Greece’s National Meteorological Service (EMY) has issued an emergency weather warning for heavy rain and thunderstorms, expected to begin in the early hours of Monday (26 October) and continue until at least Tuesday (27 October).

The severe weather is forecast to affect several parts of the country, particularly eastern Greece, with Athens and the wider Attica region among the areas expected to be hit. The storms could also bring localised hail.

On Monday, heavy rain and thunderstorms are forecast in Attica until midday, with another spell of severe weather expected during the evening. Eastern Central Greece, particularly Fthiotida and Boeotia, will be affected until the morning, while Thessaly, especially Magnesia and Larissa, could experience intense rainfall and thunderstorms until the evening.

Severe conditions are also expected in the Sporades islands and Evia, while the Dodecanese will face heavy rain and thunderstorms from late morning until late at night. The eastern Aegean islands are expected to be affected from midday onwards.

On Tuesday, the severe weather will persist in the Sporades and Evia until midday, across the eastern Aegean islands until late afternoon, and in the Dodecanese from midday.

In Attica, heavy rain and thunderstorms are expected to continue into the early hours of Tuesday morning.

The full emergency weather bulletin issued by EMY

The National Meteorological Service has warned that weather conditions will deteriorate from the early hours of Monday, 26 October 2026, until at least Tuesday, 27 October 2026, bringing heavy rain and thunderstorms to several parts of the country, mainly in eastern Greece.

The storms may also be accompanied by localised hail.

Monday, 26 October 2026

• Eastern Central Greece: Particularly Fthiotida and Boeotia, until the morning.
• Attica: Until midday, with a further outbreak of severe weather during the evening.
• Thessaly: Particularly Magnesia and Larissa, until the evening.
• Sporades and Evia: Heavy rain and thunderstorms are expected.
• Dodecanese: From late morning until late at night.
• Eastern Aegean islands: From midday onwards.

Tuesday, 27 October 2026

• Sporades and Evia: Until midday.
• Eastern Aegean islands: Until late afternoon.
• Dodecanese: From midday onwards.
• Attica: Until the early morning hours.