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Heat wave 'invades' Greece, temperatures up to 44 degrees in some areas

2025-07-18 10:43:05Kosova&Bota SHKRUAR NGA REDAKSIA VOX

Heat wave 'invades' Greece, temperatures up to 44 degrees in some

Greece is on the verge of a new and quite intense heat wave, with forecasts indicating that starting Monday and for several days the thermometer will rise above 40 degrees.

The forecasts are quite grim, as it is not excluded that we will see temperatures that in some places will reach 42 to 44 degrees Celsius. The nights will also be difficult when the temperature will remain at high levels and it is not excluded that it will even reach 30 degrees.

What do meteorologists say?
In their posts, meteorologists focus on the high temperatures and long duration of the phenomenon, which will be the strongest so far this year.

Meteorologist Thodoris Kolydas, in his post titled "A heat wave is very close, with some reservations," points out that although forecast models agree on the arrival of a warm air mass from Africa, the available data is not yet sufficient to activate official operational warnings.

He concludes with the observation that “Public confidence in forecasting is strengthened not by exaggerations, but by reliable, restrained, and timely assessments based on the latest data.”

The entire post by Theodore Kolidas:

Our data show that the atmospheric configuration that leads to a warm rise is not just possible – it is dominant.

We will talk about the predicted values with very good probabilities from next Friday onwards, as there are still some reserves. The next heat wave is possible, but it is not yet ripe for heat wave level announcements with operational measures.

“850 hPa maps are an excellent tool for identifying thermal trends, but not a tool for panic or premature numerical assessments. The ethical responsibility of meteorologists and scientists is to inform clearly, but also with honest reservations, when conditions do not allow it. Public confidence in the forecast is not strengthened by exaggerations, but by reliable, restrained and timely assessments, based on the latest data.”

George Tsatrafillias points out that the hottest day will be Tuesday, without ruling out outbreaks in the following days. He adds that we will see high temperatures until Saturday, July 26.

In the same context, Clearchos Manousakis writes that "we are still not able to see the "ceiling" of temperatures, as well as the duration of maximum values."

He emphasizes that until Sunday temperatures will not change from those of the last 24 hours and in fact "we expect a slight drop in mercury on Friday - Saturday, more noticeable towards the central and mainly northern parts."

However, the fire risk "remains at high levels" as "the instability that will prevail towards the north over the next three days could cause dry storms, resulting in lightning that could cause fires."

For his part, Yannis Kallianos says that the heat wave that will begin on Monday “will clearly be stronger than the previous ones so far this summer, but it will not be unprecedented. It will be quite strong, but of course we have experienced similar ones before”. It will be the strongest of the summer so far, both in terms of the maximum temperatures it will produce (42-43°C and locally perhaps 44°C), and in terms of its duration (most likely 5 days, until Friday, July 25).

Before I proceed with the assessment of average maximum temperatures in various cities in Greece, I would like to clarify the following:

The temperature values for July 22, 24 and 25 come from medium-range forecasts of numerical weather models (e.g. ECMWF, GFS, ICON, AIFS, UKMO, ARPEGE) and are predictive estimates with slightly lower reliability compared to the short-term forecast. Due to the increasing uncertainty that characterizes the forecast fields beyond five days, revisions may occur as newer observational and analysis data (data assimilation) are incorporated into the models. There will be an updated update as we approach the specific dates.”

His estimates for temperatures in major cities:

* ATHENS *
– Friday, July 18: 36°C
– Saturday, July 19: 36°C
– Sunday, July 20: 38°C
– Monday, July 21: 39-40°C
– Tuesday, July 22: 41-42°C
– Wednesday, July 23: 40-41°C
– Thursday, July 24: 41-42°C
* THESSALONIKI *
– Friday, July 18: 34°C
– Saturday, July 19: 35°C
– Sunday, July 20: 36°C
– Monday, July 21: 37-38°C
– Tuesday, July 22: 38-39°C
– Wednesday, July 23: 39-40°C
– Thursday, July 24: 39-40°C
* PATRA *
– Friday, July 18: 32°C
– Saturday, July 19: 32°C
– Sunday, July 20: 34°C
– Monday, July 21: 35-36°C
– Tuesday, July 22: 39-40°C
– Wednesday, July 23: 37-38°C
– Thursday, July 24: 37-38°C
* HERAKLION *
– Friday, July 18: 32°C
– Saturday, July 19: 31°C
– Sunday, July 20: 32°C
– Monday, July 21: 34-35°C
– Tuesday, July 22: 37-38°C
– Wednesday, July 23: 38-39°C
– Thursday, July 24: 37-38°C
* LARISSA *
– Friday, July 18: 36°C
– Saturday 19 July: 36°C
– Sunday 20 July: 39-40°C
– Monday 21 July: 41-42°C
– Tuesday 22 July: 43-44°C
– Wednesday, 23 July: 41-42°C – Thursday,
24 July: 42-43°C
* ARGOS – NAFPLIO *
– Friday, 18 July: 38°C
– Saturday, 19 July: 36°C – Sunday, 20 July: 39°C – Monday, 21 July: 39-40°C – Tuesday, 22 July: 41-42°C – Wednesday, 23 July: 41-42°C – Thursday, 24 July: 42-43°C * LAMIA * – Friday, 18 July: 36°C – Saturday, July 19: 34°C – Sunday, July 20: 39°C – Monday, July 21: 41-42°C – Tuesday, July 22: 43-44°C – Wednesday, July 23: 41-42°C – Thursday, July 24: 41-42°C

Meteorologist George Tsatraphyllias declares in a Facebook post that "the obsessive heat will culminate in an African heat wave, and even a strong one."

"The forecast for a strong heat wave from July 20 to 24 continues today. In fact, the most difficult days will be Tuesday, July 22 and Wednesday, July 23. On these days, the heat wave seems to be particularly "aggressive" with the mercury exceeding 43-44 degrees," predicts Mr. Tsatraphyllias and concludes by noting that "the tension will ease from Friday, July 25 with mild temperatures until the end of the month."

Risk to vulnerable groups

It should be noted that prolonged hot conditions combined with the lack of cooling and thermal relief at night significantly increase the risk to human health. Therefore, the implementation of protective measures (e.g. regular showering with cool water) by all population groups, and especially by the most vulnerable (the elderly, outdoor workers, children, pregnant women, people suffering from chronic diseases, etc.) is strongly recommended.


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