I'm relatively new to surfing (5 months) and none of my mates surf which is quite annoying as you never get a phone call to say the surfs here like I did when kitesurfing

Anyway, I keep an eye on most of the obvious channels magicseaweed, local surfshop report etc. Some of you guys have been saying you can't wait till friday when the next surf is due. I checked (MSW) a few days ago and friday was looking good, I know its a long range forecast and can change all the time as the weather does. However, there is a point that I'm slowly coming to, friday now looks pretty sh1t 3ft @ 5 secs (North wales). I checked Sennen just to see what all of the hype is about and they've got 5ft @ 8secs. So, if the swell is travelling towards N Wales how can the waves get closer together time wise?