Weather: deterioration from tomorrow with northerly winds, showers and high lightning frequency

Meteorologists are forecasting widespread instability, resulting in a noticeable drop in temperatures, showers, and a high frequency of lightning. Meteorologist Klearchos Marousakis has also warned of possible flooding phenomena.

In a post, the OPEN TV meteorologist referred to the change in weather from heatwave to instability and northerly winds, which will become more noticeable from Thursday onward.

“A disturbance from the region of Italy will move east-northeast, triggering instability over the central and northern parts of our country as well as the interior of the Peloponnese over the Thursday–Friday period,” he notes.

According to Marousakis, the forecast shows:

A large volume of water locally that could lead to minor flooding episodes

Frequent lightning

Hailstorms with possibly large hailstones

Sudden squalls in marine and coastal areas

Abrupt wind strengthening during phenomena

Generalized strengthening of northerly winds up to 7 Beaufort, especially in areas facing the Aegean

Long-term trend

The gradual shift of high-pressure systems to higher latitudes will direct disturbances towards our region. This means that until around August 12–15, unstable weather will prevail, with air mass flows mainly from central Europe rather than northern Africa, preventing intense and prolonged heat waves.

Today’s Weather (30.07.2025)

Fair weather is expected with local showers in the western and northern mainland (especially mountainous areas).

Temperatures:

Western Macedonia: 12–30/31°C

Rest of Macedonia & Thrace: 15–35°C

Thessaly: 15–35°C

Epirus: 12–30/31°C

Rest of Western Greece: 14–30/32°C

Rest of mainland: 13–35°C

Ionian Islands: 20–30°C

Aegean islands & Crete: 17–30/32°C

Winds: In the Aegean and Ionian, generally northwesterly, up to 4–5 Beaufort, locally up to 6 Beaufort in the south.

Attica: Fair weather. Winds variable, up to 3–4 Beaufort, temporarily 5 Beaufort in the west in the morning. Temperatures 26–34/35°C.

Thessaloniki: Fair weather. Winds northwesterly up to 3–4 Beaufort, later shifting variable 2–3 Beaufort. Temperatures 26–34°C.