Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Toyama, Japan

The ideal sea water temperature of 25.5°C (77.9°F) make September the best time for swimming and other water activities in Toyama, Japan.

Sea temperature

In Toyama, Japan, the average water temperature is 25.5°C (77.9°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.


The average length of the day in September in Toyama is 12.4h.

What is the sea water temperature in September in Toyama?

In September, the average sea temperature is 25.5°C (77.9°F). 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.

How many hours of daylight does Toyama have in September?

In September, the average length of the day is 12.4h.
Average sea temperature in September - Toyama, Japan
  • Average sea temperature in September: 25.5°C

The best month for swimming (with the highest average sea temperature) is August (27°C).
The coldest month (with the lowest average sea temperature) is March (10.8°C).

Average daylight in September - Toyama, Japan
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).