Surf Forecasts:
The Boiler surf forecast from 9 Sep 2026:
- Best quality surf: Friday 11 Sep, 7AM (local time) - 4.5ft (1.4m), 9s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 10PM (local time) - 6.5ft (2.0m), 8s period, WSW swell with 554 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 7AM (local time) - 4.5ft (1.4m), 9s 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 Friday (Sep 11) at 7AM. The primary swell is predicted to be 1.4m and 9s period. 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 8s and forecast to arrive on Thursday (Sep 10) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Wednesday (Sep 09) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 11th Sep) | 4.5ft (1.4m) 9s |
| Best Surf | 7AM (Fri 11th Sep) | 4.5ft (1.4m) 9s |
| Most Powerful | 10PM (Thu 10th Sep) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, this is Rusty, and I gotta be straight with ya – it’s a lean patch coming up for The Boiler. We’re looking at a pretty grim 16-day window with only one brief moment that might get the heart beating, and a whole lot of flat, windy nothing before and after.
Right out of the gate, the water’s sitting at 67° – a full 6° warmer than average for this time of year, which feels very unusual.
For the next few days, it’s a write-off. Wednesday and Thursday are a mess – cross-off and onshores with a weak, short-period swell.
We finally get a sniff of life on Friday morning, September 11th. The Boiler sees a 4ft swell coming from the WSW with a period of 9 seconds, a proper groundswell. The combined swell energy is moderate (271). The real clincher is the wind – a light NNW cross-off, so it’ll be clean. This is your one standout window. The crowd factor is a potential issue here, as it can get busy, but for this little blip, it might be worth the punt. Get in the water early.
Sadly, that’s it. After Friday, the wind swings southwest and howls, the swell drops, and the surf quality tanks straight back into "poor." There’s a stretch from Saturday the 12th all the way through to the end of the outlook on the 24th where there’s nothing fun on offer – lumpy, choppy, or just straight-up flat, with swell heights dropping to 1ft. We even get a few glassy mornings around the 20th and 21st, but there’s no energy in the water to push a wave.
So, bottom line: mark your calendar for Friday morning, the 11th, for a shot at something clean. Otherwise, the rest of this 16-day run is a good time to wax your board and wait.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu morning, min 13°C on Wed night). Winds increasing (light winds from the W on Wed night, strong winds from the SW by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Sat night. Warm (max 20°C on Mon afternoon, min 15°C on Sun night). Winds decreasing (fresh winds from the SW on Sat morning, calm by Sun night). | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | W 8 | WSW 8 | WSW 8 | WSW 8 | WSW 6 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | WSW 5 | WSW 7 | WSW 7 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | W 8 | WSW 6 | WSW 6 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 161 | 109 | 49 | 21 | 196 | 474 | 271 | 169 | 90 | 95 | 298 | 297 | 143 | 143 | 108 | 80 | 61 | 36 | 64 | 149 | 158 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | on | cross-on | cross | cross-off | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross | on | cross-on | cross-on | cross | cross | cross-off |
High Tide | 6:07PM9.17m | 6:36AM9.24m | 6:54PM9.63m | 7:20AM9.57m | 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 | ||||||||
Low Tide | 11:54AM1.77m | 00:27AM1.35m | 12:42PM1.26m | 1:11AM0.99m | 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 | |||||||
 |  |  | |  | | | | | | |  | | |  | | | |  | | | |
 | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — |
 | — | 7:45 | — | — | 7:43 | — | — | 7:40 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:30 | — |
mm | — | — | — | — | 2 | — | — | — | — | 1 | 2 | 3 | — | — | — | — | — | — | 4 | — | — |
Temp °C | 15 | 15 | 14 | 17 | 17 | 17 | 17 | 16 | 16 | 17 | 17 | 18 | 18 | 17 | 16 | 19 | 20 | 19 | 18 | 18 | 16 |
Feels °C | 11 | 12 | 11 | 12 | 12 | 13 | 16 | 14 | 12 | 12 | 13 | 16 | 16 | 14 | 16 | 20 | 20 | 19 | 17 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | W 8 | WSW 8 | WSW 8 | WSW 8 | W 11 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | W 15 | — | W 7 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | W 8 | WSW 8 | WSW 6 | W 9 |
| kJ | 161 | 109 | 49 | 19 | 2 | 474 | 271 | 169 | 90 | 5 | — | 246 | 143 | 143 | 108 | 80 | 61 | 36 | 22 | 149 | 158 |
Swell 2 Height (m) Direction Period (s) | — | — | W 13 | W 12 | — | — | — | — | — | — | — | — | — | W 13 | — | — | — | — | W 11 | W 10 | — |
| kJ | — | — | 3 | 3 | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | 2 | 19 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 11 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | — | W 6 | — | SW 4 | WSW 6 | — | — | — | — | WSW 5 | WSW 7 | WSW 7 | — | NNW 3 | — | — | — | WSW 5 | WSW 6 | WSW 6 | — |
| kJ | — | 32 | — | 21 | 196 | — | — | — | — | 95 | 298 | 297 | — | 1 | — | — | — | 21 | 64 | 101 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 25 | 275 | 288 | 49 | 0 | 0 | 122 | 147 | 283 | 320 | 136 | 367 | 0 | 20 | 133 | 96 | 3 | 63 | 0 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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.
Nearest