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When is the best season to visit Mikurajima?
Ship arrival rate & Seasonality

2025就航率.jpeg

・過去の就航率は上記表の通りですが、同じ月でも年によってまるで変わったりするのがお分かりいただけると思います。

(例:8月の平均就航率は76%ですが、100%の年もあれば60%の年もあります)​あくまで目安としてご覧ください。

​TOUR RECORD

past tour operations and water temperatures.

Please use this for reference.

 

seasonality
When is the best season?

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When is the best season to visit Mikurajima?

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First of all, Mikurashima dolphins are on Mikurashima all year round.

So, no matter when you go, the number of dolphins itself does not change. (Approximately 150 in 2021)

During summer, weekends, and consecutive holidays, the number of people increases, and dolphins tend to avoid people as they get tired of them.
Dolphin swim is also waiting for the number of ships.

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If you want to play with dolphins a lot, the best season is when there are few people It will be!

To put it bluntly Weekdays except July and August is!

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Mikurashima has a limited number of lodgings, so no matter what month you go, the number of people stays the same on weekends.

There are more boats from Miyakejima during summer, consecutive holidays, and weekends.

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The weather depends on your luck when you go.Please see the docking rate as a reference.

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Dolphin swim seasonality

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If you want to have a lot of fun with dolphins, the first and last months are April and November!

They will wait for April when humans come to the sea that was closed during the winter for the first time in a while.

The playfulness of the dolphins at this time is about 10 times different than in summer!
​In April, you might be able to see humpback whales coming north from Okinawa!

​The water temperature is low, so be sure to protect yourself from the cold!

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Newborn babies can be seen from May to July

Dolphins give birth throughout the year, but especially during this time.

Please do not approach or chase the baby from here and watch it from a distance.

Except for Golden Week, there are few people, and the number of dolphin boats is few.

From June to July, you can see the flowers of Mikuramiya stag beetle and Saku lily.

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If you are aiming for a time when the water is clear and the sea is calm, late July to September

If the Kuroshio Current comes in, the transparency is high and the water temperature is warm, so you can swim comfortably.

However, at this time of year, there are too many people and the dolphins tend to pass by.

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There are many dolphin boats during consecutive holidays and summer, so dolphin boat traffic can occur.

So there are many boats waiting in line where dolphins are. Your chances of swimming with dolphins may be a little less.

However, it all depends on the dolphin's mood.

If you are a beginner (if you are lucky, the sea will be calm), we recommend this time of year.

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August to October is Typhoon Season

This time of year is a game whether you hit a typhoon or not. (The typhoon starts in April, so I do not know when it will come.)

The timing, number, and course of typhoons vary from year to year, so it all depends on your luck.

If you don't hit it, the water temperature is still warm (the water temperature in November is warmer than during Golden Week and about the same as in June).

Unlike summer, dolphins are often in a good mood, so you can enjoy plenty.

I really like this season, but do not forget to make a reservation for the helicopter on your way back (for Mikurajima stay) as the ship service rate is also going down.

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From November onwards is also the migration season for humpback whales, so if you are lucky, you might even see them!
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In November, many dolphins come to visit us as if they are reluctant to say goodbye.

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Dolphin swimming on Mikurashima is open from Mar. 15 to Nov.15.

However, due to the low berthing rate in March
Our tour starts in April

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Recently, there are many days when the sea is rough, probably due to the acceleration of global warming.

The berthing rate of each month varies considerably from year to year.

Please use it as a reference only.

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Water temperatures fluctuate significantly depending on the proximity of the Kuroshio Current.

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◆ The flow of the Kuroshio Current can change drastically within just a few days.

Please refer to this site to check general conditions and water temperatures.

http://sui-kanagawa.jp/Kaikyozu/KantoTokaiIZ/

The water temperature varies greatly depending on how the Kuroshio Current hits.

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◆The Kuroshio current and general water temperature can be viewed on this site, so please check before departure.

(Kanto-Tokai Sea Conditions Bulletin/Izu Islands Sea Area)

http://sui-kanagawa.jp/Kaikyozu/KantoTokaiIZ/

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◆Since the port of Mikurashima Island faces the west, it will be difficult for Tokai Kisen to dock if the west wind blows or swells enter from the west.

For a rough forecast, this site (Windy) is visually easy to understand.
You can see more detailed information by downloading the Windy app on your smartphone (paid)

https://www.windy.com/

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​TOUR RECORD

past tour operations and water temperatures.

Please use this for reference.

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