Biwako Valley Snow Report and Forecast
Snow Forecast for Biwako Valley
This is the Snow Forecast for Biwako Valley, Japan for 17 days from 10 December.
Updated 10 December 2025 10:39 GMT.
Forecast times for Biwako Valley are in Japan Time (Asia/Tokyo).
For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Biwako Valley.
J2Ski - Sign In for a long-range snow forecast, with more weather detail.
Biwako Valley Snow Forecast Highlights
When will there be fresh snow in Biwako Valley?
| Next Snow Expected | 12 December |
|---|---|
| Next Snow Amount | 23cm 9in |
| Next 48 Hours | 23cm 9in |
| Next 7 Days | 25cm 10in |
Forecast for today in Biwako Valley
Max 4℃ 39°F
Min 2℃ 35°F
Valley temperatures from an overnight low of 2℃ 35°F to daytime highs around 4℃ 39°F
Temperature at BaseTemp at Base
Wed
10
Snow unlikely
Rain showers first, light rain then clear sky, fair later.
Powder Alert!
Updated 10 December 2025 13:47 GMT
Powder Possible :- 23cm 9in of Fresh Snow is forecast for Biwako Valley over the next 2 days.
Biwako Valley Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
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| Wed 10 | Thu 11 | Fri 12 | Sat 13 | Sun 14 | Mon 15 | Tue 16 | |
|---|---|---|---|---|---|---|---|
| Wind | NW F2 | SW F2 | W F3 | ||||
| 1,174m 3,852ft | 4℃ 39°F
| 11℃ 51°F
 | 1℃ 33°F
 +23cm +9in
| 2℃ 36°F
| 5℃ 41°F
| 0℃ 33°F
 +1cm +1in
| 3℃ 38°F
 |
| NW F2 | SW F2 | W F3 | |||||
| 1,057m 3,468ft | 4℃ 39°F
| 11℃ 51°F
| 1℃ 33°F
+23cm +9in
| 3℃ 37°F
| 6℃ 43°F
| 1℃ 34°F
+1cm +1in
| 4℃ 39°F
|
| NW F2 | SW F2 | W F3 | |||||
| 940m 3,084ft | 4℃ 39°F
| 11℃ 51°F
| 1℃ 33°F
+23cm +9in
| 4℃ 38°F
| 7℃ 44°F
| 2℃ 35°F
+1cm
| 5℃ 41°F
|
| Snow Line | 940m 3,084ft | 940m 3,084ft | 940m 3,084ft | ||||
| Max Town | 4℃ 39°F | 11℃ 51°F | 1℃ 33°F | 4℃ 38°F | 7℃ 44°F | 2℃ 35°F | 5℃ 41°F |
| Min Town | 2℃ 35°F | 2℃ 35°F | -3℃ 27°F | -3℃ 27°F | 1℃ 34°F | 1℃ 33°F | 0℃ 31°F |
This table shows the average forecast snowfall, the maximum temperature, and expected general weather at resort, lower and upper mountain levels. For daily forecast details, see below.
Snow Forecast near Biwako Valley
| Ski Area | 48 Hr | 7 Day | We | Th | Fr | Sa | Su | Mo | Tu |
|---|---|---|---|---|---|---|---|---|---|
| Happo One | 9cm 4in | 48cm 19in | |||||||
| Myoko Suginohara | 9cm 3in | 34cm 13in | |||||||
| Hakuba 47 | 9cm 4in | 27cm 11in | |||||||
| Tsugaike Kogen | 5cm 2in | 25cm 10in | |||||||
| Myoko Ikenotaira | 5cm 2in | 18cm 7in | |||||||
| Togari Onsen | 7cm 3in | 18cm 7in |
Snow Reliability
Biwako Valley typically sees a snow depth of around 1 to 2 meters throughout the season, with reliable snowfall from December to March. For the latest snow conditions, check updates on J2Ski.
Understanding and predicting Snow Conditions in Biwako Valley
Here are our tips for making the most of a trip to Biwako Valley, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Biwako Valley, but like any mountain, snow conditions change throughout the season, from day to day, and even from hour to hour.
Whether you’re sticking to the marked pistes or venturing off-piste, here’s what you need to know:
Pistes (Groomers) or Off-Piste
These can be a world apart, regarding snow conditions, even ignoring the difference between the natural terrain features to be found off-piste and the generally controlled surfaces and slopes of a pisted (groomed) run.
- Piste Conditions can range from fresh powder to firm, icy surfaces, particularly after warm spells or a busy day on the mountain with the passage of many skiers.
- Off-Piste Conditions are far more variable. Wind and sun can quickly transform fresh snow into wind crust or slushy layers, whilst cold weather can preserve stashes of powder many days after a snowfall.
WARNING - skiing off-piste (out-of-bounds) at Biwako Valley is uncontrolled and un-marked slopes are not made safe (from avalanche risk) or patrolled. Always check local advice, know the Avalanche Risk Level, ski with safety kit (and know how to use it), and never ski alone.
Analyzing Weather and Snowfall Forecasts
Whilst no forecast can tell you exactly how snow conditions in Biwako Valley will develop, checking the forecast regularly should give you an idea of what to expect.
New snowfall can bring fresh powder and refresh the surfaces of pisted runs. Powder can be tracked out quickly at busy times, but in less crowded and shaded areas, fresh snow can linger for days.
Changes in weather conditions, such as milder temperatures, rain or wind, can degrade snow quality. Conversely, cold, stable weather can preserve conditions for extended periods.
Predicting Future Snow Quality
Regularly check our snow and weather forecasts for Biwako Valley for changes that may affect snow quality. Forecast snowfall depth and recent snowfall are good indicators of what to expect.
Use historical data and recent snow reports to understand past snow conditions and anticipate future changes.