Derek Brockway explores some of the less familiar stretches of the Welsh coastline. This episode sees him in the dramatic landscape of the north Gower saltmarshes, where he learns of the magical and mystical fairy folk, helps a sheep farmer round up his flock, and even has a go at weaving. Meanwhile, marine biologist Lizzie Daly is tracking trout and Matt Bassett rides the waves on a new ‘adaptive’ surfboard at Caswell Bay.

Derek gets wet – from rain, an overturned kayak in the sea… and a hot tub with a view! Walking the Pembrokeshire coast from Newport to Fishguard, the weatherman also learns how the last invasion of Britain was foiled by a feisty woman. Archaeologist Dr Erin Lloyd Jones explores the link between Stonehenge and the Preseli mountains, and party planner Onkar Singh Purewal visits a ’Hansel and Gretel’ house, covered in shells.

Is that James Bond or weatherman Derek Brockway on the jet ski? On this stunning walk from Porth Neigwl to Abersoch on the LLyn peninsula, Derek samples the jet set life and local honey, which he describes as ‘blasus Iawn’ – delicious! He’s not the only one brushing up his Welsh, comedian Kiri Pritchard McLean goes back to school at Nant Gwyrtheyrn while Mo Jannah explores the mystery of an African longboat in a Welsh museum.

Weatherman Derek Brockway visits south Wales and discovers a walk of contrasts that includes a beach, a canal and a bustling marina. On the way he learns about ‘Wales’s Tarantula’ and narrowly avoids crashing a luxury boat. Wildlife expert Lizzie Daly goes on a bat hunt while party planner Onkar Singh Purewal organises a tea-party in a ghost village.

Derek the Weather has rain, wind and even a little bit of sun when he takes the circular route around the Great Orme. He braves the elements – and his nerves – to abseil down a section of the massive rock. Mo Jannah tries his hand at mussel fishing the traditional way, and Dr Erin Lloyd-Jones explores the history of Llandudno Pier, meeting the designer’s great, great grandson.

Barry-boy ‘Derek the Weather’ is on familiar ground when he starts his walk at Porthkerry, next to his home town. On his way to Llantwit Major he drops in for tea at “Font-y-Carlo” caravan park, visits one of Wales’ oldest pubs and tries his hand at stone-stacking on a pebble beach. Comedian Kiri Pritchard-McLean takes a nostalgic trip to Barry Lido and Mo Jannah explores the stories of the African sailors who made south Wales their home.

The final episode in the series, and Derek Brockway, the Weatherman, veers off the Wales Coast Path to walk along a section of the stunning Mawddach Trail near Barmouth. He takes an early morning canoe trip and hears a story of incredible bravery. On this walk he also visits the village of Fairbourne, and takes a ride on its special small-scale train. Archaeologist Dr Erin Lloyd-Jones goes in search of local gold and Matt Bassett goes star-gazing… but is defeated by the Welsh weather.