The best time to visit Humantay Lake
Pick the month and the hour with as much care as the tour. Salkantay hides behind cloud on plenty of days, and the lake loses much of its color without sun. The dry months give the best odds of a clear view but bring the biggest crowds. This guide goes season by season. After that it looks at the hour you arrive and at how far ahead the popular tours fill.
Two seasons and two months between
Weather in the Andes around Cusco runs on a simple pattern. The dry season lasts roughly from May to September and the wet season roughly from November to March. April and October sit in between. The calendar changes the sky far more than it changes the temperature, and for a lake that lives on reflected light, the sky is what counts.
| Months | Sky | Trail | Crowds |
|---|---|---|---|
| May to September | Clear mornings most days, best odds of seeing Salkantay | Dry and dusty, frost at dawn | Busiest, June to August above all |
| April and October | Mixed, can go either way | Mostly dry, some wet days | Moderate |
| November to March | Cloud often hides the peaks, rain or snow after midday | Muddy and slippery, worst in February | Fewest visitors |
Dry season, May to September
These are the months for the view. Mornings tend to start clear, and the snowfields of Nevado Humantay and Salkantay stand out sharply above the water. Clear nights also mean cold dawns. At Soraypampa, about 3,900 m (12,800 ft), the air sits around 32 °F (0 °C) when the vans arrive, and on the coldest mornings it drops well below freezing. By midday the sun at the shore, about 4,200 m (13,780 ft), can push it to roughly 50–59 °F (10–15 °C), though the wind off the glacier makes it feel cooler.
The cost is company. The months from June to August draw the most visitors to Cusco, and the shore fills when the group vans unload together. If you can only travel then, the clear sky usually makes up for the crowd, but book well ahead and expect to share the view. Strong sun and dry air are part of the deal too, so sunscreen and lip balm earn a place in the daypack.
Wet season, November to March
Rain does not fall all day, but clouds build early and often swallow the peaks by the time groups reach the lake. Afternoon showers are common, and up high they can turn to snow. The trail turns to mud, which makes the loose-stone descent slower. February is the wettest month of all.
There is an upside. Far fewer people make the climb, and fresh snow sometimes dusts the ridges. A break in the cloud over an empty shore is a fine reward. Pack a rain poncho and expect nothing; what to wear and bring to Humantay lists the wet-weather kit.
April and October
The shoulder months are a gamble with decent odds. April follows the rains, so the valley is green and the cloud is thinning, while October can bring the first wet afternoons. Crowds are lighter than in midwinter (the southern-hemisphere winter, June to August), and a clear morning in either month can match anything in the dry season.
The color of the water
Laguna Humantay owes its turquoise to rock flour, the fine glacial silt that meltwater carries off the ice above. That silt scatters sunlight, so the shade you see depends on the light. In full sun the water glows bright turquoise; under heavy cloud it turns a darker green-grey. No tour can promise either the color or a clear Salkantay on your date, and nobody should. The hike, step by step includes the short climb to the ridge for the view straight down on the water.
The hour matters as much as the month
Most group tours collect you around 4 am and stop for breakfast in Mollepata. They reach the shore late in the morning. In many seasons that is just when cloud starts to gather, and it tends to build further after midday. Arriving earlier improves the odds. exploor's Beat the Crowds day, from ~$199, leaves at 3 am and reaches the trailhead about 7:40 am, ahead of the big vans. On BioAndean's two-day trip, from ~$350, you sleep at Soraypampa, so the mountains are yours in the late light and at dawn once the day vans have gone.
An early pickup alone does not guarantee an early arrival. Willka Travel's small-group day, from ~$45, collects at 3:30–4 am, but its catch is that alarm plus groups of up to 19, so the walk starts with a crowd anyway. Kantu's private day, from ~$110, keeps the day to your party alone, yet the catch is the price for what remains the same long 14–15-hour timetable.
Ahead of the vans
exploor's day leaves Cusco at 3 am and has you at the trailhead about 7:40 am, with eight people at most. You are back at your hotel around 3:30 pm, entrance and meals included, from ~$199. Free cancellation up to 24 hours ahead.
How far ahead to book
Viator shows how many days in advance travelers book each tour on average, and the gap between the big group days and the small ones is wide.
- Kantu Peru Tours group day. About 32 days ahead;
- Inka Altitude. About 34 days ahead;
- Chullos Travel Peru. About 35 days ahead;
- BioAndean's dome night. About 67 days ahead;
- exploor's early start. About 139 days ahead, the longest lead time by far.
Every main tour except BioAndean's cancels free until 24 hours before the start, so booking early costs little, and you can drop the date if the forecast turns. Mountain forecasts for a spot like Soraypampa are rough at best, though, so read a cloudy one as odds rather than a verdict. The dome trip is non-refundable and cannot be changed, so choose its date with the season in mind rather than the forecast. Before any date, leave yourself time to adjust to the height; altitude at Humantay Lake explains why. What a Humantay Lake tour costs sets all the prices side by side, and getting there from Cusco shows how the early pickups play out.