Where are the most intense storm warnings located?
The most significant weather disturbances are concentrated in the eastern and southern parts of the country, with Thessaly, the Sporades, and Euboea facing the highest risk of intense localized phenomena. According to the EMY emergency bulletin, these areas should prepare for heavy rainfall and thunderstorms that may persist until the morning of Wednesday, September 23, 2026. Specifically, the coastal and maritime regions of Magnesia in Thessaly are highlighted as high-risk zones where the phenomena are expected to be locally intense during the early morning hours.
The spatial distribution of these weather events is expected to shift as the day progresses. While the morning focuses on the eastern regions, the evening forecast suggests that storm activity will migrate toward the eastern Peloponnese, Crete, Thrace, and Eastern Macedonia. This movement indicates a dynamic weather system that requires constant monitoring, especially for maritime activities and coastal residents in these specific areas.
Regional breakdown of storm intensity
The intensity of the precipitation is not uniform across the Greek territory. In the western parts of the country, the weather is expected to remain largely clear, with only minor, passing clouds in the south and a possibility of light rain in western Sterea Ellada. Conversely, the eastern coastline will experience more sustained cloud cover and thunderstorms until midday. This contrast between the relatively calm west and the turbulent east defines the primary meteorological tension for the day.
What is the temperature forecast for mainland Greece and the islands?
Temperatures across Greece are showing a slight decline as the seasonal transition progresses, with regional variations depending on latitude and proximity to the sea. In northern Greece, temperatures are expected to reach approximately 24°C, while the rest of the mainland will see highs between 25°C and 26°C. The islands will experience a wider range of thermal conditions based on their location in the Aegean and Ionian seas.
Detailed temperature projections for various regions include:
- Western Macedonia: 4°C to 19°C
- Macedonia and Thrace: 6°C to 24°C
- Epirus: 4°C to 25-26°C
- Thessaly: 6°C to 23°C
- Crete: 14°C to 27°C
- Ionian Islands: 17°C to 24-25°C
- North and Northeast Aegean Islands: 12°C to 20-22°C
- Other Aegean Islands: 13°C to 26°C
These figures reflect a typical autumnal pattern where inland areas experience cooler nights and more significant temperature swings compared to the more tempered maritime climates of the islands. The meteo forecast specifically notes a small further drop in temperatures during this period.
How will the weather impact Attica and Thessaloniki?
The major urban centers of Attica and Thessaloniki will experience different weather patterns, though both are expected to see a gradual improvement as the day unfolds. In Attica, the initial forecast includes cloud cover with a probability of localized rain, particularly in the northern and eastern sectors of the prefecture. Winds in the capital will be northerly, with intensities between 3 and 4 Beaufort, gradually weakening as the afternoon approaches.
Temperature ranges in Attica are expected to fluctuate between 17°C and 22°C, though residents in the northern parts of the prefecture may experience temperatures 2 to 3 degrees Celsius lower than the regional average. Thessaloniki is set to see initial cloudiness and the possibility of light, localized rain, but meteorologists anticipate a rapid improvement in conditions. In Thessaloniki, winds will blow from the northwest at 3 to 4 Beaufort, with temperatures ranging from 15°C to 22°C.
What are the wind conditions and sea states expected?
Wind conditions are expected to remain moderate to strong in several areas, primarily driven by northerly directions. Across the Aegean and Ionian seas, winds are projected to blow from northerly directions with intensities reaching 5 to 6 Beaufort in certain gusts. This wind strength, combined with the ongoing rain in eastern regions, suggests that maritime conditions may be unsettled, particularly for coastal and island transit.
The interaction between the northerly winds and the thermal gradients across the mainland will contribute to the localized cooling observed in the temperature data. While the winds in Attica and Thessaloniki are expected to weaken, the broader maritime environment remains subject to the influence of the seasonal weather system, maintaining a Beaufort scale of up to 6 in specific gusts.
When will the weather improve across Greece?
A gradual improvement in weather conditions is anticipated starting from the afternoon of Wednesday, September 23, 2026. While the morning hours are dominated by instability, particularly in the east and south, the meteorological trend points toward a stabilization of the atmosphere as the day progresses. This improvement will be most noticeable in the central and western parts of the country, which were already experiencing more stable conditions.
The transition from stormy to clearer skies will not be instantaneous. In the eastern regions, the reduction in cloud cover and thunderstorm activity will occur following the midday period. For the residents of the Peloponnese, Crete, and Thrace, the weather may remain more unsettled during the evening hours before the broader stabilization takes effect. This phased improvement allows for a clearer outlook for the following days, though the current focus remains on managing the immediate risks posed by the morning storms.
FAQ: Weather in Greece
When will the rain stop in Thessaly and Euboea?
The intense rain and thunderstorms in Thessaly, Euboea, and the Sporades are expected to continue through the early morning hours of Wednesday, September 23, 2026. A gradual improvement in these areas is forecasted to begin from the afternoon onwards.
What are the expected temperatures in Crete?
In Crete, temperatures are expected to range from a minimum of 14°C to a maximum of 27°C. This remains warmer than most mainland regions, following typical maritime patterns for the island during this period of the year.
Will there be strong winds in the Aegean?
Yes, winds in the Aegean and Ionian seas are expected to blow from northerly directions with intensities reaching up to 5 or 6 Beaufort. These winds may impact maritime activities and contribute to the overall unsettled weather pattern.
What is the weather forecast for Attica?
Attica will initially see clouds and a possibility of local rain, mainly in the north and east. However, a gradual improvement is expected throughout the day, with temperatures between 17°C and 22°C and northerly winds of 3 to 4 Beaufort.
How will Thessaloniki's weather change today?
Thessaloniki is expected to experience initial clouds and potentially light, local rain. However, meteorologists predict a rapid improvement in conditions, with temperatures ranging from 15°C to 22°C and northwest winds of 3 to 4 Beaufort.
