Quick answer
You need a waterproof jacket, waterproof trousers, grip gloves, and S3 boots minimum. The UK averages 159 rain days a year. Your employer must provide suitable PPE where a risk assessment shows it's needed.
If you work near traffic, add EN ISO 20471 hi-vis to that list. Read on for exactly what to look for on the label.
Can you legally be made to work in the rain?
Yes. There's no UK law that bans working in the rain. Work can and does go on in wet conditions every day.
What the law does say is this. Under the Personal Protective Equipment at Work Regulations 1992, employers must provide suitable PPE where a risk assessment shows it is needed. Waterproof clothing counts as PPE when adverse weather poses a genuine health or safety risk. Regulation 11 of the Workplace (Health, Safety and Welfare) Regulations 1992 also states that outdoor workstations must, so far as is reasonably practicable, protect workers from adverse weather.
In short: you can work in the rain. Your employer can't send you out unprepared.
Why wet weather is a real safety risk
Rain isn't just uncomfortable. It's a genuine hazard.
Cold and wet together cause cold stress. The HSE flags this clearly. Symptoms start as a cough or body aches. Left unchecked, cold stress leads to chilblains, then hypothermia. Wet conditions strip heat from the body far faster than dry cold alone.
Wet ground kills grip. Slips and trips are the most common cause of workplace injury in the UK. A puddle on a flat surface is enough.
Wet hands drop tools. A glove that's soaked through loses grip fast. That's a dropped load, a cut hand, or worse.
Rain also cuts visibility. If your workers are near vehicles or plant, low-light rain conditions are when accidents happen.
What does EN 343 mean on a waterproof jacket?
BS EN 343:2019 is the British and European standard for rain protection clothing. If a jacket carries this mark, it's been independently tested. If it doesn't, it hasn't.
The label shows two numbers: X:Y.
- X = water penetration resistance (Class 1–4). How much pressure the fabric withstands before water gets through. Class 4 is the highest — tested at 20,000 pascals of pressure after washing, flexing, and abrasion. Class 1 is the lowest — tested new only.
- Y = breathability (Class 1–4). How well moisture vapour (sweat) escapes. Class 4 = most breathable. Class 1 = not classified as breathable.
A jacket rated EN 343 3:3 keeps out heavy, sustained rain. It lets sweat out so you don't overheat. That's what you want for a full shift outdoors.
A jacket rated EN 343 1:1 handles light drizzle for a short time. It will let you down in heavy rain.
Taped seams matter. Stitching holes leak. A proper waterproof jacket has taped or welded seams. Check for this before buying.
"Water-resistant" is not the same as "waterproof". A water-resistant jacket beads water off when new. It soaks through under sustained rain or pressure. Only EN 343-rated garments are tested and certified.
Many waterproof jackets also carry EN ISO 20471 for hi-vis. That means one garment covers both rain protection and visibility. For a deep dive into hi-vis classes and jacket options, see our Complete Guide to Waterproof Hi-Vis Jackets.
Portwest DX4 Rain Jacket Waterproof Stretch EN 343 Class 4:4 Work Coat
Do you need waterproof trousers too?
Yes. A jacket alone won't do it.
If you kneel, crouch, or work in standing water, your legs get soaked. Wet trousers against cold skin pull heat away fast. And a soaked worker is a distracted worker.
Look for trousers rated to EN 343 — the same standard as the jacket. If your workers are near traffic or plant, look for hi-vis waterproof trousers that combine EN 343 and EN ISO 20471.
Portwest PW342 Hi-Vis Rain Trousers Waterproof Breathable Work Trousers
Waterproof gloves: what to look for
Wet hands are one of the biggest overlooked risks in rain work.
Heat leaves wet hands very fast. Cold hands lose grip strength. Dropped tools and poor grip cause accidents. A good waterproof glove fixes both problems.
Look for the EN 511 standard. This tests gloves for cold and water protection. The marking shows three numbers:
- First number: protection from the cold air (cold wind, open weather). Scored 0–4.
- Second number: protection from contact cold (holding a cold tool). Scored 0–4.
- Third number: waterproofness. 0 = not waterproof. 1 = waterproof.
To get a 1 on the third digit, a glove needs a fully sealed coating or a waterproof membrane. A standard latex-coated glove won't pass. You need a proper waterproof construction.
Don't confuse water-resistant with waterproof here either. A partially coated glove sheds light rain. It soaks through under a sustained downpour. For all-day rain work, you need that third digit to be 1.
In cold rain — autumn and winter outdoor work — look for EN 511 gloves with a good first-digit score too. Cold air plus wet skin is a fast path to cold stress.
Browse our waterproof cut-resistant gloves if your job also involves sharp materials or blades.
Portwest AP80 Liquid Pro Waterproof Gloves Latex Foam Grip
Safety boots in wet weather: S3, S5 or wellies?
The right boot depends on the job. Here's how to pick.
S3 is the go-to for most outdoor work. Under EN ISO 20345, the standard that covers all UK safety footwear, S3 gives you:
- Water-resistant upper leather — sheds rain and light mud
- Cleated outsole — grips on uneven, wet ground
- Penetration-resistant midsole — stops nails and sharp debris
- Steel or composite toecap
Check for SRC on the label too. That means the sole has been tested on wet ceramic and wet steel surfaces. It's the slip-resistance test that matters for wet sites. For a full breakdown of S-ratings, see our Safety Trainer Ratings Explained guide.
S5 is fully waterproof — not just water-resistant. If your workers wade through standing water, channels, or deep mud regularly, S5 is the right call.
Wellington boots work well for agricultural work, groundskeeping, and anywhere there's standing water with no penetration risk. They're not a substitute for a safety boot on a construction site. For a full guide to wellingtons at work, see The Complete Guide to Wellington Boots for Work.
Browse our waterproof safety boots and construction footwear ranges to compare options.
Base BE-OSLO S3 Safety Boot Waterproof Cold Insulated Work Boot
Head protection and hi-vis in the rain
Rain makes visibility worse. That's when your hi-vis matters most.
EN ISO 20471 is the standard for high-visibility clothing. It has three classes based on how much fluorescent and reflective material is on the garment:
- Class 1 — low-risk environments only
- Class 2 — minimum for most UK construction sites
- Class 3 — roadside work, near fast-moving traffic
The best wet weather option combines both standards in one garment. A jacket rated EN 343 + EN ISO 20471 keeps you dry and visible. No layering decisions needed. Our Hi-Vis Winter Clothing Guide covers this in detail.
Hard hats in rain. A standard hard hat has no rain protection. Waterproof hard hat covers are available and cheap. A hooded waterproof jacket can do the job when a hard hat isn't required — but never use a hood instead of a hard hat on a site that requires one.
Safety glasses in rain. Rain causes fogging on standard safety glasses. Look for lenses with anti-fog coating if your workers wear eye protection outdoors. Fogged lenses are no lenses at all.
For more on staying safe and visible in cold, wet conditions, see our Hi-Vis Winter Workwear guide.
Leo Workwear Buckland Hi Vis Softshell Jacket Yellow EcoViz Waterproof
Layering for all-day rain work
The outer shell keeps rain out. But it's the layers underneath that keep you warm.
Wet cold is worse than dry cold. A soaked base layer pulls heat away constantly. The three-layer system fixes this:
- Base layer — moisture-wicking fabric (merino wool or synthetic). Pulls sweat away from your skin. Keep it dry from the inside out.
- Mid layer — fleece or softshell. Traps warm air. Don't skip this in cold rain — it's the difference between comfortable and hypothermic over a full shift.
- Outer layer — EN 343-rated waterproof shell. Blocks rain and wind. Breathable so moisture can still escape.
If you're moving in and out of heated spaces, the mid layer is easy to remove and add back. That flexibility matters on a long shift.
Quick buying checklist
Use this before placing an order. Tick each box for every item you're buying.
- Jacket: EN 343 rated? What class (aim for 3:3 or above for all-day rain)? Taped seams? Hooded? EN ISO 20471 if hi-vis is needed?
- Trousers: EN 343 rated? Hi-vis if needed? Adjustable waist and ankle?
- Gloves: EN 511 rated? Third digit = 1 (waterproof)? Cold score suitable for the temperature?
- Boots: S3 minimum for outdoor sites? SRC sole? S5 if standing water is likely? Steel or composite toe as required?
- Head: Hard hat cover if needed? Anti-fog lenses for glasses wearers?
- Mid layer: Fleece or softshell in cold conditions?
- Employer check: Has a risk assessment been done? Is PPE provided free of charge?
Frequently asked questions
Can I be forced to work in heavy rain?
There's no UK law that bans working in rain, however heavy. Your employer must carry out a risk assessment and provide suitable PPE where the weather poses a genuine health or safety risk. If the conditions are dangerous beyond what PPE can manage — for example, a flood, lightning, or a structural risk — work should be stopped. Normal rain with the right wet weather gear in place is not, legally, grounds to stop work.
What EN 343 class do I need for outdoor work?
For most UK outdoor work in sustained rain, look for EN 343 Class 3:3 as a minimum. The first number (3) means the fabric and seams resist water penetration at 13,000 pascals after pre-treatment — simulating real wear. The second number (3) means the jacket is classed as breathable, so you won't overheat. For very heavy or prolonged rain, options with Class 4 water penetration exist under the updated BS EN 343:2019 standard.
What's the difference between waterproof and water-resistant workwear?
Water-resistant clothing has a surface treatment that beads water off when the garment is new. It doesn't hold up in heavy or sustained rain, and it degrades with washing and wear. Waterproof clothing is constructed with membranes and sealed seams, and independently tested to a standard like BS EN 343:2019. Always check for the EN 343 mark — "water-resistant" on the label is not the same thing.
Do I need EN 511 gloves just for working in the rain?
Not always — EN 511 covers cold protection as well as waterproofness. If you're working in warm rain and just need a grip glove that stays dry, look for a glove with a waterproof membrane that's tested to EN 511 with a third-digit score of 1. If you're working in cold rain — autumn through spring in the UK — look for EN 511 gloves with a strong first-digit score too, so your hands stay warm as well as dry.
What safety boot rating do I need for wet outdoor ground?
For most UK outdoor sites, S3 SRC is the right choice. S3 gives you a water-resistant upper, a grip sole, and a penetration-resistant midsole. SRC means the sole has been tested on wet ceramic and steel — that's the wet slip-resistance test. If your workers are regularly in standing water or deep mud, consider S5, which is the fully waterproof version of S3.
Does my employer have to pay for wet weather PPE?
Yes. Under the Personal Protective Equipment at Work Regulations 1992, employers must provide PPE free of charge where a risk assessment shows it is needed to protect workers. This was extended in 2022 to cover limb (b) workers — including many contractors and agency workers. You should not be asked to buy your own PPE for work-related hazards.