The UK may continue to strengthen its role through military alliance NATO, said the president during his visit in Puumala.
According to him, the country has not thus far been particularly interested in European security and foreign policy.
Niinistö estimates that the effects of the Brexit on the stock exchange and currency are overstated, and he hopes that the market will soon return to normal.
During Russian President Vladimir Putin’s upcoming visit to Finland, Niinistö plans to discuss the Brexit, relations between Turkey and Russia, as well as the situation in the Ukraine.
Putin arrives in Finland on Friday.