Surf Forecasts:
The Boiler surf forecast from 2 Sep 2026:
- Best quality surf: Saturday 5 Sep, 7AM (local time) - 3.5ft (1.1m), 7s period, W swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 7PM (local time) - 6ft (1.8m), 12s period, WSW swell with 928 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 7AM (local time) - 3.5ft (1.1m), 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 7AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.1m and 14s. 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 1.8m 12s and forecast to arrive on Monday (Sep 07) at 7PM. 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+) | 7AM (Sat 5th Sep) | 3.5ft (1.1m) 7s |
| Best Surf | 7AM (Sat 5th Sep) | 3.5ft (1.1m) 7s |
| Most Powerful | 7PM (Mon 7th Sep) | 6ft (1.8m) 12s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer.
The forecast over the next 16 days is a pretty quiet run for this area—there’s not much to get excited about, especially in the first week. We’re looking at a solid gap of poor or marginal conditions for days on end. The one real opportunity sits way out there on Thursday the 17th, and that’s where we’ll focus.
It’s a challenging start. Wednesday 2nd kicks off with a bumpy 3ft WSW windswell at 6 seconds, and that’s made nasty by a 16 mph onshore southerly. The combined energy is weak, only 80. Thursday and Friday aren’t much better; we see some size bumping to 5ft on Thursday afternoon, but the wind is messy cross-onshore and the period stays short. Friday morning on the 4th might be the first sign of something cleaner—6ft WSW swell at 8 seconds with light cross-offshore WNW winds, and the water’s clean. That’s a marginal call though, and the rating is poor overall.
Saturday the 5th morning actually has a clean window: 3ft from the west, 7 seconds, with a slight offshore breeze from the WNW (3 mph). The energy is low at 104, and it’s not much to write home about, but it’s at least surfable. That little burst is gone by the afternoon as the wind swings and the swell drops.
Then we hit a real lull. From Saturday afternoon all the way through to Monday the 14th, the surf is mostly tiny, weak, and chopped up by onshore or cross-shore breezes. There are pockets of clean water, like Monday the 7th morning when a 13-second groundswell hits around 3ft with a 12 mph cross-offshore from the WNW—the energy is moderate at 391—but the wind is just enough to ruin it, and the rating stays marginal. Nothing’s really clicking.
Now, the standout. On Thursday the 17th of September, in the morning, we finally get something solid. The Boiler picks up a 4ft swell from the WSW with a solid 11-second period, and the wind is dead calm—glassy, glassy conditions. The combined energy is strong at 353. This is the best window in the whole 16-day run. The swell direction (WSW) lines up with the optimum for this spot, and with the glassy surface, the reef should offer clean, well-shaped lines.
A couple things to keep in mind: The Boiler is a reef break that’s rated as inconsistent and only for intermediate surfers, so don’t expect a party wave every set. Also, it can get crowded sometimes, so if you’re out there on the 17th, keep your head on a swivel. That 4ft swell is manageable for confident surfers, not too big for intermediates, and with light airs it’s prime.
Overall, this forecast is slim pickings. There’s a long dry spell from the first few days until the 17th, but if you can wait, that Thursday morning is your shot. For this area, a blank run like this is pretty normal in these conditions—forecasts can change, but for now, be patient.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Thu night. Very mild (max 19°C on Wed afternoon, min 16°C on Tue night). Winds increasing (light winds from the SW on Tue night, strong winds from the SW by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Sun afternoon, min 12°C on Fri night). Winds increasing (calm on Sat night, fresh winds from the W by Mon afternoon). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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 6 | WSW 7 | WSW 7 | WSW 8 | WSW 7 | WSW 7 | WSW 8 | W 8 | W 6 | W 7 | WSW 6 | WSW 9 | W 9 | WSW 8 | WSW 8 | WSW 13 | WSW 12 | W 8 | WSW 10 | WSW 10 | WSW 9 |
Wave Graph | |||||||||||||||||||||
65 | 306 | 344 | 214 | 249 | 326 | 335 | 294 | 120 | 92 | 56 | 65 | 40 | 24 | 51 | 384 | 807 | 258 | 295 | 197 | 113 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-off | cross | cross | cross | cross-on | cross-on |
High Tide | 10:01AM8.93m | 10:23PM8.83m | 10:38AM8.51m | 11:04PM8.29m | 11:24AM7.96m | 00:02AM7.65m | 12:36PM7.40m | 1:34AM7.19m | 2:22PM7.24m | 3:19AM7.32m | 3:58PM7.71m | 4:43AM7.95m | 5:11PM8.48m | ||||||||
Low Tide | 3:57PM1.70m | 4:20AM1.90m | 4:35PM2.16m | 5:02AM2.45m | 5:26PM2.76m | 6:02AM3.09m | 6:51PM3.32m | 7:47AM3.49m | 8:54PM3.32m | 9:37AM3.19m | 10:26PM2.71m | 10:56AM2.48m | 11:34PM1.96m | ||||||||
6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | |
— | 8:00 | — | — | 7:59 | — | — | 7:57 | — | — | 7:53 | — | — | 7:52 | — | — | 7:50 | — | — | 7:47 | — | |
mm | 2 | 1 | — | — | — | 5 | 1 | — | — | — | — | — | — | — | — | — | — | — | 2 | 3 | 17 |
Temp °C | 17 | 19 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 14 | 15 | 14 | 19 | 22 | 19 | 17 | 16 | 17 | 17 | 17 | 16 |
Feels °C | 13 | 14 | 16 | 16 | 14 | 15 | 12 | 12 | 12 | 11 | 12 | 13 | 15 | 17 | 17 | 13 | 11 | 12 | 12 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 16 | — | W 15 | SW 15 | SW 16 | — | SW 15 | SW 14 | W 8 | W 7 | SW 13 | WSW 9 | W 9 | WSW 8 | WSW 8 | WSW 13 | — | W 8 | WSW 10 | WSW 10 | WSW 9 |
10 | — | 4 | 8 | 9 | — | 8 | 8 | 37 | 92 | 7 | 65 | 40 | 24 | 51 | 384 | — | 258 | 295 | 197 | 113 | |
Swell 2 Height (m) Direction Period (s) | W 16 | — | — | — | — | — | W 15 | — | SW 14 | SW 14 | W 14 | SW 13 | SW 13 | SW 13 | WSW 16 | — | — | WSW 11 | — | — | — |
5 | — | — | — | — | — | 4 | — | 8 | 8 | 4 | 7 | 7 | 6 | 26 | — | — | 164 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 14 | — | — | — | — | W 12 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 4 | — | — | — | — | 3 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 6 | WSW 7 | WSW 7 | WSW 8 | WSW 7 | WSW 7 | WSW 8 | W 8 | W 6 | — | WSW 6 | — | — | SE 2 | — | SW 4 | WSW 12 | — | — | — | — |
65 | 306 | 344 | 214 | 249 | 326 | 335 | 294 | 120 | — | 56 | — | — | 1 | — | 7 | 807 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 416 | 320 | 147 | 133 | 308 | 175 | 48 | 340 | 48 | 0 | 154 | 13 | 101 | 20 | 96 | 9 | 178 | 138 | 144 | 221 | 25 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











