Batam climate

Name: Batam
Address: ID

Batam is warmest in May, with average highs of 29 °C, and coldest in January, when nights average 25 °C. December is the wettest month (302 mm) and February the driest (96 mm). Figures are 1991–2020 climate normals.

Across a full year Batam averages 2,313 mm of rain and 364 days above 25 °C.

Indonesia · population 1,296,960 · 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 29 °C
Coldest month January 25 °C
Driest month February 96 mm
Wettest month December 302 mm
Least cloud June 73 % cloud
Hottest on record March 33 °C
Coldest on record January 23 °C
Warmest sea May 30 °C

What to expectBatam through the year

Batam changes little through the year. Average daily highs stay between 27 and 29 °C, so no month stands out as a season in the way it would further from the equator.

Counted across a normal year, 364 days a year reach 25 °C, 11 of them reach 30 °C. The warmest reading in the 1991–2020 record is 33 °C, in March.

Rain is strongly seasonal. December averages 302 mm against 96 mm in February — 3.1 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Batam is warmest in May at 30 °C and coldest in January 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	27.2 °C	199 mm	83 %
February	27.8 °C	96 mm	77 %
March	28.3 °C	152 mm	74 %
April	28.5 °C	187 mm	77 %
May	28.6 °C	221 mm	76 %
June	28.6 °C	189 mm	73 %
July	28.2 °C	180 mm	74 %
August	28.2 °C	157 mm	75 %
September	28.2 °C	146 mm	77 %
October	28.1 °C	199 mm	82 %
November	27.6 °C	285 mm	89 %
December	27.3 °C	302 mm	89 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	27.2 °C	25.0 °C	26.0 °C	30.4 °C	23.0 °C	31	0
February	27.8 °C	25.2 °C	26.4 °C	31.7 °C	23.6 °C	28	1
March	28.3 °C	25.5 °C	26.8 °C	33.1 °C	23.6 °C	31	1
April	28.5 °C	25.7 °C	27.2 °C	31.3 °C	23.7 °C	30	1
May	28.6 °C	26.1 °C	27.5 °C	31.5 °C	24.5 °C	31	2
June	28.6 °C	26.1 °C	27.5 °C	31.0 °C	24.2 °C	30	1
July	28.2 °C	25.9 °C	27.2 °C	31.2 °C	23.9 °C	31	1
August	28.2 °C	25.8 °C	27.1 °C	32.2 °C	23.9 °C	31	2
September	28.2 °C	25.7 °C	27.1 °C	32.9 °C	23.9 °C	30	1
October	28.1 °C	25.5 °C	26.9 °C	32.4 °C	23.5 °C	31	1
November	27.6 °C	25.2 °C	26.4 °C	30.7 °C	23.9 °C	30	0
December	27.3 °C	25.1 °C	26.1 °C	30.7 °C	23.7 °C	31	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	199 mm	19	12 h/day	83 %	83 %	24 km/h	27.5 °C
February	96 mm	13	12 h/day	77 %	81 %	23 km/h	27.6 °C
March	152 mm	21	12 h/day	74 %	81 %	19 km/h	28.5 °C
April	187 mm	26	12 h/day	77 %	83 %	15 km/h	29.5 °C
May	221 mm	27	12 h/day	76 %	82 %	16 km/h	29.9 °C
June	189 mm	23	12 h/day	73 %	81 %	18 km/h	29.7 °C
July	180 mm	23	12 h/day	74 %	80 %	20 km/h	29.3 °C
August	157 mm	23	12 h/day	75 %	80 %	20 km/h	29.0 °C
September	146 mm	21	12 h/day	77 %	80 %	18 km/h	29.0 °C
October	199 mm	25	12 h/day	82 %	82 %	17 km/h	29.2 °C
November	285 mm	28	12 h/day	89 %	84 %	17 km/h	29.2 °C
December	302 mm	25	12 h/day	89 %	84 %	22 km/h	28.2 °C

How Batam 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
Batam	29 °C	25 °C	2,313 mm	364
Ulu Bedok · Singapore	29 °C	24 °C	2,547 mm	365
Singapore · Singapore	29 °C	25 °C	2,552 mm	365
Sengkang New Town · Singapore	29 °C	24 °C	2,583 mm	365
Ang Mo Kio New Town · Singapore	29 °C	24 °C	2,556 mm	364
Pasir Gudang · Malaysia	30 °C	24 °C	2,694 mm	364
Jurong Town · Singapore	29 °C	24 °C	2,593 mm	364

Planning a trip? See the best time to visit Batam.

QuestionsCommon questions about Batam’s climate

When is the best time to visit Batam?

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

How hot does Batam get?

In May, the warmest month, daily highs average 29 °C. About 11 days a year pass 30 °C. The highest value in the 1991–2020 record is 33 °C.

How cold does it get in winter?

Nights average 25 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Batam?

December, averaging 302 mm over 25 days with rain. The driest month is February with 96 mm. The year as a whole averages 2,313 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 Batam 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
Data point: 1.149°, 104.025° (the coordinates the reanalysis values are taken for)
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.