The second heat wave of this summer starts today and will last through Wednesday, according to meteorologists. However, it will be moderate, with thermometers locally on the mainland topping 40 degrees by Monday and temperatures will drop significantly on Thursday, with winds increasing to very strong in the seas.

According to the updated weather forecast issued at noon on July 4, very high temperatures are forecast in Greece today (06-07-25) until Wednesday (09-07-25).

The temperature rise started yesterday in the west and Macedonia and in the rest of Greece today.

The highest values (maximum values above 40 degrees) will be recorded from Monday (07-07-25) in the interior of mainland Greece and mainly in the west, central and north.

It should be noted that:

A. In the coastal areas of the mainland the maximum temperature will be 2 to 4 degrees lower than the temperature in the interior of mainland Greece.

Β. The relative humidity will be low (indicatively 20% to 30% during the midday hours in the interior of the mainland).

C. Minimum temperatures on Monday, Tuesday and Wednesday in urban centres will remain high and will be around 26 to 28 degrees Celsius.

In more detail:

1. Maximum values will reach:

a) in Macedonia, Thessaly, Epirus and western Sterea 38-39 degrees Celsius and possibly 40 degrees Celsius locally.

b) in eastern Central Greece and the Peloponnese 37 to 39 degrees Celsius.

c) in the Ionian islands 35 to 36 degrees Celsius.

2. On Monday (07-07-25) very high temperatures will be recorded on the Ionian islands and all the mainland, while the temperature will also rise in the eastern islands. Maximum values will reach:

a) in mainland Greece 39 to 40 and in some places 41 degrees Celsius.

b) in the Ionian islands, the islands of the Eastern Aegean and the Dodecanese islands 36 to 38 degrees Celsius.

3. On Tuesday (08-07-25) and Wednesday (09-07-25) a slight drop in high temperatures is expected in the Ionian and western mainland and a slight rise (by about 1 to 2 degrees) in the eastern mainland and the Aegean. It is estimated that the maximum values will reach 41 to 42 degrees Celsius in some places on the mainland.

Giannopoulos: Heat wave of moderate intensity

As ERT meteorologist Panagiotis Giannopoulos said, “the second heatwave of this summer is just around the corner. It will be of moderate intensity, the thermometers locally on the mainland will exceed 40 degrees from Monday. It will end on Wednesday, On Thursday the temperature will drop significantly and winds will increase to very strong in the seas.”

According to the weatherman, generally clear weather is forecast for Sunday. Scattered clouds in the central and northern continental highlands at noon in the afternoon and there is a possibility of a few showers in the highlands of Epirus and Macedonia. Winds in the Ionian Sea northwest 3 to 4 Beaufort. In the Aegean from northern directions 4 to 5 locally 6 Beaufort. The temperature will reach 37 to 39 degrees Celsius on the mainland, 35 to 36 degrees in the Ionian and eastern Aegean, 30 to 33 degrees in the Cyclades and Crete.

In Attica, sunshine is forecasted. The winds will be northerly in the east at 5 Beaufort. The temperature will range from 24 to 38 degrees, in the coastal areas it will be 2 to 3 degrees lower. In Thessaloniki the weather will be clear. The winds will be light. The temperature will range from 24 to 36 degrees.

On Monday, clear and warm weather is forecast. Winds in the Aegean Sea north northwest 4 to 6 Beaufort, light in the Ionian Sea. The temperature will rise slightly, reaching 39 to 40 degrees in the mainland and locally 41 degrees in areas far from the sea.

Chatraphyllis: Weaker heatwave

Meteorologist George Tsatrafyllias says in a Facebook post that the heatwave will arrive “more weakened”. According to him, the country will be in the grip of a “mild heatwave in the three-day period Sunday-Tuesday” with the mercury reaching 41 degrees on July 8.

He also provided a table showing temperature trends in major cities over the next few days and in Athens the mercury will climb to 40 degrees on Tuesday. According to the meteorologist, the temperature will reach 41 degrees in Serres and Larissa.

“Impressive drop in temperature on Thursday. Within two 24 hours even 13 degrees,” he said.

Marousakis: Gusty north winds coming

Meteorologist Klearchos Marousakis is predicting “quite difficult conditions over the four days Sunday to Wednesday” with the mercury “breaking” even the 40 degrees Celsius barrier.

In a Facebook post, the meteorologist calls for “great caution as this strong heat wave completes its action” as “the collision of the very warm air mass with the colder one that will follow (Wednesday – Thursday), will strengthen the north winds at storm levels, significantly raising fire danger levels (very likely extreme danger locally).”

The temperature reached 40 °C on Saturday 05/07/2025

High temperatures prevailed on Saturday 5 July 2025, especially in the western and northern parts of the country where the mercury reached 39-40 °C in some places.

As shown in the map below, according to the network of automatic weather stations of the National Observatory of Athens/meteo.gr, 70 weather stations in the network recorded maximum temperatures above 37 °C.

Today’s weather

Across the country there will be very good weather and high temperatures. During the warm hours of the day clouds will develop in the continental mountains and local rain will occur in the northwestern mountains.

The temperature will range in Western Macedonia from 16 to 34-36 degrees, in the rest of Macedonia and Thrace from 18 to 35-37 and locally 38 degrees, in Thessaly from 16 to 38-39 and locally 40 degrees, in Western Greece from 22 to 38-40 degrees, in the rest of the mainland from 22 to 37-39 degrees Celsius, in the Ionian Islands from 21 to 34-36 degrees, in the Aegean islands and in Crete from 21 to 32-34 degrees, while in the East Aegean islands the maximum temperatures will reach 36-38 degrees Celsius locally.

In the eastern part of the island, in the south-eastern part of Greece, the temperatures will be in the region of 36-38 degrees Celsius.

Winds in the Central and North Aegean will blow from the north with intensities of 3-5 Beaufort and in the South Aegean west with the same intensities. In the Ionian Sea the winds will blow from the west northwest with intensities of 2-4 Beaufort.

In Attica we expect sunshine and quite warm. The winds will blow north northeast with intensities 2-4 Beaufort. The temperature will range from 26 to 38 degrees.

In Thessaloniki we expect sunshine with local clouds during the warm hours of the day. The winds will blow mainly from southern directions with intensities of 2-3 Beaufort. The temperature will range from 25 to 35 degrees.

The weather on Monday, July 7

Generally clear weather. Scattered clouds in the continental mountains in the midday – afternoon hours, with the possibility of local rain in the mountains of Macedonia and Thessaly.

Winds in the west will blow from westerly directions 3 to 4 and gradually in the south up to 5 Beaufort. In the east will blow north-northwest and gradually west-northwest 3 to 4 and in the Aegean Sea locally 5 Beaufort.

The temperature will remain high on the Ionian islands and on all continents, while it will also rise on the eastern islands. The maximum values will be:

a) in mainland Greece 39 to 40 and in some places 41 degrees Celsius.

b) in the Ionian Islands, the East Aegean Islands and the Dodecanese islands 36 to 38 degrees Celsius.

The weather on Tuesday 8 July

The weather will be generally clear. Occasional clouds in the central and northern mountainous areas in the midday – afternoon hours.

Winds will blow west northwest 3 to 5 Beaufort, and in the southern seas locally 6 Beaufort, while in the morning hours in the north it will be variable 3 to 4 Beaufort.

The temperature will rise slightly further in the east and will remain high. It is expected to reach 41 to 42 degrees Celsius in some places on the mainland.

The weather on Wednesday, July 9

Generally clear weather. Local clouds in the noon – afternoon hours in the north and in the mountainous areas of central Greece, with the possibility of local rain in eastern Macedonia and Thrace.

Winds will blow west northwest 3 to 5 and in the southern seas locally 6 Beaufort. From the afternoon in the west and from the evening in the north will blow north-northwest and will locally reach 6 Beaufort.

The temperature will drop slightly in the west, but in the rest of the country it will remain high.

The weather on Thursday, July 10

In the northeast, partly cloudy with local showers and isolated thunderstorms in Macedonia and Thrace, improving from late evening. In the rest of the country, generally clear weather with a few clouds that will increase in the midday – afternoon hours on the mainland, when local rain and occasional rain showers in the mountains will occur.

The winds will blow from the north 4 to 6 and in the sea locally 7 Beaufort.

The temperature will drop mainly in the north and central regions, while in the southeast it will remain high.