Here is my attempt to reduce things to a basic description; I can't figure out how to lay out a table in here (it was looking great till I previewed it) so I hope that the information will make some sense!
The info is laid out as follows: first is the Sea State number followed by the description for that state, then an approximate wind strength for that sea state and the final figure in brackets is the average wave height. I did not attach a wave height for states 0,1 and 3
0 Calm Glassy, force 0
1 Calm Rippled, force 1 and 2
2 Smooth wavelets, force 3 ( 2 feet )
3 Slight, force 3 to 4
4 Moderate force 4 to 5 ( 5 feet )
5 Rough force 6 ( 9 feet )
6 Very Rough, force 7 ( 14 feet )
7 High, force 8 ( 23 feet )
8 Very High, force 9 ( 31 feet )
9 Phenomenal, force 10-11-12 ( 54 feet )
The sea states do not exactly co-incide with the wind strengths (that would be too easy) and the wave heights are the suggested average for the Nominal Sea State, obviously with a fairly significant difference in windspeed covering a given sea state, the wave height will be far less at the bottom end of the range than the top.
What I have put here is trimmed to the minimum (always risky!) but perhaps gives some idea of what is involved, I found an excellent table with the relevant data laid out very clearly at http://www.seathree.demon.co.uk/seastate/index.htm