When to go · Indonesia

When to go to Surabaya

Twelve months of averages for Surabaya, and what they say about when to go.

When to go

What the averages say

Mean daily highs and lows and the month's rain, averaged over 2001 to 2020.

On these averages, Surabaya has a mean high between 18°C and 32°C and under 150 mm of rain in May to July.

Hot months (a mean high of 32°C or more): August to November.
Wet months (150 mm of rain or more): December to April.
Humid months (a high of 25°C or more with relative humidity of 70% or more): November to July.
The warmest month is September (33°C) and the coolest February (29°C). The wettest is January (337 mm) and the driest August (11 mm); about 1,882 mm of rain falls in a year.

How these sentences are worded

Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.

Surabaya: highs, lows and rainHighLowRain

The year at a glance

Mild to warm and dry
Mild to warm, humid or showery
Hot
Cool
Wet
Cold

JanWet
FebWet
MarWet
AprWet
MayMild–warm, mixed
JunMild–warm, mixed
JulMild–warm, mixed
AugHot
SeptHot
OctHot
NovHot
DecWet

Month by month

Every month in Surabaya

The whole year, with humidity, cloud and the sunlight reaching the ground.

Climate in Surabaya by month: mean daily high and low, rain, and what the month is like
Month	High	Low	Rain	Humidity	Cloud	Sunlight (kWh/m²/day)	High in Dubai	What it is like
January	29°C	26°C	337 mm	85%	90%	4.9	23°C	Wet
February	29°C	25°C	316 mm	86%	88%	4.9	24°C	Wet
March	29°C	26°C	272 mm	84%	84%	5.1	27°C	Wet
April	30°C	26°C	193 mm	82%	76%	5	31°C	Wet
May	30°C	26°C	123 mm	80%	61%	4.9	35°C	Mild to warm, humid or showery
June	30°C	25°C	74 mm	77%	52%	4.8	37°C	Mild to warm, humid or showery
July	31°C	24°C	35 mm	72%	45%	5.1	39°C	Mild to warm, humid or showery
August	32°C	24°C	11 mm	65%	39%	5.7	39°C	Hot
September	33°C	25°C	18 mm	61%	40%	6.2	37°C	Hot
October	33°C	26°C	63 mm	64%	58%	6.1	34°C	Hot
November	32°C	27°C	140 mm	73%	78%	5.4	29°C	Hot
December	30°C	26°C	300 mm	82%	91%	4.8	25°C	Wet

The Dubai column is Dubai's mean daily high, for comparison.

Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.

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Plan a trip to Surabaya More about Surabaya When to go

Month

High

Low

Rain

Humidity

Cloud

Sunlight (kWh/m²/day)

High in Dubai

What it is like

January

29°C

26°C

337 mm

85%

90%

4.9

23°C

Wet

February

29°C

25°C

316 mm

86%

88%

4.9

24°C

Wet

March

29°C

26°C

272 mm

84%

5.1

27°C

Wet

April

30°C

26°C

193 mm

82%

76%

31°C

Wet

May

30°C

26°C

123 mm

80%

61%

4.9

35°C

Mild to warm, humid or showery

June

30°C

25°C

74 mm

77%

52%

4.8

37°C

Mild to warm, humid or showery

July

31°C

24°C

35 mm

72%

45%

5.1

39°C

Mild to warm, humid or showery

August

32°C

24°C

11 mm

65%

39%

5.7

39°C

Hot

September

33°C

25°C

18 mm

61%

40%

6.2

37°C

Hot

October

33°C

26°C

63 mm

64%

58%

6.1

34°C

Hot

November

32°C

27°C

140 mm

73%

78%

5.4

29°C

Hot

December

30°C

26°C

300 mm

82%

91%

4.8

25°C

Wet