26 Nov 2015

Based on the monsoon cycle, the Northeast Monsoon is expected to start in Brunei Darussalam in
December until March. Normally, during the Northeast Monsoon season, the country will experience
very active weather conditions with occasional heavy showers and thundershowers in the afternoon
or evening, prolonged rain, and thunderstorms during late night or early morning, especially in
December and January.

The prevailing regional weather conditions and the latest seasonal forecasts issued by the major
world climate centres indicate that the presence of strong El Nino conditions (associated with
suppressed precipitation) in the Asia Pacific region is expected to continue until January 2016. In view
of this, most of the countries over the Asia Pacific region, including Brunei Darussalam are expected to
experience subdue weather conditions with much less monsoonal rainfall activities in December 2015
and January 2016.

Our climate records show that the long-term average rainfall for 30 years (1979-2008) recorded at the
Meteorological Observation Station Brunei International Airport for the month of December and
January are 354.4 mm and 271.1 mm respectively. During the previous Northeast Monsoon, despite
the occurrence of a weak El Nino in the Asia Pacific region, our country however had experienced very
active weather conditions, with total rainfall of 336.7 mm in December 2014, and 466.6 mm in January

In this regard, the general public, road users and mariners are advised to continue to be alert and to
take necessary precautionary actions, especially during heavy rain and thunderstorms, to ensure
safety and prevent occurrence of undesirable incidents. It is important to note that the risks of flash
floods and flooding over the low-lying and flood-prone areas, and the risks of landslides can still
occur, especially during moderate to heavy rainfall of more than 2 hours. The risk of severe flash
flooding may also occur during heavy rain coinciding with high tide. Strong surges from the
Northeasterly winds may also increase the height of the waves over Brunei Waters from moderate
state to rough state.

We shall continue to monitor the weather conditions closely and will issue appropriate weather
advisory or warning, as and when necessary according to the DepartmentÂ’s Standard Operating
Procedures. To get the latest weather information, the public can contact the Duty Meteorological
Forecaster at the Forecast Office through Weather Line 114, or visit our website at or
follow our Facebook Page at and mobile application Brunei WX.


Muhamad Husaini bin Aji
Acting Director of Meteorology
Brunei Darussalam Meteorological Department
Ministry of Communications
26th November 2015