Surf Forecasts:
The Boiler surf forecast from 26 Aug 2026:
- Best quality surf: Monday 31 Aug, 1AM (local time) - 4.5ft (1.3m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Saturday 29 Aug, 10PM (local time) - 10ft (3.0m), 9s period, WSW swell with 1,354 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 1AM (local time) - 4.5ft (1.3m), 8s 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 Monday (Aug 31) at 1AM. The primary swell is predicted to be 1.3m and 8s period. 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 3.0m 9s and forecast to arrive on Saturday (Aug 29) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Thursday (Aug 27) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 31st Aug) | 4.5ft (1.3m) 8s |
| Best Surf | 1AM (Mon 31st Aug) | 4.5ft (1.3m) 8s |
| Most Powerful | 10PM (Sat 29th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Well, I gotta be straight with you – this outlook is a tough one to swallow. The Boiler is a reef setup that’s inconsistent at the best of times, and for the next 16 days, it’s looking like a real struggle. There’s a long stretch of nothing worthwhile on the cards, with the first real glimmer of hope not showing up until Saturday, the 5th of September. Before that, it’s just a whole lot of wind-ruined, small, or messy conditions.
The Boiler is a reef break, and it fires best with a solid SW swell. The problem is, for the first week and a half, the wind is just relentless. From Wednesday the 26th of August right through to Friday the 4th of September, it’s a constant battle with cross-onshore winds, often fresh to strong, making the surf choppy and blown out. The swell is mostly small – under 3 ft – and the combined energy is weak, sitting in the double digits, like 19 (weak energy) on the 26th. On the 28th and 29th of August, a bigger swell (6 ft to 8 ft) shows up, but it’s accompanied by a near gale wind, making it a total mess. That’s not a surf session, that’s a survival test.
The only session that even looks rideable is the early morning of Saturday, the 5th of September. We’ve got a moderate offshore wind from the N, with small 3 ft swell from the WSW. The energy is still weak (122), but the wind is clean. It’s not a standout, but it’s the only wave on offer that won’t leave you feeling like you’ve been in a washing machine.
Then, the week of the 7th of September brings a massive surge of energy. On Monday the 7th of September, the combined energy hits a massive 2124 (very strong wave energy) with a 10 ft swell from the WSW. But the wind is onshore and strong again, so it’s going to be a lumpy, dangerous wall of water. That’s big enough for experts only, and the onshore wind will make it a close-out. The following morning, Tuesday the 8th, has a much cleaner cross-offshore wind, but the swell has dropped back to 4 ft.
The single best session of the whole 16-day window might actually be Wednesday morning, the 9th of September. Glassy conditions, a light S wind, and a 2 ft swell. The wave energy is weak (70), but glassy conditions over a reef break are a rare treat. For a patient soul on a log, that could be a magical hour.
So, if you’re desperate, keep your eye on the 5th of September for a small, clean wave, and the 9th of September for a glassy dawn patrol. Everything else? Leave the board in the car and have a cold one.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Thu morning. Warm (max 23°C on Wed afternoon, min 17°C on Tue night). Winds increasing (light winds from the ESE on Tue night, fresh winds from the SW by Fri afternoon). | Days 4-6 Weather SummaryHeavy rain (total 25mm), heaviest during Fri night. Very mild (max 19°C on Sat morning, min 14°C on Sun night). Winds decreasing (near gales from the SW on Sat morning, light winds from the WNW by Sun night). | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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 8 | W 8 | W 7 | WSW 4 | SW 5 | SW 6 | WSW 6 | SW 5 | SW 7 | SW 8 | WSW 9 | WSW 10 | WSW 9 | WSW 8 | W 8 | WSW 8 | W 8 | WSW 8 | WSW 8 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 14 | 12 | 10 | 10 | 11 | 70 | 229 | 144 | 67 | 208 | 689 | 1230 | 491 | 237 | 212 | 349 | 215 | 323 | 385 | 291 | 176 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | on | cross-on | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on |
High Tide | 6:07AM8.18m | 6:26PM8.66m | 6:45AM8.62m | 7:02PM9.05m | 7:20AM8.96m | 7:36PM9.33m | 7:53AM9.20m | 8:09PM9.52m | 8:25AM9.34m | 8:42PM9.58m | 8:57AM9.36m | 9:15PM9.49m | 9:28AM9.22m | 9:48PM9.24m | |||||||
Low Tide | 12:13PM2.23m | 00:32AM1.92m | 12:49PM1.83m | 1:08AM1.55m | 1:22PM1.53m | 1:41AM1.29m | 1:53PM1.31m | 2:12AM1.13m | 2:23PM1.21m | 2:43AM1.09m | 2:54PM1.23m | 3:14AM1.21m | 3:24PM1.39m | 3:45AM1.48m | |||||||
 | |  |  |  |  |  |  |  | |  | |  | |  | | | | | | | |
 | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — |
 | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:06 | — | — | 8:02 | — |
mm | — | — | 1 | 15 | — | — | 1 | 2 | 8 | 4 | — | — | 4 | 7 | 2 | — | — | 3 | 1 | — | 2 |
Temp °C | 20 | 23 | 20 | 17 | 18 | 17 | 17 | 18 | 17 | 19 | 18 | 17 | 18 | 17 | 16 | 16 | 17 | 17 | 17 | 17 | 18 |
Feels °C | 20 | 22 | 19 | 16 | 15 | 16 | 13 | 16 | 14 | 14 | 11 | 11 | 15 | 12 | 13 | 11 | 12 | 13 | 15 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 8 | W 8 | W 7 | — | W 8 | W 8 | — | W 8 | — | — | — | WSW 10 | WSW 9 | WSW 8 | — | W 11 | W 8 | — | — | WSW 8 |
| kJ | 14 | 12 | 10 | 10 | — | 1 | 1 | — | 1 | — | — | — | 491 | 237 | 212 | — | 10 | 323 | — | — | 176 |
Swell 2 Height (m) Direction Period (s) | SW 8 | — | SW 7 | S 6 | — | W 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 |
| kJ | 2 | — | 2 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 |
Swell 3 Height (m) Direction Period (s) | W 13 | SW 7 | — | W 12 | — | W 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 3 | 2 | — | 3 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | E 3 | WSW 4 | SW 5 | SW 6 | WSW 6 | SW 5 | SW 7 | SW 8 | WSW 9 | — | SSW 3 | — | W 8 | WSW 8 | — | WSW 8 | WSW 8 | — |
| kJ | — | — | — | 5 | 11 | 70 | 229 | 144 | 67 | 208 | 689 | 1230 | — | 3 | — | 349 | 215 | — | 385 | 291 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 71 | 401 | 335 | 182 | 182 | 74 | 147 | 144 | 401 | 394 | 204 | 133 | 82 | 278 | 0 | 360 | 178 | 67 | 111 | 133 | 224 |
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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