Surf Forecasts:
The Boiler surf forecast from 29 Aug 2026:
- Best quality surf: Saturday 29 Aug, 1PM (local time) - 3.5ft (1.0m), 6s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 7AM (local time) - 7ft (2.1m), 9s period, W swell with 775 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 1PM (local time) - 3.5ft (1.0m), 6s period with SW 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 (Aug 29) at 1PM. The primary swell is predicted to be 1.0m and 6s 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 2.1m 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 0.2m 3s period and expected on Saturday (Aug 29) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Sat 29th Aug) | 3.5ft (1.0m) 6s |
| Best Surf | 1PM (Sat 29th Aug) | 3.5ft (1.0m) 6s |
| Most Powerful | 7AM (Mon 31st Aug) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here again. Let's break down what The Boiler has in store. It's a reef break, intermediate level, and it can be inconsistent. The water's sitting at 69°F, which is much warmer than usual for this time of year, so that's a nice surprise.
Straight up, this 16-day window is a tough one. There's a lot of wind and lumpy conditions to sit through before we get anything worth paddling out for. The first week is pretty much a write-off.
We start off with nothing good on Saturday, August 29th. Rain showers, a gusty 30 km/h cross-onshore wind, and only 3ft of weak, short-period SW swell. The combined energy is a meager 59. It's messy and not worth suiting up. Sunday the 30th is more of the same, with the wind swinging onshore and building the swell to 6ft, but the period is down to 6 seconds and the energy is still moderate at 246 – it's a chop fest.
Monday the 31st is the first time we see a flicker of hope. The swell picks up to 7ft from the W with a 9-second period, and the wind swings cross-offshore. The combined energy jumps to a strong 675. The comment says "clean," but the score is still a 1, so it's marginal. The swell is getting chunky, over 5ft, so it's getting out of beginner territory. Tuesday the 1st and Wednesday the 2nd see the wind turn back onshore, and the surf quality drops off again. Thursday the 3rd through Saturday the 5th of September stay poor, with strong cross-shore winds and a messy sea state. The swell stays small and weak through the 5th and 6th.
Now, here's where it gets interesting. After a long stretch of average to poor conditions, we finally get a standout moment. Monday morning, September 7th. This is the best on offer. The forecast shows a glassy morning with 5ft of WSW swell rolling in with a 10-second period. The combined energy is a solid 386. The wind is dead calm, which is a massive positive for a reef like this – it'll be clean and lined up. The swell is right in that intermediate sweet spot, not too big, not too small. The optimum swell direction is SW, and we're getting a WSW, so it's in the right ballpark. This is a legit window. The afternoon on the 7th won't be as good with the wind picking up cross-shore, but that morning session is the one to circle.
Tuesday the 8th has some clean morning conditions with 4ft of WSW swell, but the energy is lower at 181 and the period drops to 7 seconds. It's surfable, but nothing special. After that, from Wednesday the 9th right through to the end of the outlook on Sunday the 13th, it's a total bust. The swell drops right off, the wind is either onshore or howling cross-shore at 40 km/h, and the energy is weak. There's nothing to chase in that second week.
So, to sum it up: the first week is a grind. Hang in there, because Monday the 7th of September is your one clear shot at a clean, glassy, fun-size reef session at The Boiler. After that, it's a long gap of poor surf.
Rusty.
Short Range ForecastHeavy rain (total 32mm), heaviest during Sat morning. Very mild (max 19°C on Sat afternoon, min 14°C on Sun night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Tue night. Very mild (max 19°C on Wed morning, min 15°C on Thu night). Winds increasing (moderate winds from the SW on Tue morning, strong winds from the W by Thu night). | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | SW 6 | SW 7 | WSW 9 | WSW 9 | WSW 6 | WSW 8 | W 9 | WSW 9 | WSW 10 | W 9 | WSW 5 | WSW 6 | SW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | W 7 | W 7 | W 6 | WSW 7 |
Wave Graph | |||||||||||||||||||||
51 | 105 | 435 | 267 | 246 | 581 | 675 | 400 | 197 | 137 | 59 | 59 | 337 | 636 | 615 | 449 | 365 | 320 | 212 | 193 | 152 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | on | cross-on | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-off | cross-off |
High Tide | 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 | 11:24AM7.96m | 00:02AM7.65m | ||||||||
Low Tide | 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 | 5:02AM2.45m | 5:26PM2.76m | ||||||||
6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | |
— | 8:09 | — | — | 8:07 | — | — | 8:06 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — | |
mm | 12 | — | 1 | 3 | 9 | 6 | — | — | 1 | — | 1 | 9 | 5 | — | — | — | 1 | 1 | — | — | — |
Temp °C | 17 | 19 | 17 | 18 | 17 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 19 | 19 | 18 | 18 | 18 | 16 | 16 | 18 | 16 |
Feels °C | 13 | 17 | 16 | 15 | 13 | 11 | 10 | 11 | 14 | 13 | 13 | 14 | 15 | 15 | 14 | 13 | 13 | 9 | 7 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 6 | — | W 9 | WSW 9 | — | — | — | — | WSW 10 | W 9 | W 18 | W 8 | — | — | W 15 | SW 15 | SW 16 | SW 15 | SW 14 | SW 14 | W 9 |
51 | — | 372 | 267 | — | — | — | — | 197 | 127 | 6 | 6 | — | — | 4 | 9 | 9 | 9 | 8 | 8 | 40 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 16 | — | — | — | — | — | — | W 15 | — | SW 14 |
— | — | — | — | — | — | — | — | — | — | — | 10 | — | — | — | — | — | — | 4 | — | 8 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | — | — | — | — | — | — | SW 14 |
— | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | — | — | 8 | |
Wind waves Height (m) Direction Period (s) | SSE 3 | SW 7 | WSW 9 | — | WSW 6 | WSW 8 | W 9 | WSW 9 | — | WSW 9 | WSW 5 | WSW 6 | SW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | W 7 | W 7 | W 6 | WSW 7 |
8 | 105 | 435 | — | 246 | 581 | 675 | 400 | — | 137 | 59 | 59 | 337 | 636 | 615 | 449 | 365 | 320 | 212 | 193 | 152 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 393 | 223 | 0 | 39 | 361 | 582 | 360 | 144 | 0 | 133 | 133 | 320 | 421 | 440 | 278 | 320 | 899 | 385 | 597 | 360 | 48 |
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.











