The ongoing heatwave is gradually subsiding, with high temperatures persisting today (below 40°C), but a significant drop is expected from tomorrow. Rain is forecast over much of mainland Greece on Thursday.

Meteorologist Klearchos Marousakis spoke of a weather shift starting Wednesday, bringing a breath of cool air. However, on Thursday – and locally on Friday – rainfall, thunderstorms, and even hail are expected in some areas.

“We’ll get a break from the heat starting Wednesday, but with rain bringing problems in Northern Greece. A clash between two air masses will take place – a cold front from the northern Balkans will collide with the very warm air already in the country, leading to severe instability with heavy rain, intense lightning, and hail in central and northern regions,” he explained.

“On Thursday, rain and storms are expected from midday and into the evening, starting in the Peloponnese and moving northwards. Locally, these events may be intense, possibly causing minor flooding. Friday also requires caution, as the phenomena shift eastward and offshore,” he added.

Kolydas: Brief unstable weather expected Thursday and Friday

🎯ΑΠΟ ΤΗΝ ΘΕΡΜΗ ΕΝΤΑΣΗ ΣΤΗΝ ΗΠΙΑ ΣΥΝΕΧΕΙΑ
✅Δεν διαφαίνεται κάποια αξιόλογη μεταβολή της θερμοκρασίας από τα δύο μεγάλα προγνωστικά μοντέλα (ECMWF & GFS) για την περιοχή της Αθήνας , αλλά και τον ευρύτερο Ελληνικό χώρο τις επόμενες μέρες.
✅Παροδικά φαινόμενα αστάθειας στα… pic.twitter.com/jc04iarKoq

— Theodoros Kolydas (@KolydasT) July 28, 2025

Meteorologist Thodoris Kolydas noted in a post that no significant change in temperature is expected according to the two major forecasting models (ECMWF & GFS) for Athens and wider Greece in the coming days, though brief storms are expected on the mainland Thursday and Friday.

Monday, July 28: Max temperatures near 40°C

High temperatures persisted on Monday, especially in eastern and northern mainland regions, with peak readings between 37–39°C. According to the National Observatory of Athens / meteo.gr, the highest temperature was recorded in Stylida, Fthiotida, at 39.8°C.

A map below shows maximum temperature distribution across Greece and the 8 stations with the highest recorded temperatures. White circles mark stations where the maximum exceeded 37°C. In total, 77 out of 560 active stations recorded temperatures above 37°C. The national average maximum was 33°C.

In Attica, temperatures also soared to 36–38°C, with the highest recorded in Avlonas at 39.2°C.

Today’s Weather

Clear skies are expected, with local showers in western and northern mainland areas.

• Temperature ranges:
  • Western Macedonia: 11–31°C
  • Rest of Macedonia & Thrace: 14–37°C
  • Thessaly: 15–36°C
  • Epirus: 12–30°C
  • Rest of western Greece: 14–32°C
  • Central mainland: 15–37°C
  • Ionian Islands: 20–31°C
  • Aegean Islands & Crete: 19–32°C
• Winds: Generally from the northwest–west at 4–5, locally 6 Beaufort in the Ionian and Aegean.
• Attica: Clear skies, winds west–northwest at 4–5, locally up to 6 Beaufort in western areas. Temperatures between 25–37°C.
• Thessaloniki: Clear skies, variable winds at 2–4 Beaufort. Temperatures from 26–36°C.

Weather for Wednesday, July 30

Mostly clear weather across the country. In the afternoon, clouds will develop over northern mainland regions, with possible local showers. Temporary cloud cover and showers may also affect other inland mountainous areas later in the day. Visibility may be limited in western areas in the morning.

• Winds: Northwest at 3–5, locally up to 6 Beaufort.
• Temperature: Slight drop, max values between 33–35°C, and 36–37°C in eastern regions.

Weather for Thursday, July 31

Initially unsettled in Macedonia and Thrace, gradually spreading to Thessaly, the Sporades, Euboea, and by midday to the rest of the mainland. Rain and scattered thunderstorms are expected, possibly strong in the north. Weather will improve in most areas by the evening, except for the Sporades and Euboea, where instability will persist. Other regions will remain mostly clear. Visibility may be limited in the west during the morning.

• Winds: From the north at 4–6, locally 7 Beaufort in the Ionian.
• Temperature: Slight drop, mainly in the north.