Roller coast ride
I was in Porthcawl this morning, down at the Pavilion and it felt quite pleasant in the sunshine with no wind.
Temperatures here reached 8 Celsius this afternoon but are going to drop over the next few days with a mixture of sunshine, frost and wintry showers.
There is a risk of some snow too and the Met Office has issued a watch for Friday. Nothing definite but it worth keeping a eye on...
The jet stream in the upper atmosphere is shaped like a roller coaster at the moment and we're on the cold side of a big dipper and will remain so, well into next week.
In meteorology this is called an Omega Block because it resembles the shape of the Greek letter Omega. These blocks can last for some time before breaking down.
The weekend will be unusually cold for this time of year with a significant wind chill.The odd snow shower is also possible but it will otherwise remain dry with some sunshine.
Next week, looks bitterly cold with a risk of more significant snow and strong to gale force winds so keep the de-icer handy and don't forget to feed the birds!
If you're travelling, you can keep up to date with the latest travel news on Radio Wales, Radio Cymru and Online at www.bbc.co.uk/wales