I'm thinking about a trip into Craig a Ffynnon Saturday,  the weather put me off going last week and not being familiar with the cave I'm wondering if the amount of rain we still getting is enougth to make the entrance impassible.    Your advice is welcomed.

Craig a Ffynnon has a very rapid run through. Today's rain will have gone. It's what happens Friday night and Saturday/Sunday that you need to consider. If the forecast is dry you should be OK.