Surf Forecasts:
The Boiler surf forecast from 25 Aug 2026:
- Most powerful swell: Saturday 29 Aug, 4PM (local time) - 10ft (3.0m), 9s period, WSW swell with 1,177 kJ wave energy.
Best Forecast Surf Conditions for The Boiler this week:
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 4PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Sat 29th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, let's get into it.
First up, the outlook for The Boiler, a reef break. Honestly, it’s a tough stretch of forecast right now. The spot is inconsistent at the best of times, and for the first week or more, the conditions are just not playing ball.
We’re looking at a real quiet start. The first recommendation doesn’t appear until Monday, August 31st, and even then it’s only a marginal call. For the first few days, from Tuesday the 25th right through to the end of August, it’s all pretty grim. The swell is tiny, the wind is messy, and you’d be fighting a losing battle. There’s a bit of a pulse Saturday the 29th with a 10ft swell from the WSW in the afternoon, but it’s paired with a nasty 19 mph cross-shore wind and the whole thing is lumpy. Not worth the paddle out.
Monday morning the 31st shows some hope with an 8ft swell from the west (1017 combined energy), and the wind finally goes clean and cross-offshore from the WNW at 22 mph. That's a solid groundswell period of 9 seconds, and the description says clean, which is what we want. But the overall forecast quality is only marginal, so it’s not a green light, just a heads-up.
Then it gets messy again. Strong winds, rain, and blown-out surf take us through the first few days of September.
Now, the real standout, and the only one I’d get excited about, is on Tuesday, September 8th. Tuesday morning at The Boiler is looking like the pick of the entire forecast. We’ve got a solid 5ft groundswell rolling in from the WSW with a very long period of 15 seconds (1165 combined energy). That’s a lot of deep ocean energy. The wind is light and offshore out of the north at just 6 mph, which is absolutely the kind of glassy, clean conditions you dream of. This is going to be well-shaped, powerful, and clean. The period is long enough that it will stand up nicely on this reef setup. However, keep in mind this is over a week away, so while it *looks* brilliant, there’s always a little less certainty that far out. If it holds, this is the one.
The water temp is about average for the time of year.
So, to sum it up: don't bother for the next week unless you’re desperate. Mark your calendar for Tuesday, September 8th. That’s the only true standout on offer.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Thu morning. Warm (max 23°C on Wed afternoon, min 15°C on Mon night). Winds decreasing (fresh winds from the E on Mon night, light winds from the ESE by Wed afternoon). | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Sat morning. Very mild (max 19°C on Sat afternoon, min 16°C on Thu night). Winds increasing (light winds from the W on Thu night, strong winds from the SW by Sun morning). | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | E 4 | W 10 | W 10 | W 9 | W 8 | W 8 | W 7 | W 7 | SW 8 | SW 7 | WSW 5 | WSW 6 | SW 6 | WSW 9 | WSW 8 | WSW 8 | WSW 7 | WSW 8 | W 9 | WSW 9 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 12 | 3 | 8 | 14 | 12 | 10 | 10 | 4 | 20 | 75 | 97 | 94 | 152 | 1177 | 277 | 199 | 407 | 850 | 1017 | 631 | 345 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross | on | cross | cross-on | cross-on | cross-on | cross | cross-off | cross | cross |
High Tide | 5:22AM7.63m | 5:45PM8.16m | 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 | |||||||
Low Tide | 11:31AM2.75m | 11:52PM2.38m | 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 | |||||||
 |  |  | |  |  |  |  |  | | | |  | |  | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 8:19 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:06 | — |
mm | — | — | — | — | — | 3 | 4 | 3 | 1 | — | — | 1 | 11 | — | — | 3 | 2 | 3 | — | 2 | 2 |
Temp °C | 20 | 22 | 20 | 19 | 23 | 20 | 18 | 20 | 17 | 18 | 18 | 17 | 18 | 19 | 17 | 17 | 17 | 16 | 16 | 17 | 17 |
Feels °C | 17 | 19 | 19 | 18 | 21 | 19 | 16 | 19 | 16 | 15 | 14 | 14 | 15 | 14 | 13 | 12 | 10 | 8 | 9 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 10 | W 9 | W 8 | W 8 | W 7 | W 7 | SW 8 | W 9 | W 8 | WSW 7 | — | — | W 8 | W 8 | — | — | — | — | WSW 10 |
| kJ | 1 | 1 | 8 | 14 | 12 | 10 | 10 | 4 | 20 | 1 | 1 | 18 | — | — | 217 | 111 | — | — | — | — | 102 |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 8 | SW 8 | SW 8 | SW 7 | S 7 | S 7 | — | W 7 | — | — | — | — | — | — | — | — | — | — | — | W 10 |
| kJ | 3 | 3 | 3 | 2 | 2 | 1 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 102 |
Swell 3 Height (m) Direction Period (s) | SW 13 | W 10 | W 13 | W 13 | W 12 | — | W 12 | S 6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 7 | 2 | 3 | 3 | 3 | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 4 | E 3 | SE 2 | — | — | — | — | — | SW 4 | SW 7 | WSW 5 | WSW 6 | SW 6 | WSW 9 | WSW 8 | WSW 8 | WSW 7 | WSW 8 | W 9 | WSW 9 | WSW 8 |
| kJ | 12 | 2 | 1 | — | — | — | — | — | 7 | 75 | 97 | 94 | 152 | 1177 | 277 | 199 | 407 | 850 | 1017 | 631 | 345 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 134 | 85 | 51 | 85 | 437 | 335 | 385 | 147 | 120 | 174 | 320 | 120 | 111 | 273 | 67 | 413 | 477 | 360 | 367 | 320 | 138 |
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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