Sikorski also said Ukraine must not be excluded from talks about its future or pressured into accepting a settlement while its civilians remain under Russian attack.
Speaking after a ministerial meeting of the Council of the Baltic Sea States, Sikorski joined his Ukrainian counterpart and EU foreign policy chief Kaja Kallas in a joint statement to the media.
He said the meeting had reaffirmed the unity of countries in the region in opposing Russia’s ongoing invasion.
"We agreed that strengthening military and financial support for Ukraine remains essential," Sikorski said. "The priority is to support Ukraine in preparing for the coming winter and to increase the resilience of its energy sector."
He said Poland would allocate an additional PLN 8 million (EUR 1.8 million, USD 2 million) to the Energy Community, an organisation bringing together the EU and nine neighbouring candidate or potential candidate countries, which will use the funds to purchase generators for Ukraine.
Sikorski said Russia must understand that continuing its war against Ukraine would bring increasing costs and consequences.
Poland was ready to make a constructive contribution to future efforts to secure peace and security in the region and to take part in the negotiations, he added.
He also confirmed that Poland would host military exercises by the Coalition of the Willing of Ukraine's allies later this month.
"Ukraine should not be forced to negotiate its future under the pressure of attacks on its civilian population," Sikorski said.
"No settlement can be imposed on Ukraine without its consent and without its presence at the table," he added. "Likewise, Europe’s security cannot be the subject of talks held without our participation."
Sikorski said countries on NATO’s eastern flank would be particularly affected by the terms of any potential agreement and could offer an important perspective on the threats posed by Russia.
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Source: IAR, PAP, polskieradio24.pl