The swell will show early Tuesday for you but will slack off earlier around Thursday to leave a rather confused swells with offshore winds. There could be some easterly wind waves as well later. This is a special long range forecast for The Basque coast around Biarritz and Bakio. The Bay of Biscay will be relatively quiet for the crossing on wednesday and the swell small and almost flat for the run up to the competition however a strong new swell should start to show on Sunday 23rd this will grow and continue thhrough the week. It is rather early for accuracy bur there seems to be good prospects that the worst effects of the low will stay out at sea.
Northerly winds dominate a small south westerly swell.
The Atlantic high is slowly approaching as lows run round the top to give us northerly wind this weekend. By the middle of next week it will have gone further and the winds will be north easterly as the high squeezes a low over Denmark. A weekend of moderate sized messy north westerly wind waves for the north coasts. South coasts, mid wales, SE ireland and sheltered spots should be much cleaner but much smaller as the underlying south to south westerly swells from the lows way out in the Atlantic get a chance to show themselves. Your small northerly wind waves will get a bit bigger through the weekend and then could get quite big south of the Humber as quite a stong easterly wind sets in mid week.