Surf Forecasts:
The Boiler surf forecast from 14 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 10PM (local time) - 3.5ft (1.0m), 6s period, W swell with cross-offshore winds.
- Most powerful swell: Tuesday 18 Aug, 4AM (local time) - 5ft (1.5m), 6s period, W swell with 176 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 10PM (local time) - 3.5ft (1.0m), 6s 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 Wednesday (Aug 19) at 10PM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.1m and 16s. 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 1.5m 6s and forecast to arrive on Tuesday (Aug 18) at 4AM. 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 3s period and expected on Saturday (Aug 15) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Wed 19th Aug) | 3.5ft (1.0m) 6s |
| Best Surf | 10PM (Wed 19th Aug) | 3.5ft (1.0m) 6s |
| Most Powerful | 4AM (Tue 18th Aug) | 5ft (1.5m) 6s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s talk about what’s happening at The Boiler over the next couple of weeks.
To be straight with you, the surf forecast is a long, quiet run with very little to get excited about. The water is sitting at 69° – that’s a whopping 8° warmer than usual for this time of year, which is really unusual. It’s like a warm bath out there, but that’s about the only thing that’s out of the ordinary.
From Friday 14 August right through until late on Thursday 27 August, the swell is tiny and weak. We’re looking at waves mostly between 0.3 ft and 5 ft, with combined swell energy values that are all under 200 (most are below 100, with the highest reading only 159 on the 19th). That’s weak energy, no doubt about it. The swell direction is consistently from the WSW or W, but the periods are short – mostly 4 to 9 seconds – so the waves are going to be soft and gutless. The surf quality is poor throughout this stretch. There’s a morning on Sunday 16 August that goes glassy (1.0 ft, WSW, 7s), which would be pretty, but you’d be struggling to get a ride. The Boiler is an inconsistent reef break, and it’s not firing at all.
The wind does offer some cleaner windows, especially on the mornings of the 15th, 21st, and 22nd with offshore or cross-off breezes, and the 26th morning has a light offshore too. But the swell just isn’t there to back it up. The water’s warm, but it’s a waiting game.
Then, at the very end of the forecast, things get serious. On Friday 28 August morning, the swell jumps to 13 ft from the WSW with a 12-second period, and the combined energy hits 4607 – that’s very strong energy. The wind is offshore from the ENE at 25 mph, and the conditions are described as clean. The afternoon pushes even bigger: 15 ft, same direction, period 12 seconds, energy 5334. Saturday 29 August morning is still big at 12 ft (WSW, 10s, energy 2205) with a moderate offshore from the NNE. This is a true standout for expert surfers only – the swell is well over 8 ft, so it’s too big for beginners and even intermediates. The long period (12s) means it’s a groundswell, and at a reef break like The Boiler, that can produce some powerful, well-shaped waves. But it’s a long way off, so keep an eye on the forecasts. The afternoon of the 29th drops to 10 ft with a cross-off wind, but the quality is rated as marginal.
So, the best on offer is clearly the big swell on Friday 28 August and Saturday 29 August. If you’re an experienced surfer and you can handle heavy, clean surf, that’s your window. The rest of the 16 days is a flat, quiet stretch with nothing to recommend.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Fri afternoon, min 13°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Very mild (max 19°C on Mon morning, min 14°C on Tue night). Winds decreasing (fresh winds from the W on Tue afternoon, light winds from the NNE by Wed night). | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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 9 | WSW 9 | W 8 | WSW 8 | W 7 | W 7 | WSW 7 | W 7 | W 7 | WSW 4 | WSW 4 | WSW 6 | W 7 | WSW 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 7 | WSW 8 |
Wave Graph | |||||||||||||||||||||
84 | 45 | 46 | 22 | 28 | 28 | 11 | 27 | 9 | 6 | 27 | 130 | 126 | 108 | 92 | 148 | 135 | 62 | 51 | 25 | 14 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | off | off | cross-off | off | glassy | cross | cross | cross | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | off |
High Tide | 8:38PM9.89m | 9:01AM9.60m | 9:16PM9.76m | 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 | ||||||||
Low Tide | 2:23PM0.87m | 2:52AM0.81m | 3:01PM0.92m | 3:27AM0.99m | 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 | ||||||||
5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | |
— | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — |
Temp °C | 21 | 22 | 18 | 20 | 20 | 15 | 18 | 18 | 17 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 18 | 17 | 17 | 16 | 14 |
Feels °C | 20 | 21 | 17 | 16 | 15 | 10 | 15 | 15 | 19 | 17 | 15 | 15 | 13 | 13 | 14 | 13 | 13 | 15 | 13 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 9 | W 8 | WSW 8 | W 7 | W 7 | WSW 7 | W 7 | WSW 7 | WSW 7 | W 8 | — | W 7 | SW 17 | SW 17 | SW 16 | SW 16 | W 6 | W 6 | W 7 | WSW 8 |
84 | 45 | 46 | 22 | 28 | 28 | 11 | 9 | 5 | 5 | 6 | — | 126 | 11 | 12 | 11 | 10 | 62 | 51 | 25 | 14 | |
Swell 2 Height (m) Direction Period (s) | — | — | W 11 | WSW 8 | — | WNW 4 | — | — | W 7 | — | — | — | W 16 | — | — | — | — | SW 16 | SW 15 | SW 14 | W 5 |
— | — | 2 | 6 | — | 1 | — | — | 9 | — | — | — | 5 | — | — | — | — | 10 | 8 | 8 | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SW 14 |
— | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 8 | |
Wind waves Height (m) Direction Period (s) | — | — | WNW 4 | NW 3 | NW 3 | NNW 3 | — | W 7 | W 5 | WSW 4 | WSW 4 | WSW 6 | — | WSW 6 | W 6 | W 6 | W 6 | — | — | NW 3 | NNW 3 |
— | — | 5 | 2 | 6 | 2 | — | 27 | 4 | 6 | 27 | 130 | — | 108 | 92 | 148 | 135 | — | — | 3 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 133 | 190 | 397 | 412 | 20 | 315 | 423 | 232 | 426 | 477 | 320 | 63 | 360 | 318 | 190 | 19 | 0 | 18 | 190 | 20 |
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.











