But there could be price rises on the horizon at the low-cost food and drink chain.
The hospitality giant, which runs 843 pubs in the UK and Ireland, reported a five per cent increase in sales over the six months to January 29 compared with the same period in 2019, and up 13 per cent compared with the previous year.
It swung back to a profit over the half year after suffering losses following the pandemic when many pubgoers stayed home.
Wetherspoon made a pre-tax profit of £4.6 million, compared with a loss of £21.3 million in the same period last year.
It was still a 90 per cent decline compared with its pre-Covid figure of £50 million in the first half of 2019.
Sales have been improving each quarter since lockdown restrictions were lifted, Mr Martin told the PA agency.
If sales do not continue to grow at a "modest" rate, then it could implement price increases, the company cautioned.
But Mr Martin told PA that Wetherspoon had managed to keep prices low compared with its rivals, making it "the most competitive we've ever been".
The pub group has been heavily exposed to surging costs for energy, food and labour, which have hit the wider pub and restaurant industry particularly hard.
Mr Martin welcomed the possibility of inflation easing, which he said would be a "great benefit".
He said: "Inflationary pressures in the pub industry, as many companies have said, have been ferocious, particularly in respect of energy, food and labour.
"The Bank of England, and other authorities, believe that inflation is on the wane, which will certainly be of great benefit, if correct."
Supply and delivery issues, which were also exacerbated during the pandemic, have "largely disappeared", Mr Martin said.
He added that the problems "were probably a phenomenon of the stresses induced by the worldwide reopening after the pandemic, rather than a consequence of Brexit".
The company said it is "cautiously optimistic" about progress this year having seen a substantial improvement in its sales and profits.
Experts said Wetherspoon could be in a better position than its rivals this year against a downturn in consumer spending, because of its commitment to keeping prices low.
Charlie Huggins, the head of equities at Wealth Club, said: "Overall, while there are reasons for optimism, 2023 is shaping up to be yet another challenging year for Wetherspoons.
"Higher interest rates and inflation are strangling the economy, and leading to significantly higher costs for the group.
"Combine this with Wetherspoons' low margins and low price strategy, it means the group faces an uphill battle in the current environment."