Arriving at Shannon about noon. In July. Is there enough time to drive Galway city to catch the bus to the ferry?
looks like sailing times are 10:30, 12:00, 1:00, 6:30....not sure why you'd drive to Galway to catch the bus, there is a car park at the ferry location.....
Is that Rosavel?
yes Rossaveal is the ferry location....
Ros A Mhíl is west of Galway city, so at least 50 minutes extra to your drive on what is quite a busy two lane road.