A northerly, moderate and very variable flow prevails over the South and the East of the basin. Over the North-West, it is westerly, strong and variable.
For Portstewart :
No gale warning.
The reliability of the situation is very good.
Fair weather with mostly clear skies. In the evening, very cloudy.
Chance of light rain. NNW force 3 in the middle of the day turning WNW in the evening. Gusts reaching 17 knots in the middle of the day. Slight sea. Low, short swell from NNW. Excellent visibility.