The Hawks will host the League One side on Saturday 20th July with a 3pm kick off.
Southend United will be preparing for another season in the third tier of English football after securing their place in the division with a dramatic win on the final day of the season.
It will be a tough test as the Hawks gear up for their first season back at Step 4.
Further details will be announced in due course, with the rest of the Hawks' pre-season schedule also to be announced in the coming days.
As always, pre-season matches are subject to change. Stay up to date with the latest announcements by following us on Twitter and Facebook.
Updated 12:08 - 6 Jun 2019 by Shan Toms