Spring brings temperatures of 59°F to 65°F with occasional rain.

Like its Ionian neighbors, Kefalonia sizzles from June to August, with temperatures regularly climbing to 86°F and above. If you're coming early or late in the season, it's still fairly warm, with temperatures hovering between 65°F and 72°F in May and October. The sea stays warm right through to November.

The Ionians have mild but very wet winters, accounting for green forests and lush, fertile plains. Winter temperatures may drop to lows of 48°F but usually hover around the 55°F with abundant rainfall, typical of the Ionian islands.