7 Chic Outfits To Wear To Afternoon Tea In London How to Dress for Afternoon High Tea: a Traveler's Guide What to wear to afternoon tea in London Wandermust Family Afternoon tea attire question my 16yo daughter and I are in London for 36 hours and not bringing much in the way of a clothing assortment, certainly not anything fancy. Does I get asked what the appropriate dress code is for afternoon tea and I always recommend smart casual at a minimum. Smart casual is polished and put together but comfortable. Wear neat, clean clothing What to wear to afternoon tea & high tea & the 1 thing not to wear!