Niseko Grand Hirafu 7-Day Snow Forecast

Niseko Grand Hirafu Long-Range Snow Forecast Updated today

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Updated 20 March 2026 15:43 PDT

Long-Range Snow Forecast for Niseko Grand Hirafu

Long-range (14 to 45 days) from 21 March.

For Forecast detail, see below.

Niseko Grand Hirafu Snow Forecast Highlights

When will there be fresh snow in Niseko Grand Hirafu?

Niseko Grand Hirafu Snow Forecast Highlights - JMA
Snowfall prediction at mid-mountain (2,638ft)
Next Snow Expected	21 March
Next Snow Amount	4in
Next 48 Hours	4in
Next 7 Days	5in

Long-range Snow Outlook for Niseko Grand Hirafu

Snowfall

Snow Line

Max 46°F
Min 23°F

5in New Snow

Snow Line from 3,156ft to resort level (984ft).

Powder Alert!

Powder Alarm issued 20 March 2026 16:50 PDT

Powder Possible :- 6in of Fresh Snow is forecast for Niseko Grand Hirafu over the next 2 days.

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Niseko Grand Hirafu Long-Range (2 weeks+) Snow Forecast Outlook

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.

16 Day Weather and Snow Forecast for Niseko Grand Hirafu from OpenMeteo(JMA)
	Snow and Weather	Temp Town
Sat 21	4in New Snow Heavy snow showers. Snow falling to resort level (984ft).	Max 31°F Min 26°F
Sun 22	Fair.	Max 45°F Min 25°F
Mon 23	New Snow Snow showers at altitude, rain showers below. Snow Line from 3,156ft to 1,995ft, with rain below.	Max 46°F Min 28°F
Tue 24	Light snow showers.	Max 37°F Min 25°F
Wed 25	Clear sky.	Max 41°F Min 23°F
Thu 26	Clear sky.	Max 46°F Min 29°F
Fri 27	Fair.	Max 43°F Min 32°F

This Snow Forecast for Niseko Grand Hirafu, 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 Niseko Grand Hirafu, 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.

Niseko Grand Hirafu Snow Forecast updated at 15:43 PDT, next update expected 18:00 PDT.

Ensemble forecast for Niseko Grand Hirafu, Japan at 984ft

Daily Mean Temperature (yellow line is control)

Daily Total Precipitation (blue line is control)

What are Forecast Ensembles ? Multiple forecasts from running the same weather model with slightly different inputs. The prominent line (the 'control') is the model output from standard inputs, the thinner lines are the variations. Plotted together, they show a range of possible outcomes; the closer they are, the higher the confidence.

How to read Long Range Ensemble Forecasts

These forecasts are from ECMWF EC46, a long-range, low-resolution (area) model. They may not accurately reflect local conditions and should be read as area forecasts, indicating whether the coming weeks are likely to be warmer, colder, wetter, or drier than average.

What to look for?

Temperatures trending downward at the same time as precipitation spikes upward... means snow!

Lines close together indicate a high confidence, while wider spreads signal uncertainty.

Snow Forecast near Niseko Grand Hirafu

Snow Forecasts for Ski Resorts near Niseko Grand Hirafu
Ski Area	48 Hr	7 Day
Niseko Annupuri	5in	6in
Niseko	5in	5in
Niseko Village/Higashiyama	5in	5in
Kiroro	6in	6in
Niseko Hanazono	4in	4in
Niseko Kokusai Moiwa	4in	5in
Rusutsu	4in	4in

Snow Reliability

Niseko Grand Hirafu enjoys exceptional snow reliability, with an average snowfall of over 15 meters each season. Snow depths typically range from 1 to 3 meters, encouraging skiers to check J2Ski for the latest snow reports.

Off-Piste Safety in Niseko Grand Hirafu

Before skiing or snowboarding off-piste in Niseko Grand Hirafu, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.