
Surf Forecasts:
The Boiler surf forecast from 13 Sep 2026:
- Best quality surf: Sunday 20 Sep, 4AM (local time) - 5ft (1.5m), 7s period, W swell with offshore winds.
- Most powerful swell: Friday 18 Sep, 1AM (local time) - 6ft (1.8m), 8s period, W swell with 381 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 4AM (local time) - 5ft (1.5m), 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 Sunday (Sep 20) at 4AM. The primary swell is predicted to be 1.5m and 7s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at The Boiler in the next 16 days are 1.8m 8s and forecast to arrive on Friday (Sep 18) at 1AM. 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 Wednesday (Sep 16) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sun 20th Sep) | 5ft (1.5m) 7s |
| Best Surf | 4AM (Sun 20th Sep) | 5ft (1.5m) 7s |
| Most Powerful | 1AM (Fri 18th Sep) | 6ft (1.8m) 8s |
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 outlook is a bit of a tough one. We’re looking at The Boiler, and honestly, the next couple of weeks are looking pretty bleak for quality waves. The Boiler is an inconsistent reef setup that needs a good SW swell and clean conditions to really fire, and we just aren't getting that combination.
Right now, the water is sitting at 66°, which is over five and a half degrees warmer than normal for this time of year – that’s pretty wild, feels more like a late summer holdover than early autumn.
We kick off on Sunday the 13th with some light rain and a cross-on breeze. There's a moderate 4ft swell from the WSW, but the combined wave energy is a weak-to-moderate (520), and the wind is just making a mess of it. Not worth paddling out.
Monday the 14th and Tuesday the 15th are much the same story – small, cross-onshore slop. The swell drops right off, and the winds stay nasty. A total write-off.
We get a little glimmer Wednesday morning the 16th. The swell picks up a touch to 5ft from the west, the period stretches to 10 seconds, and the wind goes cross-offshore. The combined energy climbs to a moderate (349), and the conditions look clean. It’s only a 1/10, but this is probably the best we’ll see in the first week. Don't expect perfection, but it's the only window where you might find a few workable ones.
From there, it's back into a slump. The rest of that week and into the next is plagued by onshore winds, lumpy cross-chop, and weak, short-period swell. The waves just don't have any power or shape.
There's a brief tease on Sunday the 20th. We get a gentle offshore breeze from the north, but the swell is tiny – only 3ft from the WSW with weak energy (113). It's surfable, but you'll be scratching for anything with a pulse.
The following week is flat. We get a few pulses of moderate offshore wind around the 22nd and 23rd, with swell bumping up to 5ft and 6ft, but the period is a dismal 6 to 7 seconds. That short-period wind swell just won't have any punch or shape at a reef like this. It's a pass.
From the 24th right through to the 28th, the swell completely dies. We're talking ankle-snappers under 2ft. The combined energy drops into the teens and twenties. You could literally have a flat, glassy day on the 24th afternoon, but there’s nothing to ride. This is a long stretch of nothing.
Honestly, for the next two weeks, if you're desperate for a paddle, maybe the Wednesday morning of the 16th is your best shot. Otherwise, this is a blank run. For an inconsistent spot like The Boiler, these quiet spells are just part of the deal. Keep an eye on the charts, things can change.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Very mild (max 19°C on Mon night, min 12°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Fri night. Very mild (max 17°C on Fri night, min 14°C on Thu morning). Mainly fresh winds. | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 10 | W 10 | WSW 9 | WSW 9 | WSW 6 | W 7 | W 7 | WSW 8 | W 10 | WSW 10 | W 10 | W 7 | W 7 | W 8 | W 7 | WSW 7 | WSW 6 | WSW 7 | WSW 7 | WSW 7 |
Wave Graph | ||||||||||||||||||||
295 | 197 | 132 | 172 | 119 | 208 | 212 | 169 | 349 | 106 | 200 | 274 | 269 | 381 | 264 | 180 | 132 | 212 | 285 | 254 | |
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-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross | cross-on | cross | cross-on | cross |
High Tide | 8:46PM9.69m | 9:03AM9.43m | 9:17PM9.39m | 9:32AM9.11m | 9:45PM8.97m | 10:00AM8.68m | 10:13PM8.45m | 10:28AM8.16m | 10:42PM7.86m | 11:00AM7.58m | 11:19PM7.23m | 11:50AM6.98m | 00:25AM6.64m | |||||||
Low Tide | 2:51AM1.13m | 2:58PM1.20m | 3:16AM1.44m | 3:26PM1.54m | 3:42AM1.85m | 3:54PM2.00m | 4:07AM2.35m | 4:23PM2.56m | 4:36AM2.93m | 5:00PM3.19m | 5:15AM3.56m | 6:01PM3.82m | ||||||||
— | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | |
7:36 | — | — | 7:34 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | |
mm | 1 | — | 1 | — | 3 | — | — | 1 | — | — | 2 | — | — | — | — | — | 6 | 1 | 1 | 3 |
Temp °C | 18 | 18 | 18 | 18 | 19 | 16 | 16 | 16 | 15 | 15 | 16 | 15 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 17 |
Feels °C | 17 | 18 | 16 | 15 | 16 | 10 | 10 | 13 | 10 | 10 | 10 | 9 | 8 | 10 | 11 | 11 | 14 | 13 | 12 | 15 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | WSW 9 | — | WSW 9 | W 11 | — | WSW 8 | W 10 | WSW 10 | W 10 | W 10 | — | — | — | W 13 | W 12 | W 11 | — | — |
225 | 188 | 132 | — | 15 | 2 | — | 169 | 349 | 106 | 200 | 8 | — | — | — | 13 | 11 | 2 | — | — | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — |
— | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 10 | WSW 9 | — | WSW 9 | WSW 6 | W 7 | W 7 | NW 4 | — | W 6 | WSW 5 | W 7 | W 7 | W 8 | W 7 | WSW 7 | WSW 6 | WSW 7 | WSW 7 | WSW 7 |
295 | 197 | — | 172 | 119 | 208 | 212 | 10 | — | 65 | 59 | 274 | 269 | 381 | 264 | 180 | 132 | 212 | 285 | 254 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 133 | 122 | 133 | 133 | 133 | 360 | 320 | 3 | 9 | 320 | 352 | 360 | 360 | 360 | 367 | 320 | 365 | 365 | 144 | 19 |
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.











