Seto Inland Sea, Japan: What to pack, what to wear, and when to go [2018]

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

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.

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

January

January in Seto Inland Sea can be brisk. Temperatures average in the low 50s F (low 10s C) during the day.

What to wear/what to pack:

  • Umbrella
  • Warm pants or jeans
  • Fleeces
  • Standard footwear
  • Jacket or coat
  • Socks
  • Rain coat
  • Waterproof luggage
  • Light gloves or mittens
  • Waterproof footwear

February

In February, Seto Inland Sea is pretty cool. 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 several of the days of the month having rain.

What to wear/what to pack:

  • Socks
  • Jacket or coat
  • Waterproof luggage
  • Fleeces
  • Warm pants or jeans
  • Umbrella
  • Standard footwear
  • Light gloves or mittens
  • Waterproof footwear
  • Rain coat

March

In March, Seto Inland Sea is relatively cool. 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:

  • Waterproof footwear
  • Light jacket or fleece
  • Pants or jeans
  • Waterproof luggage
  • Dresses
  • Socks
  • Umbrella
  • Long sleeve shirts or blouses
  • Standard footwear
  • Rain coat
  • Long skirts

April

April for Seto Inland Sea is balmy. Temperatures average in the 60s F (high 10s C) during the day.

What to wear/what to pack:

  • Rain coat
  • Standard footwear
  • Long skirts
  • Umbrella
  • Light jacket or fleece
  • Waterproof footwear
  • Dresses
  • Socks
  • Long sleeve shirts or blouses
  • Waterproof luggage
  • Pants or jeans

May

May in Seto Inland Sea is warm. Temperatures average in the low 70s F (low 20s C) during the day.

What to wear/what to pack:

  • Light footwear
  • Rain coat
  • Long and short sleeve shirts
  • Sunscreen lotion
  • Dresses
  • Umbrella
  • If you're going to the beach, bathing suits, swimwear
  • Waterproof footwear
  • Shorts or short pants
  • Waterproof luggage
  • Sandals
  • Skirts

June

Traveling to Seto Inland Sea in June, you will notice that it is pretty consistently hot. Daytime temperatures are in the low 80s F (high 20s C).

What to wear/what to pack:

  • Light footwear
  • Rain coat
  • Shorts or short pants
  • Dresses
  • If you're going to the beach, bathing suits, swimwear
  • Sandals
  • Waterproof luggage
  • Skirts
  • Sunscreen lotion
  • Long and short sleeve shirts
  • Umbrella
  • Waterproof footwear

July

If you vacation in Seto Inland Sea during July, you are likely to find that it can be very 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:

  • Sunscreen lotion
  • Sandals
  • Short sleeve shirts
  • Sunglasses
  • Waterproof luggage
  • If you're going to the beach, bathing suits, swimwear
  • Rain coat
  • Dresses
  • Shorts
  • Umbrella
  • Skirts
  • Waterproof footwear

August

August 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:

  • Waterproof footwear
  • Short sleeve shirts
  • Sandals
  • Skirts
  • Rain coat
  • Shorts
  • Sunglasses
  • Dresses
  • Waterproof luggage
  • If you're going to the beach, bathing suits, swimwear
  • Sunscreen lotion
  • Umbrella

September

If you vacation in Seto Inland Sea during September, you are likely to find that it is extremely warm.

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:

  • Sunscreen lotion
  • Waterproof footwear
  • Umbrella
  • Shorts
  • Short sleeve shirts
  • Skirts
  • Sunglasses
  • Dresses
  • Waterproof luggage
  • Rain coat
  • Sandals
  • If you're going to the beach, bathing suits, swimwear

October

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

What to wear/what to pack:

  • Long and short sleeve shirts
  • Waterproof footwear
  • If you're going to the beach, bathing suits, swimwear
  • Shorts or short pants
  • Umbrella
  • Skirts
  • Light footwear
  • Waterproof luggage
  • Sandals
  • Sunscreen lotion
  • Rain coat
  • Dresses

November

November is crisp. Temperatures average in the 60s F (high 10s C) during the day.

What to wear/what to pack:

  • Pants or jeans
  • Rain coat
  • Long skirts
  • Dresses
  • Standard footwear
  • Light jacket or fleece
  • Socks
  • Long sleeve shirts or blouses
  • Waterproof footwear
  • Waterproof luggage
  • Umbrella

December

If you visit Seto Inland Sea during December, you are likely to find that it is cool.

Temperatures tend to hover around the 50s F (low 10s C) during the day, while at night they can dip into the high 30s F (single digits C).

What to wear/what to pack:

  • Light gloves or mittens
  • Waterproof luggage
  • Fleeces
  • Socks
  • Warm pants or jeans
  • Rain coat
  • Umbrella
  • Jacket or coat
  • Standard footwear
  • Waterproof footwear

Year-round what to wear/what to pack 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.

  • A plug adadpter that supports outlet types A and B
  • A SIM card that works in Seto Inland Sea

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