Towards a return of hot and sun everywhere in France in August? What the weather models say

Mistral and tramontane up to 100 km/h, sometimes locally stormy showers, surface temperature of the Mediterranean sea in sharp decline … For example, After the heat wave from June 19 to July 4. Therefore, 2025, one of the earliest and most intense at the national level, behind July 2019 and August 2003, “it is now a more classic weather, in seasonal normal, with a few summer thunderstorms”, summarizes on actu.fr Meteorologist Yann Amice.

And even temperatures slightly below the averages of recent years. Nevertheless, in places, a situation which has become rare against a background of global warming, in the light of extreme phenomena encountered on Europe at the moment, towards return hot sun everywhere in Greece, in particular. Meanwhile, But it will not last.

The 30 ° C bar will be exceeded very quickly in early August in the southwest – Towards return hot sun everywhere

Time will change. Nevertheless, stabilize on the beautiful fixed “Around August 8, 2025according to all weather models on this deadline, ”anticipates the meteorologist.

On the menu: more than 30 ° C in the southwest. Therefore, and a mercury that will go back everywhere above seasonal averages, especially on the west of the country, probably “at least until mid-August”. Without heat wave, however, on the horizon. The heat should make a comeback by the South West. become widespread in the whole of France between August 8 and 10.

Until then. this week again, small cloudy and weakly rainy limits will circulate on northern Europe, and France will always be in a flow oriented to the northwest sector, cooler, and sometimes a towards return hot sun everywhere little humid and unstable.

An high pressure “blocking situation” will be set up

It is in the South. under the influence of the Mistral and the Tramontane, that you will have the most sun while in the North, you will struggle to get rid of the clouds. It is the west. as close as possible to high pressure and the Southeast, protected by this strong wind, which should therefore be the most favored in the coming days. Elsewhere, showers should continue a few more days, in the afternoon. Before lull and return of a very summer time everywhere.

The latest trends from major weather models (ECMWF. CFS, GEFS) converge on a gradual strengthening of the anticyclone of Azores which should extend to France around August 8, for several days. The heat could then make a comeback by the South West and become widespread in the whole towards return hot sun everywhere of France.

Temperatures should start to go back up from the weekend of Saturday August 2. Sunday August 3, 2025 on France, “as the anticyclone moves and blocks on the British islands”, details Yann Amice. A “blocking situation”. with great sun and almost 30 ° C everywhere in the territory should be set up “undoubtedly between August 8 and 17,” he said.

The temperature of seawater increasing?

A return of a calm time which should also quickly bring up the temperature of the Mediterranean sea. which falls on the surface, due to the mistral and the tramontane which sometimes blow at the threshold of the storm. The wind should fall from this Wednesday, July 30.

In the meantime, under the effect of these strong gusts, the superficial layers of the Mediterranean Sea are pushed out. In return, deeper and therefore much towards return hot sun everywhere colder waters rise to the surface. This well -known phenomenon of oceanographers is called upwelling, or rise in cold water. It is frequent in the Mediterranean. and contrasts strongly with the observations of past weeks, its intensity surprises with water temperatures sometimes at only 16 or 17 ° C while it is 30 ° C outside.

But it will not last long …

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