Next 3 days weather summary:Heavy rain (total 22.0mm), heaviest during Mon afternoon. Warm (max 27°C on Sun morning, min 22°C on Sat night). Wind will be generally light. | Days 4-6 weather summary:Light rain (total 6.0mm), mostly falling on Wed night. Warm (max 27°C on Tue afternoon, min 21°C on Wed night). Winds decreasing (fresh winds from the S on Thu afternoon, light winds from the SSW by Thu night). | |||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | |  |  | | | | |  | | |  | |  |  | |
rain shwrs | t-storm risk | t-storm risk | some clouds | t-storm risk | clear | clear | t-storm risk | t-storm risk | clear | clear | some clouds | some clouds | some clouds | rain shwrs | rain shwrs | light rain | light rain | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 1 | 6 | 3 | — | 3 | — | — | 6 | 3 | — | — | — | — | — | 1 | 2 | 1 | 2 |
max °C | 25 | 25 | 23 | 27 | 25 | 24 | 27 | 26 | 24 | 26 | 27 | 23 | 25 | 25 | 22 | 23 | 22 | 21 |
min °C | 25 | 24 | 22 | 25 | 24 | 23 | 25 | 24 | 22 | 25 | 26 | 23 | 25 | 23 | 21 | 22 | 22 | 21 |
chill °C | 25 | 24 | 22 | 25 | 24 | 23 | 25 | 24 | 22 | 25 | 26 | 23 | 25 | 23 | 21 | 22 | 22 | 21 |
Humid % | 73 | 82 | 80 | 70 | 80 | 85 | 75 | 71 | 83 | 72 | 63 | 72 | 62 | 66 | 73 | 78 | 77 | 84 |
Freeze m | 5050 | 5150 | 5250 | 5150 | 5250 | 5200 | 5200 | 5200 | 5150 | 5100 | 5200 | 5250 | 5150 | 5250 | 5300 | 5250 | 5150 | 5050 |
 | 5:35 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — |
 | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — |
SnowProGo pro and carve into:
Avalanche information: Japan Avalanche Network
Latest snow reports near Osa:
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 13 Mar 2026 |
| Snow Alerts | Create Alert |
0.0 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.0 | Powder days Fresh snow, limited sun, any wind. |
0.0 | 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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