Most boat designers Beneteau, Catalina, Hunter categorize each boat for its sea worthiness:
From the Catalina website:
[FONT=arial, verdana]Design Category[/FONT]
[FONT=arial, verdana]A - "Ocean" Wind Force [/FONT][FONT=arial, verdana]exceeding 8 (over 40 kts.) Significant Wave Height [/FONT][FONT=arial, verdana]exceeding 4 (over 13 ft.)[/FONT]
[FONT=arial, verdana]B - "Offshore"Wind Force [/FONT][FONT=arial, verdana]up to and including 8 (34-40 kts.)Significant Wave Height [/FONT][FONT=arial, verdana]up to and including 4 (13 ft.)[/FONT]
[FONT=arial, verdana]C - "Inshore" Wind Force [/FONT][FONT=arial, verdana]up to and including 6 (22-27 kts.) Significant Wave Height [/FONT][FONT=arial, verdana]up to and including 2 (6.5 ft.)[/FONT]
[FONT=arial, verdana]D - "Sheltered waters" Wind Force [/FONT][FONT=arial, verdana]up to and including 4 (11-16 kts.) Significant Wave Height [/FONT][FONT=arial, verdana]up to and including 0.5 (1.5 ft.)[/FONT]
Your boat may have a design category that may also help with the decision.
Good Luck