You’ve just finished your third parkrun, you’re hooked, and now you’re squinting at your phone strapped to your arm trying to read your pace while dodging puddles on a Saturday morning. Sound familiar? A proper running watch changes everything — but you don’t need to remortgage to get one. The best running watch under 150 UK money can buy in 2026 offers GPS tracking, heart rate monitoring, and training features that would have cost twice as much three years ago.
The good news: this price bracket has exploded. Where you once had to choose between “cheap and basic” or “expensive and good,” there are now several genuinely excellent watches sitting between £100 and £150 that’ll serve you from Couch to 5K right through to marathon training.
Best Overall: Garmin Forerunner 165
If you want the short answer, here it is. The Garmin Forerunner 165 is the best running watch under £150 in the UK right now, and it’s not particularly close. At around £130-£140 from Amazon UK, Argos, or directly from Garmin, you’re getting a bright AMOLED display, multi-band GPS, and the full Garmin Connect ecosystem — features that were exclusive to £300+ watches just two years ago.
What makes it special is how complete the package feels. You get training readiness scores, suggested daily workouts, morning reports, and race time predictions that actually improve as the watch learns your fitness. The GPS accuracy is excellent — Garmin’s multi-band system, documented in their GPS technology overview, delivers tracks that match more expensive models almost identically. Battery life sits at about 11 days in smartwatch mode, or roughly 19 hours with continuous GPS, which is more than enough for anything up to an ultra.
The 165 also handles the day-to-day smartwatch stuff well. Notifications from your phone, contactless payments via Garmin Pay, and a music storage option on the 165 Music variant (though that one creeps above £150 at full price). For most runners, the standard model has everything you need.
Where it falls short: The screen is smaller than some competitors at 1.2 inches, and the strap can feel a bit stiff out of the box — give it a week. There’s no offline maps, either, so if you want turn-by-turn trail navigation, you’ll need to look at the Forerunner 265 or a COROS with maps.
Buy it from: Amazon UK, Argos, Decathlon, or Garmin.co.uk — prices regularly dip to £130 during sales.
How to Choose a Running Watch Under £150
Before scrolling through individual watches, it’s worth knowing what actually matters at this price point — and what’s just marketing fluff.
- GPS accuracy — This is the whole point. Multi-band (dual-frequency) GPS is the gold standard and is now available under £150. It reduces signal bounce in cities and under tree cover. Single-band GPS works fine on open roads but can wander in urban areas or dense woodland.
- Heart rate sensor — Every watch here has optical wrist-based HR. They’re all decent for steady runs but can struggle with interval sessions. If heart rate zone training matters to you, consider pairing with a chest strap like the Polar H10 (about £65 from Amazon UK).
- Battery life — You want at least 15 hours of GPS time for marathon training. All the watches below deliver that. If you’re eyeing ultras, look for 25+ hours.
- Display type — AMOLED screens are vibrant and easy to read, but use more battery. MIP (memory-in-pixel) displays look duller but are brilliant in direct sunlight and last days longer. Neither is objectively better — it depends on whether you train mostly outdoors or want a watch that also looks good off-wrist.
- Training features — At this level, you should expect interval timers, customisable data screens, and at minimum basic training load tracking. The more advanced watches here offer VO2 max estimates, recovery advisors, and structured workout support.
If you’re new to running, our complete beginner’s running guide covers the fundamentals worth pairing with any of these watches.
COROS PACE 3: Best Value for Serious Runners
The COROS PACE 3 has been the darling of the running community since its launch, and for good reason. At about £120-£130 from Sigma Sports or Amazon UK, it undercuts the Garmin 165 while matching or exceeding it in several areas.
The standout number is battery life: 38 hours of GPS tracking with the standard band, or a frankly absurd 24 days in regular watch mode. If you run six times a week and hate charging things, the COROS wins here by a country mile. The watch itself weighs just 39g with the silicone strap, making it one of the lightest GPS watches you can buy at any price.
COROS has also caught up on training features. The EvoLab system tracks your running fitness, threshold pace, marathon prediction, and base fitness — all through the COROS app, which has improved massively over the past year. It supports structured workouts from Training Peaks and Final Surge too, so if your coach sends you sessions, they’ll sync directly.
Where it falls short: The display is MIP rather than AMOLED, which means it looks a bit washed out indoors. The watch face options are limited compared to Garmin, and the app ecosystem is smaller — no Garmin Connect IQ equivalent for downloading custom watch faces or data fields. The touchscreen can also be finicky with wet fingers, though the physical dial button is a clever workaround.
Buy it from: Sigma Sports, Amazon UK, or coros.com — frequently in stock around £120.
Amazfit T-Rex 3: Best for Outdoor and Trail Runners
If your running takes you off-road — muddy trails through the Chilterns, fell running in the Lakes, or soggy cross-country in January — the Amazfit T-Rex 3 deserves a serious look. It’s built to military-grade toughness standards and comes in at about £130-£145 from Amazon UK.
The T-Rex 3 packs a massive 1.5-inch AMOLED display that’s bright enough to read in full sunshine, dual-band GPS for accurate tracking under tree cover, and offline map support — something you won’t find on either the Garmin 165 or COROS PACE 3 at this price. Battery life is strong too: roughly 50 hours of GPS use, which is really useful for multi-day hiking or ultra events.
Amazfit has improved its software with the Zepp OS 4 platform. It’s not as polished as Garmin Connect, but it covers the essentials: heart rate zones, training load, sleep tracking, and SpO2 monitoring. The watch also integrates with Strava and other third-party platforms, so your runs still appear where your mates can see them.
Where it falls short: The Amazfit ecosystem can’t match Garmin or COROS for serious training metrics. Recovery insights and training readiness feel more basic, and the running dynamics data isn’t as detailed. The watch is also chunkier at 68g — noticeable if you’re used to lightweight race-day watches. And while the build quality is excellent, the software still has occasional quirks that you wouldn’t see on a Garmin.
Buy it from: Amazon UK (best prices), or direct from amazfit.com.
Polar Pacer Pro: Best for Heart Rate Training
Polar has been making heart rate monitors since the 1980s — they invented wrist-based HR training, and it shows. The Polar Pacer Pro sits at about £125-£145 and brings Polar’s best-in-class HR accuracy to a lightweight running watch.
What Polar does better than anyone at this price is training guidance. The watch tells you whether your training is balanced across different zones — are you doing enough easy runs? Too much threshold work? The Training Load Pro feature gives you a simple traffic light system: green means your training is productive, red means you’re overdoing it. For runners following structured plans or preparing for a first 5K or 10K, this feedback is gold.
Running power is built in without needing a foot pod — something Garmin charges extra for. Hill Splitter automatically separates your uphills and downhills, which is brilliant for anyone training on hilly routes. The watch weighs 41g and has a clean, minimal design that works just as well with jeans as it does with running kit.
Where it falls short: No AMOLED display — you get a MIP screen that’s functional but not exciting. No music storage, no contactless payments, and the Polar Flow app, while data-rich, has a learning curve. GPS accuracy is generally good but can lag slightly behind the multi-band systems on the Garmin 165 and COROS PACE 3.
Buy it from: Amazon UK, Polar.com, or Sweatband.com.
Garmin Forerunner 55: Best Budget Entry Point
If £130+ feels like a stretch and you’d rather start closer to £100, the Garmin Forerunner 55 remains a cracking option. It’s regularly available for £90-£110 from Argos, Amazon UK, and Decathlon, making it the cheapest way into the Garmin ecosystem.
Don’t let the lower price fool you — this watch still delivers the fundamentals brilliantly. GPS accuracy is solid (single-band, but reliable on roads and park paths), the heart rate sensor is accurate enough for zone-based training, and you get the full Garmin Connect experience including suggested daily workouts, PacePro pacing, and race predictions. Battery life of around 14 days in smartwatch mode and 20 hours GPS is impressive.
If you’ve read our guide to the best running watches under £100, you’ll know the Forerunner 55 consistently ranks at the top. It’s proof that you don’t need every feature going to become a better runner.
Where it falls short: No AMOLED display, no touchscreen (button-only navigation), no multi-band GPS, no barometric altimeter, and no music. The physical design looks dated next to the 165 or PACE 3. These are all fair trade-offs at the price, but if your budget can stretch another £30, the jump to the Forerunner 165 is worth it.
Buy it from: Argos (often cheapest), Amazon UK, Decathlon, or Garmin.co.uk.
Garmin Forerunner 165 vs COROS PACE 3: Which Should You Buy?
These two dominate the under-£150 bracket, so let’s cut to it.
Choose the Garmin Forerunner 165 if:
- You want an AMOLED display that looks stunning
- You value the Garmin Connect ecosystem and third-party app support
- You want Garmin Pay for contactless payments
- You prefer a more polished, mainstream software experience
Choose the COROS PACE 3 if:
- Battery life is your top priority (38 hours GPS vs 19 hours)
- You want the lightest watch possible (39g vs 42g)
- You follow structured training plans from Training Peaks or Final Surge
- You’re comfortable with a slightly less polished but rapidly improving ecosystem
Both watches have excellent GPS accuracy, reliable heart rate sensors, and thorough training features. If I had to pick one for a typical UK road and parkrun runner, I’d go Garmin 165 — the screen is just that good, and the ecosystem advantage matters when you’re tracking training over months and years. But the COROS PACE 3 is a brilliant watch, and if battery life matters to you, it’s the clear winner.
Features That Matter (and Features That Don’t)
At this price, marketing can be misleading. Here’s what’s truly useful versus what’s nice to have.
Worth paying for:
- Multi-band GPS — Measurably better accuracy in built-up areas and under trees
- Training load tracking — Prevents overtraining and helps you peak for races
- AMOLED display — Much easier to read at a glance mid-run
- Structured workout support — Essential if you follow a training plan
Nice but not essential:
- Music storage — Most runners carry their phone anyway
- Contactless payments — Useful for grabbing a post-run coffee, but hardly essential
- SpO2 monitoring — More novelty than actionable for most runners
- Sleep tracking — All these watches do it, but the data rarely changes behaviour
Don’t fall for:
- “100+ sport modes” — You’re buying a running watch. You need running, maybe cycling, possibly swimming. Not paragliding and badminton.
- “Military-grade durability” — Unless you’re running ultras through actual wilderness, a standard running watch handles rain and mud just fine
According to the British Heart Foundation, wearable fitness tech can be a useful motivator, though they recommend focusing on how you feel rather than obsessing over every metric. Good advice — don’t let the watch make running less fun.
Frequently Asked Questions
Is a running watch worth it if I only run twice a week?
A running watch is worth it even if you run once a week. Seeing your pace, distance, and heart rate helps you run at the right effort level — most beginners run too fast on every single run. A watch doesn’t just track your runs; it teaches you to train smarter. Even the cheapest GPS watch gives you data that a phone can’t match for convenience.
Can I swim with these running watches?
Every watch on this list is water-resistant to at least 50 metres (5 ATM), which means pool swimming is fine. The Garmin 165 and COROS PACE 3 both have dedicated swim modes that track laps, stroke type, and pace. The Amazfit T-Rex 3 is rated to 100 metres. Just avoid pressing buttons underwater and rinse with fresh water after sea swims — the salt is what causes problems, not the depth.
Do I need a chest strap as well?
For most runners, no. Wrist-based heart rate is accurate enough for steady runs and general training. If you’re doing serious interval training or using heart rate zones for structured plans, a chest strap like the Polar H10 (about £65 from Amazon UK) gives noticeably better accuracy during rapid HR changes. Think of it as an upgrade you can add later rather than a day-one requirement.
How accurate is GPS on cheaper running watches?
Multi-band GPS watches (Garmin 165, COROS PACE 3, Amazfit T-Rex 3) are within 1-2% of actual distance on most runs — close enough for race training. Single-band watches like the Forerunner 55 can drift by 3-5% in tricky conditions (narrow streets, heavy tree cover). For parkruns and road running, even single-band GPS is perfectly adequate.
Will a £150 watch last me through marathon training?
Yes — every watch here has the battery life, GPS accuracy, and training features to support a full 16-20 week marathon programme. The Garmin 165 and COROS PACE 3 are particularly good choices because they’ll last the entire marathon itself on a single charge while tracking every split. Pair one with decent running shoes and a solid training plan, and the watch becomes one of the most useful tools in your kit.
The Bottom Line
The best running watch under 150 UK money can buy right now is the Garmin Forerunner 165. It nails the balance between features, accuracy, display quality, and ecosystem support. The COROS PACE 3 is a very close second — better on battery life and weight, slightly behind on software polish. Either watch will serve you well from your first 5K through to marathon day and beyond.
If you’re stretching a tighter budget, the Forerunner 55 at around £100 is still a brilliant buy that does the core job without any fuss. And if trails are your thing, the Amazfit T-Rex 3 gives you offline maps and rugged durability that the others can’t match.
Whatever you choose, the best advice is simple: pick one, strap it on, and get out the door. The watch doesn’t make you faster — the running does. But having one on your wrist makes the process a lot more fun.