October in Bandar Seri Begawan is the rainiest month of the year. In October, the weather in Bandar Seri Begawan is typically warm. Average daily high temperature in October is about 27 degrees above zero. On average, Bandar Seri Begawan has 28 rainy, 1 sunny, 1 cloudy, and 1 partly cloudy day in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Bandar Seri Begawan.