BMKG: North Sulawesi Weather Clear to Light Rain Until August 16

North Sulawesi can expect mostly clear skies with light rain until August 16, 2026, according to the Indonesian Meteorology, Climatology, and Geophysics Agency (BMKG). This forecast covers 15 regencies and cities across the province.

Karina Husna, operational coordinator at BMKG Sam Ratulangi Manado, attributed the weather pattern to the active Australian Monsoon and a strong El Nino. These phenomena are causing a decrease in cloud development and rainfall across the region. Areas predicted to experience clear to light rain include Manado, Tomohon, Bitung, Kotamobagu, and the regencies of Minahasa, North Minahasa, Southeast Minahasa, South Minahasa, Bolaang Mongondow, North Bolaang Mongondow, South Bolaang Mongondow, East Bolaang Mongondow, Siau Tagulandang Biaro, Sangihe, and Talaud.

Separately, the BMKG's Maritime Meteorology Station in Bitung issued a high wave warning effective until August 13, 2026. This alert is crucial for coastal residents and maritime activities. Winds in North Sulawesi are generally blowing from the southeast to southwest at speeds of 10 to 25 knots, contributing to increased wave heights in several waters. Moderate wave heights, between 1.25 and 2.5 meters, are possible in the waters of North Minahasa, Siau Tagulandang Biaro, Sangihe, Talaud, and the Maluku Sea.

Despite the generally fair weather forecast, BMKG urges residents to remain vigilant. The agency advises caution regarding potential moderate to heavy rainfall, which may be accompanied by lightning, thunder, and strong winds, as well as an increase in daily rainfall accumulation.

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The Australian Monsoon phenomenon is active and El Nino with strong intensity is the main factor. Both phenomena affect the decrease in cloud growth and rainfall in the North Sulawesi region.