Surf Forecasts:
The Boiler surf forecast from 12 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 7AM (local time) - 8ft (2.5m), 8s period, WSW swell with 837 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 2.5m 8s and forecast to arrive on Saturday (Sep 19) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Wednesday (Sep 16) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Sat 19th Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what's on the table for the next couple of weeks. To be straight with you, it's a pretty bleak run for The Boiler. We've got clean conditions popping up here and there, but the swell just isn't cooperating. The water is sitting at 66°, which is a whopping 6° warmer than usual for this time of year – that's very unusual.
The forecast opens on Saturday, September 12th, with a messy, cross-onshore blow right from the get-go. The swell is around 5ft from the WSW but with a short, weak period of only 6 seconds, and the combined energy is a weak 174. It's lumpy and poor, a total non-starter. That afternoon the wind picks up even more, and by Sunday the 13th, the swell is still small and junky with a cross-shore wind messing up any potential. The whole first week is basically a write-off. We get some clean windows from Tuesday the 15th through Friday the 18th, with light cross-offshore winds from the NW and WNW, but the swell is tiny – barely 3ft to 5ft, with weak energy readings (maxing out at 193) and short periods. You could paddle out for a solo session on a foamie, but it's not what you'd call surf.
There is one moment that stands out, but it's not a good one. On Sunday, September 20th, the afternoon sees a big jump in swell to 10ft from the WSW. However, the wind is howling SW at 22 mph, making it a fresh cross-onshore mess, giving us a very high combined energy of 974. At that size and with that wind, this reef break is a washing machine for experts only, and with those onshore conditions, it's really more of a kite-surfing setup than a paddle surfer's dream. You'd be mad to go out.
After that, the swell just drops off a cliff. From Monday the 21st all the way to the end of the outlook on Sunday the 27th of September, we are looking at tiny, gutless surf. Swell heights drop to between 0.3ft and 3ft, with energy values barely cracking triple digits and mostly sitting in the teens and twenties. The wind tries to give us a few clean moments on the 23rd and 26th, but with a swell that small, there's just nothing to ride.
The Boiler is inconsistent at the best of times, and this 16-day run is a perfect example of a blank spell for the area. The only real "standout" is the 10ft pulse on the 20th, but it's a dangerous, windy mess. If you're a kiter, maybe you have a look. For the rest of us, it's a long stretch of flat, clean water.
Stay patient, Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Sat night. Very mild (max 19°C on Mon afternoon, min 16°C on Sat morning). Winds decreasing (fresh winds from the SW on Sat morning, light winds from the WSW by Sun night). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Wed night. Very mild (max 17°C on Tue morning, min 14°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
AM | 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 6 | WSW 7 | W 8 | WSW 7 | WSW 10 | WSW 9 | WSW 9 | WSW 6 | WSW 6 | W 7 | W 7 | W 8 | W 9 | WSW 10 | WSW 6 | W 6 | W 7 | W 6 | W 6 | WSW 6 | WSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 134 | 348 | 253 | 145 | 235 | 153 | 132 | 85 | 48 | 161 | 157 | 157 | 270 | 102 | 54 | 151 | 157 | 74 | 84 | 85 | 184 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross | 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 | 1:58PM0.91m | 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 | ||||||||
 | |  |  | |  | | | |  | |  | | | | | | | | |  | |
 | 6:45 | — | — | 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 | — | — | 13 | — | — | 1 | — | — | 2 | — | — | — | — | — | 5 | — | — | — | — | — | 2 |
Temp °C | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 19 | 18 | 17 | 16 | 16 | 15 | 15 | 16 | 15 | 15 | 15 | 16 | 16 | 17 |
Feels °C | 11 | 12 | 16 | 16 | 16 | 18 | 18 | 19 | 16 | 13 | 11 | 12 | 11 | 9 | 11 | 9 | 9 | 10 | 11 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | — | — | W 8 | WSW 7 | WSW 10 | WSW 9 | WSW 9 | WSW 6 | WSW 8 | W 7 | — | W 8 | W 9 | WSW 10 | WSW 10 | WSW 10 | — | WSW 8 | WSW 11 | W 13 | W 12 |
| kJ | — | — | 253 | 145 | 235 | 153 | 132 | 85 | 22 | 161 | — | 157 | 270 | 102 | 33 | 19 | — | 60 | 13 | 14 | 11 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 10 | W 10 | — | — | — | W 12 | W 11 | — | — | — | — | W 10 | — | — | W 9 | W 9 | — | W 12 |
| kJ | — | — | — | 48 | 48 | — | — | — | 3 | 9 | — | — | — | — | 49 | — | — | 6 | 2 | — | 11 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | WSW 7 | — | — | WSW 7 | — | — | — | WSW 6 | — | W 7 | NW 4 | — | W 6 | WSW 6 | W 6 | W 7 | W 6 | W 6 | WSW 6 | WSW 6 |
| kJ | 134 | 348 | — | — | 84 | — | — | — | 48 | — | 157 | 10 | — | 50 | 54 | 151 | 157 | 74 | 84 | 85 | 184 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 319 | 320 | 133 | 0 | 63 | 111 | 133 | 133 | 101 | 48 | 19 | 0 | 0 | 151 | 320 | 320 | 360 | 360 | 133 | 367 | 133 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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‘Porth Neigwl: Choppy waves hadn't tidied much (from what I could see in the dark.’
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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.
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