Of course, we keep a good look out to avoid hitting things. Being from New England, sailing through thick clusters of lobster pots is a learned experience. My point here is that hitting a rock at full speed, (as I did once in Marblehead cutting a corner to quickly), would buckle the structure of most bay boats. (It took a small chip out of the cast iron keel). The bottom line is, if you have a seaworthy boat, you can go out most anytime with the proper sail configuration; if you don't, then you should wait for a better day. We tend to enjoy going out in "weather". Your Islander 30 is probably particularly well suited.