A southerly and very variable flow prevails over the North-East of the basin. Over the South and the West, it is westerly, strong and particularly variable.
For Testaccio :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Changeable skies completely clouding over during the morning, increasing sunny spells in the afternoon. Showers all day. In the evening, lots of good clear periods.
No precipitation. S force 3 in the morning turning WNW force 4 in the middle of the day. Gusts reaching 24 knots in the middle of the day. Slight sea becoming moderate in the middle of the day then rough. Low, short swell from S then moderate from W in the middle of the day then, fairly long swell from W. Excellent visibility.