Sabah Wildlife Calendar

The short version

Rainforest trails and coral reefs

The primary forests of Sabah receive rain throughout the year and support resident wildlife regardless of the specific month. Look for orangutans, proboscis monkeys and Bornean pygmy elephants along the Kinabatangan River in April just as well as you might in August. A strict calendar only emerges when you target sea turtle nesting seasons or pelagic arrivals on the offshore reefs.

For the majority of the rainforest species, the month matters less than the daily weather. The temperature in the lowlands stays stable between 24 °C at night and 33 °C by day throughout the year. The rainfall shapes your days on the trails and rivers. Heavy overnight rain delays the morning calls of the gibbons by up to 30 minutes and keeps the root-tangled trails muddy. The drier months from March to October make it easier to navigate the forest and give you clearer skies for photography.

The marine calendar is much stricter. The oceanic conditions on the east coast dictate boat crossings and underwater visibility. March and April bring the calmest seas at Sipadan and March to October offers excellent underwater visibility. December and January bring the northeast monsoon to the east coast. The wind creates surface chop that can delay transfers to the islands and reduce visibility on the shallower reefs. The deep walls at Sipadan stay relatively clear but the 45-minute speedboat journey out there is rougher.

Kinabatangan and Danum resident populations

The animals that bring people to Sabah are resident. The Kinabatangan floodplain and the Danum Valley Conservation Area support their populations regardless of the calendar. Orangutans are on most stays in the primary forest. Proboscis monkeys gather by the rivers every evening to sleep. The Bornean pygmy elephants move constantly through their corridors and are a realistic target on the Kinabatangan regardless of the month.

The birding is excellent year-round for the resident endemics. Bornean bristleheads travel the canopy in noisy parties and are heard every dawn and seen with luck. The Gomantong Caves host a massive exodus of wrinkle-lipped free-tailed bats every evening. Hundreds of thousands of bats spiral out of the cave mouth to hunt and draw bat hawks and eagles in response. This spectacle happens an hour before sunset every day of the year unless heavy rain scatters the column.

Lankayan Island sea turtles

The sea turtles are present on the reefs all year but their nesting follows a clear season. Lankayan Island sits inside the Sugud Islands Marine Conservation Area and serves as a vital nesting ground for green and hawksbill turtles. The prime nesting season runs from June through September. If you visit during these months, nesting females and hatchling releases are realistic targets for your stay.

The island conservation teams monitor the nests and patrol the beaches. August is the height of the season and brings spectacular nocturnal viewings. The weather in the Sulu Sea is stable during this window and gives you calm seas and clear skies. Lankayan is a small island with limited rooms so securing a chalet during the peak turtle months requires planning well in advance.

Sulu Sea whale sharks

The Sulu Sea around Lankayan Island receives a brief pelagic visitor every year. A whale shark migration window opens between March and May. Plankton blooms draw these filter feeders to the reefs around the island. The sightings are a bonus for divers and snorkellers who are already exploring the coral gardens.

The timing aligns with calmer crossings around Lankayan after its January and February closure. The visibility clears significantly in March and the sea surface flattens out. The whale sharks move on by the end of May before the peak turtle nesting begins. If you time a stay for May, you might catch the end of the whale shark window and the early arrivals of the nesting turtles.

Palearctic migrants and resident endemics

The birding calendar splits between the resident endemics and the Palearctic migrants. The northern winter drives passage migrants to Sabah from September through April. The forests receive species like the fairy pitta and the blue-winged pitta during this window. September marks the start of the arrivals and the birds are well settled by November.

Serious birders target the March to August window for the resident species. The drier months trigger nesting activity and intense vocalisation. The understorey species like the giant pitta and blue-headed pitta become highly vocal and respond aggressively to playback. The resident endemics are always present but the spring and summer months make them easier to locate by sound.

Forest fruiting and orangutan feeding

The Bornean rainforest runs on a supra-annual mast fruiting cycle. This phenomenon is tied to the El Niño-Southern Oscillation and occurs at irregular intervals of 2 to 10 years. When a mast year arrives, the vast majority of the dipterocarp trees flower and fruit in intense bursts. Orangutans take advantage of this abundance and spend almost all their feeding time eating fruit. Fruiting trees become a focus for guides looking for orangutans in the canopy.

Between mast events, less fruit is available across the forest. Orangutans switch to a low-energy strategy and rely on fallback foods like leaves and bark. Outside mast events, guides look for individual fig trees that fruit at different times throughout the year. Guides locate orangutans by tracking the fruiting status of these specific trees in their sector rather than relying on the calendar.

Kinabatangan River levels and safaris

The Kinabatangan River drains the interior mountains and the water level dictates the safari experience. The northeast monsoon brings heavy rain from December to February. The river frequently bursts its banks and floods the surrounding riparian forest. High water allows small skiffs to glide over submerged logs and enter narrow oxbow lakes. The floodwaters force the elephants out of the swamps and onto the higher ridges.

Lower river levels from March to October expose more banks where you can look for elephants. As the river drops, it exposes wide grassy banks. The elephant herds come out of the dense forest to feed and bathe at the water's edge in unobstructed view of the boats. The crocodiles bask on the exposed mudflats. The drier trails around the lodges make walking safaris much more comfortable.

Sipadan and Lankayan closures

The marine parks operate with strict regulatory and weather closures. Sipadan Island is closed to all visitors every November and reopens on 1 December. Sabah Parks enacted this closure to allow the reef to recuperate from diver impact. No diving or island landings are permitted from 1 November through 30 November.

Lankayan Island closes every January and February. The northeast monsoon hits the Sulu Sea hard during these months and makes the boat crossing from Sandakan too rough to run safely. The resort shuts down operations entirely and reopens in March when the seas calm down. The terrestrial reserves do not close but December and January bring deep mud to the logging roads at Deramakot and heavy leeches to the trails at Danum Valley.

East coast wildlife by month

The table below breaks down the calendar for the east coast destinations. Semporna covers Sipadan and the southern islands while the Kinabatangan and Danum rows cover the terrestrial wildlife. The west coast operates on a completely opposite weather pattern so these guidelines apply specifically to the primary wildlife hubs in the east.

| Month | Rainforest Interior (Danum) | River Safaris (Kinabatangan) | Sea and Diving (East Coast) | Avian Highlights | | :--- | :--- | :--- | :--- | :--- | | Jan | Wet trails; pack leech socks | High water; deep tributary access | Poor visibility; rough crossings; Lankayan closed | Migrants present | | Feb | Wet but easing late month | High water levels gradually easing | Visibility improving late month; Lankayan closed | Swiftlet nest harvest begins | | Mar | Drying out; excellent trekking | River dropping; ideal viewing | Sipadan visibility rising; whale sharks arrive | Resident breeding begins | | Apr | Least wet month; good canopy access | Ideal low water; elephants on banks | Excellent visibility | Pittas highly active | | May | Warm and humid; steady conditions | Ideal viewing conditions | Lankayan whale shark peak ends | Prime birding; endemics vocal | | Jun | Steady conditions | Good viewing; crocodiles basking | Turtle nesting season begins | Early migrants depart | | Jul | Ideal trekking conditions | Ideal river safaris; dry banks | Sipadan peak visibility | Swiftlet harvest begins | | Aug | Ideal trekking conditions | Ideal river safaris; dry banks | Turtle nesting peak; peak visibility | Migrants arrive late month | | Sep | Rain year-round; good walking conditions | Excellent viewing | Excellent visibility continues | Migrant arrivals accelerate | | Oct | Transition month; rain increasing | Water levels rising | Good visibility; shoulder season | Migrants widespread | | Nov | Rains begin; muddy roads | Heavy downpours | Sipadan closed; Mabul macro open | Migrants settled | | Dec | Heavy rain; muddy trails | Maximum flood risk | Poor visibility; rough seas; Sipadan reopens 1 December | Migrants settled |