Best Time to Climb Mount Rinjani

The best time to climb Mount Rinjani is during the dry season, from April to October — and choosing the right month is one of the simplest ways to make sure your trek is safe, comfortable and rewarding. Rinjani is a high, exposed volcano, and weather makes a real difference up there: dry trails, clear summit views and starry campsites turn a hard climb into an unforgettable one. As a local Lombok team who’ve guided this mountain since 2006, we know its seasons intimately — here’s exactly when to go, and why.

The Short Answer: April to October

The dry season, roughly April to October, is the ideal window to climb Mount Rinjani. During these months you’ll find drier, safer trails, clearer skies for that famous sunrise summit, and far more reliable conditions overall. Importantly, Rinjani National Park usually closes during the wettest months (around January to March) for safety, as heavy rain makes the steep trails and summit scree dangerous. So the dry season isn’t just the nicest time — for much of the wet season, trekking simply isn’t possible.

Month-by-Month Guide

Every part of the dry season has its own character:

April & May — The start of the dry season and a beautiful time to go. The landscape is still green from the rains, waterfalls are full, and the crowds are thinner. Occasional early-season showers are possible but conditions are generally excellent.

June, July & August — Peak season, and for good reason: the most reliable weather, clear summit views and cool, comfortable trekking temperatures. These months are the busiest, so book ahead. Summit mornings are cold, so warm layers matter.

September & October — Our quiet favourite. The weather is still dry and stable, the crowds ease off after the peak, and the trails are in great shape. A wonderful time for a calmer, equally spectacular climb before the rains return.

What About the Wet Season?

From around November to March, Rinjani enters its wet season, and this is not the time to climb. Heavy rain makes the trails slippery and the summit scree hazardous, clouds often hide the views, and — as noted — the national park is usually closed at the wettest point (around January to March) for safety. We don’t run summit treks in these conditions, because your safety and enjoyment come first. If you’re travelling in this window, we’d be glad to suggest other wonderful Lombok adventures instead.

A Note on Summit Weather

Whatever month you choose, remember that Rinjani makes its own weather. Even in peak dry season, the summit is cold before dawn — often near freezing — and conditions can change quickly at altitude. That’s nothing to fear; it’s simply why we provide warm camps, hot meals and experienced guides who read the mountain daily. Come prepared with warm layers (see our packing tips), and the cool summit air becomes part of the adventure rather than a hardship.

Ready to Plan Your Rinjani Trek?

Now you know when to go, the next step is choosing which trek suits you. Have a look at our Mount Rinjani destination page, part of a UNESCO Global Geopark, read our guide to which Rinjani trek is right for you, or message us on WhatsApp with your travel dates and we’ll help you pick the perfect window. Crafted by local experts since 2006.