Our climate is perfect for growing Olive trees as they are hardy to around -15C and can be grown in Ireland without a fleece to this temperature. In fact they need at least three months of the year at a cold temperature to flower and in turn fruit.
Olive trees generally need as much sunlight as possible. In other words, the more light they have, the longer your olive tree will remain healthy and in its best condition. Although, a little shade can be tolerated with a few precautions.
Olive trees are tougher than you think but try and choose a sunny, sheltered, well-drained position and plant in spring, after the risk of frost has passed, but before the end of June to give the tree plenty of time to establish before the following winter.