First round results saw impressive wins for Cardiff, Cross Keys and Aberavon whilst Newport triumphed over newly promoted champions Pontypool. After just two weekends of rugby in the Premier Division only five of the sixteen clubs remained unbeaten. Neath had impressed early on with two wins away from home whilst Cross Keys had made an early impression. Three weeks into the tournament only Aberavon maintained a one hundred percent winning record thanks to their young-blooded team.

A month into the competition saw the gap between the top and bottom of the Welsh Premiership increase as table-toppers Newport and Swansea extended their winning form. At this early stage in the tournament Llandovery had failed to record a first win of the season but the end of October brought the club a taste of success as they defeated Swansea. Newport maintained their grip on the top of the table with an impressive 64-5 success over Bedwas, taking their unbeaten run of games into double figures. Early November saw Newport gain a victory at Cardiff Arms Park for the first time since 1995 whilst Llandovery continued their newly acquired winning form to stay clear of the bottom spot after defeating Newbridge.

Newport encountered their biggest match of the season as they travelled to the Gnoll in early November, aiming to add another victory to only the two they had mustered in twelve previous league encounters. Yet a rampaging Neath made light work of the visitors in the 37-8 showpiece with Richard Johnston bagging a brace of tries and teenage fly half Matthew Jones adding nineteen points with the boot. Aberavon and Camarthen Quins also attained successful victories to keep the Black and Ambers honest as the season started to become a four-horse race for the title. Pontypool incurred a defeat at the hands of Llandovery, who had picked up from their bad form at the start of the season to climb out of the relegation zone with this 50-3 triumph; their highest score in the Premiership thus far. Cardiff also enacted a rout over Caerphilly as they powered to a six-try, 45-3 success.

The end of November saw important wins for Neath, over Cardiff, to remain close to league leaders Newport, and the Carmarthen Quins, who triumphed over an unpredictable Swansea to continue their excellent form. Caerphilly gained a 29 point advantage in a thriller of a game over Newport but the Premiership table toppers scored 31 unanswered points in the second half to clinch the win whilst Llanelli secured a draw with Llandovery in an attempt to turn their less than successful season around.

The run up to Christmas saw Llanelli climb off the bottom of the table with an emphatic 52-5 victory over Cardiff. Newport defeated new bottom-side Ebbw Vale in a narrow 19-15 victory despite two scores from Ebbw’s back rower Manu Tuipulotu. Second and third placed teams Neath and Quins met in a match which saw Neath increase their stature as Newport’s nearest rivals whilst Pontypool staged a superb comeback against Pontypridd as they salvaged a 20-20 draw after trailing by fourteen points. Towards the end of the month Neath sat at the top of the table courtesy of a win over Aberavon, and the fact that Newport had had a fixture postponed. Llanelli continued their renewed form with a win over Swansea and subsequently gained a place in the table over Cardiff, whose poor run continued.

January 2004 brought a change to the rear end of the table as Ebbw Vale’s superb 22-20 victory over Bridgend consigned Cardiff to the final spot. Neath reigned at the top of table, due to Newport’s two games in hand, whilst Aberavon got their season back on track with a hard-fought 22-15 victory at Cross Keys; a brace of tries from David Hawkins helped the Wizards overturn a 7-8 deficit at Pandy Park. Newport and Neath were tied on points later in the month after both sides had gained their seventeenth wins of the season; Newport pipped Neath to pole position due to a higher try count. Aberavon had moved beneath the top two into third place thanks to 20-3 win over Newbridge.

Early March saw Newport extend the Prremiership lead in an enthralling match with Llandovery. Each side scored six tries with 22 points from the boot of Dan Griffiths proving the difference in the 47-37 win. Newbridge's hopes of avoiding relegation were hit by an unlucky 24-25 loss at home to Caerphilly; Newbridge out-scored the visitors four tries to three, but four penalties from fly-half Stuart Thomas edged his side ahead at the final whistle. Pontypool defeated Llanelli in a result which pushed them three places up the Premiership table, while at the same time dropping Llanelli to the bottom. Late in the month Newport incurred only their second defeat, 22-21 to Bedwas. The side had only lost one other fixture to rival title chasers Neath, who with their confident 46-19 win over Bridgend on the same weekend as Newport’s loss kept the Gwent side close. At the other end of the table, late March wins for Ebbw Vale and Newbridge, over Aberavon and Llandovery respectively, lifted them out of the relegation zone.

Early April saw Neath take on Bedwas and succeed where Newport had failed with an albeit hard fought 21-10 victory. The table leaders were now just three points clear at the top with four games remaining in the season. Llanelli ground out an impressive 38-9 win at Ebbw Vale in a bid to lift themselves from the bottom of the Premiership table; they had five games in which to succeed in this feat to prevent relegation to Division One.

In the decisive game of the Premiership Newport defeated Neath at Rodney Parade as they inched towards the trophy. The latter stages of the Premier Division also saw Caerphilly record an historic 27-25 win over Cardiff, who remained in the bottom three of the table along with Llanelli and Llandovery. Pontypridd took full advantage of an Aberavon red card, and so numerically challenged side, to extend the gap on their third position in the table. Late April defeats for Pontypool and Ebbw Vale saw them join the relegation black hole.

Newport painted the town black and amber as they secured the 2003–2004 Premiership trophy with two games still to play before the season’s end. Their 43-7 victory over Caerphilly gained the Premiership crown as Neath suffered a home defeat to the struggling Cardiff. Early May saw Pontypool, Cardiff and Llanelli all guarantee themselves Premier Division rugby for the next season after all three gained victories while the same May weekend saw Aberavon become the first Premiership side in history to score 100 points in a match. Twelve Aberavon players scored tries and fly-half Jamie Davies secured 32 points in the 102-5 massacre over Caerphilly, who were resting virtually all of their first team players for the Konica Minolta Cup Final.

The final games of the Premiership season saw Newport round off an excellent season with a win at Aberavon, who finished fourth in the table. Pontypridd defeated Swansea at Sardis Road to cement their third place position in the Premiership.

Ultimately, with twenty-seven out of thirty matches won, Newport were the deserved winners of the Premiership title. They had scored 142 tries throughout the season with Craig Richards contributing thirty to this tally, making him the Premiership’s leading try scorer. In doing so Richards smashed Newport’s club record for most tries scored in a season by any one player, obliterating Andrew Lewis’s previous total of sixteen.

Premiership runners-up Neath eventually finished twelve points behind the champions after such a close run battle during the season. The high point of Neath’s season was a 37-8 win over Newport in November: the worst points defeat the eventual champions suffered in their otherwise successful campaign.

Former Wales lock Paul Arnold was at the helm for Camarthen Quins. His side finished an impressive fifth despite losing their first two and last three games of the season. Swansea, coached by Tony Clement and Keith Colclough, had a frustrating season with sixteen wins out of thirty matches played, though outside half Luke Richards finished Premiership top scorer with 335 points. The previous season’s Premiership champions Bridgend never really threatened for the title this time around as they finished in seventh, whilst eighth-placed Cross Keys were a formidable force at home ground Pandy Park; they finished respectably in the middle of the table. Bedwas, the previous season’s Division Two champions, rounded off a good first season in the Premiership by securing ninth place overall. They chased Cross Keys hard all season, ultimately finishing just a point behind them.

The end of the Premiership season saw a close battle at the bottom end of the table. At the close of play just three points separated the bottom seven clubs. Caerphilly finished the season in tenth place on 34 points as they edged Pontypool into eleventh due to a greater try count. Following poor form earlier in the season, Pontypool lifted themselves from the nether regions of the table with a narrow 25-24 victory over Neath in their final fixture. Cardiff only narrowly avoided bottom place: a determined effort away at the Gnoll in their final outing saw a 37-27 win for the Arms Park side. The side would seek to improve on their frustrating performance in the next season’s Premiership competition.

Newbridge managed a double over Cardiff in the course of their campaign, but that was the high point of their season. Elsewhere, Llanelli’s young side seemed impressive yet lacked results, until they won five of their final six matches. At the very foot of the table Llandovery had been pre-season favourites to finish bottom and they appeared on course to do so when they opened their campaign with six straight defeats. However, they managed to recover from this initial bad run and secured a few superb victories; despite fading in the New Year they succeeded in avoiding the Premiership’s bottom spot. Ebbw Vale, with one less draw than Llandovery, finished in sixteenth and last place in the table. They narrowly lost 20-21 at home to Swansea on the final day of the season; had they won, they would have climbed four places.

It wasn’t all doom and gloom for the Steelmen, however, as they were not relegated. Next season the Welsh Premiership would be bolstered by the addition of Division One Champions Llanharan.