A southerly, very strong and very variable flow prevails over the whole area.
For Caernarfon Marina : Warning strong breeze offshore.
The reliability of the situation is very good.
Clear periods developing.Light rain gradually becoming less frequent.In the evening, very cloudy skies becoming totally overcast. Showers towards the end of the night. S force 5 in the middle of the day becoming force 4 in the evening. Gusts reaching 33 knots in the middle of the day. Slight sea. Low, fairly long swell from WSW. Poor visibility becoming excellent in the evening.
semaphore stations
Station Valley RAF located 22 km from Caernarfon Marina