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Indonesia expects wet season onset delayed to early November

Indonesia's meteorological agency has forecast that the seasonal rains will begin in early November, marking a later-than-usual start to the wet season. The delay comes as weather patterns continue to shift across the Southeast Asian archipelago.

LSN Singapore · 22 September 2026

Indonesia expects wet season onset delayed to early November

Indonesia's weather authority has predicted that the wet season will commence in early November, pushing back the typical October onset by several weeks. The announcement reflects evolving atmospheric conditions affecting the region's monsoon patterns.

The wet season typically arrives in October, bringing substantial rainfall across much of the archipelago. However, this year's delayed start indicates shifts in seasonal weather patterns that meteorologists have been monitoring closely in recent months.

The forecast has implications for agriculture, water resources, and infrastructure planning across Indonesia. Farmers and water authorities typically prepare for increased precipitation during the wet season, and the adjusted timeline may affect planting schedules and water management strategies.

The delay in the wet season's arrival is consistent with broader climate trends observed in Southeast Asia in recent years. Officials have urged residents and businesses to adjust their preparations accordingly based on the revised seasonal forecast.