Surf Forecasts:
The Boiler surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 7s period, W swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 7AM (local time) - 5ft (1.6m), 8s period, WSW swell with 266 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 7s period with W 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 Thursday (Aug 20) at 10PM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.6m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at The Boiler in the next 16 days are 1.6m 8s and forecast to arrive on Thursday (Aug 20) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Thursday (Aug 20) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 20th Aug) | 3ft (0.9m) 7s |
| Best Surf | 10PM (Thu 20th Aug) | 3ft (0.9m) 7s |
| Most Powerful | 7AM (Thu 20th Aug) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright mate, Rusty here. Let's have a look at what's on the cards for The Boiler over the next couple of weeks.
We're looking at a pretty quiet stretch ahead, with a lot of small, weak swell and the occasional burst of larger, but messy, energy. The water temp is sitting about average for the time of year, nothing unusual there.
The good news is it's not all bad. The standout window is shaping up to be Friday, the 21st of August. The morning session is your best bet. We've got a clean, offshore N wind at 10 km/h, and while the swell is small at 2 ft from the WSW, it's the only time the stars align for a surfable wave, even if it's just ordinary. The combined energy is weak (70), so you'll be working for what you get, but it'll be clean.
After that, things go flat and quiet. The next couple of days see tiny waves with glassy conditions, but the swell is just too small to do anything with. We then cop a few days of strong cross-shore winds and messy chop, with the swell staying small. The Boiler can be inconsistent, and this is one of those runs.
We get a slight bump in energy around the 28th and 29th of August, with swell heights around 5 ft, but the wind is a mess. On the 28th, it's onshore and lumpy, and on the 29th, it's a clean cross-off but the wind is a moderate breeze at 25 km/h. The combined energy is moderate (253 on the 29th morning) but with a short period of 8 seconds, the waves will lack shape.
The biggest swell of the period hits on the 31st of August, with a huge spike in energy (2273) and 8 ft swell from the WSW. It's a full-on stormy affair with onshore wind and chop. This is expert-only territory, and honestly, it looks more interesting for kite surfing than a clean paddle session.
The first week of September fizzles out again, with small, weak swell and poor conditions. So, to sum it up, Friday morning the 21st is your cleanest, most surfable window, even if it's small. The rest is a waiting game.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Wed night. Very mild (max 19°C on Sat afternoon, min 12°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue afternoon. Warm (max 25°C on Mon afternoon, min 13°C on Sat night). Winds increasing (calm on Sun afternoon, strong winds from the E by Mon night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 | W 7 | WSW 9 | WSW 8 | WSW 6 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 9 | WSW 10 | WSW 9 | E 4 | ESE 4 | SW 13 | ESE 4 | SW 9 | SW 4 | WSW 5 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 220 | 171 | 106 | 53 | 13 | 14 | 18 | 18 | 16 | 8 | 8 | 18 | 8 | 9 | 14 | 7 | 11 | 12 | 29 | 46 | 115 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | cross-off | cross-off | cross | cross-off | off | glassy | glassy | cross-off | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross |
High Tide | 11:51AM7.51m | 00:13AM7.29m | 12:49PM7.00m | 1:23AM6.79m | 2:19PM6.75m | 2:58AM6.69m | 3:48PM7.01m | 4:21AM7.06m | 4:55PM7.57m | 5:22AM7.63m | 5:45PM8.16m | 6:07AM8.18m | 6:26PM8.66m | ||||||||
Low Tide | 5:28AM2.83m | 5:52PM3.08m | 6:17AM3.42m | 7:01PM3.61m | 7:43AM3.84m | 8:36PM3.79m | 9:21AM3.79m | 10:00PM3.49m | 10:37AM3.32m | 11:04PM2.94m | 11:31AM2.75m | 11:52PM2.38m | 12:13PM2.23m | 00:32AM1.92m | |||||||
 | |  |  |  |  | | | | | | | | | | | |  | |  |  | |
 | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:15 | — |
mm | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 2 | 11 |
Temp °C | 17 | 18 | 14 | 16 | 17 | 14 | 17 | 19 | 16 | 18 | 21 | 19 | 22 | 25 | 20 | 18 | 17 | 18 | 20 | 22 | 18 |
Feels °C | 13 | 14 | 10 | 14 | 13 | 11 | 15 | 16 | 12 | 16 | 19 | 16 | 17 | 20 | 12 | 11 | 13 | 17 | 19 | 19 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | SW 14 | WSW 9 | WSW 8 | WSW 6 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 9 | WSW 10 | WSW 9 | SW 9 | SW 8 | W 8 | SW 8 | SW 9 | W 9 | W 12 | WSW 7 |
| kJ | 220 | 8 | 106 | 53 | 12 | 14 | 18 | 18 | 16 | 8 | 7 | 18 | 8 | 3 | 3 | 1 | 3 | 12 | 6 | 3 | 115 |
Swell 2 Height (m) Direction Period (s) | SW 15 | W 14 | SW 14 | SW 16 | WSW 8 | WNW 4 | SW 15 | SW 15 | — | SW 14 | SW 14 | SW 14 | SW 14 | W 9 | W 9 | SW 8 | W 8 | SSE 3 | W 13 | SW 9 | W 13 |
| kJ | 8 | 4 | 8 | 10 | 13 | 3 | 9 | 8 | — | 8 | 8 | 8 | 8 | 2 | 1 | 3 | 1 | 1 | 3 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | W 15 | — | SW 14 | SW 13 | SW 13 | W 6 | SW 15 | — | SW 15 | — | — | SW 14 | W 10 | SW 14 | SW 13 | SW 13 | SW 13 | W 8 | — | — | — |
| kJ | 4 | — | 8 | 7 | 7 | 2 | 9 | — | 8 | — | — | 8 | 2 | 8 | 7 | 7 | 7 | 1 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | W 7 | NW 4 | NW 4 | WNW 4 | — | — | — | — | — | — | — | E 3 | E 4 | ESE 4 | E 3 | ESE 4 | SW 2 | SW 4 | WSW 5 | — |
| kJ | — | 171 | 4 | 3 | 5 | — | — | — | — | — | — | — | 2 | 9 | 14 | 5 | 11 | 1 | 29 | 46 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 421 | 320 | 0 | 0 | 262 | 20 | 20 | 126 | 20 | 72 | 189 | 51 | 394 | 83 | 324 | 262 | 162 | 135 | 262 | 181 | 1 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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