Surabaya
Indonesia
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Surabaya, Indonesia

Panoramic view of the skyscrapers making the cityscape of Surabaya in East Java, Indonesia
Panoramic view of the skyscrapers making the cityscape of Surabaya in East Java, Indonesia
The best months for a swim in Surabaya, Indonesia, are August through October, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.
January, like December, is a hot summer month in Surabaya, Indonesia, with average temperature varying between 31.8°C (89.2°F) and 24.1°C (75.4°F). In January, the average high-temperature is essentially the same as in December - a still tropical 31.8°C (89.2°F). Weather in January »

The last month of the summer, February, is also a hot month in Surabaya, Indonesia, with average temperature ranging between max 31.5°C (88.7°F) and min 24.2°C (75.6°F). In February, the average high-temperature is essentially the same as in January - a still hot 31.5°C (88.7°F). Weather in February »

March, the first month of the autumn, in Surabaya, is still a tropical month, with average temperature fluctuating between 24°C (75.2°F) and 31.6°C (88.9°F). In Surabaya, Indonesia, the average high-temperature in March is practically the same as in February - a still tropical 31.6°C (88.9°F). Weather in March »

April, like March, is another hot autumn month in Surabaya, Indonesia, with average temperature ranging between min 24.8°C (76.6°F) and max 31.4°C (88.5°F). In April, the average high-temperature is relatively the same as in March - a still hot 31.4°C (88.5°F). Weather in April »

May, the last month of the autumn, in Surabaya, is also a hot month, with temperature in the range of an average high of 31.6°C (88.9°F) and an average low of 24.1°C (75.4°F). In May, the average high-temperature is relatively the same as in April - a still tropical 31.6°C (88.9°F). Weather in May »

The first month of the winter, June, is also a hot month in Surabaya, Indonesia, with temperature in the range of an average low of 23.5°C (74.3°F) and an average high of 31.2°C (88.2°F). In June, the average high-temperature is essentially the same as in May - a still tropical 31.2°C (88.2°F). Weather in June »

July, like June, is another tropical winter month in Surabaya, Indonesia, with average temperature varying between 23°C (73.4°F) and 31.3°C (88.3°F). In Surabaya, Indonesia, the average high-temperature in July is relatively the same as in June - a still tropical 31.3°C (88.3°F). Weather in July »

The last month of the winter, August, is another tropical month in Surabaya, Indonesia, with average temperature fluctuating between 22.5°C (72.5°F) and 30.1°C (86.2°F). The ideal sea water temperature of 27.8°C (82°F) and only 3 rainfall days, with 15mm (0.6") of accumulated rainfall, make August the best time for swimming and other water activities. Weather in August »

September, the first month of the spring, in Surabaya, is still a hot month, with average temperature ranging between max 32.7°C (90.9°F) and min 22.9°C (73.2°F). The ideal sea water temperature of 28.1°C (82.6°F) and only 4 rainfall days, with 17mm (0.7") of accumulated rainfall, make September the best time for swimming and other water activities. Weather in September »

October, the same as September, in Surabaya, Indonesia, is another tropical spring month, with average temperature ranging between max 33.4°C (92.1°F) and min 23.7°C (74.7°F). The ideal sea water temperature of 28.9°C (84°F) and only 5 rainfall days, with 47mm (1.9") of accumulated rainfall, make October the best time for swimming and other water activities. Weather in October »

November, the last month of the spring, in Surabaya, is also a hot month, with average temperature ranging between max 33.1°C (91.6°F) and min 24.1°C (75.4°F). In November, the average high-temperature is practically the same as in October - a still tropical 33.1°C (91.6°F). Weather in November »

December, the first month of the summer, in Surabaya, is also a hot month, with average temperature varying between 31.9°C (89.4°F) and 23.8°C (74.8°F). In Surabaya, Indonesia, the average high-temperature is practically the same as in November - a still hot 31.9°C (89.4°F). Weather in December »

How many days does it rain in Surabaya?

In Surabaya, Indonesia, during the entire year, the rain falls for 147 days and collects up to 1751mm (68.9") of precipitation.

What is the rainiest month in Surabaya?

January is the month with the most rainfall. Rain falls for 17 days and accumulates 327mm (12.9") of precipitation.

When are the longest days in Surabaya?

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

What is the month with the least sunshine in Surabaya?

Months with the least sunshine are January through March, with an average of 7h of sunshine.

When is the highest UV index in Surabaya?

Months with the highest UV index are January through April, August through December, with an average maximum UV index of 12.

What is the month with the shortest days in Surabaya?

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

When is the lowest UV index in Surabaya?

Months with the lowest UV index in Surabaya, Indonesia, are June and July, with an average maximum UV index of 10.

What are the months with the most sunshine in Surabaya?

July through September, with an average of 11h of sunshine, are months with the most sunshine.

What is the coldest month in Surabaya?

The coldest month in Surabaya, Indonesia, is August, with an average high-temperature of 30.1°C (86.2°F) and an average low-temperature of 22.5°C (72.5°F).

What is the driest month in Surabaya?

August is the month with the least rainfall in Surabaya, Indonesia. Rain falls for 3 days and accumulates 15mm (0.6") of precipitation.

What month is the sea coldest in Surabaya?

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

What is the warmest month in Surabaya?

The warmest month in Surabaya, Indonesia, is October, with an average high-temperature of 33.4°C (92.1°F) and an average low-temperature of 23.7°C (74.7°F).

When is the sea warmest in Surabaya?

December is the month with the warmest seawater in Surabaya, Indonesia, with an average sea temperature of 30.2°C (86.4°F).
Average temperature - Surabaya, Indonesia
Average rainfall - Surabaya, Indonesia
Average rainfall days - 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).

Average daylight / Average sunshine - Surabaya, Indonesia

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

Months with most sunshine are July, August and September (Average sunshine: 11h).
Months with least sunshine are January, February and March (Average sunshine: 7).

Average UV index - Surabaya, Indonesia

Months with the highest UV index are January, February, March, April, August, September, October, November and December (UV index 12).
Months with the lowest UV index are June and July (UV index 10).