Swan.my.id - Jakarta, generally dry weather will dominate several parts of Indonesia on Thursday, October 1, 2026. However, the Indonesia weather forecast October 1 2026 from the Meteorology, Climatology, and Geophysical Agency (BMKG) warns that heavy rain may still occur locally.
Residents also need to watch for Cumulonimbus clouds, which can disrupt flight operations. In addition, waves reaching 4 meters may affect several waters, while tidal flooding remains possible along the coast of Maluku.
BMKG advises people to follow the latest weather updates before traveling. The warning applies particularly to air passengers, fishermen, and communities living near the coast.
Cyclonic Circulation Observed North of Kalimantan
BMKG is monitoring a cyclonic circulation over the waters north of West Kalimantan. This system could increase the growth of rain clouds across parts of West Kalimantan, northern Central Kalimantan, and areas surrounding the circulation.
Therefore, localized rain remains possible even though dry conditions will generally prevail. The atmospheric situation requires attention because weather conditions can change between regions.
BMKG also warns air transportation users about the potential presence of Cumulonimbus clouds. These clouds may develop over western Sumatra, the western Indian Ocean near Indonesia, Papua, and central Papua.
Because of that risk, prospective passengers should check the latest information from airports and airlines before departure. Weather developments around flight routes can affect travel conditions.
Weather Forecast for Major Cities
The following conditions are forecast for several major cities across Indonesia on Thursday, October 1, 2026.
- Light rain: Banda Aceh, Pekanbaru, Tanjung Pinang, Jambi, and Bandar Lampung.
- Thick cloud: Pangkal Pinang.
- Hazy conditions: Bengkulu and Palembang.
Across Java, Bali, and the Lesser Sunda Islands, light rain may occur in Serang, Semarang, and Surabaya. Jakarta, Yogyakarta, and Denpasar may experience thick cloud, while Mataram may face smoke or haze.
In Kalimantan, light rain is forecast for Pontianak, Palangkaraya, and Tanjung Selor. Banjarmasin may experience smoke or haze.
Light rain may also affect Palu and Mamuju. Meanwhile, Gorontalo, Manado, and Kendari may see cloudy to heavily cloudy conditions.
In eastern Indonesia, Nabire and Jayawijaya may receive light rain. Ambon, Ternate, Manokwari, Jayapura, and Merauke may remain cloudy to heavily cloudy.
Waves of Up to 4 Meters Threaten Several Waters
Land conditions are not the only concern. BMKG forecasts winds across Indonesia at speeds of 6 to 25 knots. These winds may contribute to rougher seas in several areas.
Waves measuring between 2.5 and 4 meters may occur in the western Indian Ocean off Lampung and the southern Indian Ocean off Central Java.
Fishermen and people using sea transportation should adjust their activities to current marine conditions. Operators should also monitor updated marine weather information before sailing.
Meanwhile, coastal communities in Maluku need to pay attention to tidal conditions. BMKG warns of possible tidal flooding, which could disrupt daily activities when sea levels reach certain conditions.
Dry Weather Does Not Eliminate Wildfire Risks
BMKG stresses that widespread dry weather does not mean every part of Indonesia will remain free from rain. Heavy rain can still develop locally, particularly in areas affected by changing atmospheric conditions.
At the same time, residents should remain alert to drought and forest and land fire risks. Dry conditions can increase the vulnerability of areas that lack sufficient rainfall.
People should adjust their activities and travel plans according to local weather conditions. Furthermore, they should continue monitoring official BMKG channels for the latest updates.
With atmospheric conditions remaining dynamic, checking the forecast before traveling remains important. This step is especially relevant for air passengers, sea transportation users, fishermen, and residents in coastal areas.
