Weather in Сандакан by month: what to expect

The weather in Сандакан remains warm year-round, with only subtle shifts in temperature and rainfall. The city’s tropical climate means you can expect consistent heat, though the amount of rain varies noticeably across the months. If you prefer drier conditions, April and May are among the most comfortable times to visit Сандакан, while January and December bring heavier showers.

Travelers to Сандакан will find that the city’s seasons are less about temperature changes and more about rainfall. The wettest months, January and December, see nearly 400 mm of rain each, while the driest, February, drops to around 133 mm. Even during the rainier periods, downpours are often short-lived, leaving plenty of time to explore.

Temperatures in Сандакан stay within a narrow range, with daytime highs typically reaching +30.1 °C in February and peaking at +32.7 °C in May and August. Nighttime lows rarely dip below +24.6 °C, even in the cooler months, making the climate feel uniformly warm. The hottest stretch spans from April to September, when highs hover around +32 °C.

The sea around Сандакан mirrors the air temperature, staying warm enough for swimming all year. Water temperatures range from +30.1 °C in January and February to +32.5 °C in May, so you can comfortably enjoy the coast regardless of when you visit. The slight drop to +30.6 °C in December is still inviting for a dip.

Rainfall in Сандакан is unevenly distributed, with a clear wet season from November to January. January is the wettest month, averaging 419 mm of rain, while February sees just 133 mm. Even in the driest months, brief showers are common, so packing a light rain jacket is always a good idea.

From June to October, Сандакан experiences moderate rainfall, with monthly totals between 228 mm and 263 mm. The rain usually comes in short bursts, often in the late afternoon or evening, so it rarely disrupts daytime plans. If you’re visiting during these months, a compact umbrella or waterproof bag will come in handy.

For a trip to Сандакан, lightweight and breathable clothing is essential year-round. During the drier months, like April and May, pack loose shirts, shorts, and sandals to stay comfortable in the +32 °C heat. A wide-brimmed hat and sunglasses will help shield you from the strong sun.

If you’re visiting Сандакан in January or December, expect frequent rain, so waterproof footwear and a quick-dry travel towel are useful. A light raincoat or poncho will keep you dry during sudden downpours. Even in the wetter months, temperatures remain warm, so you won’t need heavy layers—just moisture-wicking fabrics to stay comfortable.

No matter when you visit Сандакан, don’t forget reef-safe sunscreen, as the tropical sun can be intense even on cloudy days. A small backpack for day trips will help carry essentials like water, a rain cover, and insect repellent, especially if you plan to explore the city’s lush surroundings.