But the forecaster has warned that thunderstorms could be looming.
Castlederg in Co Tyrone recorded the highest temperatures on Friday, with the mercury climbing to 20.7C, as sunseekers across NI made the most of the warm spell.
Patches of fog and mist may develop overnight, with temperatures dipping to 8C, although clear skies are expected to continue into the morning.
A spokesperson for the Met Office said: “Quite widely we’ve had temperatures into the high teens today with the sunshine, with light winds as well.
“So, it’s been quite a pleasant day. Tonight will be dry with clear spells, perhaps a few mist and fog patches.”
Temperatures are expected to reach a maximum of 20C on Saturday.
Those attending the races at the north coast will see temperatures reaching 13C for the 9am start to the competitions final day of racing.
The Met Office predicts clear skies throughout the day with a small chance of cloud coverage.
“By nine o’clock, temperatures will be up to around 13-14C already,” the forecaster said. “So they’ll bounce up quite quickly at the start of the race.
“Tomorrow is a very similar day in terms of the weather, very similar to what we’ve had today.
“Any mist and fog (overnight) will also quickly clear, so that should be gone by nine o’clock too.”
However, the Met Office anticipates a “trickier” Sunday with chances of heavy showers and thunderstorms.
While in the morning we can expect similar sunny spells as seen throughout the week, cloud coverage will increase as the day progresses.
Heavy showers are expected as a result with a small chance of thunderstorms throughout the region.
Despite this, temperatures will remain in the mid to high teens maxing out at 19C.
The Met Office spokesperson said: “Sunday’s going to be a little bit trickier. Sunday morning, again, quite similar sort of temperatures in the low to mid teens perhaps, with lovely bright sunny skies at first.”
Sun seekers at Botanic Park
News Catch Up – Friday 9th May
“It looks like we could see generally cloudier skies by the afternoon, perhaps with some heavy showers as well,” the forecaster added.
“So within those heavy showers, there’s a small chance we could have some thunderstorms too.”
The Met office added that there was also the potential for some gusts and hail, which would not could create challenging conditions on NI’s roads.