Best Time to Visit Peru and Machu Picchu
May through September is the Andean dry season — the best window for Machu Picchu, Cusco, and trekking, with the added catch that this is exactly when everyone else visits too, so book Machu Picchu tickets, trains, and any Inca Trail permit months ahead. May and September (the shoulder edges of dry season) offer nearly the same clear weather with noticeably smaller crowds and more permit availability than peak June-August.
Here's the timing trap that catches a lot of first-time Peru travelers: the instinct to plan an Andes trip around a Northern Hemisphere summer vacation actually lines up correctly this time (May-September is genuinely the dry season) — but it also means booking against the exact same crowd everyone else has, so the real skill is in the details, not the broad season.
May-September — the dry season, and why it matters so much here
This is the reliable window for clear Andean skies, comfortable daytime trekking temperatures, and the best odds of an unobstructed Machu Picchu view (cloud cover genuinely does obscure it on plenty of days, dry season or not, but the odds are much better). It's also, unsurprisingly, when Machu Picchu tickets, trains, and Inca Trail permits are hardest to get — see our Machu Picchu and Inca Trail guides for exact booking windows.
May and September — the smart shoulder months
May and September sit right at the edges of the dry season — nearly the same clear weather as peak June-August, but noticeably thinner crowds and meaningfully better odds of snagging Machu Picchu tickets, trains, and even a late Inca Trail permit without booking a full 5-6 months out. For travelers with flexible dates, this is usually the smartest call in the whole calendar.
October-April — the rainy season, region by region
| Region | What changes in the rainy season (Oct-Apr) | Worth it? |
|---|---|---|
| Cusco / Sacred Valley / Machu Picchu | More rain, especially afternoons; landscapes turn vividly green; fewer crowds and easier bookings | Yes, if you don't mind some rain and prioritize lighter crowds — just build in flexible days |
| The Classic Inca Trail | Closed entirely each February for annual maintenance | N/A in February specifically — plan an alternative trek or the train that month |
| Lima | Actually Lima's driest, sunniest season (its rainy months are the reverse, roughly May-November, with coastal fog rather than real rain) | Yes — good timing overlap if pairing Lima with an Andes trip |
| The Amazon (Tambopata/Iquitos) | Rivers rise, flooding parts of the forest, opening canoe access to new areas | Yes — a genuinely different, still rewarding way to see the rainforest, with wetter logistics |
The Inca Trail's annual closure
The Classic Inca Trail closes completely every February for trail maintenance and environmental recovery — no permits are issued that month regardless of how far ahead you book. If February is your only window, plan an alternative trek (Salkantay, Lares, or the Inca Jungle Trail) or the standard train route to Machu Picchu instead.
The bottom line
If avoiding rain and having the widest range of activities is the top priority, aim for May-September and book everything (Machu Picchu tickets, trains, Inca Trail permits) as early as your dates are fixed. If you'd rather trade a bit of rain risk for thinner crowds and easier last-minute bookings, May, September, or the shoulder months of the rainy season (October, April) are the smarter value play. Avoid the Inca Trail specifically in February, when it's closed outright.