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Best time for Island Peak Trek

The best time for Island Peak Trek is spring and autumn. These two seasons are famous among trekkers who travel to the Himalayas. So, if you are wondering about the best time for Island Peak Trek, let’s find out together!

best time for island peak trek

Island Peak is a popular trekking peak in Nepal that mountaineers often climb in preparation for Mount Everest. Moreover, the gorgeous views of the snow-covered landscapes and mountains are equal to those of the winter wonderland. 

It is an isolated peak that appears like an island in a sea of ice from Dingboche, where it got its name. During peak trekking season, the route to the Imja Tse is busy with aspiring mountaineers. It is ideal for seasoned and beginners as it requires no technical skills. 

Nepal has four distinct seasons: spring, summer, autumn, and winter. The seasons highly influence the weather, climate, trail conditions, and peak climbing experience. Hence, choosing the best time for the climb is crucial. It also significantly influences the climbing conditions

Before deciding the best time to climb the Island Peak, you must learn about the seasons and their weather conditions. This article will provide you with all the information you need about the best time for the climbing season for Imja Tse. So, let us begin!

Understanding Island Peak

Geographical Overview

Island Peak, also known locally as Imja Tse, lies in the Everest region of Nepal. It is 6189 meters high and sits within the UNESCO World Heritage Site, Sagarmatha National Park. The Khumbu Himal is its parent range.  

The Island Peak is a ridge extension from the south end of Mount Lhotse Shar. As mentioned above, a vast sea of snow surrounds the peak. It lies close to the point where the Imja and Lhotse Glaciers meet. Its geographical coordinates are 27° 55′ 14.84″ N latitude and 86° 56′ 6.58″ E longitude.

The trail to Island Peak is challenging, as its terrains are rough and rugged with steep slopes. Likewise, trekkers must cross ice slopes, crevasses, glaciers, and moraines. The unpredictable weather adds to the challenges. 

Island Peak Trek takes 14 to 18 days, depending on the route. The distance from Lukla, the starting point of the trek, to Everest Base Camp, is 40 to 47 km (25 to 29 miles). The trek is an arduous journey but also a rewarding one.  

Historical Significance

Eric Shipton, the leader of the Mount Everest expedition team, gave the peak its name in 1951. Later, in 1953, the British expedition team climbed Island Peak’s southwest summit as a practice for Everest. Tenzing Norgay, Charles Wylie, Charles Evans, Alfred Gregory, and seven Sherpas were part of the team. 

Swiss climber Hans-Rudolf Von Guten and two Sherpas reached the summit in 1956, and many mountaineers attempt to climb the peak. Island Peak has become an acclimatization and a crucial training ground for higher Himalayan climbing expeditions. It has cultural significance to the local Sherpas of the Everest region. Most prefer to climb the peak as Mount Everest preparation rather than taking Everest Base Camp Trek.  

Trekking Seasons in Nepal

Spring Season

The spring season, March to May, is the peak trekking season and best time to visit Nepal. Thousands of travelers visit Nepal at this time for trekking and climbing activities. Spring is the best time to climb Island Peak Trek. The weather is favorable, with a low precipitation level. Hence, the trails are dry and in good condition for trekking.  

The best part about trekking in Spring is that the landscape thrives with color and vibrancy. Moreover, the Himalayan flora and fauna are the most active. The trails of Island Peak go through a dense forest of rhododendrons, which are in full bloom in springtime. En route, you can also see numerous blooming Himalayan wildflowers. Likewise, there is a chance that you will encounter rare wildlife along the trekking trails.  

The days are warm and sunny in spring, with 9 hours of daylight. The average daytime temperature above 4000 meters altitude is around 17 degrees Celsius. Meanwhile, the nighttime temperature can drop to -10 degrees Celsius. The temperature at Island Peak summit is always below freezing.       

Autumn Season

The next best and peak season for trekking in Nepal is autumn, which falls from September to November. It is also another ideal time for climbing Island Peak in Nepal. The stable weather, crisp air, and clear sky make it a popular time to trek. As a result, the trails are busy with trekkers. It is common to come across fellow trekkers along the route.  

Due to the monsoon, the lower region can experience rainfall during early September. However, the rain washes away dust and impurities in the atmosphere and landscapes. Therefore, visibility is excellent in autumn. The vegetation looks lusciously green, and the views of the mountain vistas are crystal clear.

The average daytime temperature of high regions above 4000 meters is around 15 degrees Celsius. However, the temperature drops significantly at night and in the mornings. The minimum temperature can reach -15 degrees Celsius.   

Winter and Summer (Off-Season)

Winter and summer are the off-seasons for trekking, and we do not recommend these two seasons to climb Island Peak Trek. The weather and climatic conditions are not ideal for trekking in these seasons, and most trekkers also avoid them. 

Winter, from December to February, brings heavy snowfall and blizzards to the higher regions of Nepal. The temperature begins to drop and gets especially cold at higher altitudes. Heavy snow can block the high mountain passes, and the weather at the summit can get extremely harsh. The maximum temperature above 4000 meters is around 8 degrees Celsius, while the minimum can be around -15 degrees Celsius. Temperature above 6000 meters is unpredictable. Island Peak during winter is more challenging than in spring and autumn.

Summer or monsoon season, which runs from June to August, brings its own set of challenges. There is heavy rainfall all over the country, while the temperature is hot and humid. Rain clouds obstruct the views of the surrounding scenery and mountains. The maximum temperature above 4000 meters altitude is around 20 degrees Celsius, and the minimum is around -2 degrees Celsius. Due to rainfall, the trails are slippery and wet.     

Best Time for Island Peak Trek by Month

Take a look at this detailed month-by-month analysis of optimal timing for Island Peak Trek: 


The month is unsuitable for the Island Peak expedition or other high-altitude treks. Heavy snowfall may block the high mountain passes, and there are high risks of avalanches. The temperature of Island Peak at nighttime can drop up to -22 degrees Celsius. However, many extreme adventure seekers choose January for trekking.  


As February begins, the days slowly become longer and clearer. However, during early and mid-February, there is still quite a lot of snowfall. The temperature above 5000 meters can reach up to -26 degrees Celsius. There is still a risk of strong winds and frostbite. However, as the month progresses, it starts to get warmer.    


March is the transition period when winter changes to spring. The days are brighter and sunnier, and the flora and fauna become active. Hence, the green and luscious vegetation, blooming rhododendron forests, and colorful Himalayan wildflowers adorn the trekking trails. The temperature above 4000 meters is around 15 to 17 degrees Celsius at daytime and around -10 degrees Celsius at nighttime. It is a suitable time for trekking and climbing adventure in Nepal. 


As April begins, the days become more pleasant. The temperature gradually becomes warmer, but the mornings and evenings become cooler. It is an excellent time for trekking and hiking as the weather is stable and visibility is great. The temperature is similar to March. The daytime temperature ranges between 15 to 17 degrees Celsius and -10 degrees Celsius at nighttime.  


More trekkers flock to Nepal during May for trekking and hiking. The month is famous for its warm weather, clear sky, and comfortable trekking conditions. There is a minimum chance of rainfall or snowfall in May. The trails are full of luscious vegetation and gorgeous mountain views. The temperature during May ranges between 15 to 17 degrees Celsius at daytime, while the nighttime temperature is around -10 degrees Celsius. 


The monsoon enters Nepal in June and brings heavy rainfall across the country. The days become gloomy, with a lot of rainfall and a few thunderstorms. Hence, trekking during June is more challenging. The trails are wet and slippery, with a risk of landslides. The average temperature ranges between 20 to 35 degrees Celsius. Meanwhile, the nighttime temperature is around 20 degrees Celsius. 


July also falls during the monsoon and summer seasons. Like June, this month also receives a lot of rainfall. Hence, the trails are wet and muddy and not suitable for trekking. The risk of landslides and mudslides persists. Likewise, the visibility is poor, and gloomy clouds obstruct the view. The daytime temperature is around 20 to 35 degrees Celsius, while the nighttime temperature is around 20 degrees Celsius. 


August is the last month of summer and also peak monsoon time. Therefore, there is heavy rainfall with overcast skies. The visibility is extremely poor. The trails are unsafe for trekking, and there is a high risk of landslides. However, the hot temperature begins to drop slowly. The average temperature ranges around 15 degrees Celsius. Despite the heavy rainfall, the humidity level is still high. 


The summer season transitions into autumn as September begins. It is the beginning of the peak trekking season in Nepal. However, there is still quite a lot of rainfall during early September. As the month progresses, the sky becomes clearer, and the monsoon leaves the country. It is the best time to enjoy the views of the Himalayas. The daytime temperature ranges from 5 to 15 degrees Celsius. The nighttime temperature can drop to -5 degrees Celsius. 


The weather in October is delightful and favorable for trekking. It is neither scorching hot nor freezing cold and favorable time to embark in peak adventure. The rain from the monsoon cleanses the atmosphere and surrounding vegetation. Therefore, the whole landscape looks clean and vibrant. The daytime temperature ranges around 12 degrees Celsius. However, the nighttime temperature at higher elevations can drop to -20 degrees Celsius.


November is another excellent time to trek in Nepal. It is the beginning of the pre-winter season. The days are still sunny and warm, but they get slightly chillier as November progresses. You can still enjoy pleasant trekking during the daytime, with temperatures ranging from 5 to 10 degrees Celsius. However, the nighttime temperature drops to -20 degrees Celsius. 


In December, winter begins in Nepal and is off-season for trekking. Most tea houses and lodges also close for winter. Experienced trekkers can still trek at this time with proper preparation. The weather at higher altitudes starts to become harsh and frigid. The temperature below 4000 meters is around 12 to -5 degrees Celsius. Meanwhile, temperatures above 4000 meters range from 8 to -15 degrees Celsius.  

Preparation for the Trek

Physical and Mental Preparation

Island Peak Climb is an Alpine PD+ grade-level peak, meaning it is slightly difficult. The trek is physically and mentally demanding. Unlike Mera Peak, which is another popular trekking peak in the Everest region, it does not require technical skill. Most mountaineers climb Island Peak to prepare for the Everest climb. However, any trekkers, including beginners with good physical fitness levels, can join the trek. Prior experience is undoubtedly helpful for climbing the peak. 

Physical preparation will help to make your trek experience more comfortable. It is best to start preparing 3 or 4 months before your trek. You can undertake exercises and training that boost your physical strength, stamina, and endurance. Cardiovascular exercises such as running, jogging, cycling, swimming, etc., help increase your strength and stamina. 

You can also hike while carrying some weight on your back. Likewise, you can also undertake rock climbing or learn basic mountaineering skills. These skills will be helpful during the Island Peak Trek and make your journey less strenuous. 

While physical preparation is crucial for the trek, mental preparation is vital. The weather in the Himalayas is harsh and cruel. They can change at any time, and predicting them is impossible. The remote trails, the sense of isolation, and the physical strain can stress out many trekkers. 

Therefore, trekkers should come mentally prepared. Research the trek and its challenges and familiarize yourself with the route. Physical and mental preparation plays a massive role in the success of your trek. 

Gear and Equipment Guide


  • Long-sleeve shirts and hiking shirts
  • Lightweight trekking pants
  • Waterproof/ windproof jacket and pants
  • Thermal or insulating layers
  •  Fleece jackets and trousers
  • Expedition grade down jacket (rental available in Kathmandu)
  • Gloves (Liner, lightweight, and thick insulating winter gloves)
  • Warm hat or wide-brimmed hat
  • Moisture-wicking socks 
  • Gaiter
  • Comfortable hiking boots
  • Mountaineering boots


  • Backpack (40 to 50 liters)
  • Trekking pole
  • Headlamp/ flashlight
  • Thermal water bottle
  • Sleeping bag (should be able to withstand up to -15 temperature)
  • Ice Screw
  • Rope
  • Ice Axe
  • Crampons
  • Carabiners (locking and nonlocking) 

Personal and extra 

  • Toiletries, Sunscreens, and lotions
  • Light-weight multi-tools
  • Power bank and adapter
  • Sunglass with UV protection

Island Peak Itinerary

Take a look at our 16 Days Island Peak climbing Itinerary: 

  • Day 1: Arrival in Kathmandu (1,350 m/ 4,429 ft)
  • Day 2: Fly from Kathmandu (1,350m/ 4,429 ft) to Lukla (2,860 m/ 9,383 ft) and trek to Phakding (2,610 m/ 8,563 ft)
  • Day 3: Trek from Phakding (2,610m/ 8,563 ft) to Namche Bazaar (3,440 m/ 11,286 ft)
  • Day 4: Acclimatization day at Namche Bazaar
  • Day 5: Trek from Namche Bazaar (3,440 m/ 11,286 ft) to Tengboche (3,867 m/ 12,687 ft)
  • Day 6: Trek from Tengboche (3,867 m/ 12,687 ft) to Dingboche (4,410m/ 14,469 ft)
  • Day 7: Trek from Dingboche (4,410m/ 14,469 ft) to Chhukung (4,730 m/ 15,518 ft)
  • Day 8: Acclimatization day at Chhukung
  • Day 9: Trek from Chhukung to Island Peak Base Camp (5,090 m/ 16,699 ft)
  • Day 10: Trek from Island Peak Base Camp to the Summit of Island Peak (6,189 m/ 20,305 ft) and Back to Base Camp (5,090 m/ 16,699 ft)
  • Day 11: Trek from Island Peak Base Camp (5,090 m/ 16,699 ft) to Pangboche (4,000m/ 13,123 ft)
  • Day 12: Trek from Pangboche (4,000m/ 13,123 ft) to Namche Bazaar (3,440 m/ 11,286 ft)
  • Day 13: Trek from Namche Bazaar (3,440 m/ 11,286 ft) to Lukla (2,860 m/ 9,383 ft)
  • Day 14: Fly from  Lukla (2,860 m/ 9,383 ft) to Kathmandu (1,350 m/ 4,429 ft)
  • Day 15: Final Departure  

Safety and Sustainability

Here are a few tips and best practices for safe and sustainable trekking:

  • Prepare yourself physically and mentally for the trek. Undertake exercises and training a few months before the trek to enhance your physical stamina, strength, and endurance. Research about the trek and its challenges to build mental resilience.
  • Choose the right time to trek. Autumn and spring have the best weather and climates for trekking, but the routes are busier. If you want to experience quieter trails and enjoy the serene atmosphere, off-season is the right time. However, trekking in off-seasons comes with additional challenges.  
  • Research and plan your trek properly. Gather information about the trek and make preparations. This will help you make informed decisions and make your trek more enjoyable. 
  • Hire an experienced and licensed guide through a government-registered trekking agency. They will guide you safely during the trek and offer valuable insights and knowledge about the region. They will ensure your safety and provide logistic support. Guides offer valuable climbing guide which helps in successful climb of Island Peak. 
  • Respect the local culture. Nepalese society is still conservative, so be mindful of local customs and traditions and dress modestly. Always ask before taking photos of people, monasteries, and religious sites.
  • At Hillary Step Treks, we promote sustainable tourism and practice the “Leave no Trace” principle. During the trek, avoid littering and dispose of them properly. Follow responsible trekking practices to minimize ecological footprint.      


Spring and autumn seasons are incredible times for a pleasant trekking experience. These two seasons have stable weather, mild temperatures, and excellent visibility. Therefore, you can enjoy the magnificent scenery and mountain vistas on the trek. Island peak climb is possible in winter and summer. However, we highly suggest these two seasons for seasoned trekkers as the harsh weather conditions makes it a difficult climb. 

Determining the best time for trekking is crucial for a safe and enhanced trekking experience. It makes your trek more enriching and memorable. We hope our article answered the question of the best time for Island Peak Trek. Thank you for reading!

Hillary Treks

My name is Hillary. Since completing the Government Guide Training from Nepal's Ministry of Tourism and Civil Aviation (KEEP and HRA), I have been a specialist in mountain trekking and peak climbing. With specific expertise in the Nepal, Tibet, and Bhutan regions, I have now been a trekking guide and tour operator in Nepal, and across the Himalayas, since 2012.

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