Slips is ok but as Rus said you do have to dog out
Beware launching in the little pocket on the eastern side of the slipway - if you get too downwind the rock outcrop will claim (large) fins and there is often rubbish from the local louts -scored myself a deep 4cm long cut there a month or so ago that had me off the water for 3 weeks

A note on Swansea - the NE can often take a little while to fill in at the launch site - so if going out earlier in the day volume is your friend - when I first got back into windsurfing I had some walks of shame as I was on an old school 85l board and an extra 10kg on my frame - didnt make for a nice time -
The breeze tends to hang on a little better down their later in the day - dont know why