According to their Facebook page Seaport Pier will open this Friday, July 6th, 2018.

From Seaport Pier Facebook Page:

Good Evening from Seaport Pier!! We are happy to announce that we will be opening our doors on Friday, July 6th to the public at 4 PM . We will be operating on a limited basis from food to beverages and everything in between. We appreciate your patience as this project nears completion. We look forward to welcoming you to North Wildwoods newest attraction!!
Can’t wait to see you all at the Pier!!