Weather in January
In Shizunai, Japan, in January, the average water temperature is 4.4°C (39.9°F). Note: In terms of swimming, this condition is dangerously life-threatening. Weather in January »
Weather in February
February and March, with an average sea temperature of 2°C (35.6°F), are months with the coldest seawater in Shizunai, Japan. Note: When swimming, this is deemed life-endangering and extremely risky. Weather in February »
Weather in March
The months with the coldest seawater in Shizunai, Japan, are February and March, with an average sea temperature of 2°C (35.6°F). Note: During swimming, this circumstance is both life-threatening and incredibly perilous. Weather in March »
Weather in April
In April, the average sea temperature in Shizunai, Japan, is 4.3°C (39.7°F). Note: In the water-based sport of swimming, this state is life-threatening and exceedingly dangerous. Weather in April »
Weather in May
In Shizunai, Japan, in May, the average water temperature is 7.3°C (45.1°F). Note: Swimming in 7.3°C (45.1°F) at temperatures under 10°C (50°F) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Weather in May »
Weather in June
In Shizunai, Japan, in June, the average water temperature is 12.8°C (55°F). Note: Entering waters of 12.8°C (55°F) is life-endangering. A mere moment in 13°C (55.4°F) waters feels piercing cold, and below 10°C (50°F) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience. Weather in June »
Weather in July
In July, the average sea temperature in Shizunai, Japan, is 16.8°C (62.2°F). Note: Most people do not enjoy swimming in water that is 16.8°C (62.2°F). Weather in July »
Weather in August
The month with the warmest seawater in Shizunai, Japan, is August, with an average sea temperature of 20.4°C (68.7°F). Note: A surface water temperature of 20.4°C (68.7°F) does not provide an enjoyable swimming experience for most. Weather in August »
Weather in September
In Shizunai, Japan, the average seawater temperature in September is 20.1°C (68.2°F). Note: Most people do not enjoy swimming in water of 20.1°C (68.2°F). Weather in September »
Weather in October
In Shizunai, Japan, the average seawater temperature in October is 16.6°C (61.9°F). Note: For most, swimming in 16.6°C (61.9°F) is not an enjoyable activity. Weather in October »
Weather in November
In Shizunai, Japan, the average seawater temperature in November is 12.9°C (55.2°F). Note: If planning to swim in 12.9°C (55.2°F) under 10°C (50°F), wear a protective suit. Weather in November »
Weather in December
In Shizunai, Japan, in December, the average water temperature is 8.2°C (46.8°F). Note: It is life-risking to swim in 8.2°C (46.8°F). Briefly staying in 13°C (55.4°F) waters feels unsettling, and temperatures below 10°C (50°F) might result in cold shock and loss of breath control, hinging on personal endurance. Weather in December »
Frequently asked questions
What are the months with the coldest sea water in Shizunai?
February and March, with an average sea temperature of 2°C (35.6°F), are months with the coldest seawater in Shizunai, Japan.
When are the longest days in Shizunai?
With an average of 15h and 12min of daylight, June has the longest days of the year in Shizunai, Japan.
What is the month with the warmest sea water in Shizunai?
The month with the warmest seawater in Shizunai, Japan, is August, with an average sea temperature of 20.4°C (68.7°F).
What is the month with the shortest days in Shizunai?
December has the shortest days of the year in Shizunai, with an average of 9h and 6min of daylight.
Is there Daylight Saving Time (DST) in Shizunai?
Shizunai does not utilize Daylight Saving Time (DST). JST timezone is used over the entire year.
Average sea temperature
Shizunai, Japan
The best month for swimming (with the highest average sea temperature) is August (20.4°C).
The coldest months (with the lowest average sea temperature) are February and March (2°C).
Average daylight
Shizunai, Japan
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
Shizunai, Japan
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