October in Bandar Seri Begawan is the rainiest month of the year. In October, the weather in Bandar Seri Begawan is typically hot. Average daily high temperature in October is about 29 degrees above zero. On average, Bandar Seri Begawan has 30 rainy and 1 sunny 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.