The 2026/27 season is planned to open on 25 Dec (the resort’s announcement; it moves with the snow). The snowfall below is a model figure and does not mean the slopes are skiable.
This season is planned to run until 7 Mar (the resort’s announcement).
A weather-model figure, worked out the same way for every ski area, and lower than what actually falls. Use it to compare ski areas, not against the resort’s own totals. How we measure →
This season so far (1 Nov to 9 Nov): 5 cm. The average for these dates is under 10 cm, so we do not give a percentage yet. The average is over twelve winters on the same weather model. Across Japan →
Updated: 10 Nov 2026, 12:15
| Date | Weather | Snow (cm) | Low / high (°C) | Wind (km/h) |
|---|---|---|---|---|
| Tue 10 Nov | Partly cloudy | 0 | −4 to −1 | 12 |
| Wed 11 Nov | Cloudy | 0 | −4 to 3 | 8 |
| Thu 12 Nov | Drizzle | 0 | 0 to 13 | 14 |
| Fri 13 Nov | Cloudy | 0 | 4 to 11 | 23 |
| Sat 14 Nov | Cloudy | 0 | 4 to 11 | 12 |
| Sun 15 Nov | Drizzle | 0 | 3 to 7 | 7 |
| Mon 16 Nov | Drizzle | 0 | −1 to 5 | 22 |
The five add up to the 100-point Powder Score: more fresh snow, more on the way and colder air all push it up. How we measure
Hotel, hot spring and ski slopes are gathered into a single resort. From the top of the slopes you can see Komagatake, the Onuma and Konuma lakes, Uchiura Bay and Mount Yotei. The hot-spring bathhouse, fed straight from the source, also takes day visitors. Sources: gp-onuma.com (sources read 12 Oct 2026; an AI draft the site operator has not yet checked)
Counted from the runs and lifts drawn on OpenStreetMap, within the boundary of the ski area. These are not the resort’s own published figures.
56% of the vertical on the runs descends to the north or east; plenty of the terrain faces the sun as well, so the lean is modest.
See past trail maps on Skimap.org ↗
Source: OpenSkiMap (© OpenStreetMap contributors, ODbL 1.0). How finely ski areas are drawn varies by region, so treat the counts as indicative. Vertical is the difference between the highest and lowest points of the mapped runs and lifts.
Footage remains the copyright of each operator. JAPANSNOWLINE neither stores nor redistributes it.
Hakodate and Onuma webcams & snow report — all 2 ski areas →
Modelled from weather data the same way at all 3,069 ski areas we cover. These are not the resort’s own published figures.
The tick marks the median across every Japanese ski area we measure. All four bars run the same way — longer is better.
The quality score leaves out how much snow falls (it uses temperature, frequency, rain and wind).
Within 50 km in a straight line. Ski areas in the same weather-model cell (about 30 km across) get the same figure.
| Ski area | Distance | Seasonal snowfall | World rank |
|---|---|---|---|
| Hakodate Nanae Snowpark | 14.0 km | 153 cm | 1621 |
| Yakumo Choei Ski Area | 38.0 km | 179 cm | 1330 |
| Furusatonomori Ski Area | 39.0 km | 159 cm | 1553 |
| Kaminokuni Chomin Ski Area | 41.0 km | 240 cm | 800 |
Compare side by side with Hakodate Nanae Snowpark and Yakumo Choei Ski Area →
The most snow falls in January. March brings 78% of January’s snowfall. That is a gentler fall than the median for ski areas in Japan (52%). For skiing, though, the amount matters more than the share: March brings 39 cm, less than the median of 46 cm.
Across the 12 winters measured, the average is 169 cm, and 6 of them fell short of it. The leanest was 2015/16 with 113 cm; the biggest was 2017/18 with 246 cm (2.2 times as much).
Snowfall each winter (December–March total). The dashed line is the average; the numbers mark the leanest and the biggest winter.
Total snowfall from December to March recorded at the 森 weather station — 6.5 km from this ski area, 134 m below its mid-slope.
| Three-season average | 381 cm |
| 2023/24 | 380 cm |
| 2024/25 | 468 cm |
| 2025/26 | 295 cm |
The figure calculated on this page is 187 cm.
A weather station is not a ski slope. We picked one at a similar elevation, but it stands in a valley or a village. More snow falls on the mountain above it. We have not tried to guess how much more.
Source: Japan Meteorological Agency historical records
6 hot spring sources with published analyses lie within 5 km of this ski area, nearest first (the hottest is 49.3 °C).
| Source | Distance | Temperature | pH | Type |
|---|---|---|---|---|
| 森赤井川グリンピア大沼井 | 0.9 km | 35.3℃ warm | 8.3 mildly alkaline | — |
| 駒ヶ岳寿観光駒ヶ岳R1 | 2.5 km | 42℃ hot | 8.1 mildly alkaline | — |
| 駒ヶ岳ワールド牧場2号井 | 3.2 km | 40.8℃ warm | 8.7 alkaline | alkaline simple |
| 西大沼西武ゴルフ場R-3 | 4.5 km | 42.2℃ hot | 8 mildly alkaline | simple |
| 西大沼じゅんさい沼温泉R1号 | 4.5 km | 31℃ lukewarm | 7.5 mildly alkaline | — |
| 森赤井川日本石油東大沼荘 | 4.7 km | 49.3℃ hot | 7.8 mildly alkaline | simple |
These are analyses of hot spring sources, not a list of baths you can visit. They date from 1910 to 2005, many from decades ago, so today’s temperature and chemistry may differ. Names are as recorded in Japanese. Temperature and pH bands follow Japan’s standard for analysing hot springs.
Source: processed from the hot spring analysis data in the Geothermal Information Database (GRES-DB), Geological Survey of Japan, AIST
Within 20 km in a straight line, nearest first. Some lie over a pass that is closed in winter.
| Place | Type | Distance |
|---|---|---|
| Ōnuma Quasi-National Park大沼国定公園 | Nature | 6 km |
| Ōnuma大沼 (七飯町) | Nature | 7.2 km |
| Hokkaidō Koma-ga-take北海道駒ヶ岳 | Mountain | 9 km |
| オニウシ公園 | Park | 10.6 km |
| 濁川温泉 | Hot spring town | 17.6 km |
| Roadside station Shikabe Kanketsusen park道の駅しかべ間歇泉公園 | Park | 19.4 km |
Chosen from the places most read about on Wikipedia, favouring those with an English article. Based on the Japanese Wikipedia lists of sights in each prefecture, as compiled in travel-log-data (CC BY-SA 4.0). English names from Wikidata (CC0). The content of this section is available under CC BY-SA 4.0.
Checked on the official site (26 Oct 2026) · Source. “Not checked” means we have not looked yet. Compare with other ski areas →
Contains advertising. Property names and Rakuten Travel’s booking pages are in Japanese.
2 properties on Rakuten Travel lie within about 3 km of this ski area. The table shows the nearest 2 with a listed price.
| Property (links to Rakuten Travel) | Lowest listed (per person, tax incl.) | Rating | Distance | Getting there |
|---|---|---|---|---|
| リブマックスリゾート函館 グリーンピア大沼 | ¥3,000 | 4.55／5 688 reviews | 0.9 km | 道央道 大沼公園ICより約2分・大沼公園駅より車で10分(予約制無料送迎バス有) |
| ペンション 森の中の小さな家 | ¥5,000 | 4.60／5 105 reviews | 2.3 km | JR大沼公園駅からお車で7分/函館市内からお車で50分 |
Prices are the lowest Rakuten Travel lists; a property name, or “Pick dates and guests” above, shows prices and rooms for your dates.
Contains advertising. Property names and Rakuten Travel’s booking pages are in Japanese. · Property data by Rakuten Travel (Supported by Rakuten Developers)
6 places within 12 km of the slopes, as mapped on OpenStreetMap, many of them small inns and pensions. Many are not on booking sites — open the name for the website or the map.
Accommodation data: OpenStreetMap
Other booking sites: Booking.com ↗ · Agoda ↗ · Rakuten Travelad ↗
“ad” marks links that pay us a commission if you book. Links without it are not affiliated.
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