Biwako Valley Snow Report and Forecast
Snow Forecast for Biwako Valley
This is the Snow Forecast for Biwako Valley, Japan for 16 days from 13 November.
Updated 13 November 2025 04:38 PST.
For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Biwako Valley.
There is some snow in the long-range forecast (8 to 16 days from today)!
J2Ski - Sign In to see the full long-range snow forecast (out to 16 days, with more weather detail).
Biwako Valley Snow Forecast Highlights
When will there be fresh snow in Biwako Valley?
| Next Snow Expected | 22 November |
|---|---|
| Next Snow Amount | 2in |
| Next 48 Hours | - |
| Next 7 Days | 3in |
Forecast for today in Biwako Valley
Max 55°F
Min 45°F
Valley temperatures from an overnight low of 45°F to daytime highs around 55°F
Temperature at BaseTemp at Base
Thu
13
Snow unlikely
Clear spells first, clear sky then fair, rain showers later.
Biwako Valley has no new snow forecast in the next 48 hours.
Biwako Valley Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
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Biwako Valley 7-Day Snow Forecast Overview
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| Thu 13 | Fri 14 | Sat 15 | Sun 16 | Mon 17 | Tue 18 | Wed 19 | |
|---|---|---|---|---|---|---|---|
| Wind | W F3 | W F2 | |||||
| 3,852ft | 55°F
| 47°F
| 49°F
| 56°F
| 53°F
 +1in
| 30°F
+1in
| 39°F
 |
| W F3 | SW F2 | ||||||
| 3,468ft | 55°F
| 47°F
| 49°F
| 56°F
| 60°F
| 37°F
 | 47°F
|
| W F3 | SW F2 | ||||||
| 3,084ft | 55°F
| 47°F
| 49°F
| 56°F
| 62°F
| 38°F
| 49°F
|
| Snow Line | 3,084ft | 3,084ft | |||||
| Max Town | 55°F | 47°F | 49°F | 56°F | 62°F | 38°F | 49°F |
| Min Town | 45°F | 40°F | 41°F | 47°F | 38°F | 33°F | 40°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.
Biwako Valley Medium-Range (7-Day) Snow Forecast Detail
Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.
Max 55°F
Min 45°F
Valley temperatures from an overnight low of 45°F to daytime highs around 55°F
Temperature at BaseTemp at Base
Thu
13
Snow unlikely
Clear spells first, clear sky then fair, rain showers later.
Max 47°F
Min 40°F
Valley temperatures from an overnight low of 40°F to daytime highs around 47°F
Temperature at BaseTemp at Base
Fri
14
Snow unlikely
Clear spells early, then fair later.
Max 49°F
Min 41°F
Valley temperatures from an overnight low of 41°F to daytime highs around 49°F
Temperature at BaseTemp at Base
Sat
15
Snow unlikely
Clear sky.
Max 56°F
Min 47°F
Valley temperatures from an overnight low of 47°F to daytime highs around 56°F
Temperature at BaseTemp at Base
Sun
16
Snow unlikely
Clear sky first, cloudy then clear spells, fair later.
Max 62°F
Min 38°F
Valley temperatures from an overnight low of 38°F to daytime highs around 62°F
Freeze-thaw conditions up high.
Temperature at BaseTemp at Base
Snowfall
Snow Line
Mon
17
up to 1in New Snow
Clear spells early, then cloudy later.
Snow falling to resort level.
Max 38°F
Min 33°F
Valley temperatures from an overnight low of 33°F to daytime highs around 38°F
Temperature at BaseTemp at Base
Snowfall
Snow Line
Tue
18
up to 1in New Snow
Clear spells early, then clear sky later.
Snow falling to resort level.
Max 49°F
Min 40°F
Valley temperatures from an overnight low of 40°F to daytime highs around 49°F
Temperature at BaseTemp at Base
Wed
19
Snow unlikely
Fair early, then cloudy later.
This Snow Forecast for Biwako Valley, Japan gives the predicted Snowfall and Freezing Levels for the next week.
The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Biwako Valley, on any given trail or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.
Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.
Biwako Valley Snow Forecast updated at 04:38 PST, next update expected imminently.
Snow Forecast near Biwako Valley
| Ski Area | 48 Hr | 7 Day | Th | Fr | Sa | Su | Mo | Tu | We |
|---|---|---|---|---|---|---|---|---|---|
| Hakuba 47 | - | 5in | |||||||
| Happo One | - | 5in | |||||||
| Tsugaike Kogen | - | 5in | |||||||
| Myoko Ikenotaira | - | 2in | |||||||
| Myoko Suginohara | - | 1in | |||||||
| Togari Onsen | - | - |
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.