Weather: Temperatures rise today before gradual drop tomorrow – What the Rex Block will bring

Summer Weather Continues Briefly Before Weekend Showers

The upwind volition proceed to consciousness similar summertime today, with temperatures rising somewhat and reaching up to 33°C. However, starting tomorrow, Thursday, temperatures volition gradually drop, and forecasters expect showers implicit the weekend.

Meteorologist Klearchos Marousakis referred successful a station to the “Rex Block” upwind signifier and explained however it creates an explosively unstable atmosphere, often starring to utmost weather.

“The missive Y depicts the extended anticyclone stretching toward bluish Europe. The missive X represents the low-pressure strategy blocked by this anticyclone, forcing it to stay implicit the aforesaid geographical country for days.
On 1 side, the anticyclone pushes colder aerial from bluish Europe into the low, portion connected the different broadside the debased interacts with lukewarm oversea regions. This enactment produces an explosively unstable atmosphere, resulting successful utmost weather.
Our survey already shows a important accidental this atmospheric circulation volition impact our country. We should beryllium prepared for unsafe conditions.”

Meanwhile, Theodoros Kolydas struck a much cautious tone, noting that not each regions—particularly successful Eastern Greece—will acquisition the aforesaid instability.

“We had mentioned a fewer days agone that rains, though delayed, volition yet arrive. Still, we should ‘keep a tiny basket’ due to the fact that of the predicted circulation signifier (Rex Block).
Unlike the acquainted Omega Block, the Rex Block tin prolong a slump successful spot for days, starring to prolonged effects. This seems to beryllium occurring chiefly implicit Italy. If the debased were a small further east, we’d beryllium having overmuch much enactment here.
But don’t expect each areas to payment from this system, particularly successful Eastern Greece.”

Chilly Start successful Northern Greece

On Tuesday morning, temperatures dropped to conscionable 2°C astatine the upwind presumption successful Mavrolithari, Fokida. Ochyros Nefrokopi and Neapolis Kozani some recorded lows of 4.4°C. According to the National Observatory of Athens (meteo.gr), 8 stations recorded the coldest minimums connected the greeting of September 23.

Η ΜΕΤΕΩΡΟΛΟΓΙΑ ΜΕ ΑΠΛΑ ΛΟΓΙΑ
✅Πριν από λίγες ημέρες είχαμε μιλήσει ότι οι βροχές παρότι αργούν θα έρθουν, αλλά θα πρέπει να κρατάμε μάλλον "μικρό καλάθι" , λόγω της προβλεπόμενης ατμοσφαιρικής κυκλοφορίας ( Rex Block) ,
✅Η μεγάλη διαφορά αυτού του artifact σε σχέση με το γνωστό… pic.twitter.com/NhqHs7e0ek

— Theodoros Kolydas (@KolydasT) September 23, 2025

Today’s Forecast

• General conditions: Mostly clear, with clouds gathering astatine noon and successful the day implicit the mainland and Crete. Localized showers are imaginable successful mountainous mainland areas and confederate Chania. Evening and greeting visibility whitethorn beryllium constricted successful places.
• Temperatures:
  • Northern Greece: 14–31°C (Western Macedonia: 11–28°C)
  • Epirus: 14–29°C
  • Thessaly: 14–33°C
  • Ionian Islands: 17–28°C
  • Sterea & Peloponnese: 17–31°C
  • Aegean Islands: 16–27°C (Rhodes: 22–28°C)
  • Crete: 13–29°C
• Winds: Westerly successful the westbound and northwesterly successful the east, 3–5 Beaufort.

Attica: Sunshine, with northwest winds turning southerly successful the day (2–4 Beaufort). Temperatures: 17–30°C.
Thessaloniki: Mostly clear, airy adaptable winds (2–4 Beaufort). Temperatures: 14–29°C.

Outlook

Thursday, September 25
Clear successful the morning, with clouds processing by midday successful bluish mainland areas and aboriginal successful different upland regions. Local rain is expected, with isolated thunderstorms successful eastbound Macedonia. Local greeting showers are imaginable successful the Ionian. Visibility is constricted successful the west.

• Winds: Northerly 3–5 Beaufort, locally 6 successful the Aegean.
• Temperatures: Slightly little successful the north, 28–30°C generally, up to 31°C inland, 27°C successful the Sporades/Cyclades, and 28–29°C successful Crete.

Friday, September 26
Clouds with section showers successful eastbound mainland, Evia, the Cyclades, and Crete until afternoon; clearer elsewhere, though showers whitethorn make successful the westbound aboriginal successful the day.

• Winds: Northerly 3–4 Beaufort successful the west, 4–6 successful the east, 6–7 successful the Aegean.
• Temperatures: Dropping further, particularly successful the east.

Saturday, September 27
Showers and storms successful the Ionian from morning, spreading to the occidental mainland later. Elsewhere, partially cloudy with clearer skies successful confederate regions.

• Winds: South-southeast 4–5 Beaufort successful the west; northerly 4–6 successful the east, up to 7 successful the Aegean.
• Temperatures: Falling crossed the country.

Sunday, September 28
Widespread unreality screen with showers and occasional storms, starting successful the Ionian and occidental mainland, past moving east. Crete and the Dodecanese volition spot lighter unreality screen and lone a fewer showers.

• Winds: Southerly successful the west, northerly successful the east, 4–6 Beaufort, locally up to 7 successful the Aegean.
• Temperatures: Continuing to drop.