Marine Day 2025

July 21, 2025 in Japan

Crashing waves in the ocean.

Marine Day, also known as Umi no Hi, a Japanese holiday celebrated on July 21, 2025. The day is also known as Sea Day or Ocean Day. It is celebrated annually on the third Monday in July.

We have placed a detailed description of this event on this page: Marine Day 2024. For further information please stop by there!

Where is Marine Day?
Nationwide
Japan
When is Marine Day?
Monday, the 21st of July 2025
Only 463 days left!

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Marine Day 2025 - Japan - Jul 21, 2025 – Copyright © 2024 Cute Calendar