When is the best time to freedive on Gili Air?

Short answer: any month. The sea around Gili Air stays at about 28°C all year, warm enough to freedive comfortably in a thin wetsuit in January as in July. But freediving is more sensitive to conditions than scuba: you spend time breathing at the surface, so waves and swell matter, and you look down a line, so visibility matters too. Here is how the year really feels from the buoy.

Dry season (April to October): the easy months

This is the classic Gili Air picture: calm seas, sunshine and the best visibility of the year, often 20 to 30 metres. For a first trial or a Level 1 course, these are the most comfortable conditions: a flat surface to breathe on, and a line you can follow with your eyes all the way down.

The only downside is popularity. July and August are the busiest months on the island, so book your course a few days ahead and be ready for more boats at the popular sites. Training lines are set at calm spots close to the island, so the crowd affects your dinner reservations more than your dives.

Rainy season (November to March): green, quiet and underrated

Expect the odd downpour, usually in the afternoon, and greener water with more plankton, which means visibility a little lower than in the dry months. Lost days are rare. And the season has real advantages for freedivers:

• The island is quiet. Fewer people on the boats, more one-to-one time with your instructor.
• The water is still about 28°C. No need for a thicker suit.
• It is the big-animal window. Manta rays and mola mola are most often seen around the Gilis in these months. Nothing is guaranteed, but a manta passing under your line is a memory for life.

The sweet spots

If you can choose, aim for May–June or September–October: dry-season calm and clarity without the peak-season numbers. These are also great months for a training week, when you want several consecutive days in the water.

Within the day: mornings win

Whatever the month, the sea is usually at its calmest in the morning, which is why our line sessions mostly start early. Afternoons are often for the pool, for theory, or for rest. On days when the ocean does not cooperate, pool work fills in, so you progress without losing a day.

Thermoclines: the cool surprise

The Lombok Strait carries a huge flow of ocean water between the Pacific and the Indian Ocean. Sometimes, deeper on the line, you drop through a thermocline: a layer where the water suddenly feels colder. On training lines it is usually brief and more surprising than uncomfortable, but it is worth knowing about if you aim for depth. Our article on the Indonesian Throughflow explains where it comes from.

How many days to plan

• Freediving Trial: half a day. Easy to fit into any trip.
• SSI Level 1: two days, plus a little margin in case the weather moves a session.
• Training: the best progress comes from short sessions on consecutive days. Three to five days is a good rhythm; five is where things often click.

Combining freediving and scuba on the same trip? Remember the waiting time before flying after scuba (see our flying after diving guide), and ask us to plan the order of your sessions.

Whatever month you pick, send us your dates on WhatsApp or at freedivegiliair@gmail.com: we look at this water every morning and will tell you honestly what to expect.