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Weather Bulletin for Wednesday, August 21, 2024

General Situation:


This Wednesday, moderate west-northwest flow in the Channel on the edge of an anticyclone at 1027 hPa centered to the west of the Azores. Thursday, moderate southwest flow in the Channel between an anticyclone at 1016 hPa, centered on Poland and a depression at 971 hPa, centered to the east of Iceland.

Friday, sustained southwesterly flow in the Channel between an anticyclone at 1019 hPa, centered on Belarus and a depression at 985 hPa (former hurricane Ernesto), centered on Scotland.


Weather conditions in Rouen


  • Wednesday August 21

Cloudy sky with beautiful clearings.

Wind: light westerly flow 10-15 km/h with gusts around 35 km/h in the afternoon

Temperatures: 12 to 20°C

Risk of precipitation: 0%


  • Thursday August 22

A very beautiful sunny day but the sky is getting cloudy in the late afternoon

Wind: light southwest flow at 15-20 km/h (gusts to 40 km/h)

Temperatures: 11 to 24°C

Risk of precipitation: 0%


  • Friday August 23

Very cloudy to overcast sky.

Wind: sustained southwest flow at 25-30 km/h (gusts to 50 km/h)

Temperatures: 17 to 24°C

Risk of precipitation: 0%


Weather trend in Le Havre


  • Saturday August 24

Very cloudy sky with the passage of a very active rain front during the day

Wind: moderate southwest flow, 20 to 30 km/h (gusts to 55 km/h) in the morning, turning west in the afternoon (25 to 30 km/h and gusts to 45 km/h)

Temperatures: 17 to 18°C

Chance of precipitation: 80%


  • Weather conditions for departure from Le Havre this Sunday, August 25 at 3 p.m.


After having delivered from Rouen to Le Havre this Friday, August 23, the skippers will set sail from the Bay of Seine this Sunday, August 25 at 3 p.m. The start of the first leg between Rouen and Gijon (Spain) will take place under particularly light wind conditions. To date, there are still significant divergences in the weather models concerning the exact positioning of the high pressure ridge which would move more or less north depending on the scenarios. The most likely scenario (70% reliability) today predicts a light west-northwest wind, around 2 to 5 knots only. The start could therefore be quite slow with this ridge spreading more and more towards the North Sea. The sailors should sail during the first hours of the leg, under calm seas, due to the passage of the cold front the day before. Waves of 0.5 to 1 meter are still possible in the middle of the afternoon. The solo sailors will then enter a coastal course to Cap de la Hague. They will certainly have to move away from the coast a little to benefit from a little more flow around 10-15 knots.



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