Surf Forecasts:
The Boiler surf forecast from 13 Sep 2026:
- Most powerful swell: Friday 18 Sep, 10PM (local time) - 8ft (2.5m), 7s period, WSW swell with 657 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 7s and forecast to arrive on Friday (Sep 18) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Wednesday (Sep 16) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Fri 18th Sep) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, let me level with you: the next couple of weeks are looking pretty bleak. We’ve got a flat spell coming, and honestly, there’s not much to get fired up about for a while.
Right now, and for the foreseeable future, The Boiler is the only spot in the game, but it’s not looking good. This reef break can be a bit inconsistent, and that’s the story here. We start off on Sunday, September 13th, with some light rain and a bumpy, choppy 4ft swell from the WSW. The wind is a cross-on, making things messy. The water is sitting at 66°, which is way warmer than normal for this time of year – that’s a bit unusual.
That afternoon, the wind eases a little and goes cross-shore, but the surf is still poor. The combined energy is moderate (492), but it’s just not clean. Monday and Tuesday are more of the same: cross-shore winds and lumpy conditions. The swell hangs around the 3ft to 5ft mark, but it’s all short-period windswell (7-9 seconds), so the shape will be poor.
Now, late on Tuesday afternoon, September 15th, we get a small window. The wind goes cross-offshore from the WNW at 18 mph, and the swell bumps up a touch to 5ft. It’s cleaner, but still only a 7-second period, so not much power. The combined energy is moderate (262). Not a standout, but the cleanest we’ve seen so far.
Wednesday, September 16th, is actually our best bet for the whole period. The morning shows a 5ft swell from the W with a longer 10-second period, and clean cross-offshore wind from the NW at 15 mph. The combined energy jumps to strong (535). This is the pick of the fortnight – clean lines and a bit of punch. The afternoon holds similar, cleaner conditions, though the swell drops a little.
From Thursday the 17th onward, it’s a slow decline. We get a few clean mornings, but the swell fades quickly. By the weekend, we’re looking at messy, cross-onshore wind and dropping swell. From around Sunday the 20th, the energy falls off a cliff – we’re talking weak combined energy (92 and lower) and tiny waves. The last week of September is pretty much flat, with a couple of glassy days on the 23rd and 24th, but the swell is under 2ft. There’s a brief blip on Monday the 28th with a clean 3ft swell, but it’s nothing to write home about.
So, to be honest, there’s only one real standout: Wednesday, September 16th. Get on it if you can. The rest is a waiting game.
Rusty
Short Range ForecastLight rain (total 7mm), mostly falling on Sun morning. Very mild (max 19°C on Mon night, min 13°C on Tue night). Winds increasing (light winds from the WSW on Sun afternoon, fresh winds from the WNW by Tue morning). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Wed night. Very mild (max 17°C on Fri afternoon, min 13°C on Thu night). Winds increasing (light winds from the W on Wed night, strong winds from the WSW by Fri afternoon). | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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 7 | WSW 10 | WSW 9 | WSW 9 | WSW 9 | WSW 6 | WSW 7 | W 7 | WSW 8 | W 10 | W 10 | WSW 5 | W 7 | W 7 | W 7 | W 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 137 | 295 | 153 | 151 | 172 | 80 | 186 | 208 | 207 | 415 | 284 | 102 | 257 | 245 | 320 | 247 | 339 | 512 | 498 | 482 | 302 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross | cross-on | cross | cross | cross | cross |
High Tide | 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 | 11:50AM6.98m | 00:25AM6.64m | ||||||||
Low Tide | 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 | 5:15AM3.56m | 6:01PM3.82m | ||||||||
 |  |  | | | |  | |  | |  | |  | |  | | |  | | | | |
 | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — |
 | — | 7:36 | — | — | 7:34 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — |
mm | 2 | — | 1 | 1 | — | 3 | — | — | — | — | — | 2 | 1 | — | — | — | 1 | 1 | — | — | — |
Temp °C | 18 | 18 | 18 | 17 | 18 | 19 | 16 | 16 | 15 | 15 | 15 | 15 | 16 | 16 | 15 | 15 | 17 | 17 | 16 | 16 | 15 |
Feels °C | 16 | 18 | 17 | 16 | 16 | 17 | 11 | 10 | 11 | 10 | 10 | 10 | 11 | 10 | 10 | 11 | 10 | 11 | 9 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | W 10 | WSW 10 | WSW 9 | WSW 9 | — | WSW 8 | W 11 | W 9 | WSW 8 | W 10 | — | W 10 | W 7 | — | W 9 | W 7 | — | W 12 | — | — | W 8 |
| kJ | 68 | 197 | 153 | 90 | — | 24 | 9 | 54 | 207 | 120 | — | 50 | 257 | — | 108 | 246 | — | 12 | — | — | 291 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | WSW 8 | — | — | — | — | — | W 10 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 14 | — | — | — | — | — | 52 | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 7 | WSW 10 | — | WSW 9 | WSW 9 | WSW 6 | WSW 7 | W 7 | NW 4 | W 10 | W 10 | WSW 5 | — | W 7 | W 7 | W 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 |
| kJ | 137 | 295 | — | 151 | 172 | 80 | 186 | 208 | 10 | 415 | 284 | 102 | — | 245 | 320 | 247 | 339 | 512 | 498 | 482 | 302 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 133 | 133 | 133 | 133 | 133 | 133 | 360 | 431 | 151 | 151 | 48 | 320 | 320 | 388 | 48 | 367 | 644 | 644 | 703 | 278 | 138 |
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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our The Boiler surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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