For Thatcher"s Rock :
No gale warning.
The reliability of the situation is good.
Fair weather with mostly clear skies. In the evening, very cloudy skies becoming totally overcast.
No precipitation. WNW force 3 in the morning turning SW in the evening. Gusts reaching 16 knots in the morning. Smooth sea. Low, fairly long swell from SE. Excellent visibility becoming excellent in the middle of the day then good.