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Osa Weather (Next 3 days): The snow forecast for Osa is: Moderate rain (total 11.0mm), heaviest on Tue night. Freeze-thaw conditions (max 10°C on Tue night, min -1°C on Sun night). Winds increasing (calm on Mon night, strong winds from the SSW by Tue night).
Osa Weather (Days 4-6): Moderate rain (total 10.0mm) heaviest on Wed afternoon, then becoming colder with a dusting of snow on Thu night. Freeze-thaw conditions (max 7°C on Wed afternoon, min -6°C on Thu night). Winds increasing (calm on Wed night, strong winds from the WNW by Thu night).
| Resort | Snow Depth | Temp. (°C) | Wind (km/h) | Weather | ||
|---|---|---|---|---|---|---|
| Top Lift: | 1 |  | ||||
| Bottom Lift: | 3 |  |
Latest snow reports near Osa:
Sun 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | | |  |  |  | | | | | | | | |
light snow | some clouds | cloudy | some clouds | clear | cloudy | some clouds | rain shwrs | mod. rain | light rain | light rain | light rain | light snow | light snow | light snow | light snow | light snow | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | 4 | 7 | 3 | 4 | 2 | 1 | — | — | — | — | |
max °C | 4 | 1 | 1 | 2 | 3 | 8 | 9 | 10 | 9 | 7 | 6 | 4 | 2 | -1 | -4 | -4 | -4 |
min °C | 2 | -1 | 1 | 1 | 2 | 5 | 6 | 7 | 8 | 6 | 4 | 2 | -1 | -6 | -5 | -5 | -4 |
-3 | -6 | -3 | -1 | 0 | 3 | 1 | 3 | 4 | 4 | 1 | -3 | -8 | -16 | -14 | -13 | -11 | |
87 | 84 | 87 | 68 | 46 | 35 | 36 | 58 | 98 | 98 | 98 | 94 | 88 | 84 | 84 | 83 | 83 | |
1350 | 850 | 950 | 1150 | 2000 | 2400 | 2450 | 2700 | 2650 | 2750 | 2050 | 1400 | 1100 | 300 | 250 | 400 | 400 | |
 | — | — | 7:13 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:16 | — | — |
 | 5:02 | — | — | 5:04 | — | — | 5:04 | — | — | 5:05 | — | — | 5:05 | — | — | 5:06 | — |
Moderate rain (total 11.0mm), heaviest on Tue night. Freeze-thaw conditions (max 10°C on Tue night, min -1°C on Sun night). Winds increasing (calm on Mon night, strong winds from the SSW by Tue night).
Moderate rain (total 10.0mm) heaviest on Wed afternoon, then becoming colder with a dusting of snow on Thu night. Freeze-thaw conditions (max 7°C on Wed afternoon, min -6°C on Thu night). Winds increasing (calm on Wed night, strong winds from the WNW by Thu night).
Latest snow reports near Osa:
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 13 Dec 2025 |
| Snow Alerts | Create Alert |
0.1 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
1.5 | Powder days Fresh snow, limited sun, any wind. |
0.5 | Bluebird days Average snow, mostly sunny, light wind. |
The above table gives the weather forecast for Osa at the specific elevation of 865 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Osa. To access the weather forecasts for the other elevations, use the tab navigation above the table. For a wider view of the weather, check out the Weather Map of Japan.
Click here to read further information on freezing levels and how we forecast our temperatures.
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