A Guide to Summer in Niseko — Rivers, Mountains & the Green Season

Summer in Niseko shows a completely different face from winter.

Niseko is world-famous for its powder snow — but once the snow melts, the "green season" turns out to be something special, too. Cool breezes, deep-green mountains, crystal-clear rivers. In this guide, we've gathered the best ways to play in Niseko in summer, area by area and activity by activity. Even if it's your first visit, you'll come away with a clear picture of how to spend your day.

Why summer in Niseko feels so good

Let's start with the weather.

Niseko's summers are famously comfortable. Through the green season (roughly July to October), the temperature rarely climbs above 30°C, making it a perfect escape from the humid heat of mainland Japan.

Days are crisp and sunny; mornings and evenings are cool. It's just the right climate whether you want to get active outdoors or simply relax and take in the scenery.

Compared with the busy winter crowds, summer is quiet and unhurried — a charm all its own.

Play in the water — rafting & SUP on the Shiribetsu River

The most popular summer activity in Niseko is rafting on the Shiribetsu River.

The Shiribetsu is said to have some of the clearest water in all of Japan. You climb into a large rubber raft and work together to ride the river downstream.

The rafting season usually runs from late April through around October.

• In spring (April–May), snowmelt makes the current fast and thrilling — the "spring course."
• From June onward, the water calms into the gentler "summer course."

Summer-course tours are often suitable even for younger children, so they're great for families. Jump from the raft into the river, splash one another — getting wet is half the fun in summer.

If you'd rather enjoy the water more quietly, SUP (stand-up paddleboarding) is popular too. You glide along the calm stretches, standing on a board.

* Courses, prices, and age limits vary by operator. Please check each tour company's official website for the latest details.

Climb a mountain — Mt. Yotei and Niseko Annupuri

Summer is also hiking season in Niseko. Choose your mountain to match your fitness and your plans.

For the serious hiker: Mt. Yotei

Mt. Yotei — nicknamed "Ezo-Fuji" — stands 1,898 m tall and is the symbol of the Niseko area.

There are several trails; the Kutchan (Hirafu) course from the Hirafu side is the classic one. The climb takes around 5 hours, with a round trip of more than 8 hours — a full-day, serious hike.

It calls for an early start and proper gear and preparation. If it's your first time, plan conservatively and don't overreach.

For an easier climb: Niseko Annupuri

If you'd like to enjoy a summit view a little more easily, Niseko Annupuri (1,308 m) is a great choice.

From the Goshiki Onsen side, the climb takes about an hour and a half. At the top, a magnificent view of Mt. Yotei rising right in front of you is the reward.

Many people round off the day with a soak at Goshiki Onsen on the way down.

See Niseko from the sky — zipline and hot-air balloon

You can enjoy summer Niseko from above, too.

In the Hanazono area, the HANAZONO ZIPFLIGHT is one of the longest ziplines in the world. The total run reaches 2,591 m, and the longest section, "MACH3," runs 1,700 m at speeds topping 110 km/h. Flying over the forest like the wind is something you can only feel here.

For a quieter float through the air, try a hot-air balloon ride in the Higashiyama area of Niseko Town. In the clear early-morning air, you rise slowly up from the ground.

More ways to enjoy summer

Niseko's summer offers a wonderful range of choices.

• Cycling & mountain biking: ride forest trails or peaceful roads with views of Mt. Yotei.
• Golf: courses dotted around the area let you play in cool air, often at reasonable rates.
• Flowers & scenery: moss phlox in early summer, highland blooms in midsummer. Views framed by Mt. Yotei beg to be photographed.
• BBQ & camping: a slow day out in nature is its own kind of luxury.

Play in the river in the morning, rest at a café or on the mountain at midday, watch the scenery from a flower field in the evening — in summer Niseko, a day like that is yours for the taking.

Before you go — what to bring and a few tips

Finally, a few small tips for enjoying summer Niseko comfortably.

✅ Mornings and evenings get chilly, so bring a light jacket. Sunscreen, a hat, and insect repellent are good to have. You'll get wet or muddy on many activities, so pack a change of clothes — and if you're hiking, don't forget rain gear and proper shoes.

Popular activities can fill up with reservations, especially on summer weekends. If there's something you really want to do, booking early is the safe bet.

The weather changes quickly, so checking the forecast on the morning of your trip helps you plan your day.

Come to Niseko this summer

Riding a river in a cool breeze, climbing a mountain, flying through the sky — summer Niseko is packed with a kind of "play" that's quite different from winter.

Come and experience Niseko in its snow-free season.

You can check current events and recommended spots here.

— Niseko Hub Editorial Team