A southwesterly, very strong and very variable flow prevails over the whole area.
For Portstewart :
Warning moderate gale offshore.
The reliability of the situation is very good.
Skies very cloudy to overcast in the morning, very cloudy skies becoming totally covered in the afternoon. No precipitation in the morning, drizzle in late afternoon. In the evening, very cloudy skies to overcast.
Drizzle fading over time. SSE force 4 turning SSW force 5 in the middle of the day then SW. Gusts reaching 31 knots in the evening. Slight sea. Low, long swell from NNW. Visibility reduced by mist becoming excellent in the middle of the day.