
Surf Forecasts:
The Boiler surf forecast from 8 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 1PM (local time) - 3ft (0.9m), 10s period, WSW swell with 146 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 0.2m and 3s. Another secondary swell of 0.2m and 3s is also forecast. 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 0.9m 10s and forecast to arrive on Thursday (Aug 13) at 1PM. 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 5s period and expected on Friday (Aug 14) 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 | 1PM (Thu 13th Aug) | 3ft (0.9m) 10s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it. It’s a pretty quiet run for the most part here at The Boiler, but we’ve got one real window of opportunity shaping up if you’re patient.
The Big Picture
We’re looking at a long stretch of tiny, weak waves over the next week and a half. The swell energy is mostly low, with values ranging from 2 to 80 on the energy scale, so don’t expect much push. The winds are a mixed bag, but a few clean windows do pop up. The standout moment is a solid pulse of clean swell arriving around Tuesday the 18th of August, which is the one to circle on the calendar. For now, the water temp is nothing unusual – just your average for this time of year.
The Day-by-Day
Starting off Saturday the 8th of August, it’s flat and forgettable. Tiny 0.3 ft west swell with a period of 9 seconds, and the morning is choppy with a cross-onshore wind. The afternoon goes glassy, but the swell is too small to ride. This pattern holds through Sunday the 9th and Monday the 10th – nothing over 0.7 ft. Monday afternoon does clean up nicely with a cross-offshore breeze, but it’s still just knee-high dribble. The combined energy is only 10 on Monday afternoon, so you’re mostly bobbing around.
Tuesday the 11th and Wednesday the 12th stay small, with some bumpy conditions from an ESE wind. The combined energy climbs to 80 by Wednesday afternoon, but that’s still weak, and the cross-onshore wind chops it up. Not worth paddling out.
Thursday the 13th offers a glimmer. The morning goes glassy with a 3 ft swell from the WSW (period 9 seconds), and the energy jumps to 112 – moderate now. The conditions are described as “surfable but very ordinary,” so you might get a few little ones if you’re keen, but it’s not pretty.
Friday the 14th through Monday the 17th of August sees a lot of clean, cross-offshore mornings, but the swell stays small, bouncing between 1 ft and 2 ft. The energy is mostly below 100 again. The afternoon of the 17th gets a bit more push, with 4 ft WSW swell and 138 combined energy, but the wind is a fresh cross-shore, making it lumpy and messy. Not recommended.
The Main Event – Tuesday the 18th of August
Alright, this is the one. Tuesday morning has 6 ft of WSW swell, period 8 seconds, and the combined energy is a solid 390 – that’s a big jump, strong wave energy. The wind is a light cross-offshore from the NW, keeping the surface clean. This is the best surf on offer in the whole 16-day window. The afternoon stays clean with a moderate cross-offshore, and the swell holds at 6 ft, energy at 412. For a reef break, that’s a proper size, good for intermediate and up. The swell direction is SW, which is the optimum for The Boiler, so it should line up nicely. Expect some crowds, though – this spot can get busy when it’s good.
The Long Range
After that, it drops off fast. Wednesday the 19th and Thursday the 20th are back to tiny, clean conditions. By Friday the 21st of August, we get a pulse of 4 ft to 5 ft WSW swell, but the wind is onshore or cross-shore, and the period is short (5-6 seconds), so it’s going to be a sloppy, messy wave. The energy is moderate (155), but the quality is poor. Saturday the 22nd is similar, with 4 ft to 4 ft of short-period swell and cross-shore chop. Sunday the 23rd of August finishes with a clean offshore wind, but the swell is down to 2 ft and weak.
Bottom Line
If you’ve got a window, aim for the morning of Tuesday the 18th of August. That’s the standout. The rest of the run is a whole lot of waiting. Nature of the spot – it’s inconsistent, and this looks like a typical blank spell in between pulses.
Stay wet, stay patient.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Mon afternoon, min 14°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Wed afternoon, min 16°C on Tue night). Winds decreasing (fresh winds from the ESE on Wed morning, calm by Wed night). | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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 9 | W 9 | WSW 7 | WSW 7 | W 8 | W 3 | WSW 6 | W 5 | WSW 7 | ESE 3 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | WSW 9 | W 9 | W 8 |
Wave Graph | |||||||||||||||||||||
2 | 2 | 5 | 4 | 2 | 1 | 4 | 4 | 4 | 4 | 7 | 25 | 58 | 74 | 84 | 88 | 102 | 120 | 84 | 39 | 33 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross-on | cross-on | glassy | glassy | cross | cross-off | cross-off | cross-off | off |
High Tide | 2:26PM7.40m | 3:17AM7.49m | 3:58PM7.72m | 4:41AM7.93m | 5:13PM8.36m | 5:50AM8.55m | 6:15PM9.02m | 6:47AM9.10m | 7:08PM9.53m | 7:37AM9.48m | 7:55PM9.82m | 8:21AM9.64m | 8:38PM9.89m | ||||||||
Low Tide | 7:54AM3.09m | 8:47PM3.09m | 9:32AM2.97m | 10:18PM2.69m | 10:52AM2.46m | 11:32PM2.07m | 11:58AM1.85m | 00:33AM1.47m | 12:53PM1.33m | 1:26AM1.04m | 1:41PM1.00m | 2:12AM0.82m | 2:23PM0.87m | 2:52AM0.81m | |||||||
5:48 | — | — | 5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | |
— | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 21 | 19 | 20 | 20 | 18 | 21 | 24 | 23 | 23 | 28 | 23 | 26 | 29 | 24 | 25 | 27 | 20 | 21 | 21 | 16 |
Feels °C | 18 | 19 | 16 | 16 | 16 | 17 | 19 | 20 | 19 | 19 | 25 | 21 | 21 | 25 | 22 | 22 | 23 | 18 | 18 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | WSW 7 | WSW 7 | SW 6 | W 3 | W 4 | WSW 6 | WSW 7 | SW 7 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | WSW 9 | W 9 | W 8 |
2 | 2 | 5 | 4 | 2 | 1 | 3 | 4 | 4 | 2 | 7 | 25 | 58 | 74 | 84 | 88 | 102 | 120 | 84 | 39 | 33 | |
Swell 2 Height (m) Direction Period (s) | — | SW 8 | W 9 | W 8 | W 8 | SW 6 | WSW 6 | W 8 | W 4 | W 8 | SW 6 | W 9 | W 6 | W 6 | WSW 3 | WSW 11 | — | — | — | — | — |
— | 2 | 2 | 1 | 1 | 1 | 4 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 1 | 24 | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 8 | W 8 | W 8 | — | W 10 | W 13 | SW 6 | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | 1 | 1 | 1 | — | 2 | 3 | 1 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | WSW 2 | WNW 3 | — | W 5 | — | ESE 3 | SE 3 | SE 3 | ESE 3 | SE 3 | — | — | WSW 2 | NNW 3 | — | W 5 | NNW 3 |
— | — | — | — | 1 | 2 | — | 4 | — | 4 | 2 | 4 | 9 | 5 | — | — | 1 | 1 | — | 18 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 324 | 324 | 189 | 189 | 360 | 189 | 134 | 189 | 189 | 393 | 361 | 20 | 45 | 19 | 0 | 0 | 136 | 0 | 0 | 412 | 72 |
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.











