Bandar Seri Begawan climate

Name: Bandar Seri Begawan
Address: BN

Bandar Seri Begawan is warmest in May, with average highs of 30 °C, and coldest in January, when nights average 24 °C. November is the wettest month (253 mm) and March the driest (146 mm). Figures are 1991–2020 climate normals.

Across a full year Bandar Seri Begawan averages 2,363 mm of rain and 365 days above 25 °C.

Brunei · population 64,409 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month May 30 °C
Coldest month January 24 °C
Driest month March 146 mm
Wettest month November 253 mm
Least cloud March 77 % cloud
Hottest on record March 35 °C
Coldest on record January 20 °C
Warmest sea May 30 °C

What to expectBandar Seri Begawan through the year

Bandar Seri Begawan changes little through the year. Average daily highs stay between 29 and 30 °C, so no month stands out as a season in the way it would further from the equator.

Counted across a normal year, 365 days a year reach 25 °C, 138 of them reach 30 °C. The warmest reading in the 1991–2020 record is 35 °C, in March.

Rain is spread fairly evenly through the year, from 146 mm in March to 253 mm in November. There is no dry season to aim for.

The sea off Bandar Seri Begawan is warmest in May at 30 °C and coldest in February at 28 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	28.7 °C	207 mm	83 %
February	29.0 °C	155 mm	80 %
March	29.9 °C	146 mm	77 %
April	30.4 °C	183 mm	77 %
May	30.5 °C	191 mm	83 %
June	30.2 °C	182 mm	83 %
July	30.1 °C	183 mm	83 %
August	30.2 °C	178 mm	83 %
September	29.9 °C	196 mm	85 %
October	29.3 °C	245 mm	89 %
November	29.1 °C	253 mm	88 %
December	28.9 °C	243 mm	87 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	28.7 °C	23.9 °C	26.0 °C	31.7 °C	20.2 °C	31	3
February	29.0 °C	23.9 °C	26.2 °C	32.9 °C	20.7 °C	28	5
March	29.9 °C	24.3 °C	26.7 °C	34.6 °C	21.4 °C	31	12
April	30.4 °C	24.7 °C	27.2 °C	33.9 °C	23.0 °C	30	18
May	30.5 °C	24.9 °C	27.4 °C	34.2 °C	23.0 °C	31	21
June	30.2 °C	24.7 °C	27.2 °C	34.5 °C	22.3 °C	30	18
July	30.1 °C	24.4 °C	26.9 °C	33.8 °C	22.7 °C	31	17
August	30.2 °C	24.5 °C	27.0 °C	34.1 °C	22.4 °C	31	18
September	29.9 °C	24.3 °C	26.8 °C	32.9 °C	22.7 °C	30	14
October	29.3 °C	24.1 °C	26.3 °C	32.0 °C	22.1 °C	31	6
November	29.1 °C	24.0 °C	26.2 °C	31.3 °C	22.2 °C	30	3
December	28.9 °C	24.0 °C	26.1 °C	32.0 °C	20.9 °C	31	3

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	207 mm	22	12 h/day	83 %	87 %	11 km/h	28.3 °C
February	155 mm	18	12 h/day	80 %	86 %	11 km/h	27.9 °C
March	146 mm	21	12 h/day	77 %	84 %	10 km/h	28.5 °C
April	183 mm	23	12 h/day	77 %	84 %	9.1 km/h	29.6 °C
May	191 mm	23	12 h/day	83 %	85 %	8.8 km/h	30.3 °C
June	182 mm	21	12 h/day	83 %	84 %	9.3 km/h	30.3 °C
July	183 mm	20	12 h/day	83 %	84 %	9.8 km/h	30.1 °C
August	178 mm	20	12 h/day	83 %	84 %	11 km/h	30.1 °C
September	196 mm	23	12 h/day	85 %	85 %	10 km/h	30.0 °C
October	245 mm	27	12 h/day	89 %	87 %	11 km/h	29.5 °C
November	253 mm	27	12 h/day	88 %	88 %	9.7 km/h	29.5 °C
December	243 mm	25	12 h/day	87 %	88 %	9.9 km/h	29.2 °C

How Bandar Seri Begawan compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Bandar Seri Begawan	30 °C	24 °C	2,363 mm	365
Miri · Malaysia	30 °C	24 °C	2,631 mm	365
Kota Kinabalu · Malaysia	29 °C	23 °C	2,615 mm	364
Bintulu · Malaysia	31 °C	23 °C	3,355 mm	364
Tawau · Malaysia	30 °C	24 °C	2,271 mm	365
Tarakan · Indonesia	29 °C	25 °C	3,063 mm	365
Sandakan · Malaysia	30 °C	24 °C	2,967 mm	364

Where Bandar Seri Begawan ranks

Ranking	Position	Value
Warmest sea temperatures in Asia in September	19thof 50	30 °C
Warmest sea temperatures in Asia year-round	19thof 50	29 °C
Warmest sea temperatures in the world year-round	19thof 50	29 °C
Warmest sea temperatures in Asia in August	23rdof 50	30 °C
Warmest sea temperatures in Asia in November	25thof 50	30 °C
Warmest sea temperatures in Asia in May	26thof 50	30 °C

Planning a trip? See the best time to visit Bandar Seri Begawan.

QuestionsCommon questions about Bandar Seri Begawan’s climate

When is the best time to visit Bandar Seri Begawan?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, November, December sit closest to 20 °C on average, May is the warmest month and March the driest. The month-by-month table above has the full picture.

How hot does Bandar Seri Begawan get?

In May, the warmest month, daily highs average 30 °C. About 138 days a year pass 30 °C. The highest value in the 1991–2020 record is 35 °C.

How cold does it get in winter?

Nights average 24 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Bandar Seri Begawan?

November, averaging 253 mm over 27 days with rain. The driest month is March with 146 mm. The year as a whole averages 2,363 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Bandar Seri Begawan rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.