Bitung climate

Name: Bitung
Address: ID

Bitung is warmest in October, with average highs of 30 °C, and coldest in February, when nights average 25 °C. May is the wettest month (326 mm) and August the driest (138 mm). Figures are 1991–2020 climate normals.

Across a full year Bitung averages 2,894 mm of rain and 365 days above 25 °C.

Indonesia · population 225,134 · 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 October 30 °C
Coldest month February 25 °C
Driest month August 138 mm
Wettest month May 326 mm
Least cloud August 65 % cloud
Hottest on record April 48 °C
Coldest on record September 22 °C
Warmest sea May 29 °C

What to expectBitung through the year

Bitung 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, 52 of them reach 30 °C. The warmest reading in the 1991–2020 record is 48 °C, in April.

Rain is strongly seasonal. May averages 326 mm against 138 mm in August — 2.4 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Bitung is warmest in May at 29 °C and coldest in August 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	28.8 °C	249 mm	86 %
February	28.9 °C	231 mm	84 %
March	29.2 °C	230 mm	80 %
April	29.5 °C	280 mm	78 %
May	29.3 °C	326 mm	75 %
June	28.8 °C	303 mm	75 %
July	28.4 °C	216 mm	71 %
August	28.8 °C	138 mm	65 %
September	29.5 °C	141 mm	67 %
October	29.8 °C	239 mm	74 %
November	29.6 °C	272 mm	82 %
December	29.2 °C	270 mm	86 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	28.8 °C	25.0 °C	26.6 °C	32.6 °C	22.9 °C	31	2
February	28.9 °C	25.0 °C	26.6 °C	33.3 °C	22.3 °C	28	2
March	29.2 °C	25.1 °C	26.8 °C	34.6 °C	23.3 °C	31	4
April	29.5 °C	25.1 °C	27.0 °C	47.6 °C	23.5 °C	30	6
May	29.3 °C	25.4 °C	27.1 °C	35.2 °C	23.5 °C	31	5
June	28.8 °C	25.2 °C	26.7 °C	33.5 °C	23.1 °C	30	1
July	28.4 °C	25.1 °C	26.4 °C	35.7 °C	22.9 °C	31	0
August	28.8 °C	25.1 °C	26.5 °C	30.7 °C	23.1 °C	31	1
September	29.5 °C	25.2 °C	26.9 °C	34.6 °C	21.9 °C	30	7
October	29.8 °C	25.1 °C	27.1 °C	35.3 °C	22.8 °C	31	12
November	29.6 °C	25.0 °C	27.0 °C	35.3 °C	23.2 °C	30	7
December	29.2 °C	25.2 °C	26.8 °C	33.0 °C	23.5 °C	31	4

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	249 mm	28	12 h/day	86 %	87 %	10 km/h	28.6 °C
February	231 mm	24	12 h/day	84 %	87 %	11 km/h	28.5 °C
March	230 mm	26	12 h/day	80 %	87 %	10.0 km/h	28.7 °C
April	280 mm	27	12 h/day	78 %	88 %	7.8 km/h	29.2 °C
May	326 mm	28	12 h/day	75 %	88 %	7.2 km/h	29.3 °C
June	303 mm	25	12 h/day	75 %	88 %	8.3 km/h	28.8 °C
July	216 mm	20	12 h/day	71 %	86 %	10 km/h	28.3 °C
August	138 mm	14	12 h/day	65 %	83 %	11 km/h	27.9 °C
September	141 mm	17	12 h/day	67 %	82 %	9.2 km/h	28.1 °C
October	239 mm	23	12 h/day	74 %	84 %	7.6 km/h	28.8 °C
November	272 mm	28	12 h/day	82 %	87 %	7.4 km/h	29.3 °C
December	270 mm	29	12 h/day	86 %	88 %	9.2 km/h	29.1 °C

How Bitung 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
Bitung	30 °C	25 °C	2,894 mm	365
Manado · Indonesia	31 °C	24 °C	2,978 mm	365
Gorontalo · Indonesia	31 °C	24 °C	2,129 mm	365
Ternate · Indonesia	29 °C	25 °C	2,618 mm	365
Toli-Toli · Indonesia	30 °C	23 °C	2,049 mm	365
Palu · Indonesia	31 °C	24 °C	3,588 mm	365

Where Bitung ranks

Ranking	Position	Value
Warmest sea temperatures in Asia in December	37th of 50	29 °C
Warmest sea temperatures in the world in December	44th of 50	29 °C

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

QuestionsCommon questions about Bitung’s climate

When is the best time to visit Bitung?

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

How hot does Bitung get?

In October, the warmest month, daily highs average 30 °C. About 52 days a year pass 30 °C. The highest value in the 1991–2020 record is 48 °C.

How cold does it get in winter?

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

Which month is wettest in Bitung?

May, averaging 326 mm over 28 days with rain. The driest month is August with 138 mm. The year as a whole averages 2,894 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 Bitung 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: 1.441°, 125.128° (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.