Surf Forecasts:
The Boiler surf forecast from 27 Aug 2026:
- Most powerful swell: Saturday 29 Aug, 4PM (local time) - 10ft (3.0m), 8s period, WSW swell with 1,223 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 8s 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) 8s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s break down what’s coming up.
The first few days are a write-off. The Boiler is an inconsistent reef that only works occasionally, and from Thursday the 27th of August through the end of the month, the wind is all over the place – onshore or cross-shore – and the swell is tiny. The combined energy is mostly under 100 (up to 351), which is weak to moderate. The water temp is about average for this time of year, nothing special.
We’ve got a real gap. From Thursday the 27th of August through to Saturday the 29th, the swell picks up to 1.5m to 1.7m from the SW, but with a 25 to 40 km/h cross-shore wind, it’s messy and lumpy. The combined energy on Saturday afternoon is 326, but it’s blown out. Not worth it.
There’s a tiny window on Wednesday the 2nd of September in the morning. A glassy wind, a 1.1m swell from the WSW, but the period is only 5 seconds, so it’s weak and crumbly. The combined energy is 74, so it’s surfable but not good. Not a standout.
Then another gap. Thursday the 3rd through to early September, the wind picks up strong. The combined energy hits 651 on Saturday the 5th – that’s strong energy – but with a 45 km/h cross-on wind, it’s a kite-surfing setup, not a paddle-surfing one. The swell is 2.0m from the WSW, but it’s blown out. Not for beginners.
The real standout is Monday the 7th of September. The Boiler gets a 1.8m swell from the W with a gentle cross-offshore NW wind. The combined energy is 362, moderate, but the wind is clean, the conditions are good. The period is only 8 seconds, so it’s a bit weak, but it’s the best session in the whole run. It’s an intermediate reef, so not for beginners, but it’ll be clean and fun.
After that, the swell drops off. By Tuesday the 8th, it’s small again. Then, on Friday the 11th of September, there’s a promising sign: a 2.5m swell from the WSW with a 9-second period, light offshore N wind, and the combined energy hits 872 – that’s strong energy. This is a long-range standout, so less certain, but it could be a big, clean day for experts only. Anything over 2.5m on that reef is serious.
So, bottom line: don’t bother for the next week. The Boiler is inconsistent, and the wind is against us. Circle Monday the 7th of September for a clean session. And if you’re an expert, keep an eye on Friday the 11th of September – that could be a gem.
Rusty.
Short Range ForecastHeavy rain (total 24mm), heaviest during Fri night. Very mild (max 19°C on Thu morning, min 16°C on Sat night). Winds increasing (light winds from the SW on Thu night, strong winds from the SW by Sat morning). | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Sun afternoon. Very mild (max 18°C on Sun morning, min 14°C on Tue night). Winds decreasing (strong winds from the WSW on Sun afternoon, light winds from the NW by Tue night). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 7 | W 7 | SW 4 | SW 6 | SW 7 | WSW 6 | SW 7 | WSW 8 | WSW 9 | WSW 9 | WSW 6 | WSW 8 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | W 6 | WSW 6 | WSW 6 | WSW 6 | WSW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 4 | 10 | 120 | 314 | 160 | 204 | 1223 | 579 | 360 | 178 | 844 | 717 | 533 | 232 | 116 | 73 | 50 | 26 | 24 | 10 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross-on | cross-on | on | cross | cross | on | cross-on | cross | cross-off | cross | cross | cross-on | cross | cross | glassy | cross-on | cross |
High Tide | 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 | 10:01AM8.93m | 10:23PM8.83m | ||||||||
Low Tide | 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 | 3:57PM1.70m | ||||||||
 |  |  |  | |  |  | | | | |  |  | | | | | | | | | |
 | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — |
 | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:06 | — | — | 8:02 | — | — | 8:00 | — |
mm | 4 | — | — | 2 | 3 | 7 | 6 | 2 | — | 3 | 7 | 8 | — | — | — | 1 | — | — | — | 8 | 6 |
Temp °C | 19 | 19 | 18 | 17 | 18 | 18 | 18 | 18 | 17 | 18 | 17 | 17 | 16 | 16 | 16 | 17 | 18 | 16 | 17 | 18 | 18 |
Feels °C | 18 | 18 | 17 | 12 | 15 | 15 | 12 | 10 | 13 | 14 | 10 | 11 | 13 | 13 | 13 | 12 | 13 | 13 | 16 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 7 | W 7 | — | — | W 6 | — | — | WSW 9 | WSW 9 | — | — | WSW 10 | — | W 9 | WSW 6 | W 18 | W 8 | WSW 6 | W 8 | W 7 |
| kJ | 10 | 4 | 4 | — | — | 81 | — | — | 579 | 360 | — | — | 717 | — | 220 | 88 | 6 | 12 | 26 | 5 | 4 |
Swell 2 Height (m) Direction Period (s) | SW 5 | SW 7 | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 | W 8 | SW 16 | SW 15 |
| kJ | 1 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | 5 | 10 | 9 |
Swell 3 Height (m) Direction Period (s) | W 12 | W 9 | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 | — | — |
| kJ | 3 | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | — | — |
Wind waves Height (m) Direction Period (s) | ESE 3 | — | SW 4 | SW 6 | SW 7 | WSW 6 | SW 7 | WSW 8 | — | — | WSW 6 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | W 6 | WSW 6 | — | WSW 6 | WSW 4 |
| kJ | 2 | — | 10 | 120 | 314 | 160 | 204 | 1223 | — | — | 178 | 844 | 506 | 533 | 232 | 116 | 73 | 50 | — | 24 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 335 | 335 | 182 | 152 | 232 | 320 | 283 | 204 | 129 | 49 | 74 | 144 | 1 | 0 | 141 | 180 | 227 | 320 | 1 | 0 | 308 |
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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