Is weed legal in Ireland?

I'm curious to know about the legality of weed in Ireland. Could you provide me with a clear and concise answer to the question, "Is weed legal in Ireland?" I'm particularly interested in understanding the current state of the law and any potential changes that may be in the works. It would also be helpful to know if there are any penalties or consequences for possessing or using weed in Ireland. Thank you in advance for your assistance.