Surf Forecasts:
The Boiler surf forecast from 28 Aug 2026:
- Most powerful swell: Monday 31 Aug, 7AM (local time) - 6.5ft (2.0m), 9s period, WSW swell with 673 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 2.0m 9s and forecast to arrive on Monday (Aug 31) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 29) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Mon 31st Aug) | 6.5ft (2.0m) 9s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – this 16-day stretch is shaping up to be a real test of patience. We’ve got one spot on the radar, The Boiler, and it’s a tricky one.
The water’s sitting at a very unusual 69°, which is way warmer than we’d expect for this time of year. Almost feels like summer hung on a bit too long.
Right now, there’s nothing doing. We’re looking at a dry spell until the tail end of the month. The first real glimmer comes on Monday, August 31st. The morning has a 6ft swell from the WSW, with a period of 9 seconds, and the wind is a clean cross-offshore. The combined energy is moderate at 978. It’s not perfect, but it’s the first surfable wave in days. The afternoon drops a bit to 5ft, still clean, but the energy drops with it.
After that, it gets messy again. Strong winds and rain blow through the first week of September, keeping the quality poor. The waves are there, but the wind's ruining them.
Saturday, September 5th, the morning looks alright. A 4ft WSW swell, light WNW wind, and clean conditions. It’s small, but it’s a chance to get wet without getting blown off your board.
Now, you want the standout? You have to wait for Tuesday, September 8th. This is the big one. The forecast is calling for a massive 15ft WSW swell, with a very long 11-second period. The energy is extreme, hitting 5011. The wind is clean and cross-offshore. But here’s the catch, and it’s a big one: this is way too much water for The Boiler. It’s a reef break, and while it’s inconsistent, a swell this size will be a washing machine. This is strictly for experts only, and even then, it’s going to be a battle. The raw power is there, but the break might not handle it.
The following morning, Wednesday, September 9th, the swell drops back to a manageable 4ft from the west, with clean light winds. It’s surfable, but nothing special.
Overall, if you’re an average surfer, the best bet is that Monday, August 31st morning session. If you’re a hardcore charger with no fear, Tuesday, September 8th is the only day with real, raw power, but it’s a gamble. The rest of the window is a write-off.
Stay patient, and keep an eye on the sky.
Rusty.
Short Range ForecastHeavy rain (total 37mm), heaviest during Sat morning. Very mild (max 19°C on Sun morning, min 15°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Wed morning. Very mild (max 18°C on Wed morning, min 15°C on Mon night). Winds increasing (light winds from the W on Mon night, strong winds from the SW by Wed morning). | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 6 | SW 6 | SW 6 | SW 7 | WSW 10 | WSW 9 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 10 | WSW 9 | WSW 6 | WSW 6 | WSW 6 | SW 6 | WSW 7 | WSW 7 | WSW 8 | WSW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 119 | 83 | 51 | 82 | 394 | 273 | 315 | 512 | 533 | 409 | 235 | 166 | 43 | 55 | 72 | 165 | 387 | 228 | 176 | 186 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross | on | on | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross |
High Tide | 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 | 10:38AM8.51m | 11:04PM8.29m | |||||||
Low Tide | 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 | 4:20AM1.90m | 4:35PM2.16m | ||||||||
 |  |  | | | | |  |  |  |  |  | | |  | | | | | | |
 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — |
 | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:06 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — |
mm | 1 | 5 | 13 | 1 | 1 | 3 | 5 | 8 | — | — | — | — | 1 | 2 | 3 | 1 | 1 | 1 | 1 | — |
Temp °C | 18 | 17 | 18 | 18 | 17 | 19 | 17 | 16 | 15 | 16 | 16 | 17 | 17 | 17 | 18 | 18 | 18 | 17 | 17 | 17 |
Feels °C | 14 | 14 | 14 | 17 | 15 | 15 | 13 | 12 | 11 | 13 | 14 | 14 | 13 | 15 | 12 | 13 | 13 | 11 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | — | WSW 6 | SW 6 | SW 7 | WSW 10 | WSW 9 | WSW 8 | WSW 8 | WSW 9 | — | WSW 10 | W 9 | W 9 | W 8 | SW 16 | W 16 | W 15 | SW 15 | SW 15 | SW 15 |
| kJ | — | 46 | 51 | 82 | 394 | 273 | 227 | 422 | 533 | — | 235 | 99 | 13 | 6 | 10 | 5 | 4 | 8 | 9 | 9 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SSE 3 | — | — | — | — | — | — | — | — | W 18 | SW 16 | W 16 | — | — | — | — | SW 15 |
| kJ | — | — | — | 1 | — | — | — | — | — | — | — | — | 6 | 10 | 5 | — | — | — | — | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | SW 6 | SE 3 | — | — | — | WSW 8 | WSW 8 | W 9 | WSW 9 | — | WSW 9 | WSW 6 | WSW 6 | WSW 6 | SW 6 | WSW 7 | WSW 7 | WSW 8 | WSW 8 |
| kJ | 119 | 83 | 5 | — | — | — | 315 | 512 | 445 | 409 | — | 166 | 43 | 55 | 72 | 165 | 387 | 228 | 176 | 186 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 273 | 393 | 393 | 48 | 138 | 67 | 67 | 49 | 9 | 48 | 0 | 147 | 308 | 133 | 431 | 776 | 278 | 899 | 360 | 278 |
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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