October starts with autumn-like weather today, October 1st, with local showers and thunderstorms in central and northern Greece, according to the HNMS (Hellenic National Meteorological Service). However, on Thursday and Friday, as meteorologists Giorgos Tsatrafilias, Giannis Kallianos, Klearchos Marousakis, and Theodoros Kolydas posted on social media, the country will face storms, some locally dangerous, with the first snow also making an appearance.

⚠️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

New storm front Thursday & Friday

According to Theodoros Kolydas, a new storm front is expected Thursday and Friday, with rain and thunderstorms across much of the country.
“From Wednesday afternoon, a low-pressure system will form over southern Italy, gradually moving toward the Ionian Sea. From Thursday morning, it will affect the Ionian Islands and western mainland Greece, moving eastward. Severe weather will mostly occur after midday. Beyond western Greece, attention is also needed in the north on Thursday, as well as in the eastern Aegean and the Dodecanese on Friday,” Kolydas said.

Meteorologist Giorgos Tsatrafilias warned that the 48-hour, nationwide, “Π-type” storm will bring severe thunderstorms, gale-force winds, a sharp temperature drop, and even snow at Mount Kaimaktsalan.
“October will kick off with strong storms, powerful winds, falling temperatures, and even snow. The deterioration will start on Thursday morning (October 2) from the west and spread across the country through Friday (October 3). Specifically:

• Heavy rains and thunderstorms, strongest in western and northern Greece and the eastern Aegean (a weather pattern known as ‘type Π’).
• Gale-force winds: northerlies in the Ionian, southerlies in the southern Aegean.
• Temperatures dropping by up to 8°C in central and northern Greece.
• Light snow possible Friday morning in northern mountains (around 1,500m), with some snow also expected at the Kaimaktsalan ski resort.”

Klearchos Marousakis added that this new wave of bad weather will intensify into Thursday as cooler air masses meet the warm waters of the central Mediterranean, fueling the storm. He warned of a noticeable temperature drop and possible flooding, with the first snows likely in northern mountains.

Giannis Kallianos noted that the storm’s main features will be near-nationwide rainfall, severe thunderstorms, strong winds at sea, lower temperatures in western, central, and northern regions, and snow in the mountains of northwestern Greece, even from 1,200–1,300 meters elevation.

Today’s forecast (October 1)

• Mainland, Ionian, North Aegean: Cloudy with local showers and thunderstorms.
• Crete: Partly cloudy with a chance of brief showers in the afternoon.
• Rest of Aegean: Mostly fair with a few passing clouds.

Temperatures:

• Western Macedonia: 7–19°C
• Rest of Macedonia & Thrace: 11–24°C
• Thessaly: 14–24°C
• Epirus: 10–24°C
• Central Greece: 12–24°C
• Peloponnese: 9–27°C
• Ionian Islands: 14–24°C
• North & East Aegean: 14–24°C
• Cyclades: 16–25°C
• Dodecanese: 21–26°C
• Crete: 12–25°C

Winds:

• Aegean: Northerly, 3–5 Beaufort.
• Ionian: Variable up to 3 Beaufort, turning southerly 2–4 Beaufort in the afternoon.

Athens: Cloudy, chance of light local showers. 18–24°C, winds variable up to 3 Beaufort.
Thessaloniki: Cloudy with light, brief showers. 16–20°C, winds variable up to 3 Beaufort.

Thursday, October 2

• Rain and scattered thunderstorms starting in the Ionian, Epirus, western Macedonia, western Sterea, and western Peloponnese, spreading quickly eastward. By afternoon, storms will reach the Cyclades and western Crete.
• Strong phenomena expected in several regions.
• Winds: South-southeast 4–6 Beaufort in the west, shifting northwest later (up to 7 Beaufort in the northern Ionian). East: northwest 3–4 Beaufort, later southerly 4–6, and in the north Aegean easterly 5–6 Beaufort.
• Temperatures falling nationwide: 16–18°C max in the north, 20–21°C elsewhere, warmer only in the Aegean islands (24–26°C).

Friday, October 3

• Widespread rain and thunderstorms, strongest in central/eastern Macedonia, Thrace, eastern Aegean islands, and Dodecanese.
• Snowfall in northern mountains.
• Winds: Northwest 5–6 Beaufort (up to 7 in the Ionian), south-southwest 5–6 Beaufort in the east, locally strong in the north Aegean.
• Temperatures dropping further.

Saturday, October 4

• Local clouds with occasional showers, mainly south and eastern Aegean.
• Winds: West/northwest 3–5 Beaufort.
• Slight temperature rise in central and northern Greece.

Sunday, October 5

• Clouds increasing in the west with showers and isolated storms.
• Eastern Aegean: passing clouds.
• Winds: Southwest 3–5 Beaufort, up to 6 Beaufort at sea.
• Temperatures rising, especially in central and northern regions.