How to interpret surf swell charts?

[Mahigeer]

I would appreciate if any guidance given on how to interpret the chart below:
http://www.spitcast.com/surf-report/spot/san-clemente-pier-san-clemente-ca/?dcat=day&dval=20130420

If you move the pointer to the swell chart at the noon, a black window appears.

On the top is states “4ft, 12PM”, but below the line it reads “1ft@14s from SW...1ft@13s from S....etc.

So, which one should be considered? 1ft@14s is a dry launch. Right?
Yet 4ft is not an easy launch.

Also if there is an eight MPH wind, shouldn’t that provide more surf action.

Thanks for your help.