
Surf Forecasts:
The Boiler surf forecast from 13 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 4AM (local time) - 7ft (2.2m), 7s period, WSW swell with 528 kJ wave energy.
Best Forecast Surf Conditions for The Boiler this week:
The most powerful waves expected at The Boiler in the next 16 days are 2.2m 7s and forecast to arrive on Saturday (Sep 19) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Sat 19th Sep) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, let’s get real here. I’ve looked over the numbers for this stretch, and I gotta be straight with you – it’s a pretty flat and grim run for The Boiler. The finder isn’t picking out any solid windows for a proper surf, and the guidance confirms it: this is an inconsistent reef that’s barely showing a pulse.
Right now, the water temp is sitting at a very unusual 66°, which is over five degrees warmer than normal for the time of year. That’s a big outlier, something you don’t see often.
We start with Saturday the 12th. A messy 7 ft swell from the WSW, but with a 25 mph cross-on wind, it’s blown-out and chopped-up. Combined wave energy is at 362, which is moderate, but with the wind tearing it apart, it’s poor. Forget it. Sunday the 13th drops to 4 ft but stays poor with cross-shore winds and a cross-chop. The energy drops to 189 – still weak to moderate. Monday the 14th is similar, 3 ft and choppy. Tuesday the 15th gives us a bit of cross-offshore wind, making things clean, but it’s only 4 ft and the period is a short 7 seconds – not much push. Energy is 170.
Wednesday the 16th morning sees clean conditions again with a 4 ft swell from the W, 8-second period, energy up to 230. Still, the scores say poor. Thursday the 17th and Friday the 18th are all clean but small, with the swell dropping to 3 ft and energy falling to 111. Saturday the 19th picks up to 5 ft but with a 22 mph cross wind, creating lumpy chop. Energy is 256, but it’s not surfable.
Now, there’s a tiny glimmer on Monday the 21st of September. In the morning, we get glassy conditions – NW wind at just 3 mph – with a 4 ft swell from the W. The energy is 102, and the report says “surfable waves but very ordinary conditions.” That’s the only nod towards anything rideable in the whole 16 days. But even then, it’s weak and inconsistent.
After that, it’s a long, flat fade. From Tuesday the 22nd all the way through to Sunday the 27th, we’re looking at waves from 1 ft down to a pathetic 0.3 ft. The combined energy drops into single digits. On the 23rd and 24th it’s glassy but flat as a pancake. By the 27th, we’ve got a 0.3 ft swell with a very long 14-second period, but with no height, it’s just a ripple.
Honestly, there are no standouts here. The whole 16-day window is a bust for surf. For a break that’s already inconsistent, a run like this is just normal for the area. Don’t hold your breath, but forecasts can change. Keep an eye on it.
Rusty
Short Range ForecastModerate rain (total 13mm), heaviest on Sat night. Very mild (max 19°C on Mon afternoon, min 16°C on Tue morning). Winds decreasing (strong winds from the SW on Sat afternoon, light winds from the WSW by Sun night). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Very mild (max 16°C on Tue afternoon, min 13°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | ||||||||||||||||||||
Wave Height (m) Direction Period (s) | WSW 7 | W 8 | WSW 7 | WSW 10 | WSW 9 | WSW 9 | WSW 9 | WSW 6 | WSW 7 | W 7 | W 8 | W 8 | W 10 | W 10 | W 6 | W 7 | W 6 | W 6 | WSW 5 | WSW 7 |
Wave Graph | ||||||||||||||||||||
362 | 253 | 121 | 253 | 153 | 151 | 134 | 64 | 161 | 130 | 186 | 230 | 296 | 204 | 126 | 130 | 50 | 78 | 64 | 453 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | cross | cross-on | cross-on |
High Tide | 8:13PM9.85m | 8:32AM9.62m | 8:46PM9.69m | 9:03AM9.43m | 9:17PM9.39m | 9:32AM9.11m | 9:45PM8.97m | 10:00AM8.68m | 10:13PM8.45m | 10:28AM8.16m | 10:42PM7.86m | 11:00AM7.58m | 11:19PM7.23m | |||||||
Low Tide | 2:22AM0.93m | 2:30PM0.99m | 2:51AM1.13m | 2:58PM1.20m | 3:16AM1.44m | 3:26PM1.54m | 3:42AM1.85m | 3:54PM2.00m | 4:07AM2.35m | 4:23PM2.56m | 4:36AM2.93m | 5:00PM3.19m | ||||||||
— | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | |
7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | |
mm | — | 8 | 1 | — | 2 | — | — | 2 | — | — | — | — | — | 2 | 1 | — | — | — | — | 4 |
Temp °C | 17 | 18 | 18 | 18 | 18 | 18 | 19 | 18 | 17 | 16 | 16 | 15 | 15 | 16 | 15 | 15 | 15 | 15 | 16 | 18 |
Feels °C | 11 | 15 | 18 | 17 | 18 | 16 | 18 | 16 | 13 | 10 | 12 | 10 | 9 | 11 | 10 | 9 | 10 | 10 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | — | W 8 | WSW 7 | WSW 10 | WSW 9 | WSW 9 | — | WSW 8 | WSW 7 | — | W 8 | W 8 | — | W 10 | WSW 10 | W 10 | W 7 | WSW 13 | W 13 | W 12 |
— | 253 | 121 | 253 | 153 | 132 | — | 23 | 161 | — | 186 | 230 | — | 196 | 19 | 17 | 38 | 17 | 13 | 11 | |
Swell 2 Height (m) Direction Period (s) | — | — | W 10 | — | — | — | — | WSW 8 | W 11 | — | — | — | — | — | — | — | WSW 9 | W 9 | — | — |
— | — | 68 | — | — | — | — | 22 | 9 | — | — | — | — | — | — | — | 29 | 2 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | WSW 9 | W 14 | — | — |
— | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | 29 | 14 | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 7 | — | — | — | — | WSW 9 | WSW 9 | WSW 6 | — | W 7 | — | — | W 10 | W 10 | W 6 | W 7 | W 6 | W 6 | WSW 5 | WSW 7 |
362 | — | — | — | — | 151 | 134 | 64 | — | 130 | — | — | 296 | 204 | 126 | 130 | 50 | 78 | 64 | 453 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 308 | 133 | 133 | 48 | 101 | 133 | 133 | 125 | 144 | 360 | 0 | 9 | 63 | 349 | 360 | 360 | 431 | 367 | 308 | 597 |
Best forecast wave conditions in Wales - Gower | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the The Boiler Surf forecast
The above surf forecast table for The Boiler provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Boiler can be found by selecting the local surf guide option on the grey menu. Our The Boiler surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (The Boiler) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for The Boiler may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
The Boiler is 9 km (6 miles) from Swansea. If you plan a holiday in Wales - Gower, look for hotels and other accommodation in Swansea. Swansea has rooms for a wide range of budgets as well as car hire and transport links.











