Champagne will also be replaced by Denbies Sparkling Whitedowns Brut and Whitedowns Rose Brut - both made in the UK.
"This move helps us to broaden our horizons so that we create an improved offer for the 2 million customers who visit our pubs each week", Martin said.
Martin - a vocal eurosceptic - said the pub chain is reviewing all of its products in a company-wise reshuffle which could take up to two years, something he hopes will make the business "more competitive".
"Tariffs are imposed on wine from Australia, New Zealand and the United States, and on more than 12,000 other products". Other existing contracts with European Union suppliers will be honoured until they expire.
'However, we are starting to make the transition to non-EU trade now'. Most of our media is owned by a handful of offshore billionaires with personal agendas.
Wetherspoon will continue to serve Kopparberg cider from Sweden, as the company has said it will transfer production to the United Kingdom post-Brexit.
As well as including more United Kingdom beers in traditional styles and categories, Tim Martin's pub group with also replace German brand Erdinger's alcohol-free beer with a no ABV version made by Suffolk-based brewer Adnams.
The pubs will also serve wheat beers from the UK - Blue Moon Belgian White, Thornbridge Versa Weisse Beer and SA Brains Atlantic White.
Wetherspoon's will continue to serve Kopparberg cider from Sweden.
Wetherspoon will sell more drinks from the United Kingdom and non-EU brewers in the run up to Brexit.
Alcohol-free Adnams Ghost Ship will replace Erdinger alcohol-free beer from Germany.
Wetherspoon has four pubs in suburban Dublin and one in Cork.
"In the event of Brexit when things are changing, it's a very good opportunity to look around the world and see what we can get that enhance customers' enjoyment of our pubs". A "no-deal" alternative would leave the United Kingdom much better off than it is today'.
Major British employers groups have urged the government to remain in a customs union with the EU after Brexit, warning of the risk of tariffs and border delays in their trade with the bloc if they are outside the common external tariff area.
He added the government should also cancel the £39billion Brexit bill, which he dubbed a "leaving gift", and invest the money on local projects.