Yes, the neighborhood surrounding Seaside Ave. is relatively safe. Many of the residents there do walk to Cove Island Park and other amenities in the community.
I suggest contacting Stamford's police department to inquire about if there is any crime activity and of what type to obtain that information first hand.
Here's a link to the police department's web site in Stamford that has their contact numbers:
Hope this is helpful to you!
Prudential Connecticut Realty