Next 3 days weather summary:Heavy rain (total 123.0mm), heaviest during Sun morning. Warm (max 21°C on Mon afternoon, min 17°C on Sat morning). Wind will be generally light. | Days 4-6 weather summary:Light rain (total 8.0mm), mostly falling on Tue morning. Warm (max 23°C on Tue afternoon, min 20°C on Tue night). Wind will be generally light. | |||||||||||||||||
Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  | |  |  |  | |  |  | |  | | | | |
heavy rain | light rain | light rain | heavy rain | heavy rain | heavy rain | heavy rain | t-storm risk | some clouds | rain shwrs | t-storm risk | rain shwrs | some clouds | t-storm risk | clear | some clouds | rain shwrs | some clouds | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 26 | 3 | 5 | 31 | 25 | 13 | 18 | 2 | — | 1 | 2 | 1 | — | 2 | — | — | 2 | — |
max °C | 18 | 19 | 19 | 19 | 19 | 20 | 20 | 21 | 20 | 22 | 23 | 21 | 23 | 22 | 21 | 23 | 23 | 21 |
min °C | 17 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 19 | 21 | 22 | 20 | 22 | 22 | 20 | 22 | 23 | 21 |
chill °C | 17 | 19 | 19 | 19 | 18 | 19 | 20 | 20 | 19 | 21 | 22 | 20 | 22 | 22 | 20 | 22 | 23 | 21 |
Humid % | 98 | 91 | 99 | 97 | 99 | 95 | 99 | 90 | 95 | 87 | 81 | 95 | 82 | 90 | 86 | 72 | 77 | 80 |
Freeze m | 4750 | 4750 | 4950 | 4900 | 5050 | 5200 | 5000 | 5150 | 5300 | 5100 | 5200 | 5300 | 5300 | 5400 | 5400 | 5250 | 5250 | 5200 |
 | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — |
 | — | 7:28 | — | — | 7:28 | — | — | 7:27 | — | — | 7:27 | — | — | 7:27 | — | — | 7:27 | — |
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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