Harbour attacked from all parts of the paddock in the last 20 minutes and almost caught Dunedin, who ran out victors 32-27.
Southern adapted better to the wet and muddy conditions and played bull rush-style rugby to comfortably beat Harbour at Watson Park.
Harbour retained the Scoles Memorial Trophy with a win over Zingari-Richmond at Forsyth Barr Stadium.
It was blitzkrieg rugby from the start when Harbour scored nine tries to beat Kaikorai at Watson Park.
A five-try bag to Harbour's George Folau put the dampers on his opposite's 50th premier division one game for Green Island.
Harbour ran rampant in the second spell to overwhelm Pirates in muddy conditions at Watson Park.
University A had to work hard to gain a one-point win over a tenacious Harbour team at the University Oval.
Powerful centre Wayne Gibson used his strength to score a hat trick of tries when Harbour beat Alhambra-Union at Watson Park.
It was men against boys as the powerhouse Dunedin pack dominated from the start and laid the platform for the win over Harbour at Watson Park.
Southern fullback Joe Hill used his express speed to break the hearts of Harbour supporters and help the Magpies retain the Speight's Challenge Shield at Bathgate Park.
Zingari-Richmond players and supporters punched the air in celebration after replacement Shaun Driver kicked a late penalty to clinch a dramatic win over Harbour at Watson Park.
The tight five helped kick-start the season for Pirates with a bonus-point 29-20 victory over Harbour at Hancock Park.
It was Stephen Fenemore's day.
Harbour played more effective wet weather rugby in the second spell to beat Alhambra-Union at the North Ground.
The Harbour forward pack set the foundation for a victory over Green Island at Miller Park.
Harbour retained the Scoles Memorial trophy when it beat Zingari-Richmond in a messy game at Watson Park.
Southern demonstrated its depth when it scored three tries in the first 15 minutes to stamp its authority on the game at Watson Park.
Replacement flanker Eben Joubert scored a controversial late try to give Harbour an upset 31-29 win over Dunedin at Kettle Park.
An outstanding defensive game combined with a contribution of 25 points from Olly Cuthill, snapped Harbour's losing streak against Kaikorai, when it ran out 30-21 victor at Bishopscourt.
The inclusion of Paul Miller and Daniel Johnson early in the second half gave Pirates the resurgence they needed to overcome a determined Harbour side at Watson Park.