The last frost in Portrush (Coleraine), Northern Ireland was the night of the Tuesday 02/03/2021 to Wednesday 03/03/2021, with a minimum air temperature of 1.0°C (33.8°F), and therefore a probable minimum ground temperature of around -2.0°C (28.4°F).
There are no frosts forecast for Portrush (Coleraine) in the next 5-days.