Anyone heading to Slane for tomorrow’s Harry Styles gig should have their feather boas and brollies at the ready, Met Éireann has warned.

Around 80,000 people are making their way to the iconic venue for tomorrow’s concert – and forecaster Aoife Keely says they can expect a mix of sunshine and showers.

“I definitely wouldn’t be heading out without the rain poncho,” she told Newstalk Breakfast.

“A lot of the day is actually going to end up fairly dry but there will be some showers drifting up through the afternoon and evening so it is not going to be continuous rain by any means, just a bit here and there.

“But definitely have the ponchos at the ready.

“There could even be some heavier showers there later so even though you might get away with it at the concert, but you might get caught walking back up to the bus – so, definitely a day to be on your guard.”

Crowds gather for Harry Styles in Amsterdam. Image: ANP / Alamy

She said Ireland is “definitely seeing a transition to more showery conditions” this weekend.

“It is still going to stay warm though and it is going to feel very close as well – it is getting vey humid now over the next couple of days,” she said.

“Temperatures will be up around the 20s for a lot of the country so it is still going to feel summery but just not pleasant if you do get caught in a shower.”

Gardaí and organisers at Slane Castle, 07-06-2023. Image: Sasko Lazarov/Photocall Ireland

Also on the show, Goss.ie founder Ali Ryan said the audience will be around 95% female, with an average age between 16 and 28.

“He is very young to be playing Slane,” she said. “I think he is the youngest artist since Robbie Williams in 1999.”

“There is something nice about seeing such young people going to Slane. It will be their first, probably, big music experience for many of them.”

She noted that event organisers this week said they expect the crowd to be, ‘lovely compliant and sober’.

“They don’t really focus too much on the bars for a gig like this which is very unlikely previous Slane gigs,” she said.

“I think the last headliner was Metallica ... so I think it is going to be a very different sort of gig.

“You never hear about rowdy crowds or fights or anything like that when there is a Harry Styles gig so he does bring really good people together so it is a very positive weekend.”

Gates at the venue open at 2pm tomorrow, with the first support act due on stage at 2.30pm.