Surf Forecasts:
The Boiler surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 7s period, W swell with offshore winds.
- Most powerful swell: Wednesday 26 Aug, 1PM (local time) - 4ft (1.2m), 8s period, SW swell with 169 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 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 Thursday (Aug 20) at 10PM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.6m and 9s. 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 1.2m 8s and forecast to arrive on Wednesday (Aug 26) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Thursday (Aug 20) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 20th Aug) | 3ft (0.9m) 7s |
| Best Surf | 10PM (Thu 20th Aug) | 3ft (0.9m) 7s |
| Most Powerful | 1PM (Wed 26th Aug) | 4ft (1.2m) 8s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, let me break it down for you. The Boiler's a pretty inconsistent reef break, and I gotta be straight with you—this 16-day window ain't looking great. The water's sitting at 70°, which is a lot warmer than we're used to seeing around here this time of year, so that's definitely a talking point.
The first solid sniff of anything surfable doesn't come until Friday morning, August 21st. You'll get a tiny 2ft swell from the WSW, with a short 8-second period, and the wind is offshore from the NNW at 9 mph. The wave energy is weak (72), so it's more about just getting wet than riding anything epic. It's clean, but very ordinary.
After that, we hit a dead zone. From Saturday the 22nd right through the rest of the month, it's flat to tiny. Lots of glassy mornings, sure, but swell heights barely hit 1.0ft and the energy is pathetic (down to 13 at one point). You'd be better off having a swim. I'm talking a solid 10 days of nothing worth paddling out for.
Finally, on Saturday, August 29th, we get a bit of a pulse. The morning shows a 7ft swell from the WSW, period around 9 seconds, and combined energy of 713 (moderate to strong). That's a proper size, but it's lumpy and messy with cross-shore winds. The afternoon drops to 6ft, still from the W, but the quality is marginal. This is probably the one standout, but it's a long way out so keep an eye on the forecast.
The Boiler is a reef, so that 7ft swell could be decent for intermediate surfers, but it's a little big for beginners. The period is short, so it won't be super clean. Crowds are sometimes an issue here, but given the long stretch of nothing, I'd expect a few people out.
Don't get too excited about early September either. On Wednesday, September 2nd, the morning shows 4ft from the WSW with an offshore N wind at 9 mph, giving clean but ordinary conditions. The energy is weak (126). Then Thursday September 3rd morning is glassy with 3ft, but again, nothing special.
Overall, the best bet in this whole window is that Saturday, August 29th morning if you're happy to gamble on a long-range forecast. Otherwise, it's a lean spell for The Boiler.
Rusty
Short Range ForecastLight rain (total 7mm), mostly falling on Fri afternoon. Very mild (max 19°C on Sat afternoon, min 12°C on Thu night). Winds decreasing (fresh winds from the NNW on Thu afternoon, calm by Sat morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Mon afternoon, min 15°C on Sun morning). Winds increasing (calm on Sun afternoon, strong winds from the ESE by Tue afternoon). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 7 | W 7 | WSW 9 | WSW 8 | WSW 6 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | W 9 | W 9 | WSW 10 | WSW 9 | ESE 4 | ESE 4 | ESE 4 | SE 3 | W 8 | SW 7 | SW 7 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 220 | 192 | 132 | 55 | 13 | 14 | 18 | 18 | 16 | 8 | 7 | 19 | 8 | 10 | 14 | 13 | 4 | 5 | 104 | 156 | 119 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | cross-off | cross-off | glassy | cross | cross-off | cross-on | glassy | cross-off | cross | cross | cross | cross | cross | cross-on | cross-on | on | cross-on |
High Tide | 11:51AM7.51m | 00:13AM7.29m | 12:49PM7.00m | 1:23AM6.79m | 2:19PM6.75m | 2:58AM6.69m | 3:48PM7.01m | 4:21AM7.06m | 4:55PM7.57m | 5:22AM7.63m | 5:45PM8.16m | 6:07AM8.18m | 6:26PM8.66m | ||||||||
Low Tide | 5:52PM3.08m | 6:17AM3.42m | 7:01PM3.61m | 7:43AM3.84m | 8:36PM3.79m | 9:21AM3.79m | 10:00PM3.49m | 10:37AM3.32m | 11:04PM2.94m | 11:31AM2.75m | 11:52PM2.38m | 12:13PM2.23m | 00:32AM1.92m | ||||||||
 |  |  | | |  | | | | | | |  |  | | | | | |  |  | |
 | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:15 | — |
mm | 1 | — | — | 1 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 3 |
Temp °C | 18 | 18 | 15 | 16 | 17 | 15 | 17 | 19 | 15 | 18 | 21 | 19 | 21 | 24 | 20 | 22 | 22 | 19 | 21 | 17 | 17 |
Feels °C | 13 | 13 | 11 | 12 | 14 | 12 | 15 | 15 | 11 | 16 | 20 | 16 | 16 | 19 | 13 | 16 | 15 | 17 | 18 | 14 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | WSW 9 | WSW 8 | WSW 6 | W 5 | WSW 10 | WSW 10 | WSW 9 | W 9 | W 9 | WSW 10 | WSW 9 | SW 9 | W 9 | W 8 | SE 3 | SW 5 | W 9 | SW 7 | WSW 8 |
| kJ | 8 | 8 | 132 | 55 | 12 | 5 | 18 | 18 | 16 | 6 | 6 | 19 | 8 | 3 | 6 | 5 | 4 | 3 | 6 | 156 | 119 |
Swell 2 Height (m) Direction Period (s) | W 15 | W 14 | SW 14 | SW 13 | WSW 8 | WSW 8 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | W 10 | W 9 | SW 13 | SW 8 | W 8 | W 8 | — | W 8 | WSW 9 |
| kJ | 4 | 4 | 8 | 7 | 13 | 14 | 9 | 8 | 8 | 8 | 7 | 8 | 2 | 2 | 7 | 3 | 1 | 5 | — | 21 | 29 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 16 | SW 13 | SW 13 | SW 15 | — | — | — | — | — | SW 14 | SW 14 | SW 9 | SW 13 | SW 8 | SW 8 | WSW 9 | W 11 | WSW 11 |
| kJ | — | — | — | 10 | 7 | 7 | 9 | — | — | — | — | — | 8 | 7 | 3 | 7 | 3 | 2 | 8 | 2 | 12 |
Wind waves Height (m) Direction Period (s) | WSW 7 | W 7 | NNW 4 | NNW 4 | NW 3 | — | — | — | — | — | — | — | E 3 | ESE 4 | ESE 4 | ESE 4 | SSE 3 | — | SW 7 | WSW 7 | — |
| kJ | 220 | 192 | 7 | 1 | 2 | — | — | — | — | — | — | — | 2 | 10 | 14 | 13 | 2 | — | 104 | 74 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 421 | 320 | 0 | 0 | 139 | 14 | 51 | 126 | 20 | 72 | 167 | 14 | 394 | 308 | 385 | 167 | 162 | 85 | 20 | 48 | 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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