Congratulations to Karen Ennis on completing the Tsugaru Strait!

Karen has proudly become the FIRST BRITISH WOMAN to achieve the Oceans Seven!!!

Swim date: 19th June 2026

Age: 54

Nationality: UK

Country of Residence: UK

Swim Start Time: 04:07

Swim Finish Time: 17:22

Completion Time: 13 hours 14 minutes 41 seconds

Swim Distance: approximately 45km

Swimming Style: Free style

Water Temperature: 16.0℃ – 21.0℃ *Sea Surface Temperature

Air Temperature: 17.8℃ – 26.0℃

Relative Humidity: 34％ – 92％

Wave Height: 0.45m – 1.3m

Wind Speed: 0.5m – 4.0m

Stroke Rate Per 60 seconds: 55 – 63

Observer’s comment

At the briefing, I was struck by how united Karen’s team seemed, with everyone wearing their team uniforms. It gave me a strong sense of their team spirit and the close bond they shared.

Although Karen appeared slightly apprehensive at the time of departure, I was impressed by how seriously she and her team prepared for the swim. The sea conditions were relatively calm throughout the crossing, and Karen maintained a steady pace from start to finish, swimming calmly and consistently.

When she successfully completed the crossing, she was visibly shaking from exhaustion, but it was clear how much the achievement meant to her after swimming all the way to the finish.

I was truly relieved and delighted to witness Karen finish safely and see her successfully complete this incredible challenge.

Karen, congratulations on successfully completing the Tsugaru Strait crossing and becoming the FIRST BRITISH WOMAN to complete the Oceans Seven!

Observer: Takahiro Sawada