Things to Do in Lombok in December

December is a reliable window for underwater visibility in the waters around Gili Meno, Gili Air, and Gili Trawangan before the heavier January rains arrive. Water temperature stays at 28°C (82°F), and morning visibility off Gili Meno's turtle sanctuary can reach 20-25 m (65-80 ft) on calm days, conditions where you're floating above sea turtles that have habituated to snorkelers over decades. The Christmas holiday week does compress demand sharply after December 20th, so book organized snorkeling or freediving tours at least 10-14 days ahead if your trip falls in the final two weeks of the month. Mornings offer the calmest conditions. Afternoon swells build as the day progresses. Look for licensed operators certified by the Indonesian diving authority, for freediving instruction where depth safety protocols matter.

The cluster of breaks along Lombok's south coast between Mawi Beach and Selong Belanak produces some of the year's most consistent surf in December, fed by Southern Ocean swells tracking north across the Indian Ocean. Mawi is a powerful, hollow left-hander that works for experienced surfers when the swell is above 1.5 m (5 ft); it shuts down in smaller conditions. Tanjung Aan's bay provides calmer intermediate options. Selong Belanak's long, gentle curve suits beginners with proper instruction, the beach is wide, the rip channels are manageable, and surf schools have been operating here long enough to know the conditions well. Morning sessions before 10 AM catch the offshore winds that groom the surface before onshore breezes arrive. December crowds at these breaks are lighter than July-August, which is a meaningful advantage at a break like Mawi where lineups are limited.

These twin waterfalls above Senaru village on Rinjani's northern flank are accessible year-round and December's light rainfall keeps the trails firm without the February mud. Sendang Gile drops approximately 30 m (98 ft) into a wide pool framed by tree ferns. The spray hits your face from 20 m (65 ft) away on the approach path. Tiu Kelep requires a further 45-minute hike up the same valley, crossing the river twice on stepping stones, and drops the same height into a natural swimming hole where the mist hangs in the canopy above and the water temperature is cold enough to stop your breath, a good thing after the uphill section in 28°C (82°F) heat. The round-trip from Senaru runs 3-4 hours including swimming time. This is the northern trailhead area for Rinjani, so the path is well-established and a local guide available at the trailhead entrance can narrate the ecology and handle the two river crossings with confidence. Worth noting: the path to Tiu Kelep is slippery in sections even in dry conditions, reef-safe aqua shoes beat sandals here.

The small islands off Lombok's southwest peninsula, Gili Nanggu, Gili Sudak, Gili Layar, see a fraction of the boat traffic that the northern Gili Islands attract, and December's conditions are comparable. Coral cover around Gili Nanggu is in notably better condition than many of the northern sites that bear heavier visitor loads, and the fish density reflects that. The crossing from Sekotong beach village takes 15-20 minutes by local boat. December's weather window makes morning trips (departure by 8 AM, return by 1 PM) both the safest and most comfortable option, the sea surface is typically flat in the morning, and you're back on the mainland well before afternoon squalls develop. The southwest is underdeveloped compared to the rest of Lombok's tourist circuit, which means a more basic infrastructure but also the kind of quiet that makes snorkeling feel like discovery rather than an organized experience.

Sade village near Rambitan on the south coast road is an active Sasak community where the traditional cylindrical lumbung rice barns and thatched-roof family compounds have been maintained for centuries, not reconstructed for visitors. In December, before the Christmas-week volume arrives, the ratio of visitors to residents makes genuine interaction possible in a way that mid-July does not. The weavers at Sukarara, approximately 25 km (15.5 miles) north of Kuta, run active looms producing songket fabric for local weddings and ceremonies alongside tourist purchases. The process of threading the back-strap loom for a single piece takes days, and watching someone work through a complex geometric pattern is worth more time than most travelers give it. Pringgasela village in east Lombok, about 40 km (25 miles) from Mataram, produces ikat weaving using natural dyes from plants and is considerably less visited than Sukarara, the road east is rougher, which keeps the casual traffic down. December's lighter crowds at these sites are a genuine advantage over high season.

Pantai Merah, Pink Beach, near Tanjung Ringgit on Lombok's southeast coast gets its color from fragments of red coral blended into the volcanic sand. The blush is subtle rather than dramatic, most visible in morning light when the sand is still wet from the tide and the color intensifies. The broader appeal of the east Lombok circuit is the emptiness: the coastline between Labuhan Lombok and Ekas Bay in December is about as uncrowded as Indonesian tourist infrastructure gets. The surf break at Ekas, a right-hander facing northeast into the bay, works in the same Southern Ocean swell that powers the south coast breaks, though it's less consistent. To be fair about the trade-offs: roads through east Lombok are rough in sections, fuel stops are limited past Selong, and the accommodation options in this area are basic by most standards. This is a circuit for travelers comfortable with some improvisation and a motorbike or hired car rather than a resort-and-day-trip itinerary.