Surf Forecasts:
The Boiler surf forecast from 19 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 7AM (local time) - 3ft (0.9m), 6s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 1AM (local time) - 4.5ft (1.4m), 9s period, WSW swell with 326 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 7AM (local time) - 3ft (0.9m), 6s period with WSW 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 Wednesday (Aug 19) at 7AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.1m and 17s. 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 1.4m 9s and forecast to arrive on Wednesday (Aug 26) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Friday (Aug 21) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 19th Aug) | 3ft (0.9m) 6s |
| Best Surf | 7AM (Wed 19th Aug) | 3ft (0.9m) 6s |
| Most Powerful | 1AM (Wed 26th Aug) | 4.5ft (1.4m) 9s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what's coming up.
Honestly, for the next week or so, it's looking pretty flat and ordinary. The Boiler is an inconsistent reef that needs a solid push from the southwest, and we just aren't getting it. From Wednesday the 19th right through the weekend and into the start of the following week, the swell is tiny, barely scraping a foot, and the energy is weak. It's just not worth paddling out for. There's a long stretch here with no real recommendations at all.
Now, things start to look a bit more interesting as we head into the end of the month and the start of September. The first real glimmer of hope shows up on Saturday the 29th of August. The Boiler gets a little bump in the afternoon, with some 4ft swell coming from the WSW and a period of 8 seconds. The wind is a clean cross-off, so it will be tidy. The wave energy gets into the moderate range, making it surfable, but it's still very ordinary.
The real standout, and the only one I'd get excited about, is looking like Tuesday morning, the 1st of September. We've got a solid 7.5ft ground swell from the WSW, rolling in with a long 10-second period. The wave energy is strong (939), which means plenty of push. The wind is a light cross-off from the WNW, so it should be clean. This is a lot of swell for The Boiler though—at that size it’s getting into expert territory for sure. For a reef break, a longer period swell like this will handle it well, but it’s not a day for beginners.
Before that, on Monday the 31st of August, the swell is even bigger, hitting 10ft, but the wind is much stronger and more side-shore, making it a messy, lumpy affair. That one's really only for the chargers and likely more gnarly than fun.
So, to wrap it up: the next week is a write-off for The Boiler. Keep an eye on Tuesday the 1st of September for your best bet at some decent, clean waves, but only if you've got the experience for it.
Short Range ForecastModerate rain (total 10mm), heaviest on Tue night. Very mild (max 18°C on Tue night, min 12°C on Thu night). Winds decreasing (fresh winds from the W on Wed afternoon, calm by Fri morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sun afternoon, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 5 | WSW 7 | WSW 8 | W 8 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 9 | W 8 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | W 8 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 46 | 75 | 225 | 234 | 233 | 106 | 54 | 13 | 23 | 18 | 18 | 16 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 5 | 326 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-off | cross-off | off | glassy | cross-off | off | cross-off | cross-off | off | glassy | cross | cross | cross-on | cross | cross-on | cross-off | cross | cross-on |
High Tide | 11:12AM8.06m | 11:28PM7.89m | 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 | ||||||||
Low Tide | 4:54AM2.27m | 5:08PM2.48m | 5:28AM2.83m | 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 | |||||||
 |  |  | | |  |  |  | |  | |  | | | | | |  | | | | |
 | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — |
 | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — |
mm | 1 | — | 4 | 1 | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 16 | 17 | 18 | 16 | 16 | 17 | 14 | 16 | 19 | 16 | 17 | 20 | 18 | 19 | 20 | 18 | 15 | 17 | 16 |
Feels °C | 13 | 11 | 12 | 12 | 13 | 13 | 13 | 13 | 10 | 14 | 16 | 13 | 15 | 17 | 14 | 16 | 16 | 15 | 12 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 6 | W 16 | WSW 7 | WSW 8 | SW 14 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 9 | W 8 | WSW 8 | WSW 9 | W 3 | WSW 8 | WSW 4 | WSW 9 |
| kJ | 46 | 5 | 225 | 234 | 8 | 106 | 54 | 13 | 23 | 18 | 18 | 16 | 8 | 6 | 6 | 7 | 8 | 1 | 7 | 1 | 326 |
Swell 2 Height (m) Direction Period (s) | SW 16 | — | SW 16 | SW 15 | — | SW 14 | — | WSW 6 | SW 13 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | WSW 9 | — | W 8 | — |
| kJ | 11 | — | 10 | 8 | — | 8 | — | 7 | 7 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | — | 5 | — |
Swell 3 Height (m) Direction Period (s) | W 16 | — | — | W 15 | — | SW 14 | SW 13 | SW 13 | SW 16 | SW 15 | — | — | — | — | — | — | — | SW 13 | SW 13 | W 10 | — |
| kJ | 5 | — | — | 4 | — | 8 | 7 | 7 | 10 | 9 | — | — | — | — | — | — | — | 7 | 7 | 2 | — |
Wind waves Height (m) Direction Period (s) | — | WSW 5 | — | W 7 | W 8 | NNW 4 | — | NW 2 | NW 4 | — | NW 4 | — | — | — | NNW 3 | — | — | — | — | — | SSE 4 |
| kJ | — | 75 | — | 150 | 233 | 3 | — | 1 | 3 | — | 1 | — | — | — | 1 | — | — | — | — | — | 17 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 438 | 320 | 49 | 48 | 0 | 0 | 1 | 20 | 287 | 14 | 20 | 85 | 85 | 189 | 134 | 318 | 363 | 318 | 72 | 19 | 14 |
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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