The weather pattern in Greece is set to change once again in the coming days. According to forecasts from the Hellenic National Meteorological Service (HNMS) and the analysis by meteorologist Thodoris Kolydas, severe weather phenomena are expected from Friday, peaking on Saturday, impacting many regions, including Attica.

Kolydas, in a social media post, warned about intense instability on Friday and Saturday, noting that improvement is anticipated afterward.

Intense instability on Friday and Saturday, with improvement expected in the following days.

Maximum Temperature Exceeded 31°C on Tuesday, May 27, 2025

The temperature surpassed 31°C on Tuesday, May 27. The highest was recorded at the Galaxidi meteorological station (31.6°C), followed by Stylida in Fthiotida and Krani in Argolis (31.1°C). The map below shows the distribution of maximum temperatures across Greece based on the network of automatic weather stations of the National Observatory of Athens / meteo.gr.

From the data presented, the temperature exceeded 30°C at 7 out of 539 active stations and 25°C at 305 stations (approximately 56%). The average maximum temperature was 25.0°C, which is 2.4°C higher than on May 26 (22.6°C).

Weather: Intense Unstable Conditions Expected for 48 Hours – Which Areas Will Be Affected

Today’s forecast:
Expect local clouds that will gradually increase. From noon onwards, local showers and thunderstorms are expected, mainly in central and southern mainland Greece, Eastern Macedonia, Thrace, the North Aegean, and the mountainous areas of the remaining mainland and Crete. There is a possibility of hail, mainly in mountainous regions.

Temperatures will range from 10 to 22°C in Western Macedonia; 10 to 28°C in the rest of Macedonia and Thrace; 17 to 29°C in Thessaly; 12 to 25°C in Epirus; 12 to 28°C in Central Greece and the Peloponnese; 13 to 25°C in the Ionian Islands; 11 to 28°C in the North and East Aegean; 15 to 27°C in the Cyclades; 19 to 25°C in the Dodecanese; and 13 to 28°C in Crete.

Winds in the Aegean will blow from the west to northwest at 3 to 5 Beaufort. In the Northeast Aegean, winds will come from variable directions at 2 to 4 Beaufort. In the Ionian Sea, winds will blow from northwest at 3 to 5 Beaufort.

In Attica, expect local clouds increasing from the morning with local rain. Winds will be from the northwest at 2 to 4 Beaufort, becoming variable up to 3 Beaufort by midday and afternoon. The temperature in Athens center will range from 20 to 28°C.

In Thessaloniki, expect scattered clouds that will become denser at times. Winds from the northwest at up to 3 Beaufort, strengthening to 4-5 Beaufort around noon and afternoon. The temperature in Thessaloniki will range from 17 to 28°C.

Weather Forecast for Thursday, 29-05-2025:
Partly cloudy with temporary increases in cloud cover initially in Eastern Macedonia and Thrace, spreading to the Ionian, the rest of mainland Greece, the mountainous areas of Crete, and gradually to the eastern islands. Local rain and isolated thunderstorms are expected from noon in the Ionian, mainland Greece, the mountainous areas of Crete and Euboea, and during the evening in the Sporades and Cyclades.

Winds will blow from the northwest at 3 to 5 Beaufort, locally 6-7 Beaufort in the Ionian. Temperatures will remain largely unchanged, reaching 25-27°C.

Weather Forecast for Friday, 30-05-2025:
In the eastern parts, expect partly cloudy conditions with local rain and scattered thunderstorms. The phenomena will gradually decrease, remaining mainly in Crete and the Dodecanese. In the rest of the country, expect few clouds, which will increase locally in the mountainous areas during midday and afternoon, with local rain and isolated thunderstorms.

Winds from the north to northwest at 3 to 5 Beaufort, locally 6 Beaufort in the Ionian. Temperatures will slightly decrease.

Weather Forecast for Saturday, 31-05-2025:
Clouds with local rain are expected in Crete and the Dodecanese until the afternoon. Elsewhere, generally clear weather initially, but clouds will develop in the mainland during midday and afternoon, especially in the northern mountains, where local rain and isolated thunderstorms may occur.

Winds from the northwest at 3 to 4 Beaufort, locally 5 Beaufort. Temperatures will slightly rise.

Weather Forecast for Sunday, 01-06-2025:
In Central Macedonia and Crete, expect clouds with local rain and isolated thunderstorms, mainly in Crete. Elsewhere, generally clear with clouds developing during midday and afternoon, mainly in central and southern areas, with local rain and possibly isolated thunderstorms in the mountains.

Winds from the north, 3 to 4 Beaufort in the west, 4 to 5 in the east, and locally 6 to 7 Beaufort in the Aegean. Temperatures will slightly increase, mainly in the west.

Today’s Weather Highlights:

• Expect local clouds increasing gradually, with rain and thunderstorms mainly in central and southern mainland Greece, Eastern Macedonia, Thrace, North Aegean, and mountainous regions.
• Temperatures generally range from 10 to 29°C, with higher values in the south and east.
• Winds mostly from the northwest, moderate in strength.