Best Watercolour Sets for Plein Air Painting (UK Guide)
A UK guide to the best watercolour sets for plein air, covering compact pocket boxes, student and artist-grade kits, and options for building a custom travel palette.
Key takeaways
- • Best all-round pick is the Winsor & Newton Cotman Field Plus for a self-contained field kit.
- • Prioritise mixing space and a secure lid over high pan counts for outdoor use.
- • Pocket and compact sets suit urban sketching and travel; artist-grade compacts suit serious outdoor work.
- • Daler-Rowney Aquafine is the best budget option; W&N Professional Compact is the step-up artist-grade choice.
- • Consider a Portable Painter Micro or Etchr palette to build a custom field set once you know your preferred pigments.
Watercolour is one of the most natural fits for outdoor painting: it's light, dries quickly, and you can be set up and painting in minutes with very little kit. The trouble is that not every watercolour set is designed with outdoor use in mind. Some are too bulky, some offer almost no room to mix, and some fall apart after a few outings in the field. This guide cuts through the options available in the UK and gives honest recommendations by budget and experience level, so you can find the best watercolour sets for plein air without wading through every set on the market.
What Makes a Watercolour Set Good for Outdoor Painting?
Before we get into specific picks, it helps to know what you're actually looking for. A set that works well in the studio can be frustrating outdoors, and a few key differences separate a genuinely field-worthy kit from one that will have you wishing you'd stayed home.
- Half pans vs tubes: Half pans are the default choice for plein air. They're compact, self-contained, and there are no lids to lose or tubes to squeeze and cap with paint-covered fingers. Tubes are better for large studio washes where you need a lot of colour fast. For field work, half pans win.
- Student grade vs artist grade: Student-grade sets (Cotman, Aquafine) use slightly different formulations with some pigment substitutes, but they're genuinely fine for outdoor studies and learning. Artist-grade paints offer stronger pigment load, better lightfastness, and richer colour, which matters if you're framing or selling work. Don't let anyone tell you student grade is a shameful choice for plein air.
- Palette design: Mixing space is often more important than colour count. Look for a lid that doubles as a palette, defined wells, and a secure closure that won't flick open when you're rummaging in your bag. A set with 12 pans and three generous mixing wells will usually serve you better than one with 24 pans and almost no room to work.
- Portability and accessories: A built-in travel brush and water bottle reduce what you need to carry separately. Metal tins are more durable than plastic for regular field use. If a set fits in a coat pocket, that's a genuine advantage when you're walking to a location.
A note on mixing space
The biggest frustration beginners have with compact sets is running out of room to mix. A palette with three or four generous wells will serve you better outdoors than one crammed with 24 tiny pans and almost no mixing area.
The Best Watercolour Sets for Plein Air Painting
Here are the sets we'd genuinely recommend, organised from best all-round pick to more specialist options.
Best All-Round Pick: Winsor & Newton Cotman Field Plus Box Set (12 Half Pans)
If you want one recommendation and nothing else, this is it. The Cotman Field Plus is specifically designed for outdoor use, and it shows in the details. It comes with an integrated water bottle that slots neatly into the box, two slide-out mixing palettes that give you a decent amount of working space, and a solid colour selection across 12 half pans. The Cotman range is reliable, widely available across UK suppliers including Jackson's and Cass Art, and sits at a price point that doesn't feel like a gamble.
The colour selection is sensible rather than exhaustive: you get warm and cool primaries, a couple of useful earth tones, and enough range to mix most of what you'll encounter outdoors. It's not the most inspiring range in the world, but it's a workable one.
The honest limitations: this is student-grade paint, so pigment intensity is lower than artist-grade alternatives, and the plastic casing is less robust than a metal tin. If you're rough with your kit, it'll show over time. But for most people picking this up to start painting outside, those trade-offs are irrelevant.
Best for: Beginners and intermediates who want a self-contained, purpose-built field kit they can grab and go. Approximate price: around £25 (prices correct at time of writing).
Jackson's
Winsor & Newton : Cotman : Field Plus Box Set : 12 Half Pans
A Compact And Versatile Cotman Watercolour Set For Painting En Plein Air. The Cotman Field Plus Is Among The Most Practical Sets On The Market And Features A Range Of 12 Half Pans, Palettes, And Other Features Integral To Painting Outdoors. The Case Acts As Both Storage And Palet
Best Compact Pick: Winsor & Newton Cotman Watercolour Paint Sets (Compact / Pocket Box Range)
If you're an urban painter, a regular traveller, or someone who wants a set that fits in a jacket pocket, the Cotman pocket box and sketchers' pocket variants are worth serious consideration. Covering 12 to 14 half pans depending on which variant you go for, these sets are genuinely slim, and the lid doubles as a mixing palette, keeping things simple and self-contained.
The colour quality is the same as the Field Plus (Cotman student grade), and the design philosophy is similar. What you're trading for that slim profile is mixing space: the palette area is noticeably more limited than the Field Plus, and if you're trying to work at any scale or with large washes, you'll feel the constraint. For quick colour notes, sketches, or situations where you're moving between spots frequently, though, it's an excellent tool.
These sets are widely available from UK suppliers and are often discounted at the smaller end of the range.
Best for: Urban sketchers, travellers, and anyone who wants a compact watercolour set for everyday carry. Approximate price: around £15 to £27 depending on variant (prices correct at time of writing).
Jackson's
Winsor & Newton : Cotman Watercolour Paint Sets
Winsor & Newton Cotman Watercolour Paint Sets Offer High Quality, Affordable Watercolours With Rich Pigmentation And Excellent Transparency. Designed For Students And Artists, These Sets Provide A Carefully Curated Selection Of Vibrant, Easy-to-blend Colours That Deliver Consiste
Best Budget Pick: Daler-Rowney Aquafine Mini Travel Watercolour Set
If you're not sure how much you'll use a set, or you're buying for someone just starting out, the Daler-Rowney Aquafine Mini Travel Set makes a strong case for itself at around £10. It's a named brand with a credible track record, the lid acts as a palette, and a travel brush is included so you're genuinely ready to paint.
The Aquafine range sits alongside Cotman in the student-grade category, and the pigment quality is serviceable. You'll notice the difference if you place it next to artist-grade colours, but for outdoor studies and learning to read colour outdoors, it more than does the job. The brush that comes with it is short and a little stiff, which can feel limiting if you're attempting anything larger than a postcard-sized study, but for quick sketches it's workable.
Best for: Budget-conscious beginners who want a named brand without spending much. Approximate price: around £10 (prices correct at time of writing).
Jackson's
Daler-Rowney : Aquafine Mini Travel Watercolour Paint Set : Half Pan : Set Of 10
The Daler-Rowney Aquafine Mini Travel Watercolour Paint Half Pan Set Of 10 Is Compact And Portable, Making It Easy To Store And Perfect For Outdoor Painting Or Travel. The Set Includes A Thumb Ring For Stability While Working, A Colour Mixing Area Inside The Lid, And An Aquafine
Best Step-Up Pick: Winsor & Newton Professional Watercolour Compact Set (14 Half Pans)
If you're past the stage of outdoor sketching for its own sake and producing work you want to exhibit, sell, or simply take more seriously, the Winsor & Newton Professional Watercolour Compact is the set to consider. This is artist-grade paint in a travel-friendly format: 14 half pans, a compact design built for field use, and the noticeably richer, more luminous colour that comes with genuine pigment loads and better lightfastness.
The jump in quality is real. You'll notice the difference in how the colours behave when you mix them, in the strength of washes, and over time in how the finished work holds up. What you won't necessarily notice immediately is whether it makes your paintings look better on day one; that's more about observation and practice than paint quality. But if you're ready to invest, this is a set you'll grow into rather than out of.
The honest trade-off: this is significantly more expensive than the student sets listed above. For a complete beginner, that cost isn't justified. For someone who's been painting outdoors for a while and wants their materials to keep pace with their development, it is.
Best for: Intermediate to experienced painters ready to work with artist-grade colour. Approximate price: around £61 (prices correct at time of writing).
Jackson's
Winsor & Newton : Professional Watercolour : Compact : Set of 14 Half Pans
Perfect For The Travelling Watercolourist, This Folding Plastic Palette Contains 14 Half Pans Of The Finest Professional Watercolours From Winsor & Newton And A Pocket-sized Sable Brush. Folded, It Measures Just 4¼in × 5¼in (11 Cm × 13.5 Cm). The Con
Best for Building a Custom Palette: Portable Painter Micro Travel Watercolour Palette
This one works differently from the sets above. The Portable Painter Micro is an empty palette vessel, not a pre-filled set. You fill it yourself using empty half pans and tube colours of your choice, building a personal field palette around the specific pigments you love.
It's a satisfying approach once you know your own preferences. Instead of working around someone else's colour choices, you start from scratch with the yellows, blues, and earth tones that suit the landscapes you actually paint. The Micro is compact and well-made, with a thoughtful layout that gives you decent mixing space for its size.
The honest limitation: this requires planning. You need to source empty half pans, fill them from tubes, let them dry properly, and think carefully about your colour selection. For a complete beginner who's still figuring out which colours they reach for most, this is too much to take on. Come back to it once you know what you're doing.
Best for: Painters who already have clear colour preferences and want a personal, optimised field palette. Approximate price: around £26 (prices correct at time of writing).
Jackson's
Portable Painter : Micro : Travel Watercolour Palette : White
The Portable Painter Micro Is A Portable Pocket-sized Palette For Watercolours. Excellent For Painting En Plein Air, The Palette Is A Credit Card Size And Approx. 1in Thick. It Quickly Opens Out Into A Versatile And Functional Watercolour Painting Palette. The Palette Has Six Emp
Worth Knowing About: Jackson's Watercolour Folding Set (58 Pans)
This one earns a mention rather than a full recommendation for outdoor use. At 58 pans, it's not a typical field set, and it won't fit in your bag the way the others do. What it offers is genuinely excellent mixing space and a comprehensive colour range in a folding format that, while too large for everyday plein air, is very capable at home or on a longer residency where you're working from a fixed base.
If you're the kind of painter who wants everything available and works from a table or a car rather than on foot to a remote location, this might suit you better than a compact set. But go in with clear expectations: it's a home-studio set with some travel potential, not a field set with a full colour range.
Best for: Painters who want a comprehensive base at home that can also travel for longer residencies. Approximate price: around £29 (prices correct at time of writing).
Jackson's
Watercolour Paint : Folding Set : 58 Pans
This Watercolour Paint Set Is Excellent For Students And Beginners Who Want An Introduction To Painting With Watercolours. This Set Contains 58 Watercolour Pans In A Unique Folding Layout. Features A Thumb Ring To Help When Holding The Palette And Painting En Plein Air.
How to Choose the Right Set for You
| Set | Grade | Best for | Approx. price |
|---|---|---|---|
| Cotman Field Plus Box (12 half pans) | Student | Beginners, all-in-one field kit | ~£25 |
| Cotman Compact / Pocket Box | Student | Urban sketching, everyday carry | ~£15–£27 |
| Aquafine Mini Travel Set | Student | Budget beginners | ~£10 |
| W&N Professional Compact (14 half pans) | Artist | Intermediate to experienced | ~£61 |
| Portable Painter Micro | N/A (empty palette) | Custom palette builders | ~£26 |
| Jackson's Folding Set (58 pans) | Student | Home studio with travel potential | ~£29 |
If you're just starting out, go with the Cotman Field Plus. It's affordable, designed specifically for field use, and includes the accessories you actually need. You won't outgrow it for a good while, and even if you do eventually upgrade, it'll still earn its place in your bag as a backup kit.
If portability is the priority, the pocket box format is the right call. It genuinely fits in a jacket pocket, which matters when you're already carrying a bag, a folding stool, and a water bottle to a location on foot. The limited mixing space is a fair trade for that convenience.
If you're ready to invest in artist-grade colour, the W&N Professional Compact is a meaningful step up. The improvement in pigment quality is noticeable and it's a set you'll be happy with for years. If you're still at the stage of learning to see colour outdoors, though, start with Cotman and save the investment for when it will genuinely make a difference.
If you want something personal and you already have colours you love, the Portable Painter Micro gives you the freedom to build a palette that reflects exactly how you paint. It's a more considered approach, and a satisfying one once you're ready for it.
A Few Things Worth Knowing Before You Buy
Mixing space is often the real limiting factor, not colour count. A 12-pan set with three generous wells will serve you much better outdoors than a 24-pan set with nowhere to mix. When you're comparing sets, look at the palette area as closely as you look at what's in the pans.
Most travel brushes that come with sets are serviceable but not great. They'll get you through a session, but if you find yourself frustrated with the brush rather than engaged with the painting, it's worth picking up a dedicated travel brush separately. A squirrel or synthetic travel brush with a protective cap is a useful addition to your kit, and you'll find options across UK suppliers from Ken Bromley to Cass Art.
Student-grade colours are genuinely fine for outdoor studies. They work well for the kind of quick, observational work that suits plein air painting. The time to think about upgrading is when you're producing work you want to frame, exhibit, or sell, not before. Lightfastness matters for permanent work; it matters much less for studies in a sketchbook.
A note on UK weather: in damp or cold conditions, watercolour takes longer to dry than you might expect. This isn't a problem with your set; it's a condition you'll learn to work with. Wet-in-wet effects become more forgiving, and you get longer to work into a wash. Knowing how to handle that, rather than fighting it, matters more than which set you're carrying.
What About Building Your Own Travel Palette?
Once you've been painting outdoors for a while, you might find that no pre-filled set is quite right: you love certain pigments, you always reach for the same colours, and you're carrying pans you never use. That's a natural point to think about building your own field palette.
The idea is straightforward: buy an empty folding palette or a dedicated micro palette, fill empty half pans with tube colours you already know and love, and you have a personal kit built around exactly how you paint. It takes a bit of preparation upfront, but painters who do it tend to stick with it because the result is so much more personal and practical.
The Portable Painter Micro is a solid choice for this. If you want something with more mixing wells, the Etchr Mini Palette offers 19 wells in a thoughtfully designed format, and the Etchr Pocket Palette is worth considering if you want something truly compact. It's worth also looking into the Van Gogh Watercolour Pocket Box (24 half pans), which sits in an interesting middle ground between student and artist quality and is available from UK suppliers including Ken Bromley; it's a strong option if you want more colour range without the full artist-grade price tag.
Start with a pre-filled set. Once you know what you love, building your own is a satisfying next step.
Palette options for building your own field kit
Portable Painter : Micro : Travel Watercolour Palette : White
Etchr : Pocket Palette
Etchr : Mini Palette : 19 Wells
There's no single perfect watercolour set for plein air. The best one is the one that fits in your bag, doesn't stress you out to use, and actually comes with you when you leave the house. Start with something inexpensive if you're not sure, get outside with it, and let your practice tell you what you need next. Watercolour rewards people who use it regularly far more than it rewards people who buy the most expensive kit.
FAQ
Frequently Asked Questions
Are half pans better than tubes for plein air painting?
Yes. Half pans are more portable, self-contained, and less messy, making them the preferred choice for field work. Tubes are better when you need large studio washes.
Should I buy student-grade or artist-grade paints for outdoor work?
Student-grade paints are fine for studies and learning outdoors. Upgrade to artist-grade when you want richer pigment, better lightfastness, and work you plan to frame or sell.
How important is palette mixing space in a travel set?
Very important. Generous mixing wells matter more than a high pan count for plein air. A 12-pan set with three or four good mixing wells usually beats a 24-pan set with almost no palette area.
Do travel brushes included with sets work well?
They are usually serviceable but not excellent. If the included brush frustrates you, buy a dedicated travel brush with a protective cap made from squirrel or synthetic hair.
When should I build a custom travel palette?
Build a custom palette once you know which colours you reach for most. Empty micro palettes let you fill half pans from tubes and create a compact, highly personal field kit.
Author
PleinAirPainting Editorial Team
PleinAirPainting.co.uk helps artists paint outdoors with confidence through UK-focused guides, equipment advice, resources and plein air inspiration.
