Surf Forecasts:
The Boiler surf forecast from 16 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 2.5ft (0.7m), 6s period, W swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 1AM (local time) - 5ft (1.6m), 7s period, W swell with 269 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 2.5ft (0.7m), 6s 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 0.7m and 6s period with a secondary swell of 0.5m and 8s. 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 1.6m 7s and forecast to arrive on Thursday (Aug 20) 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 0.4m 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) | 2.5ft (0.7m) 6s |
| Best Surf | 10PM (Thu 20th Aug) | 2.5ft (0.7m) 6s |
| Most Powerful | 1AM (Thu 20th Aug) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s be straight with you – right now, and for the next week or more, The Boiler is basically flat or blown out. It’s a tough stretch. The first real pulse of energy worth paddling for doesn't show up until well into the second week.
We kick off Sunday the 16th with practically nothing. A tiny 1ft WSW swell on a short 7-second period with glassy conditions early, but it’s just too small. The water is 70° – that’s much warmer than normal for this time of year.
From Sunday through the 20th, the swell stays weak and messy. There’s a slight bump on Thursday the 20th morning with 5ft from the WSW and clean conditions, and wave energy jumps up (432), but it’s still marginal with a poor surf rating. Not worth the drive.
The weekend of the 22nd and 23rd is tiny, with variable wind. Monday the 24th to Wednesday the 26th is almost flat – 0.3ft to 1ft – just small slop, though the mornings on the 26th are glassy.
Now, here’s the stand-out. On Friday the 28th morning, we finally see some size: 6ft from the WSW with an 8-second period. The wave energy shows strong at (624). The problem? It’s cross-onshore and choppy, so it’ll be a bumpy ride. This is the biggest swell of the 16 days, but the quality is poor. There’s a chance on Saturday the 29th morning as the swell backs off to 4ft but goes clean with a cross-off wind. That’s probably the best pick. The Boiler is an inconsistent reef, so any cleaner session with a bit of power is a win. Expect crowds possible as it’s the only real option.
After that, we get hammered by strong onshores and rain from the 30th onward. By Monday the 31st, it’s small and messy again. A long flat run looks likely into September.
Stay patient. Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Mon morning, min 14°C on Tue night). Winds increasing (calm on Sun morning, fresh winds from the W by Tue afternoon). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Wed night. Very mild (max 17°C on Wed afternoon, min 12°C on Thu night). Winds decreasing (fresh winds from the W on Wed afternoon, light winds from the NNW by Thu night). | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 | WSW 7 | WSW 7 | W 5 | W 5 | W 5 | W 6 | W 6 | WSW 6 | W 6 | WSW 6 | W 7 | WSW 7 | W 7 | W 7 | W 8 | W 6 | WSW 8 | W 8 | WSW 10 | WSW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 18 | 18 | 10 | 14 | 37 | 13 | 97 | 76 | 58 | 130 | 155 | 269 | 214 | 163 | 43 | 48 | 18 | 14 | 12 | 20 | 18 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross | cross-off | cross | cross-on | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | off | cross-off | off |
High Tide | 9:51PM9.46m | 10:10AM9.04m | 10:23PM9.02m | 10:41AM8.59m | 10:55PM8.48m | 11:12AM8.06m | 11:28PM7.89m | 11:51AM7.51m | 00:13AM7.29m | 12:49PM7.00m | 1:23AM6.79m | 2:19PM6.75m | 2:58AM6.69m | ||||||||
Low Tide | 3:34PM1.13m | 3:57AM1.32m | 4:04PM1.48m | 4:25AM1.75m | 4:35PM1.94m | 4:54AM2.27m | 5:08PM2.48m | 5:28AM2.83m | 5:52PM3.08m | 6:17AM3.42m | 7:01PM3.61m | 7:43AM3.84m | 8:36PM3.79m | ||||||||
 |  |  | |  |  | | |  | |  |  | | | | | | | | | | |
 | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — |
 | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 3 | — | 1 | — | — | — | — | — | — | — |
Temp °C | 17 | 18 | 18 | 19 | 18 | 18 | 19 | 18 | 17 | 16 | 17 | 16 | 17 | 17 | 14 | 16 | 17 | 14 | 17 | 18 | 14 |
Feels °C | 16 | 14 | 19 | 16 | 14 | 16 | 16 | 13 | 15 | 11 | 11 | 10 | 12 | 12 | 9 | 12 | 13 | 11 | 14 | 12 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | W 7 | WSW 7 | W 5 | W 18 | WSW 7 | W 6 | SW 17 | SW 17 | SW 16 | W 16 | SW 16 | WSW 7 | SW 14 | W 7 | W 8 | WSW 8 | W 5 | W 8 | WSW 10 | WSW 10 |
| kJ | 18 | 9 | 10 | 14 | 6 | 10 | 97 | 11 | 12 | 11 | 5 | 10 | 214 | 8 | 43 | 48 | 12 | 8 | 12 | 20 | 18 |
Swell 2 Height (m) Direction Period (s) | — | — | W 7 | W 7 | — | — | SW 16 | — | — | — | — | W 16 | SW 15 | W 15 | SW 14 | — | SW 13 | WSW 8 | WSW 11 | SW 15 | SW 15 |
| kJ | — | — | 9 | 4 | — | — | 11 | — | — | — | — | 5 | 8 | 4 | 8 | — | 7 | 14 | 11 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 14 | SW 13 | SW 16 | W 12 | SW 15 | SW 15 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 7 | 10 | 3 | 9 | 9 | — |
Wind waves Height (m) Direction Period (s) | — | WSW 7 | W 3 | — | W 5 | W 5 | — | W 6 | WSW 6 | W 6 | WSW 6 | W 7 | W 7 | W 7 | NNW 3 | NNW 4 | W 6 | — | — | NNE 2 | ESE 2 |
| kJ | — | 18 | 2 | — | 37 | 13 | — | 76 | 58 | 130 | 155 | 269 | 210 | 163 | 2 | 1 | 18 | — | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 288 | 423 | 232 | 318 | 320 | 412 | 235 | 1180 | 408 | 441 | 320 | 482 | 48 | 360 | 14 | 318 | 318 | 188 | 288 | 306 | 178 |
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.
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