Monthly weather forecast and climate
Surabaya, Indonesia

The skyscrapers making the cityscape of Surabaya in East Java, Indonesia
The skyscrapers making the cityscape of Surabaya in East Java, Indonesia

The best time to visit Surabaya

The best months for a swim in Surabaya, Indonesia, are August and September, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.

Weather in January

January, like December, is a hot summer month in Surabaya, Indonesia, with average temperature varying between 30.1°C (86.2°F) and 25.3°C (77.5°F). January, February and July, with an average high-temperature of 30.1°C (86.2°F), are the coldest months. The average heat index is appraised at a sweltering 37.4°C (99.3°F). Weather in January »

Weather in February

February, the last month of the summer, in Surabaya, is another tropical month, with average temperature ranging between min 25.1°C (77.2°F) and max 30.1°C (86.2°F). The coldest months are January, February and July, with an average high-temperature of 30.1°C (86.2°F). In February, the average heat index is appraised at a sweltering 37.7°C (99.9°F). Weather in February »

Weather in March

March, the first month of the autumn, in Surabaya, is still a hot month, with average temperature ranging between min 25.3°C (77.5°F) and max 30.5°C (86.9°F). In Surabaya, the average high-temperature is practically the same as in February - a still tropical 30.5°C (86.9°F). Weather in March »

Weather in April

April, like March, is another tropical autumn month in Surabaya, Indonesia, with average temperature fluctuating between 30.5°C (86.9°F) and 25.6°C (78.1°F). In April, the average high-temperature remains the same as in March - a still hot 30.5°C (86.9°F). Weather in April »

Weather in May

May, the last month of the autumn, in Surabaya, is another tropical month, with average temperature ranging between min 25.7°C (78.3°F) and max 30.8°C (87.4°F). In May, the average high-temperature is practically the same as in April - a still hot 30.8°C (87.4°F). Weather in May »

Weather in June

June, the first month of the winter, in Surabaya, is still a hot month, with average temperature ranging between max 30.3°C (86.5°F) and min 24.9°C (76.8°F). In Surabaya, Indonesia, the average high-temperature in June is almost the same as in May - a still hot 30.3°C (86.5°F). Weather in June »

Weather in July

July, like June, is another tropical winter month in Surabaya, Indonesia, with temperature in the range of an average low of 24.3°C (75.7°F) and an average high of 30.1°C (86.2°F). The coldest months are January, February and July, with an average high-temperature of 30.1°C (86.2°F). The average heat index in July is appraised at a torrid 35.5°C (95.9°F). Weather in July »

Weather in August

The last month of the winter, August, is another tropical month in Surabaya, Indonesia, with average temperature ranging between max 30.8°C (87.4°F) and min 24.2°C (75.6°F). An excellent water temperature of 27.8°C (82°F) and only 3.7 rainfall days, with 4mm (0.16") of accumulated rainfall, makes August a prime for swimming and other water activities. Weather in August »

Weather in September

September, the first month of the spring, in Surabaya, is also a hot month, with average temperature ranging between max 31.7°C (89.1°F) and min 24.4°C (75.9°F). An excellent water temperature of 28.1°C (82.6°F) and only 4.1 rainfall days, with 8mm (0.31") of accumulated rainfall, makes September a prime for swimming and other water activities. Weather in September »

Weather in October

October, like September, is another tropical spring month in Surabaya, Indonesia, with average temperature varying between 26.4°C (79.5°F) and 32.9°C (91.2°F). With an average high-temperature of 32.9°C (91.2°F) and an average low-temperature of 26.4°C (79.5°F), October is the warmest month. In October, the average heat index is calculated to a blistering 40.4°C (104.7°F). Weather in October »

Weather in November

The last month of the spring, November, is another hot month in Surabaya, Indonesia, with average temperature varying between 26.5°C (79.7°F) and 32.4°C (90.3°F). In Surabaya, the average high-temperature is practically the same as in October - a still hot 32.4°C (90.3°F). Weather in November »

Weather in December

December, the first month of the summer, in Surabaya, is still a tropical month, with average temperature varying between 26.3°C (79.3°F) and 31.2°C (88.2°F). In December, the average high-temperature is relatively the same as in November - a still tropical 31.2°C (88.2°F). Weather in December »
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FAQ

What is the coldest month in Surabaya?

The coldest months are January, February and July, with an average high-temperature of 30.1°C (86.2°F).

How much does it rain in Surabaya?

Throughout the year, in Surabaya, Indonesia, there are 187.8 rainfall days, and 839mm (33.03") of precipitation is accumulated.

When are the longest days in Surabaya?

Months with the longest days are January, November and December, with an average of 12.5h of daylight.

What is the month with the least sunshine in Surabaya?

The month with the least sunshine is January, with an average of 8.1h of sunshine.

What is the month with the highest UV index in Surabaya?

Months with the highest UV index in Surabaya, Indonesia, are January through December, with an average maximum UV index of 7.

When is the lowest UV index in Surabaya?

Months with the lowest UV index in Surabaya are January through December, with an average maximum UV index of 7.

What is the most humid month in Surabaya?

The most humid month is February, with an average relative humidity of 79%.

What is the wettest month in Surabaya?

The month with the most rainfall is February when the rain falls for 25 days and typically aggregates up to 179mm (7.05") of precipitation.

What is the month with the shortest days in Surabaya?

Months with the shortest days in Surabaya are June and July, with an average of 11.7h of daylight.

What is the driest month in Surabaya?

The month with the least rainfall in Surabaya is August when the rain falls for 3.7 days and typically collects 4mm (0.16") of precipitation.

When is the sea coldest in Surabaya?

With an average sea temperature of 27.8°C (82°F), August is the month with the coldest seawater in Surabaya.

What are the months with the most sunshine in Surabaya?

August through October, with an average of 9.9h of sunshine, are months with the most sunshine in Surabaya.

What is the warmest month in Surabaya?

With an average high-temperature of 32.9°C (91.2°F) and an average low-temperature of 26.4°C (79.5°F), October is the warmest month in Surabaya, Indonesia.

What is the least humid month in Surabaya?

October is the least humid month, with an average relative humidity of 63%.

What month is the sea warmest in Surabaya?

The month with the warmest seawater is December, with an average sea temperature of 30.2°C (86.4°F).

Average temperature
Surabaya, Indonesia

Average temperature - Surabaya, Indonesia

The warmest month (with the highest average high temperature) is October (32.9°C).
Months with the lowest average high temperature are January, February and July (30.1°C).

The month with the highest average low temperature is November (26.5°C).
The coldest month (with the lowest average low temperature) is August (24.2°C).

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Average pressure
Surabaya, Indonesia

Average pressure - Surabaya, Indonesia

The month with the highest atmospheric pressure is August (1011.4mbar).
The month with the lowest atmospheric pressure is December (1008.7mbar).

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Average wind speed
Surabaya, Indonesia

Average wind speed - Surabaya, Indonesia

The windiest month (with the highest average wind speed) is August (9.9km/h).
The calmest month (with the lowest average wind speed) is April (6.3km/h).

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Average humidity
Surabaya, Indonesia

Average humidity - Surabaya, Indonesia

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is October (63%).

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Average rainfall
Surabaya, Indonesia

Average rainfall - Surabaya, Indonesia

The wettest month (with the highest rainfall) is February (179mm).
The driest month (with the least rainfall) is August (4mm).

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Average rainfall days
Surabaya, Indonesia

Average rainfall days - Surabaya, Indonesia

The month with the highest number of rainy days is January (27 days).
The month with the least rainy days is August (3.7 days).

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Average sea temperature
Surabaya, Indonesia

Average sea temperature - Surabaya, Indonesia

The best month for swimming (with the highest average sea temperature) is December (30.2°C).
The coldest month (with the lowest average sea temperature) is August (27.8°C).

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Average daylight / Average sunshine
Surabaya, Indonesia

Average daylight / Average sunshine - Surabaya, Indonesia

Months with the longest days are January, November and December (Average daylight: 12.5h).
Months with the shortest days are June and July (Average daylight: 11.7h).

Months with the most sunshine are August, September and October (Average sunshine: 9.9h).
The month with the least sunshine is January (Average sunshine: 8.1h).

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Average sunshine days
Surabaya, Indonesia

Average sunshine days - Surabaya, Indonesia

The month with the most sunshine days is August (26 days).
The month with the least sunshine days is February (2.8 days).

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Average UV index
Surabaya, Indonesia

Average UV index - Surabaya, Indonesia

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

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Average visibility
Surabaya, Indonesia

Average visibility - Surabaya, Indonesia

Months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January and February (9km).

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