Boys Wedding Guest Outfits for Summer 2025: Style Guide & Tips

Wedding season is finally here. And if your kids have received an invitation, you might feel like you can't waste any time selecting their attire. Summer weddings are a joyous time of the year where both parents and children look forward to celebrating. However, it can get tricky to select a wedding guest outfit for boys that possesses charm, comfort, and style. 

However, do not stress yet! Today, we’ve put together a style guide covering everything from the summer wedding dress code to outfit ideas. The goal is to help you navigate how to dress boys for a wedding. So buckle in, and let’s get started. 

Cracking the Wedding Dress Code: What It Means for Boys

Whether your boy is a guest or part of the wedding party, it’s essential to understand the wedding's dress code.

Formal Wedding Dress Code

A formal wedding affair is likely to be an evening event, which typically means sticking to darker colours such as charcoal grey, navy, or black when picking out your little lad’s formal wedding guest suit. The outfit is completed with either black or dark brown dress shoes, a white wedding dress shirt, and a tie or bow tie. Accessories like cufflinks are optional but provide an air of formality. 

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Semi-Formal Wedding Dress Code

Also known as "cocktail attire", semi-formal is the second most common wedding dress code after formal. It is especially popular in the summer for its versatile nature, as it is suitable for both daytime and evening nuptials. 

You’ll want to dress him somewhere in between formal and dressy casual for a summer cocktail wedding. Opt for light colours and breathable fabrics for daytime affairs and darker, more formal colours for evening events. It’s a step below formal but still elegant, so a boys’ 3-piece suit is a must. However, a tie could be skipped if the setting is more relaxed.

Light colours such as beige, light grey, or navy are popular, and alternative colours such as dusty blue, pastels, or sage green are acceptable (and even trendy this summer). The outfit is completed either with dress shoes, slip-on loafers, or leather oxford shoes.

Dressy Casual Wedding Dress Code

This dress code allows for your little gentleman’s personality to shine through while remaining polished. If your boy is old enough, it’s a good idea to get him involved in the process of clothes selection, as this dress code offers more leniency with colours and styles.

Nevertheless, it’s best to skip the denim, shorts, and t-shirts, as they are considered inappropriate for such an occasion. You can assume this dress code calls for something similar to smart-casual—think tailored blazer with chinos or dress trousers.

A button-down shirt in a breathable fabric such as cotton or linen is also popular. As for footwear, slip-on loafers and derby shoes, either in leather or suede, complete the look.

Beach Wedding Dress Code

Receiving an invitation to a destination wedding feels a lot like being invited on a vacation. Beach weddings are fun and embody the best aspects of summer: lightweight, breezy fabrics, light colours, and wedding shorts suits.

Just because a beach wedding entails lots of sun and sand doesn’t mean that a guest can get away with wearing a t-shirt and sandals. The outfit should still reflect that it is a dressy occasion. For instance, dressing in summer chic or dressy casual attire is a safe and stylish choice for a garden party or beach wedding.

A boys beach wedding outfit looks like a cotton-linen blend shirt or short-sleeve button-up in light shades like sand, sage green, or sky blue. Sirri’s linen shirts pair beautifully with chinos or tailored shorts, giving him a polished look that’s still cool and comfortable. For slightly more formal beachfront events, a boys’ wedding waistcoat shorts suit set in cream, beige, light blue, or navy is a stylish win. Ditch the heavy leather shoes and opt for smart loafers. Just avoid sporty trainers; they’ll clash with the vibe (and might fill with sand!). Complete the outfit with a light bow tie or suspenders for a charming twist.

Unspecified Dress Code: What to Wear to a Summer Wedding

If neither the wedding invitation nor the wedding party specified a dress code, it’s safe to consider the venue and time of day. Your best bet is cocktail attire, as it works for most summer weddings—daytime or evening affairs. 

You could also start a text chain among other parents attending the wedding and ask them what they’ll be selecting for their kids. It doesn’t have to be an exact replica, but it’ll help you draw inspiration from the colour palette or style. 

If you’re still unsure, googling the venue ahead of time helps to narrow down your options easily. 

If your little one happens to be a pageboy, it’s always a good idea to speak to the wedding party first, as they may be looking to work within a specific colour palette or match the boys entirely with the groomsmen. At Sirri, we offer a full range of matching wedding suits for father and son, a collection that includes everything you need, from matching suits and blazers to shoes and accessories. 

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Looking for more tips on how to dress for a summer wedding? Check out our men’s wedding guest guide.

Summer Wedding Guest Outfits for Boys: From Infants to Teens

Infants (0–12 months)

Babies should stay cool and cosy while still looking dressed up.

• Lightweight cotton rompers with suspenders or bowties
• Mini waistcoat sets over short-sleeved bodysuits
• Breathable, soft-soled dress shoes or prewalker shoes
• Optional: matching sun hat or baker boy cap for outdoor ceremonies

Baby & Boys 4-Piece Cotton Patterned Gentleman Outfit Set - KELEBEK - GREEN & NAVY

GBP 22.97

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Baby Boys’ Cotton-Linen 3-Piece Pinstripe Suit - SALAS - Ivory

GBP 29.97

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Unisex Kids Patent Leather Brogue Ankle Boots - QUINN - Navy Blue

GBP 29.99

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Baby Boys Genuine Leather Pre-walker Crib Shoes - Patik - Tan Brown

GBP 7.99

GBP 17.99

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Toddlers (1–3 Years)

At this age, style meets movement. Go for smart outfits with comfort in mind.

• 4-piece gentleman outfit suspender pants sets
• Waistcoats or blazers for formal touches
• Loafers or flexible moccasins

Baby & Boys 4-Piece Cotton Patterned Gentleman Outfit Set – KELEBEK - Light Blue - Navy

GBP 22.97

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Baby & Boys 4-Piece Cotton-Linen Waistcoat Shorts Suit Set - Red

GBP 9.99

GBP 44.99

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Boys Leather Penny Loafer - HUGO - Navy Blue

GBP 28.99

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Boys Platform Suede Moccasin Loafers with Tassels - Urban - Beige

GBP 13.97

GBP 31.99

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Young Boys (4–9 Years)

This age group can pull off more structure while still needing breathability.

• Lightweight double-breasted suits
• Clip-on braces or suspenders for a trendy touch
• Loafers, brogues, or stylish sneakers (depending on dress code)

Boys’ 3-Piece Pinstripe Double-Breasted Suit - Cream & Beige

GBP 59.97

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Boys' Casual Derby-style Sneakers - FELIX - Tan Brown

GBP 24.99

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Boys 5-Piece Formal Prom Suit with Double Breasted Waistcoat - Grey

GBP 59.97

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Boys’ Patent Slip On Tassel Loafer Shoes - Portland - Black

GBP 23.99

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Baby & Boys Double Breasted Floral Waistcoat Suit Set - Multicolour

GBP 42.99

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Boys’ Patent Slip On Tassel Loafer Shoes - Montana - Navy Blue

GBP 23.99

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Pre-Teens (10–13 Years)

Pre-teens want to look a bit grown-up—strike a balance between youthful and polished.

• Tailored chino shorts or trousers collared dress shirts
• Light summer blazers or waistcoats for formality
• Slip-on loafers or derby shoes for a sleek finish
• Subtle patterns like pinstripes or florals for added flair

Boys Cotton Linen Pinstrip Waistcoat Suit Set - Navy Blue

GBP 16.99

GBP 39.99

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Boys’ 7-Piece Self-Patterned Formal Suit Set - Planet - Beige

GBP 47.97

GBP 59.97

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Boys’ 2-Piece Twill Formal Suit - Dean - Blue

GBP 62.00

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Boys Slim Fit Classic Cotton Blend Shirt - White

GBP 12.99

GBP 17.99

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Boys Cotton Linen Pinstrip Waistcoat Suit Set - Khaki Green

GBP 22.99

GBP 39.99

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Boys’ 6-Piece Formal Ottoman Suit with Mandarin Collar - Grey

GBP 54.99

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Boys Slip on Tassel Penny Loafer - ATHENS - White

GBP 20.97

GBP 31.99

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Boys Patent Navy Derby Shoes - OHIO - Navy

GBP 23.99

GBP 29.99

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Teenagers (14–19 Years)

Teens often want to express personality—let them while staying wedding-appropriate.

• Slim-fit suits in light colours like grey, sand, or dusty pink or blue – we've included boys and adult sizes
• Open-collar shirts or fine-weave cotton ties
• Leather loafers or brogues with invisible socks
• Accessories: pocket squares, slim watches, or textured belts

Boys Slim Fit Textured 8-Piece Formal Suit Set - Lilac

GBP 54.99

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Boys’ Paisley Slim Tie & Pocket Square Set - Pink and Black

GBP 7.99

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Boys’ 3-Piece Slim Fit Textured Formal Suit - Tropez - Sky Blue

GBP 139.99

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Men’s 3-Piece Slim Fit Textured Formal Suit - Tropez Sky Blue - Sky Blue

GBP 274.97

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Boys’ Paisley Slim Tie & Pocket Square Set - Blue and Silver

GBP 7.99

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Boys 5-Piece Formal Prom Suit with Double Breasted Waistcoat - Beige

GBP 59.97

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Premium Slim Fit Boys Suit – MALIBU - Grey

GBP 124.99

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Premium Slim Fit Men's Suit Jacket – MALIBU - Grey

GBP 119.99

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Boys Mixed Pattern Formal Tie & Hankie Set - Blue Diamond

GBP 3.99

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Boys Lace Up Patent Derby Shoes - Brown

GBP 14.99

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Boys Platform Suede Moccasin Loafers with Tassels - Urban - Black

GBP 10.97

GBP 31.99

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Boys’ Patent Platform Derby Shoes - Nexa - Navy

GBP 10.97

GBP 31.99

Buy now

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Stay Cool in Style: Best Fabrics for Boys Summer Wedding Attire

Selecting both a summer- and wedding-appropriate fabric can make all the difference in ensuring your little one stays fresh and happy throughout the occasion. Here’s a breakdown of what you need to know when it comes to your child’s summer suiting. 

• Cotton: Known for its breathability, it is a staple in summer wardrobes. It allows air to circulate around the body, preventing overheating. Look for cotton dress shirts and 2-piece shorts suits that offer both comfort and style for smart and semi-formal occasions.
• Linen: Ideal for warm climates, linen is another excellent choice for summer wedding suits. It absorbs moisture quickly and dries fast, making it perfect for humid beach days. Linen suits, shirts, and trousers are not only practical but also bring forth a touch of effortless glam to any outfit, making them ideal for boys' wedding formalwear.
• Moisture-Wicking Fabric Blends: For boys who love to move around—especially during long-hour events—consider clothing made from moisture-wicking fabrics like polyester blends. These fabrics pull sweat away from the skin, keeping active kids cool, dry, and comfortable.
• Breathable Knits: In addition to traditional woven fabrics, lightweight and breathable knits like boys tweed blazers can provide structure without overlooking comfort. Tops made from these materials allow for ease of movement and ventilation, which is ideal for energetic kids during the summer.

Choosing a boys’ wedding suit made from these breathable fabrics ensures they’re able to enjoy their summer wedding and formal events without feeling overheated or stuffy in their clothes.

Wedding Style Rules: Do’s and Don’ts for Dressing Boys

Dressing your little one for a wedding can feel like a mission, especially when comfort, weather, and “will-he-actually-wear-this?” all come into play. Here's a helpful breakdown of do’s and don’ts to take the stress out of the process, and help your boy look (and feel) his best for the big day.

Summer Wedding Do’s

• Do choose breathable, lightweight fabrics: Kids get warm fast—especially during an outdoor or summer wedding. Look for cotton or linen-blend shirts and unlined blazers that keep things cool and comfortable. Tip: hold the fabric up to the light—if it filters through, it’s likely breathable.
  
  
• Do stick to the dress code, but make it age-appropriate: If the invite says semi-formal, you don’t need to reach for a tux. A smart shirt with a waistcoat or suspenders will often do the trick. Tip: check what the adults are wearing, then scale it down for kids.
  
  
• Do make sure it fits properly: Too-tight collars or dragging trouser hems can ruin the look and the day. Try everything a few days in advance to leave time for any tweaks or exchanges.
  
  
• Do involve your child in outfit choices: Give them two or three options to pick from, especially when it comes to colour or accessories. A little choice goes a long way in avoiding morning meltdowns.
  
  
• Do go for comfy footwear: Formal shoes don’t have to mean blisters. Slip-on loafers or soft-soled brogues look sharp without the complaints. Break them in a bit at home beforehand.
  
  

Summer Wedding Don’ts

• Don’t overdress for the season: That adorable three-piece velvet suit? Maybe save it for winter. For a summer wedding, lighter layers win. A crisp shirt and smart trousers are often enough.
  
  
• Don’t forget about play and movement: Remember, boys will run, dance, and crawl under tables (sometimes even all before the cake is cut). Make sure the outfit moves with them, not against them.
  
  
• Don’t clash colours or go too bold: Bright neons or cartoon ties might sound cute, but they can be distracting in photos. Stick to soft, timeless tones. Navy, beige, or pastels are always a safe, timeless choice.
  
  
• Don’t leave dressing to the last minute: Mornings can be hectic. Lay out the outfit the night before, down to socks and accessories. Bonus tip: pack an extra shirt just in case of surprise spills.
  
  
• Don’t stress the small stuff: A slightly untucked shirt or scuffed shoe isn’t the end of the world. As long as your little boy is comfortable, having fun, and not disrupting the event, the minor details can be ignored.
  

Accessories and Shoes for Boys Summer Wedding Outfits

The suit might be the star, but the accessories and shoes are what tie it all together. These final touches help your little one look polished, charming, and event-ready (without stealing the spotlight).

Accessories are the perfect way to introduce a little personality into your boy’s outfit. A bow tie in a soft pastel or a fun print adds a pop of colour and charm. For more formal settings, stick to classic shades like navy or grey, while daytime or beach weddings allow for light blues, soft yellows, or sage green. Pocket squares are optional, but they’re a sweet touch that echoes the grown-up look in a playful way.

The best shoes for boys' weddings are ones they’ll actually wear. Think loafers and brogues, even for beach or garden weddings. Avoid anything too stiff or slippery—comfort matters just as much as style. Go for boys’ wedding shoes in shades like tan brown, navy, or dark brown for maximum mix-and-match potential.

Find the Perfect Look: Shop Summer Wedding Outfits for Boys

Feeling confident and comfortable is what really matters, and Sirri makes it easy this summer wedding season.

Whether he's a little page boy or a growing teen, our 2025 summer wedding collection has what you need from:

• Lightweight waistcoat suit sets – perfect for daytime and beach weddings. 
• Patterned suspender trousers suits – perfect gentleman outfit for laid‑back outdoor celebrations and ring bearers.
• Three-piece slim-fit wedding tuxedos – ideal for evening or formal events that demand a statement touch 

No matter the dress code—from garden ceremony to evening reception—Sirri’s curated options make it easy to build a stylish outfit that’s as comfortable as it is charming. Shop our boys’ summer wedding guest outfits today and dress your little one in pieces that feel tailor-made for celebration. Let them walk down the aisle looking sharp and feeling comfortable.