Seto Inland Sea, Japan: What to pack, what to wear, and when to go [2021]

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Traveling to Seto Inland Sea, Japan? If you're planning to go to Seto Inland Sea, this is some important information about when to go, what to wear, and what to pack.

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When to go to Seto Inland Sea, Japan

Based on the climate and weather in Seto Inland Sea, the best time to go is October. See below for details.

Important esssentials for Seto Inland Sea, Japan

Here are some general tips on what to wear in Seto Inland Sea, as well as several items to remember to pack when traveling there.

What to wear/what to pack for Seto Inland Sea, Japan by month

January

In January, Seto Inland Sea can be very chilly. Temperatures routinely are in the low 50s F (low 10s C) range.

At night, lows are in the 30s F (single digits C). This is also a rainy time for Seto Inland Sea, with more than half of the days of the month having rain.

What to wear/what to pack:

February

If you go to Seto Inland Sea in February, you will notice that it is pretty cool. Daytime temperatures are in the 50s F (low 10s C).

What to wear/what to pack:

March

In March, Seto Inland Sea is crisp. Temperatures routinely are in the high 50s F (mid 10s C) range.

At night, lows are in the 40s F (single digits C). This is also a rainy time for Seto Inland Sea, with more than half of the days of the month having rain.

What to wear/what to pack:

April

In April, Seto Inland Sea is mild. Temperatures routinely are in the 60s F (high 10s C) range.

At night, lows are in the low 50s F (low 10s C). This is also a rainy time for Seto Inland Sea, with several of the days of the month having rain.

What to wear/what to pack:

May

If you visit Seto Inland Sea during May, you might notice that it is a perfect temperature.

Temperatures tend to hover around the low 70s F (low 20s C) during the day, while at night they can dip into the low 60s F (mid 10s C).

What to wear/what to pack:

June

June in Seto Inland Sea is pretty consistently hot. The rain can amount to several inches/centimeters. During this time, temperatures average in the 70s F (low 20s C) to low 80s F (high 20s C).

What to wear/what to pack:

July

If you vacation in Seto Inland Sea during July, you might see that it is consistently hot.

Temperatures tend to hover around the 80s F (low 30s C) during the day, while at night they can dip into the low 70s F (low 20s C).

What to wear/what to pack:

August

August in this region is extremely hot. Temperatures average in the 80s F (low 30s C) during the day.

What to wear/what to pack:

September

If you are traveling to Seto Inland Sea in September, you will notice that it is hot. Daytime temperatures are in the low 80s F (high 20s C).

What to wear/what to pack:

October

If you go to Seto Inland Sea in October, you will notice that it is a perfect temperature. Daytime temperatures are in the low 70s F (low 20s C).

What to wear/what to pack:

November

November in Seto Inland Sea can be chilly. The average overnight temperatures in the area are in the low 50s F (single digits C).

What to wear/what to pack:

December

December here is relatively cool. Temperatures average in the 50s F (low 10s C) during the day.

What to wear/what to pack:

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