Iyo
Japan
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Iyo, Japan

The best months for a swim in Iyo, Japan, are July through September, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.

In Iyo, Japan, the average seawater temperature in January is 15.8°C (60.4°F). Note: Swimming in 15.8°C (60.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in January »

February is the month with the coldest seawater in Iyo, Japan, with an average sea temperature of 14.7°C (58.5°F). Note: Swimming in 14.7°C (58.5°F) is considered life-threatening. Weather in February »

In Iyo, Japan, the average seawater temperature in March is 14.8°C (58.6°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in March »

In April, the average sea temperature in Iyo, Japan, is 16.5°C (61.7°F). Note: For swimming, a surface water temperature of 16.5°C (61.7°F) is not enjoyable for the majority. Weather in April »

In May, the average sea temperature in Iyo, Japan, is 19.2°C (66.6°F). Note: Swimming in 19.2°C (66.6°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in May »

In Iyo, Japan, in June, the average water temperature is 22.6°C (72.7°F). Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. Weather in June »

The ideal sea water temperature of 25.6°C (78.1°F) make July the best time for swimming and other water activities in Iyo, Japan. In Iyo, the average seawater temperature is 25.6°C (78.1°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 July »

The ideal sea water temperature of 27.2°C (81°F) make August the best time for swimming and other water activities in Iyo, Japan. The month with the warmest seawater is August, with an average sea temperature of 27.2°C (81°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 August »

The ideal sea water temperature of 26.3°C (79.3°F) make September the best time for swimming and other water activities in Iyo, Japan. In Iyo, the average seawater temperature in September is 26.3°C (79.3°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 September »

In Iyo, Japan, in October, the average water temperature is 24.1°C (75.4°F). Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. Weather in October »

In Iyo, Japan, the average seawater temperature in November is 21.4°C (70.5°F). Note: Swimming in 21.4°C (70.5°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in November »

In December, the average sea temperature in Iyo, Japan, is 18.3°C (64.9°F). Note: For most, swimming in 18.3°C (64.9°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F). Weather in December »

What month is the sea coldest in Iyo?

The month with the coldest seawater in Iyo, Japan, is February, with an average sea temperature of 14.7°C (58.5°F).

When are the longest days in Iyo?

The month with the longest days in Iyo, Japan, is June, with an average of 14.4h of daylight.

What month is the sea warmest in Iyo?

The month with the warmest seawater in Iyo is August, with an average sea temperature of 27.2°C (81°F).

What is the month with the shortest days in Iyo?

The month with the shortest days is December, with an average of 9.9h of daylight.
Average sea temperature - Iyo, 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 (14.7°C).

Average daylight - Iyo, Japan

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).