Dumai
Indonesia
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Dumai, Indonesia

The best months for a swim in Dumai, Indonesia, are January through April, July through December, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.
The ideal sea water temperature of 28.4°C (83.1°F) make January the best time for swimming and other water activities in Dumai, Indonesia. With an average sea temperature of 28.4°C (83.1°F), January is the month with the coldest seawater. Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in January »

The ideal sea water temperature of 28.9°C (84°F) make February the best time for swimming and other water activities in Dumai, Indonesia. In February, the average sea temperature is 28.9°C (84°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in February »

The ideal sea water temperature of 29.3°C (84.7°F) make March the best time for swimming and other water activities in Dumai, Indonesia. In Dumai, Indonesia, the average seawater temperature is 29.3°C (84.7°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in March »

The ideal sea water temperature of 29.9°C (85.8°F) make April the best time for swimming and other water activities in Dumai, Indonesia. In Dumai, the average seawater temperature in April is 29.9°C (85.8°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in April »

May and June, with an average sea temperature of 30.2°C (86.4°F), are months with the warmest seawater in Dumai, Indonesia. Note: For swimming, other intense water activities, temperature above 30°C (86°F) is arguably unpleasant, as the water cooling effect is missing. Weather in May »

May and June, with an average sea temperature of 30.2°C (86.4°F), are months with the warmest seawater in Dumai, Indonesia. Note: The water temperature above 30°C (86°F) is arguably regarded as unpleasant. Weather in June »

The ideal sea water temperature of 29.9°C (85.8°F) make July the best time for swimming and other water activities in Dumai, Indonesia. In Dumai, the average seawater temperature is 29.9°C (85.8°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in July »

The ideal sea water temperature of 29.4°C (84.9°F) make August the best time for swimming and other water activities in Dumai, Indonesia. In Dumai, the average water temperature is 29.4°C (84.9°F). Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. Weather in August »

The ideal sea water temperature of 29.4°C (84.9°F) make September the best time for swimming and other water activities in Dumai, Indonesia. In Dumai, Indonesia, the average water temperature is 29.4°C (84.9°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in September »

The ideal sea water temperature of 29.7°C (85.5°F) make October the best time for swimming and other water activities in Dumai, Indonesia. In October, the average sea temperature is 29.7°C (85.5°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in October »

The ideal sea water temperature of 29.5°C (85.1°F) make November the best time for swimming and other water activities in Dumai, Indonesia. In November, the average sea temperature is 29.5°C (85.1°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in November »

The ideal sea water temperature of 29.3°C (84.7°F) make December the best time for swimming and other water activities in Dumai, Indonesia. In Dumai, in December, the average water temperature is 29.3°C (84.7°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in December »

When is the sea coldest in Dumai?

With an average sea temperature of 28.4°C (83.1°F), January is the month with the coldest seawater in Dumai, Indonesia.

What is the month with the shortest days in Dumai?

January, November and December, with an average of 12h of daylight, are months with the shortest days in Dumai, Indonesia.

When are the longest days in Dumai?

April through August, with an average of 12.2h of daylight, are months with the longest days.

What are the months with the warmest sea water in Dumai?

Months with the warmest seawater are May and June, with an average sea temperature of 30.2°C (86.4°F).
Average sea temperature - Dumai, Indonesia

Best months for swimming (with the highest average sea temperature) are May and June (30.2°C).
The coldest month (with the lowest average sea temperature) is January (28.4°C).

Average daylight - Dumai, Indonesia

Months with the longest days are April, May, June, July and August (Average daylight: 12.2h).
Months with shortest days are January, November and December (Average daylight: 12h).