Weather Hub - Brunei (Site) - Links to forecasts for cities and airports from various weather sources.
Weather Underground - Brunei (Site) - Displays current conditions for all major cities on one page, with five-day forecast and more detailed information for each available.
Brunei Meteorological Service (Site) - Information on the climate of Brunei Darussalam, weather forecasts, warning and advisories and satellite images.
NOAA NWS - Brunei Weather (Site) - US government site provides hour-by-hour weather conditions for the past 24 hours for major cities and locations in the country.
BBC Weather Centre - Country Guides: Brunei (Site) - Provides climate and weather information, facts and statistics about the country, along with five-day forecasts for major cities.