Could later timing have helped Argentina in 1982?

Would Argentina have been better off invading the Falklands later, closer to summer?

Possibly, but the South Georgia crisis and Argentina’s escalating attempt to force a British retreat drove events before that better weather window.

An invasion nearer the southern summer could have made the campaign harder for British ships. Argentina was already reacting to British moves around South Georgia, however, and escalated in the hope of forcing Britain to back down. Unfolding events constrained the strategic timing.