Niseko Grand Hirafu 7-Day Snow Forecast

Niseko Grand Hirafu Long-Range Snow Forecast Updated today

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Updated 21 March 2026 05:40 NZDT

Long-Range Snow Forecast for Niseko Grand Hirafu

Long-range (14 to 45 days) from 20 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 (804m)
Next Snow Expected	20 March
Next Snow Amount	3cm
Next 48 Hours	14cm
Next 7 Days	15cm

Long-range Snow Outlook for Niseko Grand Hirafu

Snowfall

Snow Line

Max 8℃
Min -6℃

15cm New Snow

Snow Line from 977m to resort level (300m).

Powder Alert!

Powder Alarm issued 21 March 2026 10:48 NZDT

Powder Possible :- 14cm 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
Fri 20	3cm New Snow Light snow showers. Snow falling to resort level (300m).	Max 3℃ Min -1℃
Sat 21	11cm New Snow Heavy snow showers. Snow falling to resort level (300m).	Max 0℃ Min -3℃
Sun 22	Fair.	Max 8℃ Min -4℃
Mon 23	up to 1cm New Snow Light snow showers at altitude, light rain showers below. Snow Line from 977m to 362m, with rain below.	Max 8℃ Min -1℃
Tue 24	Fair.	Max 3℃ Min -4℃
Wed 25	Fair.	Max 5℃ Min -6℃
Thu 26	Fair.	Max 7℃ Min -2℃

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 piste 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 05:40 NZDT, next update expected imminently.

Ensemble forecast for Niseko Grand Hirafu, Japan at 300m

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.

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Snow Forecast near Niseko Grand Hirafu

Snow Forecasts for Ski Resorts near Niseko Grand Hirafu
Ski Area	48 Hr	7 Day
Niseko Annupuri	17cm	19cm
Kiroro	16cm	16cm
Niseko	14cm	15cm
Niseko Kokusai Moiwa	15cm	15cm
Niseko Village/Higashiyama	14cm	15cm
Niseko Hanazono	11cm	11cm
Rusutsu	10cm	11cm

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.