Tenby is only three miles away with its famous coloured houses round its picturesque harbour, ancient town walls and four blue flag beaches. From there you can take a boat to Caldey Island and its monastery.
Another Island further up the coast is Skomer Island, which is home to fulmars, razorbills, guillemots, kittiwakes, oystercatchers, choughs and possibly the largest colony of Manx shearwaters in the world. Puffins nest in burrows on the cliff-top and wander across the paths right up to your feet. The waters around Smoker are part of the Smoker Marine Nature Reserve, one of only three such reserves in the UK. From the cliff-top you can watch the dolphins, seals, common porpoises and if you are lucky, you may even catch sight of a basking shark. Spring and early summer are the best times to see the puffins as this is when they bring sand eels back to their young.
There are many other fine beaches along the coast including Little Haven, Broad Haven, Barafundle and Manorbier. Surfing and windsurfing are popular activities, especially at Freshwater West.
For scuba divers there are many wrecks and islands to explore. Dive Pembrokeshire, is based at Milford Haven.
If you like ancient buildings and history, then you'll be spoilt for choice, with Pembroke Castle, St David's Cathedral, Pentre Ifan prehistoric burial ground and Black Pool, Carew Castle and Manorbier castle. The bluestones of the Preseli Hills were transported to help construct Stonehenge, and there are countless other walks along rivers, estuaries, through woods and little valleys in a continuously varying rural landscape.
If you're travelling to Pembrokeshire along the M4 keen gardeners may want to drop into the National Botanic Gardens of Wales near Carmarthen or take a slight detour to the historical Aberglasney Gardens near Llandeilo only a few miles off the M4. In June the waterlilly filled lakes of the Bosherton Ponds are a glorious sight.