One of the strongest clubs in the country during the 1950s, it won the national knockout Chatham Cup in 1957 and 1958.

11 players (senior men) have represented NZ whilst playing for Seatoun - Grahame Bilby, Rex Boyes, Keith Gibson, Bert Hiddlestone, Mike Jones, Ron Kearns, Rodney Reid, Duncan Ritchie, Dave Strom, Phil Traynor, Ian Upchurch.

Also a number of international players have played for Seatoun at some stage including Paul Rennell, Shane Rufer, Michael Utting, Jeff Strom, Rupert Ryan, Billy Harris, Paul Cameron, Garry Welch.

This was the third consecutive promotion for the team, having risen from Capital 3 in 2010, mostly due to the great play of Hamdi Yusuf and Doug Moalay.

The Seatoun first team gained promotion into Capital 1 after a highly successful 2018 season that saw them 12 points above their nearest competition on the table.