Surf Forecasts:
The Boiler surf forecast from 30 Aug 2026:
- Best quality surf: Saturday 5 Sep, 10AM (local time) - 4ft (1.2m), 7s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 1PM (local time) - 8ft (2.5m), 8s period, W swell with 1,045 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 10AM (local time) - 4ft (1.2m), 7s 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 Saturday (Sep 05) at 10AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.3m and 11s. 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 2.5m 8s and forecast to arrive on Friday (Sep 04) at 1PM. 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+) | 10AM (Sat 5th Sep) | 4ft (1.2m) 7s |
| Best Surf | 10AM (Sat 5th Sep) | 4ft (1.2m) 7s |
| Most Powerful | 1PM (Fri 4th Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let me break it down in feet and degrees.
The Boiler’s looking at a pretty glum run ahead. We got a solid 16 days of forecast but honestly, for the first nine or ten of those, the wind and conditions are just walloping any chance of a decent session. The swell comes through at times – there’s even some moderate energy pushing in – but the wind is mostly cross-on or strong, tearing the surface to bits. The real kicker is the water temp. When we get to Sunday morning the 30th of August, the water’s sitting at 69° – that’s a massive 8° warmer than normal for this time of year. That’s weird. Feels like summer hung around too long.
The only real standout in this whole 16-day window is shaping up for Saturday morning, the 5th of September. A light northwesterly breeze swings in cross-offshore, the swell drops a bit but cleans right up. We got a 4ft west swell, and the water should be glassy enough to actually get a proper ride. The Boiler is a reef break, and with a light cross-off, it’ll hold that southwest swell shape nicely. It’s inconsistent here though – always has been – so you might wait a bit, but when it comes through, it’ll be worth it. The energy reading (161) says it's moderate but not pumping. Still, with the clean conditions, this is your best shot. Crowds are a possibility – it’s a known spot, so don’t expect solitude.
Before that, Monday the 31st of August morning has a decent 7ft west swell (moderate-strong energy at 721) and clean cross-offshore wind from the WNW. The swell period’s only 9 seconds, so it’s not a proper groundswell, but the shape should be half-decent. However, the surf is described as marginal – tide might mess with it, and it’s borderline on quality. Stronger paddler’s wave.
After that Saturday, the rest of the forecast goes flat and weak. You've got tiny waves and predominantly onshore or light cross-shore winds until the end of the run. The week starting the 8th of September has some glassy mornings but the swell’s barely a ripple (1ft to 3ft). Not worth suiting up.
So to boil it down: Saturday morning the 5th of September is the call. The rest is either blown out or flat. Stick that in the calendar.
Rusty.
Short Range ForecastModerate rain (total 18mm), heaviest on Sun night. Very mild (max 18°C on Sun morning, min 14°C on Sun night). Winds decreasing (fresh winds from the SW on Sun night, light winds from the WSW by Mon night). | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Thu night. Very mild (max 19°C on Wed afternoon, min 13°C on Fri night). Mainly strong winds. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 6 | WSW 8 | W 9 | WSW 10 | WSW 10 | W 9 | WSW 8 | WSW 5 | WSW 6 | WSW 7 | WSW 8 | WSW 8 | WSW 8 | W 7 | W 8 | W 8 | W 8 | W 7 | WSW 6 | W 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 267 | 253 | 537 | 721 | 540 | 276 | 127 | 125 | 42 | 292 | 420 | 355 | 246 | 270 | 427 | 982 | 925 | 371 | 131 | 53 | 21 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross | cross | cross-off | cross-off | cross | glassy |
High Tide | 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 | 11:24AM7.96m | 00:02AM7.65m | 12:36PM7.40m | 1:34AM7.19m | ||||||||
Low Tide | 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 | 5:02AM2.45m | 5:26PM2.76m | 6:02AM3.09m | 6:51PM3.32m | ||||||||
 |  |  |  | |  | | |  |  |  | | | |  | |  |  | | | | |
 | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — |
 | — | 8:07 | — | — | 8:06 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — | — | 7:53 | — |
mm | 2 | 6 | 9 | — | — | — | 1 | — | — | 1 | — | — | — | — | 9 | — | — | — | — | — | — |
Temp °C | 18 | 17 | 16 | 15 | 16 | 16 | 17 | 17 | 17 | 18 | 19 | 18 | 18 | 18 | 17 | 17 | 18 | 16 | 15 | 15 | 14 |
Feels °C | 13 | 12 | 9 | 10 | 10 | 13 | 14 | 13 | 15 | 13 | 15 | 14 | 15 | 14 | 12 | 10 | 12 | 10 | 13 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | — | — | — | — | WSW 10 | W 9 | W 18 | W 8 | W 16 | — | W 15 | SW 15 | SW 16 | W 12 | — | — | SW 14 | W 7 | W 10 | W 6 |
| kJ | 197 | — | — | — | — | 276 | 127 | 6 | 11 | 5 | — | 4 | 8 | 9 | 27 | — | — | 7 | 131 | 18 | 21 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 16 | — | — | — | SW 15 | — | — | — | — | — | WSW 11 | SW 13 | W 9 |
| kJ | — | — | — | — | — | — | — | — | 10 | — | — | — | 9 | — | — | — | — | — | 22 | 7 | 15 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | — | SW 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | — | 7 |
Wind waves Height (m) Direction Period (s) | WSW 9 | WSW 6 | WSW 8 | W 9 | WSW 10 | — | — | WSW 8 | WSW 5 | WSW 6 | WSW 7 | WSW 8 | WSW 8 | WSW 8 | W 7 | W 8 | W 8 | W 8 | — | WSW 6 | — |
| kJ | 267 | 253 | 537 | 721 | 540 | — | — | 125 | 42 | 292 | 420 | 355 | 246 | 270 | 427 | 982 | 925 | 371 | — | 53 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 273 | 361 | 49 | 119 | 49 | 67 | 133 | 182 | 133 | 320 | 416 | 278 | 133 | 133 | 308 | 360 | 360 | 151 | 0 | 190 | 14 |
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.
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