Overview
Space is limited aboard a charter yacht — each cabin typically has one large locker and minimal shelf space. The golden rule: bring a soft holdall (not a rigid suitcase — it stores flat in a locker), and pack for conditions you'll actually encounter.

Clothing
Deck shoes (non-slip, white or non-marking sole) are essential and yacht-only. Bring a waterproof jacket even in summer. A fleece or mid-layer for evenings. Light, quick-dry shorts and shirts for days. Smart-casual clothes for harbour restaurants.
Safety & sun
High-SPF sunscreen in quantity. Polarised sunglasses. A hat with a brim. Seasickness tablets — take them before you feel ill; they're largely ineffective once nausea sets in. The best prophylactic is a skin patch (Scopolamine) applied 4+ hours before departure.
Electronics
A waterproof phone case is essential. A portable power bank. A tablet with Navionics installed is a valuable backup to the chart plotter.
What not to bring
Hard suitcases. High heels. Aerosol cans. Heavy books — download them instead.