
Surf Forecasts:
The Boiler surf forecast from 11 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 13 Aug, 7PM (local time) - 3.5ft (1.1m), 10s period, WSW swell with 250 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 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 Wednesday (Aug 12) at 10PM. The primary swell is predicted to be 0.7m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at The Boiler in the next 16 days are 1.1m 10s and forecast to arrive on Thursday (Aug 13) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Aug 15) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 10PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 7PM (Thu 13th Aug) | 3.5ft (1.1m) 10s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, let's get into it. It’s Rusty.
The next couple of weeks are a real mixed bag. We start off pretty flat, get a few tiny pulses that are barely worth the effort, and then there’s one big, powerful swell that shows up late next week. That’s the one to circle on the calendar, but it’s going to be a beast.
Right now, looking at The Boiler, it’s pretty bleak. Tuesday the 11th is just about flat, with a tiny 0.2 foot west swell and weak, short-period energy. The wind’s cross-onshore from the ESE at 25 km/h, making it choppy and just plain messy. Not worth wetting a wetsuit. Wednesday picks up a touch, but we’re still under 2 feet and the wind stays onshore. It’s all pretty junky. The wave energy is weak – it’s just not there.
Thursday the 13th is where things start to perk up a little. The swell bumps up to about 3 feet from the WSW, and the wind swings offshore from the west at a light 10 km/h. This is the first time we see some cleaner conditions. The energy gets into the moderate range. It’s surfable, but it’s still gutless. Get on a fish or a log and you might find a few fun ones. The afternoon gets blown out with a fresh 30 km/h cross-offshore, so your window is early.
Friday and the weekend, we drop back again. Swell shrinks to around 2 feet or less. There’s a bit of offshore wind on Saturday morning, but it’s tiny. The period is short, which means it’s not going to have any push. And The Boiler is an inconsistent reef. When it’s this small, you’ll be waiting a long time between waves, and most of them won’t be worth the paddle. It’s a spot that needs proper swell to show its charm, and it’s just not there yet.
Monday the 17th gives us another little clean window in the afternoon – glassy conditions on a small west swell. But again, it’s small, weak windswell. Low expectations.
Then we go quiet again until Sunday the 23rd. The swell magnet starts to shake with a jump to around 5 feet from the SW. The energy numbers start climbing into the strong range. But the wind is not kind, it’s a cross-shore wind, so it’ll be lumpy and full of chop. The period is a short 9 seconds, so still a bit soft.
But then we get to the standout. Monday the 24th of August. This is when the ocean finally wakes up. We’re looking at a solid 10 feet of swell from the WSW, with a period of 10 seconds. The wind is forecast to be a strong cross-offshore from the WNW at 45 km/h, which will be blowing hard, but holding the waves open. The energy is massive – off the charts. This is a serious, powerful swell. This is not a beginner wave. This is well into expert-only territory. The Boiler will be a beast, with proper barrels on offer if you’ve got the skills and the guts. The WSW direction is right on the money for The Boiler’s ideal swell direction, too. The morning is looking like the cleanest window before the wind swings more cross-shore in the afternoon and it gets messy.
There’s another pulse on Tuesday the 25th, still big, but it’s on the way down, starting around 7 feet and it’s getting chopped up by a fresh cross-shore wind. It will still have power, but it won’t be as clean.
After that, we fade out quickly again, back down to under 3 feet by the 26th. So the story is simple: the next two weeks are mostly a waiting game. If you’re desperate, there are small, clean windows on the 13th and 17th. But the real swell, the one that’s worth waiting for, is that big pulse on the 24th. That one will be a handful, but it’s going to be the best and most serious surf on offer.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Wed afternoon, min 18°C on Tue morning). Winds increasing (calm on Wed night, fresh winds from the W by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 22°C on Fri afternoon, min 14°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 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) | W 8 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 9 | W 6 | W 8 | W 8 | W 7 | W 8 | WSW 7 | WSW 7 | WSW 5 | W 4 | W 7 | W 8 |
Wave Graph | |||||||||||||||||||||
5 | 7 | 25 | 58 | 74 | 94 | 146 | 214 | 98 | 84 | 44 | 84 | 58 | 39 | 29 | 18 | 18 | 5 | 10 | 74 | 78 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | cross | cross-off | off | off | cross-off | off | on | cross | off | cross-off | glassy | cross-off |
High Tide | 6:15PM9.02m | 6:47AM9.10m | 7:08PM9.53m | 7:37AM9.48m | 7:55PM9.82m | 8:21AM9.64m | 8:38PM9.89m | 9:01AM9.60m | 9:16PM9.76m | 9:37AM9.39m | 9:51PM9.46m | 10:10AM9.04m | 10:23PM9.02m | ||||||||
Low Tide | 11:58AM1.85m | 00:33AM1.47m | 12:53PM1.33m | 1:26AM1.04m | 1:41PM1.00m | 2:12AM0.82m | 2:23PM0.87m | 2:52AM0.81m | 3:01PM0.92m | 3:27AM0.99m | 3:34PM1.13m | 3:57AM1.32m | 4:04PM1.48m | ||||||||
5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | |
— | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — |
Temp °C | 23 | 26 | 23 | 27 | 31 | 26 | 27 | 25 | 19 | 21 | 22 | 16 | 19 | 21 | 16 | 18 | 17 | 15 | 16 | 18 | 16 |
Feels °C | 22 | 24 | 22 | 23 | 27 | 25 | 23 | 22 | 18 | 19 | 20 | 12 | 15 | 17 | 12 | 16 | 15 | 14 | 14 | 18 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 6 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 10 | — | WSW 10 | WSW 9 | W 9 | W 8 | W 8 | W 7 | W 8 | WSW 7 | WSW 7 | WSW 7 | W 4 | — | W 8 |
2 | 7 | 25 | 58 | 74 | 94 | 146 | — | 98 | 84 | 39 | 84 | 58 | 39 | 29 | 18 | 18 | 5 | 10 | — | 78 | |
Swell 2 Height (m) Direction Period (s) | W 8 | SW 6 | W 9 | — | — | — | — | — | — | — | — | WSW 8 | — | — | WSW 8 | — | — | W 7 | WSW 7 | — | — |
5 | 2 | 2 | — | — | — | — | — | — | — | — | 22 | — | — | 11 | — | — | 4 | 5 | — | — | |
Swell 3 Height (m) Direction Period (s) | W 10 | W 13 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 9 | — | — |
2 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | |
Wind waves Height (m) Direction Period (s) | ESE 2 | — | — | — | ESE 2 | — | — | WSW 10 | WSW 4 | — | W 6 | — | — | WNW 3 | NNW 3 | — | — | WSW 5 | — | W 7 | — |
1 | — | — | — | 1 | — | — | 214 | 4 | — | 44 | — | — | 1 | 2 | — | — | 4 | — | 74 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 340 | 426 | 20 | 20 | 13 | 0 | 0 | 360 | 0 | 0 | 96 | 0 | 14 | 190 | 14 | 189 | 434 | 318 | 20 | 0 | 0 |
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.











