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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the DailyCity weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
If you’re heading to Kefalonia this week, pack for warm, settled conditions — the live forecast above shows plenty of sunshine, with only a slim chance of a light shower midweek. The island’s Ionian position shields it from most Atlantic fronts.
What’s the outlook for the next week or two?
Kefalonia enjoys a classic Mediterranean climate. Over the coming days, expect highs around 28–30 °C in Argostoli and along the coast, with sea breezes keeping the air fresh. The weather in Kefalonia 10 days ahead stays mostly dry, though a brief thundery burst can’t be ruled out late in the second week. For those planning further ahead, the weather in Kefalonia next 21 days shows a gradual cooling trend as autumn approaches, but daytime temperatures should still reach the mid-20s.
Are there any local variations to watch out for?
Yes — the mountainous spine of the island, especially around Mount Ainos, can trap cloud and produce isolated downpours even when the coast is clear. If you’re staying in Lixouri or Skala, the BBC Weather Kefalonia 7 days forecast will likely show slightly cooler nights inland. For visitors checking BBC Weather Kefalonia 14 days, the main change to note is a dip in humidity as September progresses.
Should I expect any strong winds on Kefalonia?
Yes – the Meltemi breeze can pick up in August, especially along exposed western coasts like Lourdas. Gusts rarely exceed 25 mph, but it makes for great windsurfing conditions near the harbour.
Is the water safe for swimming all year?
Sea temperatures stay above 20 °C until late October, so swimming is comfortable through autumn. Only in deep winter (January–February) does the water drop to around 15 °C, which most find too cold for a dip.
How reliable are long-range forecasts for the island?
Seven-day forecasts for Kefalonia are fairly reliable due to its stable summer pattern. Beyond 10 days, accuracy drops because small Atlantic depressions can shift unpredictably. The live forecast above gives your best guide for the coming week.
For more UK holiday planning, see our UK weather hub and compare conditions with other popular destinations like Crete Weather. If you’re looking ahead, also check 10 Day Weather Forecast UK for travel connections.