Seto Inland Sea, Japan: What to pack, what to wear, and when to go [2022]
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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
- When to go to Seto Inland Sea
- Important essentials for Seto Inland Sea
- Activities for Seto Inland Sea
- Seto Inland Sea in January: weather and what to pack
- Seto Inland Sea in February: weather and what to pack
- Seto Inland Sea in March: weather and what to pack
- Seto Inland Sea in April: weather and what to pack
- Seto Inland Sea in May: weather and what to pack
- Seto Inland Sea in June: weather and what to pack
- Seto Inland Sea in July: weather and what to pack
- Seto Inland Sea in August: weather and what to pack
- Seto Inland Sea in September: weather and what to pack
- Seto Inland Sea in October: weather and what to pack
- Seto Inland Sea in November: weather and what to pack
- Seto Inland Sea in December: weather and what to pack

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
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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
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Power bank for devices
A portable power bank, like this one
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For families with young children
-
Money/passport pouch
A money pouch is vital for protecting your passport and credit cards.
-
Voice and data SIM card
A SIM card that works in Seto Inland Sea. A good global SIM card works in most countries, but check the country list before buying. In some more rural areas you may need a satellite phone. We recommend this satellite phone.
-
Airplane or car necessities
-
Plug adapter
A plug adapter that supports outlet types A and B. This one works in most places, but you should check with your hotel.
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:
-
Fleece
-
Warm pants or jeans
-
Lip balm
In our opinion, the best option: this
-
Extra socks
-
Jacket or coat
-
Light gloves or mittens
-
Standard footwear
-
A rain coat to layer with another jacket
-
100% waterproof footwear
We use these rain boots:
-
Rain pants
These can be essential in heavy rain.
-
Waterproof phone bag
-
Windproof umbrella
This one is a great option.
-
Waterproof bag/luggage cover
So your things remain dry. We like:
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:
-
Fleece
-
Light gloves or mittens
-
Jacket or coat
-
Warm pants or jeans
-
Lip balm
In our opinion, the best choice: here
-
Extra socks
-
Standard footwear
-
A rain coat to layer with a coat
-
100% waterproof footwear
We suggest rain boots:
-
Rain pants
Rain pants will be essential in a storm.
-
Waterproof phone bag
-
Umbrella
This one is a great one to buy.
-
Waterproof bag/luggage cover
So your things remain dry. We recommend:
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:
-
Extra socks
-
Light and heavy skirts
-
Long sleeve shirts or blouses
-
Standard footwear
-
Dresses
-
Pants or jeans
-
Light jacket or fleece
-
A rain poncho to layer with another jacket
-
100% waterproof footwear
We recommend these rain boots:
-
Rain pants
These pants can be vital in a storm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is a great option.
-
Waterproof bag/luggage cover
So your suitcases remain dry. We suggest:
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:
-
Dresses
-
Long sleeve shirts or blouses
-
Pants or jeans
-
Light jacket or fleece
-
Standard footwear
-
Extra socks
-
Light and heavy skirts
-
A rain poncho to layer with a coat
-
100% waterproof footwear
We like these rain boots:
-
Rain pants
These pants will be essential in heavy rain.
-
Waterproof phone bag
-
Umbrella
This one is a perfect one to buy.
-
Waterproof bag/luggage cover
So your belongings remain dry. We like:
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:
-
Short pants or heavy shorts
-
Sunscreen lotion
-
Light skirts
-
Light dresses
You can find some great options here
-
Long and short sleeve shirts
-
Bug repellent
-
Extra socks
-
Breathable footwear or sandals
-
Sandals
-
Beach necessities
If you're going to the beach:
-
A rain poncho to layer with another jacket
-
100% waterproof footwear
We like rain boots:
-
Rain pants
These will be essential in a rainstorm.
-
Waterproof phone bag
-
Umbrella
This one is an excellent option.
-
Waterproof bag/luggage cover
So your bags stay dry. We like:
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:
-
Long and short sleeve shirts
-
Light dresses
You can find some great options here
-
Sandals
-
Extra socks
-
Breathable footwear or sandals
-
Short pants or heavy shorts
-
Light skirts
-
Bug repellent
-
Sunscreen lotion
-
Beach necessities
If you're going to the beach:
-
A rain poncho to layer with another jacket
-
100% waterproof footwear
We use these rain boots:
-
Rain pants
Rain pants will be vital in a rainstorm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is a perfect choice.
-
Waterproof bag/luggage cover
So your bags stay dry. We suggest:
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:
-
Sunglasses
-
Insulated water bottle
Our best choice:
-
Cool and dry dresses
These dresses can provide UV protection and keep you cool.
-
Waterproof sandals
-
Skirts
-
Breatheable shirts
A breatheable shirt can make you comfortable and guard against skin damage:
-
Loose-fit shorts
-
Bug repellent
-
Sunscreen lotion, moderate SPF
-
If you're going to the beach
-
A rain jacket to layer with another jacket
-
100% waterproof footwear
We recommend rain boots:
-
Rain pants
These can be a lifesaver in a storm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is a perfect choice.
-
Waterproof bag/luggage cover
So your bags don't get wet. We suggest:
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:
-
Breatheable shirts
A cooling shirt can keep you cool and guard against UV rays:
-
Sunglasses
-
Loose-fit shorts
-
Cool and dry dresses
These dresses can provide UV protection and cool you.
-
Skirts
-
Insulated water bottle
Our pick:
-
Bug repellent
-
Waterproof sandals
-
Sunscreen lotion, moderate SPF
-
If you're going to the beach
-
A rain jacket to layer with a jacket
-
100% waterproof footwear
We use rain boots:
-
Rain pants
These pants are essential in a storm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is a perfect choice.
-
Waterproof bag/luggage cover
So your things don't get wet. We like:
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:
-
Insulated water bottle
Our choice:
-
Skirts
-
Waterproof sandals
-
Loose-fit shorts
-
Cool and dry dresses
These dresses can provide UV protection and help you stay cool.
-
Sunscreen lotion, moderate SPF
-
Sunglasses
-
Bug repellent
-
Breatheable shirts
A good breatheable shirt can make you comfortable and guard against skin damage:
-
If you're going to the beach
-
A rain coat to layer with another jacket
-
100% waterproof footwear
We use these rain boots:
-
Rain pants
Rain pants will be a lifesaver in heavy rain.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is a perfect option.
-
Waterproof bag/luggage cover
So your suitcases don't get wet. We recommend:
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:
-
Light skirts
-
Bug repellent
-
Short pants or heavy shorts
-
Long and short sleeve shirts
-
Sandals
-
Sunscreen lotion
-
Light dresses
You can find some great options here
-
Breathable footwear or sandals
-
Extra socks
-
Beach necessities
If you're going to the beach:
-
A rain coat to layer with a coat
-
100% waterproof footwear
We suggest these rain boots:
-
Rain pants
These pants will be essential in a rainstorm.
-
Waterproof phone bag
-
Umbrella
This one is an excellent one to buy.
-
Waterproof bag/luggage cover
So your belongings stay dry. We recommend:
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:
-
Long sleeve shirts or blouses
-
Pants or jeans
-
Dresses
-
Standard footwear
-
Extra socks
-
Light and heavy skirts
-
Light jacket or fleece
-
A rain jacket to layer with a jacket
-
100% waterproof footwear
We recommend these rain boots:
-
Rain pants
Rain pants can be essential in heavy rain.
-
Waterproof phone bag
-
Windproof umbrella
This one is an excellent choice.
-
Waterproof bag/luggage cover
So your belongings remain dry. We suggest:
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:
-
Jacket or coat
-
Lip balm
In our opinion, the best is: this
-
Extra socks
-
Light gloves or mittens
-
Warm pants or jeans
-
Fleece
-
Standard footwear
-
A rain poncho to layer with a jacket
-
100% waterproof footwear
We use these rain boots:
-
Rain pants
These can be essential in a rainstorm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is a great option.
-
Waterproof bag/luggage cover
So your suitcases remain dry. We suggest:
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