July - December

Wales moves into the high season in July. Llandudno, Wales`s most popular seaside resort, is best to visit during this time, but be warned that thousands of other people are thinking the exact same thing, especially as the summer term for grade school lets out in the middle of July. Crowds will be at their peak at attractions across the country, and all attractions in Wales will have opened for business by July.

There are low rain chances across Wales in July, but the chances of rain go up and up until September, when you will see the most rain and the highest chances for overcast days. This will continue through at least November. September-November is a shoulder season, meaning accommodations will be priced less, but consider the overcast weather and the fact that many accommodations and amenities will be closing toward the end of summer and into September and October.

Snow is a slight concern beginning in the month of November; major snow events are possible, but unlikely. Wales is infamous for its December gales, however, and the right amount of moisture could turn snowy very quickly.

Temperatures peak in the 60s throughout July and August over much of Wales, with some locales reaching the 70s or even 80 degrees. Very rarely does the temperature rise above 85 even on Wales`s hottest days. Lows are comfortable, typically in the 50s. Temperatures retreat after September, with much of Wales reaching the 50s by October and 40s for highs by December. Inland locales will get colder quicker, usually in the 40s by November.

Holidays and festivals:

July: Wales Air Show, Swansea Bay

July: International Eisteddfod, Llangollen (an official celebration of Welsh folk culture, with dancing)

July: International Snowdon Race (a race to the top of Mount Snowdon and back down again, 10 miles in total)

August: Conwy River Festival, Conwy, with boat racing and social events

August: Brecon Jazz Festival, a popular music festival that has hosted jazz greats since 1984.

August: Green Man Festival, Brecon Beacons National Park (independent music and arts festival)

August (meant to coincide with the weekend before the Summer Bank Holiday): Pride Cymru, Cardiff (LGBT+ pride parade, the largest in Wales)

Last Monday in August: Summer Bank Holiday (national holiday in Wales, expect widespread closures)

Last Monday in August: World Bog Snorkelling Championship, Llanwrtyd Wells (snorkeling race through a peat bog)

Mid-September: Abergavenny Food Festival (one of the largest and most prestigious food festivals in Wales)

October: Iris Prize LGBT+ Film Festival, Cardiff

Late October: Conwy Feast (a celebration of food, music, and art in Conwy including a light show projected onto Conwy Castle)

November–January: Cardiff's Winter Wonderland, a little Christmas village in Cardiff that includes food, drink, amusement rides, and ice skating.

November 5: Guy Fawkes Night (fireworks, bonfires, similar to observances in England)

November 11: Remembrance Day (people wear poppies on lapels and two minutes of silence are publicly observed at 11 a.m.)

Early December: Caerphilly Christmas Market

December 25–26 (observed on December 27-28 if on a weekend): Christmas and Boxing Day (national holiday in Wales, expect widespread closures)

December 31: New Year's Eve, with massive celebrations across the country, with the biggest in Cardiff and the most unique in Fishguard and Llanwyrtd Wells.