Next 3 days weather summary:Light rain (total 6.0mm), mostly falling on Sun afternoon. Warm (max 27°C on Sat afternoon, min 23°C on Sat night). Wind will be generally light. | Days 4-6 weather summary:Moderate rain (total 11.0mm), heaviest on Thu night. Warm (max 28°C on Wed afternoon, min 21°C on Thu night). Wind will be generally light. | |||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  | | |  | | | | | | | | |  | |
clear | clear | some clouds | some clouds | t-storm risk | rain shwrs | some clouds | some clouds | clear | some clouds | some clouds | some clouds | some clouds | clear | clear | some clouds | t-storm risk | mod. rain | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — | — | — | — | 5 | 6 |
max °C | 26 | 27 | 24 | 27 | 27 | 24 | 25 | 25 | 24 | 26 | 26 | 24 | 27 | 28 | 24 | 26 | 24 | 23 |
min °C | 24 | 25 | 23 | 26 | 25 | 23 | 25 | 25 | 23 | 25 | 25 | 23 | 25 | 26 | 22 | 24 | 24 | 21 |
chill °C | 24 | 25 | 23 | 26 | 25 | 23 | 25 | 25 | 23 | 25 | 25 | 23 | 25 | 26 | 22 | 24 | 24 | 21 |
Humid % | 64 | 65 | 76 | 56 | 70 | 75 | 74 | 70 | 73 | 61 | 61 | 76 | 74 | 54 | 77 | 80 | 85 | 87 |
Freeze m | 5400 | 5550 | 5450 | 5450 | 5400 | 5350 | 5400 | 5550 | 5600 | 5500 | 5600 | 5650 | 5550 | 5600 | 5800 | 5600 | 5550 | 5400 |
 | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — |
 | — | 7:25 | — | — | 7:25 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:23 | — |
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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