The best time to trek to Everest Base Camp is autumn, from late September to late November, when skies are clearest and the trail is dry. Spring, from March to May, is the strong second choice with warmer nights and rhododendron blooms. Avoid the June–September monsoon, when cloud, rain and leeches dominate the lower Khumbu.
What is the best month to trek to Everest Base Camp?
October is the single best month on the Everest Base Camp Trek. The monsoon has cleared the air, daytime highs in the lower villages sit around 12–15 °C, and the probability of a multi-day storm is low. The trade-off is company: October is the busiest month on the trail, and lodges in Namche Bazaar and Dingboche fill quickly. Booking your teahouse beds and Lukla flights several months ahead for 2026 is the difference between a smooth trek and a scramble for beds.
If you want October's stability with thinner crowds, aim for the first ten days of November or the back half of March. Both still deliver reliable mountain views while shaving the worst of the queues at the high passes and viewpoints.
Everest Base Camp weather month by month
| Season | Months | Conditions | Crowds |
|---|---|---|---|
| Autumn | Late Sep–Nov | Clear, dry, stable | Highest |
| Winter | Dec–Feb | Very cold, clear, some closures | Low |
| Spring | Mar–May | Warming, blooms, some haze | High |
| Monsoon | Jun–early Sep | Wet, cloudy, leeches low down | Lowest |
Temperatures drop sharply with altitude regardless of season. At Gorak Shep (5,180 m), where you sleep before the Kala Patthar sunrise, overnight lows reach −10 to −15 °C in autumn and below −20 °C in winter. Pack for those numbers even in October.
Is winter a good time to trek Everest Base Camp?
Winter, from December to February, offers the clearest air of the year and almost empty trails, but it is genuinely cold and some high lodges close. Daytime walking is pleasant in sun, yet the pre-dawn climb to Kala Patthar in January can hit −25 °C with wind. Winter suits experienced cold-weather trekkers with a four-season sleeping bag and a guide who knows which Gorak Shep lodges stay open. For most people, autumn and spring remain the smarter choice.
Spring carries a bonus: it is the Everest mountaineering season, so reaching base camp in April or May means seeing the expedition tent city in full swing. The trade-off is afternoon haze that can soften the long valley views from around midday.
When should you avoid trekking to Everest Base Camp?
Avoid the monsoon from June to early September. Trails through the lower Khumbu turn slick, cloud erases the mountains for days, and flights into Lukla, already weather-dependent, are cancelled far more often. The Himalayan Rescue Association reports that altitude problems compound when bad weather forces hikers to push schedules, so the monsoon's flight delays create real safety pressure. Current health and altitude advice is published by the Himalayan Rescue Association.
Whatever month you pick, build at least two acclimatisation days into the itinerary, typically at Namche Bazaar (3,440 m) and Dingboche (4,410 m). Climbing high and sleeping low on those days is the best single defence against acute mountain sickness, and our high-altitude training guide covers the conditioning that makes acclimatisation smoother.
What to pack for the Everest Base Camp season you choose
Your sleeping bag rating and pack volume shift with the season. Autumn and spring trekkers do well with a 50–65 L lodge pack such as the Deuter Aircontact Lite 45+10 or the Osprey Atmos AG 50, since teahouses provide bedding and you carry only clothing, layers and water. Winter trekkers should size up to a Gregory Baltoro 65 to fit a heavier down bag and extra insulation. For the full season-specific kit list, see our dedicated Everest Base Camp packing list.
One scheduling note for 2026: Lukla flights frequently relocate to Manthali (Ramechhap) during the peak autumn and spring blocks, adding a 4–5 hour pre-dawn drive from Kathmandu. Confirm the departure airport with your agency the week before you fly.
How do crowds and booking work in peak season?
October is the single most crowded month, and the bottleneck is beds, not the trail itself. Lodges in Namche Bazaar (3,440 m), Dingboche (4,410 m) and especially Gorak Shep (5,180 m) fill within hours during peak weeks, and a guide who has not pre-booked can leave you sharing a dining-room floor at altitude. For 2026, reserve teahouses and the Lukla flight several months ahead, and build one buffer day into the itinerary for the near-inevitable flight delay.
If you want autumn's stability without the queues, the Three Passes Trek shares the same season but diverts onto far quieter high cols and the Gokyo valley, rejoining the main trail only briefly. Spring crowds peak slightly later, in mid-April to early May, alongside the Everest mountaineering season. Whichever window you choose, slower is safer: the extra acclimatisation nights that ease altitude sickness also spread demand across more lodges. Current permit rules and the guide requirement are confirmed by the Nepal Tourism Board, and you can dial in the fitness that makes a slower, busier schedule comfortable with our high-altitude training plan.
Frequently Asked Questions
What is the warmest month to trek to Everest Base Camp?
May is the warmest trekking month, with lower-village daytime highs around 15–17 °C and milder nights at altitude. It is also peak mountaineering season at base camp. The trade-off is increasing afternoon haze and a higher chance of pre-monsoon thunderstorms late in the month.
How many days do you need for the Everest Base Camp Trek?
Plan 12 to 14 days for the round trip from Lukla, including two acclimatisation days at Namche Bazaar and Dingboche. Rushing the schedule to under 10 days sharply raises the risk of altitude sickness. Adding a day for possible Lukla flight delays is wise in any season.
Can you trek to Everest Base Camp during the monsoon?
It is possible but not recommended. From June to early September the lower trail is wet and leech-prone, mountain views vanish behind cloud for days, and Lukla flight cancellations are common. Trekkers who go anyway should budget extra buffer days and expect limited photography.
Is it cold at Everest Base Camp in October?
Yes. While daytime walking is mild, overnight lows at Gorak Shep (5,180 m) reach −10 to −15 °C in October, and the dawn climb to Kala Patthar is colder still with wind chill. A sleeping bag rated to at least −15 °C and a full down jacket are essential even in the best season.
Does the Lukla flight get cancelled often?
Yes, the 25-minute flight between Kathmandu and Lukla is highly weather-dependent and cancellations are common, especially in the afternoon and during the monsoon. In the peak autumn and spring seasons, flights frequently shift to Manthali (Ramechhap), adding a 4–5 hour pre-dawn drive. Build at least one buffer day into your itinerary to absorb a delayed flight without missing your international connection home, and consider a morning departure slot, which has the best weather odds. Trekkers on tight schedules sometimes book a helicopter as a paid backup out of Lukla, though this adds 500 USD or more and is itself grounded in poor visibility, so the buffer day remains the most reliable safeguard.