There have been lots of questions about what is safe and not safe to venture out to HRBT. Take this for what it's worth but this is what I have found.
1) N or NE wind: 5-10 probably ok. 10-15 can get nasty. 15-20 or over, don't even think about it.
2) NW, W, or SW wind: You are probably fishing the E side of the bridge. Up to 10-15 you should be ok. 15-20 will be snotty, especially on the ride over from the ramp. I have launched from 13th St. and fished in these conditions but I wouldn't recommend it, especially for someone new.
3) S or SE: wind: The best situation. If it is 15-20 you can stay in close to shore and be ok but you might have to launch from 13th St.
4) I wouldn't recommend fishing in open water in anything over 20 kt wind, EVER. If you really want to fish, go somewhere sheltered.
5) Remember that the current rips through there at times and if you have the current going against the wind, you get waves stacked up like river rapids.
6) Don't go just because Forrest is going.
Have fun!
Tom