With high pressure to our N and NE for Wed and Thu we will get a cool onshore flow of air off the ocean. This will keep the cool air trapped in our region for those days. A warm front will try to lift north on Thursday leading to some drizzle or a few showers during the day, and becoming likely overnight. Warmer with some sunshine Fri but a likelihood of showers and a thunderstorm will develop for Fri afternoon/evening.
Saturday looks rather nice over-all: Breezy, cooler, but pleasant.
Sunday could feature a significant rainstorm approaching. Think of last Sunday and you get a good picture of what it could be like. Timing could be different, but wet and cool to chilly is looking likely. Not the nicest Mother's Day to say the least.
That is all for now. Enjoy.