The 2026 Isle of Man TT races has concluded on a damp note, with Dean Harrison declared the winner of the Senior TT after poor weather conditions scuppered any chance of a restart.

Saturday’s rescheduled four-lap event was called off following heavy rain that hit the island and has refused to clear throughout the window in which organisers had hoped to run the blue riband race of the event.

The race was originally moved forward from Saturday to Friday evening in an attempt to get it completed amid a week of weather disruption - but red flags brought out by Erno Kostamo’s crash at the 11th Milestone as the leaders were on the Mountain section during their second lap brought a premature halt to it.

Organisers had originally hoped to run the race in its original Saturday slot alongside the second Sportsbike TT despite the forecast overnight rain, but with showers continuing throughout the day and mist on the mountain refusing to lift, the call was made at 2pm to call off the remaining race action.

There was originally a contingency plan to run races on Sunday, but with the forecast looking no better, many competitors booked to travel home on Saturday night, and with no guarantee of being able to secure the minimum number of 580 marshals needed to police the course, that option was abandoned on Friday evening.

This year’s TT has been one of the most weather-struck in recent years, despite a week of glorious sunshine during practice week. Only four of the scheduled 10 races went ahead, with both superstock races falling victim to weather delays as well as the suspension of the sidecar class due to aerodynamic issues.

Over the course of the event, there were nine days on which racing could potentially have taken place, and rain affected seven of them.

“Throughout the event, the weather simply hasn’t worked in our favour,” said TT clerk of the course Gary Thompson. “We have faced low cloud, rain, standing water and changing conditions across different parts of the Mountain Course, which have significantly limited the windows available to us.

“We fully appreciate that today’s outcome will be disappointing for competitors, teams, sponsors, volunteers and, of course, the thousands of fans who travel to the Isle of Man from around the world to experience the TT.

“However, throughout the event we have remained committed to making the very best use of every available weather window, while carefully managing the operational, logistical and safety considerations involved in delivering racing on the Mountain Course.

“The challenges we have faced this year are part of the nature of an event that takes place on 37.73 miles of public roads. That is what makes the TT unique, but it also means that weather and course conditions will always play a significant role in determining what is possible.”

Organisers confirmed at the official conclusion of racing on Saturday that Harrison would be declared the winner based on the single lap of action that had been completed when the red flags went out, with Peter Hickman and Josh Brookes joining him on the podium.

It means that the pre-race favourite for the 1000cc classes leaves this year’s event with only two of the four wins expected of him. Michael Dunlop was luckier, able to continue his domination of the supersport and supertwin classes to take three.