Plein Air Painting Essentials: What to Pack for Outdoor Watercolour Sessions

Plein Air Painting Essentials for Watercolour Artists

Plein air painting — painting outdoors, directly from life — is one of the most rewarding ways to develop as an artist. The light changes, the scene is alive, and every session teaches you something new. But heading out unprepared can turn a beautiful afternoon into a frustrating one. Here's what to pack.

1. A Compact Watercolour Set

Your studio palette stays at home. For plein air work, you want a compact tin or travel palette that fits in a bag or jacket pocket. Half pan sets are the standard choice — they're lightweight, self-contained, and most include a built-in mixing area. Aim for a set with a balanced selection of warm and cool primaries plus a few earth tones. You can mix everything else.

Browse our watercolour sets and kits to find a travel-friendly option.

2. A Quality Sketchbook or Watercolour Paper Pad

Paper matters enormously outdoors. Thin, low-quality paper will buckle and warp the moment it gets wet, making it nearly impossible to work. Look for a spiral-bound watercolour pad or a hardback sketchbook with at least 300gsm cold-pressed paper. The stiff backing means you don't need a separate board.

3. A Small Selection of Brushes

You don't need many brushes for plein air work. A round size 10 or 12 for large washes, a round size 6 for mid-detail, and a rigger or liner for fine lines will cover almost any subject. Travel brushes with protective caps or a compact brush roll keep them safe in your bag.

4. Water and a Portable Palette

Water is the one thing you can't forget. A collapsible silicone water cup takes up almost no space and is far more practical than a glass jar. If you're painting somewhere without a water source, bring a small bottle of clean water. Some travel palettes include a built-in water reservoir — a useful feature worth looking for.

5. A Viewfinder or Thumbnail Sketching Habit

One of the biggest challenges of plein air painting is composition — the world doesn't come pre-framed. A simple card viewfinder (a rectangle cut from a piece of card) helps you isolate a scene before you commit to painting it. Alternatively, spend two minutes doing a small thumbnail sketch to work out your composition first.

6. Practical Extras

• Masking tape to secure paper to a board or create clean edges
• A pencil and eraser for light underdrawing
• Paper towel or a cloth for blotting and brush wiping
• A hat and sunscreen — you'll be outside longer than you think
• A small folding stool if you prefer to sit while painting

Keep It Light

The golden rule of plein air painting is to take less than you think you need. The more you carry, the less you paint. Start with a minimal kit, learn what you actually reach for, and refine from there.

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