S2 does not make a 37', 36' is the largest model i.e. 11.0 meter.
Like any production sailboat, if you're planning to sail offshore, you will need to make modifications; increase cockpit drainage, replace standing rigging, reinforce or inspect chainplates, offshore sails, etc...
Also bluewater sailing is not just about the sailboat but about how experience the sailor is. You can go offshore in a heavy solid sea-worthy sailboat but without solid experience and knowledge, you will most likely struggle upon your first real offshore heavy weather situation or if something breaks and you're unable to jerry-rig a repair.
There was a sailing article about a husband and wife sailing in the Atlantic on a newer 48' plus solid sailboat and the engine broke down; they ended up calling for a rescue.
My previous sailboat was a Pearson 35 which everyone would admit that it is not a bluewater sailboat but the previous owner was 90 yrs old and sailed her to the Bahamas, Bermuda and up and down the NE coast. There was no modifications to the sailboat, he was able to do this because he was a very experience sailor.
Good luck... btw I love our S2 11.0, very solid, well made sailboat.