In August, the weather in Bandar Seri Begawan is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Bandar Seri Begawan has 26 rainy, 4 cloudy, and 1 sunny day in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Bandar Seri Begawan.