Hi there,
Your Ireland trip sounds wonderful!
For the Northern Lights at Malin Head, keep in mind that sightings rely on clear skies, low light pollution, and high solar activity, so a three-day stay is a smart plan to increase your chances, though sightings can be unpredictable. Using an app or website like Aurora Watch UK or the NOAA Space Weather Prediction Center can help you monitor solar forecasts closer to your travel dates, and might assist in making a more informed decision on if you need to spend a full three days in Malin Head.
Ireland’s Dark Sky Reserves might also interest you for stargazing:
Mayo Dark Sky Park and
Kerry International Dark Sky Reserve offer stunning night skies even without the aurora. While up north, consider visiting the Giant’s Causeway,
Derry/Londonderry, and
Carrick-a-Rede Rope Bridge for unique experiences. For
Dublin, two days should cover major highlights like Trinity College, St. Patrick’s Cathedral, and the Guinness Storehouse.
Let me know if you have any other questions, and I would be happy to help.
Cathaoir