For The Arch :
No gale warning.
The reliability of the situation is assessed at 90%.
Fair weather with mostly clear skies. In the evening, cloud and long sunny periods.
No precipitation. SSE force 1 turning NW in the middle of the day then SE force 2. Gusts reaching 8 knots in the morning. Smooth sea. Low, short swell from WNW. Good visibility becoming good in the middle of the day then poor.