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, 4PM (local time) - 3.5ft (1.0m), 10s period, WSW swell with 214 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 with a secondary swell of 0.3m and 3s. 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 1.0m 10s and forecast to arrive on Thursday (Aug 13) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Aug 18) at 4PM.
| 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 | 4PM (Thu 13th Aug) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright boys and girls, let’s get into it. The Boiler’s been quiet, but there are a couple of moments that’ll make it worth the drive. Right now the water is sitting at 68° – about 7° warmer than normal for this time of year. That’s a real bonus.
We’ve got nothing going on Tuesday and Wednesday. Flat and messy, waves around 0.5 to 2 feet, cross-onshore breeze chopping it all up. Not worth the effort.
Thursday the 13th, there’s a small clean pulse – 3 feet of WSW swell, light offshore, glassy in the morning. It’s weak, only 149 energy units, but if you’re itching, there’s a peak to be had. Goes to mush that afternoon as the wind swings on.
Friday and the weekend are meh. Some clean 2-foot waves, but no push. Sunday’s flat as a lake – just 1 feet and glassy.
Then things wake up on Tuesday the 18th. Four feet of clean W swell, offshore wind, energy at 136. It’s a start. But Wednesday the 19th is the one: 5 feet of W groundswell, offshore, with energy jumping to 280. That’s your standout. Clean faces, proper reef wrap, and a bit of size. A few of us will be out, so don't expect an empty lineup.
Thursday the 20th goes overhead – 7 feet – but the wind goes onshore and it’s all over the place. That’s big, heavy, and only for the brave. The 21st fades to a weak 3 feet with a 6-second period – fat and gutless.
From there it’s mostly skunked until the 23rd when we see 7 feet again, but it’s cross-onshore and messy. Stick with Wednesday the 19th – that’s your session. Just know the longer period can make a reef like this a bit tricky, but it’ll hold its shape.
Stay salty,
Rusty
Short Range ForecastMostly dry. Warm (max 31°C on Wed afternoon, min 17°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the W by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 22°C on Fri morning, min 12°C on Sat 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 9 | WSW 8 | WSW 7 | W 7 | W 8 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 7 | 25 | 58 | 74 | 86 | 149 | 214 | 98 | 84 | 76 | 67 | 57 | 54 | 29 | 18 | 10 | 5 | 9 | 5 | 66 |
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 | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | glassy | cross | cross-off | cross | cross-on | 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 | 5 | 8 | — |
Temp °C | 23 | 26 | 23 | 27 | 31 | 27 | 27 | 26 | 19 | 22 | 22 | 17 | 21 | 21 | 14 | 17 | 18 | 16 | 17 | 18 | 18 |
Feels °C | 22 | 24 | 21 | 23 | 27 | 26 | 23 | 22 | 18 | 20 | 20 | 14 | 17 | 16 | 10 | 14 | 14 | 14 | 17 | 16 | 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 | WSW 8 | WSW 7 | W 7 | W 8 | WSW 7 | WSW 7 | W 4 | WSW 7 | WSW 7 | WSW 6 |
| kJ | 2 | 7 | 25 | 58 | 74 | 86 | 149 | — | 98 | 84 | 76 | 67 | 57 | 54 | 29 | 18 | 10 | 3 | 9 | 5 | 66 |
Swell 2 Height (m) Direction Period (s) | W 8 | SW 6 | W 9 | SW 6 | — | S 3 | — | — | — | — | — | WSW 8 | W 10 | — | — | — | — | WSW 7 | — | — | — |
| kJ | 5 | 2 | 2 | 1 | — | 1 | — | — | — | — | — | 21 | 2 | — | — | — | — | 5 | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 10 | W 13 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 9 | — |
| kJ | 2 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — |
Wind waves Height (m) Direction Period (s) | ESE 2 | ESE 2 | — | — | SE 3 | — | — | WSW 10 | WSW 4 | — | — | NNW 3 | NNW 3 | NNW 3 | NNW 3 | — | WSW 5 | — | — | — | — |
| kJ | 1 | 1 | — | — | 2 | — | — | 214 | 4 | — | — | 2 | 2 | 5 | 2 | — | 9 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 398 | 340 | 20 | 20 | 13 | 0 | 0 | 360 | 0 | 133 | 19 | 0 | 190 | 190 | 20 | 189 | 398 | 423 | 365 | 368 | 141 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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