The Mumbles Coastguard station is a great place to keep an eye on the weather and on a clear day you can see for miles along the coast and across the Bristol Channel towards Ilfracombe in Devon.
There is an automatic weather station there, one of many dotted around the country. It takes measurements of temperature, wind speed, wind direction and rainfall.
The data is then sent electronically to the Met Office in Exeter and the information from a selection of locations can be viewed online.
There's more warm weather to come over the Easter weekend with some sunny spells but also some cloud and a risk of a showers which could be heavy with thunder. The showers, though, will be hit and miss, so a fair number of places will stay dry.
Temperatures will rise into the low 20's Celsius but some coasts will be cooler, especially in the north and west where temperatures will be lower on Sunday and Monday with a breeze off the sea.
At the moment Bank Holiday Monday looks cloudier and breezier. Temperatures on Monday 18 to 20 Celsius in the south and 13 to 17 in the north.