Sandakan is Sabah's gateway to some of Borneo's most extraordinary wildlife. Perched on the northeast coast of Malaysian Borneo, this port city serves as the launching point for encounters with orphaned orangutans at Sepilok, Borneo's tiny sun bears, proboscis monkeys with their cartoonish noses, and the wildlife-rich Kinabatangan River. The city itself is rough around the edges, but that's not why you come: you come for the rainforest, the conservation centers, the fresh seafood pulled straight off fishing boats at the Sim Sim Water Village, and the chance to see some of the planet's most endangered animals in their native habitat.
Sandakan is hot and humid year-round, so there's no single perfect window the way temperate destinations offer. That said, the driest stretch falls from roughly March through September, when rainfall is least frequent and you'll have the most comfortable conditions for jungle treks and river cruises. May and June are particularly dry, making them your best bet for clear skies during orangutan feedings and Kinabatangan River wildlife spotting. If you'd rather dodge the peak crowds that arrive in May, June, and December, consider March or April as a shoulder alternative: slightly quieter, still relatively dry, and accommodation deals are easier to find. November through January brings the heaviest rain, so plan around that if possible.
Spring in Sandakan, Malaysia
March marks the transition from the wetter months into one of Sandakan's more agreeable stretches. The Sepilok Orangutan Rehabilitation Centre runs feeding sessions at 10am and 3pm daily, and spring mornings tend to be clearer, giving you better odds of watching orangutans swing down to the platforms. Next door, the Bornean Sun Bear Conservation Centre lets you observe the world's smallest bears from elevated walkways as they forage and climb in their forest enclosure. Afternoons see scattered showers roughly 2 to 3 days per week, so carry a light rain jacket for the walk between centers.
Highs average 88.9°F (31.6°C), and the heat is noticeable even early in the day. Mornings start warm at 76°F (24.4°C), so forget about cool dawns: lightweight, breathable fabrics are essential. The Rainforest Discovery Centre, about 1.5km from Sepilok, is worth a morning visit for its canopy walkway and bird-watching platforms. Humidity hovers near 79%, making the shaded forest trails far more pleasant than open-air walking. Tourism remains fairly slow through spring, which means accommodation deals and shorter queues at the conservation centers.
If you want a cultural break from the wildlife circuit, walk the Sandakan Heritage Trail, a marked route connecting the Agnes Keith House, the 100-step staircase, and the historic St. Michael's and All Angels Church, one of Sabah's oldest stone churches. The trail also passes Sam Sing Kung temple, dating to 1887. Pack a refillable water bottle and sunblock; you'll want both for any time spent outside the tree canopy.
Summer in Sandakan, Malaysia
This is when Sandakan's rainfall drops to its lowest, making summer the top season for extended jungle excursions. May is one of the driest months, with rain falling only about 23% of the time, and June stays low at 29%. The Kinabatangan River, Malaysia's second longest, is at its best during these months: multi-day boat safaris departing from Sandakan take you through some of Borneo's richest biodiversity, where you can spot pygmy elephants, wild orangutans, crocodiles, and hornbills from the water. Morning cruises through the mist are particularly rewarding.
Highs average 90.8°F (32.7°C) through the season, and lows of 75.5°F (24.2°C) mean the heat barely relents after dark. Early August can push to peak highs of 91.4°F (33°C) with overnight lows of 75.6°F (24.2°C), so plan strenuous activities for the early morning. A fireflies and mangrove cruise in the evening offers a cooler alternative, drifting through coastal mangroves as thousands of fireflies light up the trees. Quick-dry clothing and sturdy closed-toe shoes are non-negotiable for any rainforest walk, and leech socks are a smart addition if you're trekking deeper into reserves like Deramakot or Gomantong Caves.
Summer is the second busiest tourism period, so book Kinabatangan lodge stays and Sepilok-area accommodation well in advance. Rates climb slightly compared to spring. For a memorable meal between excursions, head to the Sim Sim Water Village, a sprawling stilt community where seafood restaurants serve prawns, steamed fish, and the local specialty of springy noodles pulled from the kitchen that morning. The 8th bridge is where you'll find the main dining spots right over the water.
Fall in Sandakan, Malaysia
Visitor numbers drop sharply from September through November, hitting the year's lowest point in November. If you don't mind more frequent rain, this is the most affordable time to experience Sandakan's wildlife. The Sepilok Orangutan Rehabilitation Centre is notably less crowded, and the afternoon 3pm feeding, usually the quieter session anyway, can feel almost private. Proboscis monkeys at Labuk Bay Sanctuary continue their daily feeding schedule, and the endemic creatures are just as active in damper conditions.
Rain becomes more consistent, falling roughly 3 to 5 days per week, with October and November climbing to 45% and 48% rainfall frequency respectively. Highs average 89.2°F (31.8°C) and lows sit at 75.4°F (24.1°C), so the temperature barely shifts from summer. Humidity, however, rises noticeably into the low 80s, making the air feel thicker. Trails at the Rainforest Discovery Centre can get muddy, so waterproof hiking shoes are worth the luggage space. The canopy walkway remains open and offers a drier vantage point above the forest floor.
Accommodation is priced affordably across the Sepilok area and Sandakan town. Use the quieter period to add the Sandakan Memorial Park to your itinerary, a rainforest-framed site commemorating the Australian and British prisoners who lost their lives during World War II. The park is free to enter and provides a sobering contrast to the wildlife-focused days. Bring a solid rain shell and pack electronics in waterproof bags for river excursions.
Winter in Sandakan, Malaysia
December through February is Sandakan's wettest stretch and, paradoxically, its busiest for tourism, with December drawing the highest visitor volume of the year. January is the single wettest month, with rain occurring roughly 58% of the time. Trails at Sepilok and the surrounding reserves can be soggy, and Kinabatangan River water levels rise, which occasionally limits boat access to certain tributaries. If you're visiting during this period, plan for flexible itineraries and expect some wet afternoons to disrupt outdoor plans.
Highs drop to the year's lowest averages at 85.7°F (29.8°C), and lows of 75.2°F (24°C) make this technically the mildest season, though it still feels substantially warm by global standards. The slightly lower temperatures can actually make rainforest walks more comfortable when it isn't raining. The Puu Jih Shih Temple, the largest Chinese Buddhist temple in Sandakan, is worth a visit for its ornate dragon sculptures and a panoramic observation deck overlooking the bay; it's a good option when showers interrupt wildlife plans.
Turtle Islands Park, accessible by boat from Sandakan, operates year-round, though sea conditions during the wetter months can sometimes delay crossings. If seas cooperate, overnight stays on the islands let you watch green turtles come ashore to nest. Book accommodation early for December, as availability tightens. A waterproof daypack and quick-dry layers will serve you well through the frequent downpours.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Sandakan, Malaysia
Most visitors fly into Sandakan Airport from Kota Kinabalu or Kuala Lumpur; the flight from KK takes under an hour. Once in Sandakan, rideshare apps like Grab are the most convenient way to reach Sepilok and other attractions outside the city center, which are generally 20 to 40 minutes by car. Many conservation centers cluster near Sepilok, so staying in that area rather than downtown saves significant daily travel time. For the Kinabatangan River, most lodges arrange round-trip transport from Sandakan as part of multi-day safari packages.
Sandakan is generally safe for tourists, with wildlife areas and conservation centers well-patrolled. As with any tropical destination, drink bottled water, use insect repellent before entering forest reserves (but not inside the orangutan sanctuary, where repellent chemicals are toxic to the apes), and apply sunscreen liberally. Watch your footing on wet boardwalks and muddy forest trails, particularly during the wetter months.