Seto Inland Sea, Japan: What to pack, what to wear, and when to go [2022]

This article contains affiliate links to Amazon and other vendors. We may earn commission from purchases made through these links.

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

Contents

About your travel guide

Hi! I'm Dev. I've traveled all over the world and in my travels, I have made many packing lists. In this series, my team and I have compiled the most useful information, as well as things we couldn't live without, to help you plan your trip.


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 essentials 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.

COVID-19 ESSENTIALS FOR 2022


  • Travel insurance that includes COVID-19 coverage

    Cases are climbing again, and areas are returning to lockdown. If you or a companion get COVID-19, you may be stuck with no way home -- but travel insurance can protect you. Learn more about COVID-19 and travel insurance

  • (U.S. Residents) Telehealth COVID-19 test for entry to U.S.

    U.S. residents still need a certified COVID-19 test to return home, but it can now be via Zoom. Learn more


  • Travel disinfecting wipes

    Use these to sanitize plane and hotel surfaces.


  • N95 masks

    These N95 masks provide the best level of COVID protection you can have.


  • Kids' KN95 masks

    N95 masks aren't sold for kids. These are a good alternative (and can also be used by adults if N95 masks are not available).


  • Hand sanitizer

    This hand sanitizer is an excellent TSA-friendly option.


  • Touchless thermometer

    A touchless thermometer is important to have.


  • A vaccine card protector

    Vaccine cards often become worn. An unreadable vaccine card can cause severe consequences. This vaccine card protector helps stop that.

General health necessities


  • Emergency water purifier

    Some areas may have unreliable tap water, so it's useful to take an emergency water purifier like this one.


  • Travel first aid kit

    This one is a superb option.


  • Emergency motion sickness relief

Don't forget these

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

Already know when you're traveling?

January

In January, Seto Inland Sea is brisk. 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 brisk. Daytime temperatures are in the 50s F (low 10s C).

What to wear/what to pack:

March

March in Seto Inland Sea is crisp. The average overnight temperatures in the area are in the 40s F (single digits C).

What to wear/what to pack:

April

If you visit Seto Inland Sea during April, you may find that it is mild. Temperatures tend to hover around the 60s F (high 10s C) during the day, while at night they can dip into the low 50s F (low 10s C).

What to wear/what to pack:

May

If you visit Seto Inland Sea during May, you may find that it is warm. 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

If you visit Seto Inland Sea during June, you will probably find that it is hot. Temperatures tend to hover around the low 80s F (high 20s C) during the day, while at night they can dip into the high 60s F (low 20s C).

What to wear/what to pack:

July

July for Seto Inland Sea can be very hot. Temperatures average in the 80s F (low 30s C) during the day.

What to wear/what to pack:

August

August for Seto Inland Sea is consistently hot. Temperatures average in the 80s F (low 30s C) during the day.

What to wear/what to pack:

September

In September, Seto Inland Sea is hot. Temperatures routinely are in the low 80s F (high 20s C) range. At night, lows are in the high 60s F (low 20s 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:

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 is cool. The average overnight temperatures in the area are in the low 50s F (single digits C).

What to wear/what to pack:

December

In December, Seto Inland Sea can be chilly. Temperatures routinely are in the 50s F (low 10s C) range. At night, lows are in the high 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:

Check out our guides for these other locations: East London, South Africa, Green Bay, Wisconsin, United States of America, Legnano, Italy, Castine, Maine, United States of America, Tuktut Nogait National Park, Canada, Komatsu, Japan, Chitose, Japan, Copenhagen Airport, Denmark, Bundi, India, Granger, Washington, United States of America, and Pago Pago, American Samoa, United States of America.