Greece’s National Meteorological Service (EMY) issued a Red Alert warning of heavy rainfalls, storms and hailstorms locally forecast on Thursday and Friday, October 2-3, 2025.
This significant deterioration in the weather will be caused by cold air masses in the upper atmosphere of central Europe that will come to the country from the West, via the Adriatic Sea.
At the same time, the meteo service of the National Observatory of Athens warns of significant temperature drop especially in northern Greece and a domino of anomalies in the atmosphere that is expected to lead to severe weather phenomena in the first week of October. Snow fall in north-western Greece.
Development of the bad weather front Wednesday – Friday
⚠️Η ΕΞΕΛΙΞΗ ΤΗΣ ΕΠΕΡΧΟΜΕΝΗΣ ΚΑΚΟΚΑΙΡΙΑΣ
✅Από το απόγευμα της Τετάρτης οργανώνεται το βαρομετρικό χαμηλό στη Νότια Ιταλία που βαθμιαία θα κινηθεί προς το Ιόνιο. Απο το πρωί της Πέμπτης θα επηρεάσει τα νησιά του Ιονίου και τα δυτικά ηπειρωτικά, κινούμενο ανατολικότερα. Τα έντονα… pic.twitter.com/wUw1DhDoJo— Theodoros Kolydas (@KolydasT) September 30, 2025
It is noted that most areas of Greece will be affected by the strong weather phenomena.
EMY’s Red Alert & affected regions
A. On Thursday, October 2
a. From the beginning of the day until the afternoon in the Ionian islands
b. From dawn and until the afternoon in Epirus, western Macedonia, western Central Greece and western and southern Peloponnese
c. From the pre-noon hours in central Macedonia
d. From noon and at intervals until the evening in Thessaly, central and eastern Central Greece (including Attica), the rest of the Peloponnese, western Crete, Evia and the Sporades islands
e. From the evening hours in the islands of the Eastern Aegean Sea and eastern Macedonia
f. From late at night in Thrace.
B. On Friday, October 3
a. From the beginning of the day until the afternoon in the Dodecanese
b. Until noon in eastern Macedonia, Thrace and the islands of the Eastern Aegean
c. Until the morning hours in central Macedonia.
The phenomena will be particularly intense and will present a greater risk:
a. In the Ionian Islands (mainly in the areas of Zakynthos, Kefalonia) and the western and southern Peloponnese on Thursday until early afternoon
b. In central Macedonia from Thursday afternoon until the morning hours of Friday
c. In eastern Macedonia, Thrace and the islands of the Eastern Aegean on Friday until noon
d. In the Dodecanese on Friday from early morning until the afternoon.
Indicative Maps
It should be recalled that the weather in Greece has been mild and kind, so far… but Hey! It’s just October 1!
 issued a Red Alert warning of heavy rainfalls, storms and hailstorms locally forecast on Thu){kind=link}