Women’s Swim Board Shorts: How to Choose a Comfortable, Practical Pair for UK Swimming

Women’s swim board shorts can offer more coverage and storage than a conventional swimming brief, but product pages do not always make the important details easy to compare. A pair may look suitable for the beach yet feel restrictive in the pool, while a high-waisted design can fit well at the waist but ride up during paddleboarding or active swimming.

Before buying, look beyond colour and promotional wording. Check the UPF rating, liner construction, pocket design, waistband, inseam length and size availability. These details have a greater effect on day-to-day use than styling alone.

Common buying pitfalls to avoid

1. Treating UPF as complete sun protection

UPF 50+ swim shorts indicate a high level of ultraviolet protection through the tested fabric area. They do not protect uncovered legs, stomach, arms or shoulders. You will still need suitable clothing, shade and sunscreen for exposed skin, particularly during long beach days or outdoor water activities.

Also check whether the UPF description applies to the actual shorts fabric rather than a general range claim. Product listings should clearly identify the rating and garment coverage.

2. Assuming every built-in liner provides the same coverage

“Liner” can refer to different constructions, including brief-style or short-style inner layers. A liner may improve coverage and reduce the need for separate swimwear, but the fit depends on its cut, fabric stretch and leg openings.

For women’s swimming shorts with liner, check the size chart and product images carefully. If you plan to swim lengths, kayak or take part in water sports, look for a liner that sits securely without digging into the skin.

3. Choosing the wrong inseam for your activity

A shorter leg can feel less restrictive around the pool, whereas a longer leg offers more coverage for beach activities, walking and board sports. However, inseam measurements are not universal, so compare the stated length rather than relying on labels such as “short” or “long”.

The difference between 5-inch swim shorts and 7-inch swim shorts is noticeable: five inches generally gives a lighter, shorter silhouette, while seven inches provides additional thigh coverage.

Core specifications to check

UPF 50+ rating and fabric coverage

If sun coverage is a priority, look for a clearly stated UPF 50+ specification. UPF measures how much ultraviolet radiation passes through the fabric, but it does not replace other sun-safety measures. The fabric should also be suitable for repeated contact with water and should follow the care instructions to help preserve its shape and finish.

Waistband construction

High-waisted swimming shorts sit higher on the torso than standard swim shorts. This can provide a more covered feel and may work well with tankinis, rash vests and swim tops. Before purchasing, compare your waist and hip measurements with the seller’s size chart. Do not assume that a familiar UK clothing size will fit identically across swimwear brands.

A drawstring, elasticated waist or wide waistband can affect how securely the shorts stay in place. Details should be confirmed from the listing or images rather than assumed.

Liner, pockets and inseam

For practical everyday use, prioritise three features:

• Built-in liner: useful for added coverage, but check its shape and leg length.
• Pockets: convenient for small essentials when walking beside the pool or beach; they may not be designed for heavy items or prolonged swimming.
• 5-inch or 7-inch inseam: select according to your preferred coverage and activity.

Pockets can also create drag in the water if filled, so remove keys, phones and other items before swimming. For pool sessions, a secure locker remains more suitable for valuables.

Our Top Recommendations by shopper profile

MATCH FOR: Budget-Conscious Starters

Willit Women's Swim Board Shorts UPF 50+ High Waisted Swimming Shorts with Liner Pockets 5" Black Size 40

Why This Fits Their Persona: This black pair brings together the main features many first-time buyers look for: a high waist, UPF 50+, a liner, pockets and a 5-inch leg. The neutral colour can be paired with a range of swim tops for pool or holiday use.

How It Avoids the Trap

The listing states the UPF 50+, high-waisted, liner and pocket details, while the 5-inch inseam is specified rather than left to interpretation.

Key Advantage & Pros

Listed in black with a 5-inch inseam; includes a built-in liner, pockets and a stated UPF 50+ rating.

MATCH FOR: Premium Quality Seekers

Willit Women's 7" Swim Board Shorts UPF 50+ High Waisted Swimming Shorts with Liner Pockets Navy Size 40

Why This Fits Their Persona: Shoppers wanting more leg coverage can consider this navy option with a 7-inch inseam. It is suited to holidays, coastal walks and water activities where a longer short may feel preferable.

How It Avoids the Trap

The stated 7-inch length makes the coverage choice clearer than relying on product photographs, and the listing specifies the liner and pockets.

Key Advantage & Pros

Navy colour, 7-inch inseam, high-waisted cut, built-in liner, pockets and stated UPF 50+ specification.

MATCH FOR: Specific Use Case/Heavy Users

Willit Women's 7" Swim Board Shorts UPF 50+ High Waisted Swimming Shorts with Liner Pockets Black Size 50

Why This Fits Their Persona: This extended-size option is listed in size 50 and has a longer 7-inch leg. It may suit shoppers prioritising more coverage for active beach days, outdoor swimming or water-sports clothing.

How It Avoids the Trap

The specific size, inseam and feature list are visible before purchase, helping shoppers avoid selecting a generic size or assuming that all shorts offer the same coverage.

Key Advantage & Pros

Listed as size 50 in black; includes a 7-inch inseam, high waist, liner, pockets and stated UPF 50+ rating.

Sizing and care checks before ordering

Use the product’s own measurement chart, taking measurements over light clothing or swimwear. Compare waist and hip measurements, not just the number printed on a previous pair. If you are between sizes, consider how much stretch and coverage you want, while avoiding an overly loose waistband that may move in the water.

After swimming, rinse the shorts in clean water to remove chlorine, salt and sand. Follow the care label, avoid harsh bleach unless specifically permitted, and allow the garment to dry as directed. Heat and strong detergents can affect elastic fibres over time. Inspect the liner, seams and waistband periodically, especially if the shorts are used frequently.

Frequently asked questions

Are women’s swim board shorts suitable for swimming pools?

Yes, provided the material and care instructions are suitable for swimwear. Check the pool’s clothing rules, as some facilities may require close-fitting swimwear or restrict loose outer layers. Remove pocket contents before entering the water.

How long should swim board shorts last?

Lifespan depends on chlorine exposure, salt water, washing habits, sun exposure and frequency of use. Rinsing after each swim and following the care label can help preserve the fabric and elastic. Replace a pair when the waistband no longer stays secure, the liner becomes damaged or the fabric shows significant thinning.

Should I choose 5-inch or 7-inch swim shorts?

Choose 5-inch swim shorts for a shorter leg and less coverage, particularly for casual pool use. Choose 7-inch swim shorts if you prefer more thigh coverage for beach activities, paddleboarding or outdoor water sports. Always confirm the inseam and size chart on the individual listing.