Weather in Biak

Planning your visit? Get the accurate weather forecast when packing for Biak. This section presents current meteorological updates and charts to help you better prepare for your journey.

Located in the equatorial zone, Biak welcomes travellers with a classic humid tropical climate. Here, summer reigns eternal: the weather remains hot and stable throughout the year, without sharp seasonal fluctuations. The average air temperature confidently stays within the +26…+27°C range, while nights bring only a slight coolness, creating ideal conditions for those seeking constant warmth.

A distinctive feature of the local climate is the absence of a clearly defined dry season. Precipitation falls here regularly and evenly throughout the year, and the number of rainy days remains high in practically every month. Indonesia is known for high humidity in this region, and short tropical showers may refresh the air almost daily, so an umbrella or a light raincoat will be essential items in a tourist's luggage.

For travellers, Biak will be a true island of eternal summer, where the concept of changing seasons is quite nominal. Thanks to its equatorial location, this corner of Indonesia demonstrates amazing temperature stability throughout the year. Average figures fluctuate within a minimal range: from 26.6°C in June-July to 27.4°C in May and November. The annual temperature chart represents practically a straight line, guaranteeing warmth during any month of your trip.

Even the nominal division into "summer" and "winter" is barely noticeable here. The warmest periods are considered to be May and November, when daytime highs reach 29.4°C, creating a humid tropical atmosphere. Meanwhile, the months from June to August, which might be considered the coolest season here, bring only slight relief: the daytime temperature drops only to 28.5°C. This time is characterised by mild warmth, which is ideal for beach holidays, as exhausting heat is practically non-existent here.

Daily temperature variations are also minimal, sparing tourists the need to pack warm clothes for the evenings. The difference between day and night readings is only about 4°C. Even on the "freshest" nights of July and August, the thermometer does not drop below 24.7°C, and during the rest of the year, it steadily holds above 25°C. Such a consistent temperature regime makes staying on the island comfortable around the clock.

When planning a trip to Biak, travellers should be prepared for the fact that precipitation falls here with remarkable consistency all year round. In this region of Indonesia, it is difficult to distinguish the dry and wet seasons familiar to many tropical resorts, as rainy weather prevails in all months without exception.

The number of days with precipitation remains at a very high level: from 27 to 30 days monthly. Rains occur especially frequently in March, June, July, August, and December — at this time, practically every day is statistically noted as "wet". The lowest number of rainy days (about 27) falls in February and September, however, the difference compared to the rest of the year is practically unnoticeable for a tourist.

Despite the high frequency of inclement weather, the total volume of rainfall in millimetres remains relatively small and stable (from 7 to 13 mm per month). This indicates that while rains are frequent, they are generally not too heavy. You will most likely encounter light drizzle or brief showers, so a light raincoat will become an indispensable accessory in any season.

When setting off on a journey to Biak, you should plan for the stable hot weather that reigns here year-round. Since the air temperature stays in the comfortable range of 25–29°C, the foundation of your wardrobe should be light clothing made from natural breathable fabrics, such as cotton or linen. T-shirts, shorts, and loose-fitting shirts will ensure necessary ventilation in conditions of high humidity, and the principle of layering is practically not required here due to the absence of sudden cold spells.

Particular attention should be paid to protection from moisture: judging by the climate data, rainy days here are a frequent occurrence in any month. Be sure to take a light raincoat or a compact umbrella, as precipitation can fall almost daily. Despite the cloud cover and rain, the equatorial sun remains active, so do not forget high-SPF sunscreen, a hat, and sunglasses.

For walking, comfortable, quick-drying shoes with non-slip soles are best. Sandals will be useful for beach relaxation, and light trainers for excursions in the surrounding areas. Since Indonesia is a country with a tropical climate, important additions to your luggage will be insect repellents and a waterproof case for your phone and documents to protect them from sudden bad weather.