Climate and monthly weather forecastKasaoka, Japan
Climate and monthly weather forecast
The best time to visit Kasaoka
The best months for a swim in Kasaoka, Japan, are July through September, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.Weather in January
In January, the average sea temperature in Kasaoka, Japan, is 15°C (59°F). Note: The enjoyment of swimming decreases for most when the surface water temperature is 15°C (59°F). Weather in January »Weather in February
February is the month with the coldest seawater in Kasaoka, Japan, with an average sea temperature of 13.7°C (56.7°F). Note: It is advised against swimming in 13.7°C (56.7°F) when it drops below 10°C (50°F). Weather in February »Weather in March
In March, the average sea temperature in Kasaoka, Japan, is 13.8°C (56.8°F). Note: Beware when you're in 13.8°C (56.8°F) waters; 13°C (55.4°F) is chilling and anything below 10°C (50°F) could cause breathing hindrance and a sudden cold shock, given your physical condition. Weather in March »Weather in April
In Kasaoka, Japan, in April, the average water temperature is 15.4°C (59.7°F). Note: In 15.4°C (59.7°F), swimming is not an enjoyable activity for most. Weather in April »Weather in May
In Kasaoka, Japan, the average seawater temperature in May is 18.1°C (64.6°F). Note: For most people, a water temperature of 18.1°C (64.6°F) is not conducive to enjoyable swimming. Weather in May »Weather in June
In Kasaoka, Japan, in June, the average water temperature is 21.9°C (71.4°F). Note: For swimming, a surface water temperature of 21.9°C (71.4°F) is not enjoyable for the majority. Weather in June »Weather in July
The perfect water temperature of 25.3°C (77.5°F) makes July a great period for swimming and other water activities in Kasaoka, Japan. In July, the average sea temperature is 25.3°C (77.5°F). Note: For swimming, diving, or other water activities, the temperature range of 25°C (77°F) to 29°C (84.2°F) is perceived as exceptionally enjoyable and comfortable even for prolonged periods. Weather in July »Weather in August
An excellent water temperature of 27.2°C (81°F) makes August in Kasaoka, Japan, a prime for swimming and other water activities. With an average sea temperature of 27.2°C (81°F), August is the month with the warmest seawater. Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods. Weather in August »Weather in September
The perfect water temperature of 26°C (78.8°F) makes September a great period for swimming and other water activities in Kasaoka, Japan. In September, the average sea temperature is 26°C (78.8°F). Note: Water temperatures from 25°C (77°F) to 29°C (84.2°F) make swimming, diving, and similar activities highly pleasurable and enjoyable for long periods without discomfort. Weather in September »Weather in October
In October, the average sea temperature in Kasaoka, Japan, is 23.7°C (74.7°F). Note: While a person's sensitivity to cold is personal, factors like sunshine, wind, and the temperature can influence their comfort in 23.7°C (74.7°F) waters. Weather in October »Weather in November
In November, the average sea temperature in Kasaoka, Japan, is 20.9°C (69.6°F). Note: Swimming in water at 20.9°C (69.6°F) is not a pleasurable experience for most. Weather in November »Weather in December
In Kasaoka, Japan, in December, the average water temperature is 17.7°C (63.9°F). Note: For most individuals, swimming in 17.7°C (63.9°F) is not a pleasant experience. Weather in December »Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
February is the month with the coldest seawater, with an average sea temperature of 13.7°C (56.7°F).
With an average of 14h and 24min of daylight, June has the longest days of the year in Kasaoka, Japan.
With an average sea temperature of 27.2°C (81°F), August is the month with the warmest seawater in Kasaoka.
The month with the shortest days in Kasaoka, Japan, is December, with an average of 9h and 54min of daylight.
Kasaoka does not utilize Daylight Saving Time (DST). JST timezone is used throughout the entire year.
Average sea temperature
Kasaoka, Japan
The best month for swimming (with the highest average sea temperature) is August (27.2°C).
The coldest month (with the lowest average sea temperature) is February (13.7°C).
Average daylight
Kasaoka, Japan
- Average daylight in January:
10h and 6min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 12min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).





