Swimming in Dumai in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Dumai in september 2025.
In september, according to seasonal norms, the sea temperature in Dumai is:
Minimum: 83°F
Average: 86°F
Maximum: 87°F
Other useful seasonal weather averages in september:
- Outside temperature: 77°F to 91°F
- Most common weather: "Moderate rain at times"
- The wind blows at 15.5mph
- It rains a total of 8.8in, over 16 day(s).
Should we swim in Dumai in september?
Yes! The water temperature in Dumai in september is ideal
In september, swimming is ideal on the beaches around Dumai! With water reaching 87°F at most and 86°F on average, spending time in the water is very pleasant.
Note also that in september, the climate is tolerable with an average outside temperature of 84°F, 8.7in of precipitation (over 16 days) and 91.29 % humidity.
Water and normal seasonal temperatures in Dumai in september
| September | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 92°F | ||
| Minimum outside temperature | 77°F | ||
| Wind speed | 4.4mph | ||
| Wind temperature | 77°F | ||
| Precipitation | 8.8in | ||
| Number of days of rain | 16 jour(s) (52%) | ||
| Humidity | 92% | ||
| Visibility in kilometers | 8.85km | ||
| Cloud cover | 43% | ||
| Our opinion | ideal swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Dumai
Swim elsewhere on the island of Sumatra in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Banda Aceh in september | 85°F | 86°F | ideal swimming | Bandar Lampung in september | 84°F | 86°F | ideal swimming | Bengkulu in september | 83°F | 88°F | ideal swimming | Gunungsitoli (Pulau Nias) in september | 85°F | 87°F | ideal swimming | Padang City in september | 85°F | 88°F | ideal swimming | Batam in september | 86°F | 87°F | ideal swimming |
Swim on the island of Sumatra in september: sea temperature by city