11 | 111 | 14 | 3.1 | 22 |
| December | 9 | 11 | 10 | 6 | 154 | 19 | 1.8 | 26 |
Water: LakeTEMP (Landsat 8, 2013–2021). Air, rain, sun and wind: NASA POWER, 1991–2020 averages. A rainy day has at least 1 mm of rain. Sunshine hours are derived from measured solar radiation.
Size & depth
How big, how deep
- On average, water stays in the lake for about 4 months before flowing out.
- Its catchment drains 2,033 km² of land.
- About 79 m³ of water flow out every second, on average.
- Its shoreline is 3.1 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Nakaumi
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 9beaches and swimming spots
- —campsites
- —boat hire and water-sport clubs
- 4marinas and slipways
- —ferry piers
- 2viewpoints
- 17hotels, B&Bs and chalets
Hotel Sanada, nha, Super Hotel Yonago Ekimae and 14 more
- —fishing spots
- 61restaurants and cafés
Towns on the shore
- Yonago148,720 people
- Yasugichō38,875 people
- Sakaiminato36,324 people
Nearest airport with scheduled flights: Yonago Kitaro Airport / JASDF Miho Air Base (YGJ), 6 km in a straight line.
OpenStreetMap is built by volunteers: when a number is low, it may just mean nobody has mapped it yet.
Recent years
How each month compared
Afternoon high on the shore. The first row is the reference, the 1991–2020 average in °C; the years below show the difference from it: warmer in orange, cooler in blue.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1991–2020 average | 6.9 | 7.7 | 10.6 | 15.5 | 20.1 | 23.7 | 27.1 | 28.8 | 25.1 | 20.2 | 15.1 | 9.6 |
| 2020 | +2.7 | +1.9 | +1.6 | −1.7 | +0.1 | +0.9 | −1.6 | +1.3 | +0.5 | −0.4 | +1.1 | +0.3 |
| 2021 | +0.2 | +2.3 | +2.4 | +0.7 | ±0.0 | +0.2 | +0.9 | −0.7 | ±0.0 | +0.8 | +0.3 | +0.9 |
| 2022 | +0.3 | −1.5 | +1.2 | +1.2 | +0.5 | +1.0 | +1.7 | +0.6 | +0.7 | −0.2 | +2.0 | −0.8 |
| 2023 | +1.1 | +0.9 | +3.1 | +0.9 | +0.2 | +0.5 | +1.7 | +2.0 | +1.9 | +0.4 | +1.5 | +1.4 |
| 2024 | +1.7 | +1.3 | ±0.0 | +2.5 | +0.2 | +1.1 | +1.5 | +1.3 | +3.6 | +1.7 | +0.5 | −0.1 |
| 2025 | +0.5 | −1.6 | +0.1 | +0.2 | −0.3 | +1.6 | +2.9 | +1.6 | +2.6 | +1.2 | +0.6 | +1.4 |
+1 warmer than usual −1 cooler than usual
About these numbers
| Outline, area, depth, volume | HydroLAKES v1.0 (Messager et al. 2016) · CC BY 4.0 |
|---|---|
| Water temperature and ice | LakeTEMP v1 (Korver et al. 2024), Landsat 8 2013–2021 · CC BY 4.0 |
| Air, rain, sun, wind | NASA POWER, 1991–2020 · public domain |
| Names and description | Wikidata (Q1077275) · CC0 |
| Around the shore | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average or a count from a public dataset. Licences and methods: data sources.
