Surf Forecasts:
The Boiler surf forecast from 11 Sep 2026:
- Best quality surf: Sunday 13 Sep, 7AM (local time) - 4.5ft (1.4m), 7s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 4PM (local time) - 6.5ft (2.0m), 7s period, W swell with 439 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 7AM (local time) - 4.5ft (1.4m), 7s period with WSW swell.
Best Forecast Surf Conditions for The Boiler this week:
The surf forecast for The Boiler over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 13) at 7AM. The primary swell is predicted to be 1.4m and 7s period with a secondary swell of 0.7m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at The Boiler in the next 16 days are 2.0m 7s and forecast to arrive on Thursday (Sep 17) at 4PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Tuesday (Sep 15) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 13th Sep) | 4.5ft (1.4m) 7s |
| Best Surf | 7AM (Sun 13th Sep) | 4.5ft (1.4m) 7s |
| Most Powerful | 4PM (Thu 17th Sep) | 6.5ft (2.0m) 7s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s shaping up for The Boiler over the next couple of weeks. I gotta be straight with you – it’s looking like a pretty quiet run, with only one real window that’s worth getting excited about. The rest of the time, you’re mostly staring at flat, weak lines and wonky wind.
The best chance to get wet hits us on Friday, September 11th. The morning is the standout. We’ve got a clean 4ft swell pushing in from the WSW with a 9-second period. The combined energy is a moderate 277, so there’s some decent push behind it. The real kicker is the wind – a light 15 km/h cross-offshore breeze out of the NW, keeping the surface glassy. The water is sitting at 66°, which is a whopping 6° warmer than normal for this time of year, so it’s going to feel like a tropical bath. This is your window. It’s not huge, but for The Boiler, this is about as good as it gets in this forecast. That afternoon, the wind swings and the quality drops right off, so make the morning session count.
After that, we hit a major dry spell. From Saturday the 12th all the way through to the end of the month, it’s a long, sad story. The swell stays small, mostly under 3ft, and the period is often short and weak. On top of that, the wind is a constant problem, mostly cross-on or just messy. There’s a little spike in size on Thursday, September 17th, with a 7ft W swell, but the period is a short 7 seconds and the wind is still cross-off. The energy jumps to 439, so it’s got some punch, but the quality just isn’t there for a good ride. It’s too lumpy. We get a few clean mornings here and there, like on Tuesday the 15th and Wednesday the 16th, but the swell is just too small to do anything with. By the end of the run, we’re talking about knee-high dribble with a 16-second period on the 26th – a long wait between sets for nothing.
Honestly, if you’re itching for a paddle, Friday morning is your only real shout. The rest of the time, the board is staying in the car. The Boiler is an inconsistent reef, so this kind of blank run isn't totally out of the ordinary, but it still stings when you see it laid out.
Stay tuned, forecasts can change. Rusty out.
Short Range ForecastLight rain (total 4mm), mostly falling on Sat night. Very mild (max 18°C on Sun night, min 14°C on Fri night). Winds decreasing (fresh winds from the SW on Sat afternoon, light winds from the WSW by Sun night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Wed night. Very mild (max 19°C on Mon morning, min 12°C on Tue night). Winds increasing (light winds from the NW on Tue night, fresh winds from the W by Wed night). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 9 | WSW 9 | WSW 8 | WSW 5 | WSW 6 | WSW 7 | WSW 7 | WSW 10 | WSW 9 | WSW 9 | WSW 6 | WSW 6 | WSW 8 | W 8 | W 6 | W 8 | W 10 | W 5 | W 7 | W 7 | W 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 277 | 169 | 90 | 74 | 245 | 302 | 128 | 201 | 121 | 151 | 55 | 39 | 96 | 33 | 74 | 136 | 183 | 59 | 302 | 439 | 251 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross-on | cross | cross-off | 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 |
High Tide | 7:36PM9.85m | 7:58AM9.68m | 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 | ||||||||
Low Tide | 1:23PM0.98m | 1:50AM0.87m | 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 | ||||||||
 | |  |  | |  | |  |  | | | |  | |  | | | | | | | |
 | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — |
 | — | 7:40 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — |
mm | — | — | — | — | — | 3 | — | — | 1 | — | — | — | 1 | — | — | — | — | 3 | — | — | — |
Temp °C | 16 | 17 | 15 | 17 | 17 | 17 | 17 | 17 | 18 | 19 | 19 | 18 | 17 | 17 | 14 | 14 | 15 | 16 | 15 | 16 | 14 |
Feels °C | 15 | 15 | 13 | 12 | 12 | 13 | 16 | 15 | 18 | 18 | 17 | 17 | 14 | 12 | 12 | 10 | 10 | 12 | 10 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 9 | WSW 8 | W 8 | — | W 8 | WSW 7 | WSW 10 | WSW 9 | WSW 9 | W 9 | WSW 6 | WSW 8 | W 8 | W 6 | W 8 | — | W 10 | W 10 | — | W 7 |
| kJ | 277 | 169 | 90 | 48 | — | 217 | 128 | 201 | 121 | 132 | 39 | 39 | 96 | 33 | 74 | 136 | — | 53 | 8 | — | 251 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 13 | — | — | — | W 8 | W 11 | WSW 10 | WSW 10 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 3 | — | — | — | 33 | 2 | 21 | 31 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 10 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | WSW 5 | WSW 6 | WSW 7 | — | — | — | WSW 9 | WSW 6 | — | — | WNW 5 | NNW 4 | NNW 4 | W 10 | W 5 | W 7 | W 7 | — |
| kJ | — | — | — | 74 | 245 | 302 | — | — | — | 151 | 55 | — | — | 49 | 11 | 16 | 183 | 59 | 302 | 439 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 111 | 133 | 319 | 278 | 0 | 48 | 20 | 133 | 133 | 96 | 0 | 0 | 0 | 320 | 587 | 360 | 360 | 48 | |
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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