Surf Forecasts:
The Boiler surf forecast from 16 Aug 2026:
- Best quality surf: Friday 21 Aug, 1AM (local time) - 2.5ft (0.7m), 8s period, W swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 1AM (local time) - 5ft (1.6m), 7s period, W swell with 269 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 1AM (local time) - 2.5ft (0.7m), 8s 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 Friday (Aug 21) at 1AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.1m and 14s. 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 7s and forecast to arrive on Thursday (Aug 20) at 1AM. 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 3s period and expected on Saturday (Aug 22) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 21st Aug) | 2.5ft (0.7m) 8s |
| Best Surf | 1AM (Fri 21st Aug) | 2.5ft (0.7m) 8s |
| Most Powerful | 1AM (Thu 20th Aug) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what we've got for The Boiler over the next couple of weeks.
Honestly, this is a tough one. I'm looking at the whole 16-day window and, to put it bluntly, there's nothing that's going to get me out of bed in a hurry. We've got a long stretch of small, weak, and messy conditions. The first few days are a write-off, and it doesn't really get any better. The water temperature is running a massive 8°F warmer than normal, sitting at 70°F, so at least you won't freeze waiting for a wave that never comes.
The Boiler is an inconsistent reef break, and this forecast shows exactly why. It's a fairly exposed spot, and it needs a decent SW swell to work, but the swell we're seeing is small, mostly from the W, and with short periods. The energy is weak, with the combined swell energy barely cracking 100 (102) on the morning of the 18th, and even then the wind is up. That's the best of a bad bunch, and it's not saying much. For the rest of the first week and into the second, it's all cross-shore wind or small, weak pulses with no power. We're looking at combined energy values of 29, 19, 27... all well under 100.
For a brief moment on the morning of Friday the 21st, we get a glassy wind from the NE with a 2ft swell from the W, period of 9 seconds. That's the cleanest the conditions will look, but the energy is still very weak (74) and the swell is tiny. It's surfable, but barely. After that, the swell drops even further, with periods getting longer but the heights disappearing. From the 23rd onward, we're looking at 0.7ft or 0.3ft swells with very long periods of 14 seconds. That's a lot of ocean movement but zero push for a wave. The winds turn strong offshore from the ENE on the 24th, but with no swell, it's just a windy day on dry land.
There are a few mornings towards the end of the month that look clean with offshore or cross-off winds, like the 26th and 27th, but again, the swell is either tiny (0.7ft to 2ft) or the energy is in the 10-50 range. There's just no power to work with. The afternoon of the 28th goes glassy again with a 2ft WSW swell, but it's the same story: no juice.
So, if you're desperate, the morning of the 21st is your best bet for a clean-ish, knee-high wave, but that's the only real standout, and even then it's a stretch. This is one of those stretches where the forecast is what it is. It’s a blank run for The Boiler. Don't bother getting the wax out just yet.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 20°C on Mon morning, min 14°C on Sat night). Winds increasing (calm on Sun morning, fresh winds from the W by Tue afternoon). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Tue night. Very mild (max 19°C on Fri afternoon, min 14°C on Tue night). Winds decreasing (fresh winds from the W on Wed morning, light winds from the N by Thu night). | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 | WSW 7 | WSW 7 | WSW 5 | W 5 | W 7 | W 7 | W 6 | WSW 6 | W 6 | WSW 6 | W 7 | W 7 | W 7 | W 8 | W 9 | WSW 9 | W 8 | WSW 8 | WSW 8 | WSW 10 |
Wave Graph | |||||||||||||||||||||
18 | 10 | 10 | 7 | 34 | 39 | 130 | 92 | 50 | 79 | 135 | 269 | 146 | 103 | 68 | 39 | 26 | 23 | 13 | 14 | 18 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | cross | cross | cross-on | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | off | off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 9:37AM9.39m | 9:51PM9.46m | 10:10AM9.04m | 10:23PM9.02m | 10:41AM8.59m | 10:55PM8.48m | 11:12AM8.06m | 11:28PM7.89m | 11:51AM7.51m | 00:13AM7.29m | 12:49PM7.00m | 1:23AM6.79m | 2:19PM6.75m | 2:58AM6.69m | |||||||
Low Tide | 3:34PM1.13m | 3:57AM1.32m | 4:04PM1.48m | 4:25AM1.75m | 4:35PM1.94m | 4:54AM2.27m | 5:08PM2.48m | 5:28AM2.83m | 5:52PM3.08m | 6:17AM3.42m | 7:01PM3.61m | 7:43AM3.84m | 8:36PM3.79m | ||||||||
6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | |
— | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | |
mm | — | — | — | — | — | 1 | — | — | 6 | 1 | — | 2 | — | — | — | — | — | 2 | 1 | — | 7 |
Temp °C | 17 | 18 | 17 | 20 | 19 | 18 | 19 | 18 | 17 | 17 | 17 | 17 | 17 | 18 | 16 | 17 | 19 | 14 | 14 | 14 | 13 |
Feels °C | 15 | 14 | 15 | 18 | 16 | 17 | 17 | 13 | 15 | 10 | 10 | 12 | 12 | 12 | 13 | 15 | 16 | 10 | 8 | 7 | 8 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | WSW 7 | WSW 7 | WSW 5 | W 18 | — | W 7 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | W 7 | SW 14 | W 8 | W 9 | WSW 9 | W 8 | WSW 8 | WSW 8 | WSW 10 |
18 | 10 | 10 | 7 | 6 | — | 130 | 11 | 12 | 11 | 10 | 10 | 146 | 8 | 68 | 39 | 26 | 23 | 13 | 14 | 18 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | WSW 7 | — | — | SW 16 | — | W 17 | — | — | SW 16 | SW 15 | SW 14 | SW 14 | — | SW 13 | SW 16 | WSW 11 | WSW 10 | SW 15 |
— | — | — | 5 | — | — | 11 | — | 6 | — | — | 10 | 8 | 8 | 8 | — | 7 | 10 | 11 | 10 | 8 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 16 | W 12 | SW 15 | SW 15 | SW 15 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 10 | 3 | 9 | 9 | 8 | |
Wind waves Height (m) Direction Period (s) | — | — | W 3 | — | W 5 | W 7 | — | W 6 | WSW 6 | W 6 | WSW 6 | W 7 | — | W 7 | NNW 3 | NNW 3 | — | — | E 3 | ESE 3 | ENE 3 |
— | — | 2 | — | 34 | 39 | — | 92 | 50 | 79 | 135 | 269 | — | 103 | 5 | 1 | — | — | 5 | 3 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 288 | 421 | 223 | 318 | 320 | 412 | 318 | 320 | 320 | 360 | 387 | 360 | 360 | 308 | 0 | 190 | 190 | 190 | 205 | 159 | 72 |
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)
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.











