Diving Gili Air in the rainy season: is it worth it?

From November to March, Gili Air goes quiet. The island turns green, the afternoon sky sometimes opens, and the boats leave with fewer people on board. If you are wondering whether that is a good time to dive, the short answer is yes, with two trade-offs worth knowing.

What actually changes

The rain. It comes in short, intense bursts, usually at night or late in the afternoon. Underwater you do not notice it at all. Our boat rides only take 5 to 15 minutes, so when a squall passes over, we simply wait twenty minutes and go. We run trips 365 days a year; the rare cancelled day is for a specific storm system every few years, never for “rainy season” in general.

The visibility. Plankton-rich monsoon water moves in, and visibility drops from 20–30 m to around 15–20 m. That is still very comfortable diving: you just lose a little of that “whole reef at once” feeling.

The surface. Some afternoons bring more chop. Mornings are usually the calmest part of the day, which is why we like early dives in this season.

What does not change: the water stays at 27–29°C, and you will see turtles on almost every dive, every month of the year.

What gets better

The same plankton that clouds the water feeds the big animals. This is when things get interesting:

• Manta rays: plankton draws reef mantas to Manta Point off Gili Trawangan, with a peak from November to April.
• Reef sharks: whitetips at Shark Point and Deep Turbo, typically from December to April.
• A whale shark, if you are lucky: from around November to March, the open-sea pinnacles of Takat Malang give a chance of a passing whale shark. Never guaranteed, always unforgettable: read our whale shark story.
• Fewer people: quieter boats, quieter sites, and more time with your guide. Our groups are capped at 4 divers per guide all year anyway.
• Macro doesn’t follow a calendar: frogfish, seahorses and nudibranchs at Hans Reef are there whatever the weather.

Who it suits

• Certified divers chasing big animals: this is your season.
• Macro lovers and photographers: great for macro. Wide-angle shots are a little less crisp than in the dry season.
• Learning to dive: courses run all year, and the training dives at 12–18 m work well in rainy season too. If calm, glassy conditions matter most to you, the dry season (April–October) is the easiest window.

Practical tips

• Dive in the morning. Calmer sea, better light, and you are back before the afternoon showers.
• Pack a light rain jacket and a dry bag for your phone on the boat.
• Stay flexible. If a squall hits, we wait it out: keep a relaxed schedule rather than a tight one.
• Plan a few days. With conditions shifting from day to day, three or more dives give you the best chance of meeting the big animals.

Want the full picture month by month? Read our best time to dive Gili Air guide, or browse the best dive sites. And if you are on the island now, message us on WhatsApp: we look at this water every morning.