Surf Forecasts:
The Boiler surf forecast from 26 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 4AM (local time) - 2.5ft (0.7m), 7s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 10AM (local time) - 7.5ft (2.3m), 9s period, WSW swell with 863 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 4AM (local time) - 2.5ft (0.7m), 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 Wednesday (Sep 02) at 4AM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.1m and 16s. 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 2.3m 9s and forecast to arrive on Monday (Aug 31) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Thursday (Aug 27) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 2nd Sep) | 2.5ft (0.7m) 7s |
| Best Surf | 4AM (Wed 2nd Sep) | 2.5ft (0.7m) 7s |
| Most Powerful | 10AM (Mon 31st Aug) | 7.5ft (2.3m) 9s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here, and I’m looking at a pretty bleak picture for the next couple of weeks. The Boiler is our only option in the whole forecast period, and to be straight with you, it’s not looking like the kind of spot you want to be on when the wind’s howling and the waves are just messy. It’s a reef break, and when it’s on, it can be magic, but it's also inconsistent. We’ve got a long stretch of poor conditions before anything even remotely surfable shows up.
The first decent chance you’ll see is on Monday the 31st of August, and it’s not exactly something to get the heart racing. The swell is from the WSW, pushing in at about 8 ft with a period of 9 seconds. That's a moderate energy swell (882) and there's some decent size in it. The wind is coming from the WNW, cross-off, and that’s good news for cleaner conditions. This is the only time in the whole outlook where we get a clean look at the wave face. But be warned, the wave energy is strong, and that 8 ft is going to be pretty meaty, so this is for the experienced crew only. It's also likely to be a bit of a crowd magnet, being one of the few windows of opportunity.
On Tuesday the 1st of September, the swell drops off to about 6 ft, but the wind swings to the west and goes cross, making it lumpy. It’s pretty ordinary. Then we’ve got a big gap of nothing much until Saturday the 5th of September. That morning the swell is down to about 3 ft from the WSW with a 6 second period. It’s a small, weak affair (148). But the wind is light from the WNW, cross-off, so it will be clean. This is surfable, but very ordinary. That afternoon, a long period 10-second groundswell from the same direction pushes the wave energy up to a moderate 200, but the wind goes cross, so the surface gets a bit of a chop. It’s still small, around 3 ft, and the long period means it might not be breaking as well as you'd hope at a beach break, but for The Boiler as a reef, the shape should be okay.
After that, things drop off again. We see a little clean patch on Monday the 7th of September afternoon with a 2 ft, 9-second swell from the W and a gentle cross-off, but it’s tiny. Tuesday the 8th of September morning brings a light offshore from the NNW, but the swell is only 1 ft, so it's barely a ripple. That afternoon, the swell builds slightly to 3 ft with a very short 6-second period and a moderate offshore wind. It’s clean, but the wave quality is going to be poor with such a short period.
So, if I had to pick the best of a bad bunch, I’d say the Monday morning of the 31st of August is your standout, if you can handle the size. For the rest of the time, you're chasing tiny, clean windows of small swell. Honestly, for the first week, the only good-looking sessions are Monday the 31st morning and maybe Saturday the 5th. After that, it’s a long wait with almost nothing worth paddling out for. The water temp is 68°, which is about 7° warmer than normal for this time of year—that’s very unusual.
Stay patient, the forecast can change.
Rusty.
Short Range ForecastHeavy rain (total 26mm), heaviest during Fri morning. Warm (max 23°C on Wed afternoon, min 16°C on Fri morning). Winds increasing (light winds from the SSW on Thu morning, fresh winds from the WSW by Fri morning). | Days 5-7 Weather SummaryHeavy rain (total 28mm), heaviest during Sun afternoon. Very mild (max 18°C on Sat afternoon, min 15°C on Sun night). Mainly strong winds. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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 | W 8 | W 7 | W 7 | SW 4 | WSW 7 | WSW 7 | WSW 7 | SW 6 | SW 7 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | WSW 9 | WSW 10 | WSW 7 | WSW 7 | W 7 | WSW 7 |
Wave Graph | ||||||||||||||||||||
12 | 10 | 10 | 4 | 14 | 326 | 344 | 241 | 116 | 125 | 701 | 293 | 300 | 441 | 863 | 683 | 375 | 208 | 155 | 73 | |
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-on | cross-on | on | cross-on | cross-off | cross-on | cross-on | cross | cross-off | cross | cross | cross-off | cross | cross-off |
High Tide | 6:26PM8.66m | 6:45AM8.62m | 7:02PM9.05m | 7:20AM8.96m | 7:36PM9.33m | 7:53AM9.20m | 8:09PM9.52m | 8:25AM9.34m | 8:42PM9.58m | 8:57AM9.36m | 9:15PM9.49m | 9:28AM9.22m | 9:48PM9.24m | |||||||
Low Tide | 00:32AM1.92m | 12:49PM1.83m | 1:08AM1.55m | 1:22PM1.53m | 1:41AM1.29m | 1:53PM1.31m | 2:12AM1.13m | 2:23PM1.21m | 2:43AM1.09m | 2:54PM1.23m | 3:14AM1.21m | 3:24PM1.39m | 3:45AM1.48m | |||||||
— | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | |
8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:06 | — | — | 8:02 | — | |
mm | — | 2 | 3 | 1 | 1 | 9 | 2 | 3 | 5 | 3 | — | 2 | 12 | 3 | — | — | 8 | — | — | — |
Temp °C | 23 | 21 | 19 | 20 | 17 | 16 | 18 | 17 | 18 | 18 | 16 | 18 | 16 | 16 | 16 | 17 | 16 | 16 | 17 | 16 |
Feels °C | 20 | 19 | 19 | 18 | 15 | 10 | 14 | 14 | 15 | 14 | 10 | 15 | 13 | 11 | 12 | 12 | 11 | 12 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 7 | W 7 | W 7 | — | — | — | W 6 | SW 7 | WSW 10 | WSW 9 | — | WSW 8 | — | — | W 7 | W 9 | — | WSW 7 |
12 | 10 | 10 | 4 | 4 | — | — | — | 51 | 125 | 701 | 293 | — | 240 | — | — | 236 | 27 | — | 73 | |
Swell 2 Height (m) Direction Period (s) | SW 7 | SW 7 | SW 5 | SW 7 | W 9 | — | — | — | — | — | — | — | — | — | — | — | W 9 | — | — | SW 16 |
2 | 2 | 1 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | 85 | — | — | 10 | |
Swell 3 Height (m) Direction Period (s) | — | W 12 | W 12 | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 3 | 3 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SE 2 | ESE 3 | — | SW 4 | WSW 7 | WSW 7 | WSW 7 | SW 6 | WSW 7 | — | — | WSW 9 | WSW 8 | WSW 9 | WSW 10 | WSW 7 | WSW 7 | W 7 | — |
— | 1 | 3 | — | 14 | 326 | 344 | 241 | 116 | 99 | — | — | 300 | 441 | 863 | 683 | 375 | 208 | 155 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 401 | 394 | 394 | 182 | 152 | 144 | 308 | 111 | 183 | 320 | 49 | 67 | 103 | 49 | 278 | 320 | 584 | 48 | 308 | 79 |
Best forecast wave conditions in Wales - Gower | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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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.











