What are some casual suits for men for a wedding?

Short answer

Casual wedding suits for men include linen or cotton blazers with matching trousers, unstructured jackets in navy or grey, and smart chinos worn with a shirt and loafers. The key is to match the formality of your venue and the couple's dress code.

Casual does not mean sloppy. Choose fabrics that breathe and look relaxed, such as linen, cotton or a light wool blend. A linen blazer paired with matching trousers works well for summer weddings, especially by the sea or in a garden. For cooler weather, an unstructured navy or grey jacket keeps things smart without feeling stiff.

You can also skip matching trousers and wear dark chinos with a crisp shirt and a knit tie. Loafers or clean leather shoes complete the look without needing polished black oxfords. Avoid jeans, trainers and t-shirts unless the couple has clearly said casual wear is welcome.

Consider these options:

A light grey or beige two-piece suit in a breathable fabric
A navy blazer with charcoal or cream trousers
A smart shirt, chinos and a waistcoat for a layered look
A patterned shirt with a plain jacket for subtle interest

Check the invitation for a dress code and ask the couple if you are unsure. Your comfort matters, but so does showing respect for the occasion. When in doubt, lean slightly smarter rather than too relaxed.