The rain was forecast to ease on Saturday, with showers throughout the day becoming "far and few between".
Sunday was expected to be sunny.
Miss Flynn said today's temperature would reach 18C, tomorrow would be 15C and Sunday 16C.
"At the moment, we've got a northerly flow coming in which brings in the rain. It makes it a little warmer, once that goes, it becomes a little cooler.
"[Today] the wind will be northwesterly, strong and gusty. When the rain starts to clear, it will be west to southwest."
Weekend weather
Friday: 18C, rain
Saturday: 15C, showers clearing
Sunday: 16C, fine