A northerly and mostly variable flow prevails over the South-East of the basin. Over the West and the North, it is southwesterly, moderate and mostly variable.
For Portstewart :
No gale warning.
The reliability of the situation is very good.
Very cloudy. Light showers. In the evening, cloudy spells, sometimes dense.
No precipitation. WNW wind force 3 from the middle of the day. Gusts reaching 18 knots. Smooth to slight sea. Low, short swell from NW. Excellent visibility.