
Surf Forecasts:
The Boiler surf forecast from 12 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 7PM (local time) - 3.5ft (1.1m), 10s period, W swell with 240 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s 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 12) at 10PM. The primary swell is predicted to be 0.7m and 9s period. 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 1.1m 10s and forecast to arrive on Thursday (Aug 13) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 15) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 10PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 7PM (Thu 13th Aug) | 3.5ft (1.1m) 10s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let's chew the fat on what's happening at The Boiler for the next couple of weeks.
I'm gonna level with you, this is a grim outlook. The Boiler is an inconsistent reef, and for the whole 16 days, there's hardly a single moment that's worth paddling out for. The first couple of weeks of August are a total dud, and the dry spell stretches right through to the end of the month.
Let's run through it. From Wednesday the 12th through Sunday the 16th, we're looking at pathetic, tiny waves. The swell is barely 2 feet, with a period of 7 to 10 seconds, so it's gutless. The combined wave energy is a whisper, with numbers like 59 and 11 (that's weak energy). The wind is a mess, mostly cross-onshore or choppy, so it's not even clean. It's a total write-off.
Monday the 17th is even worse. The swell drops to a laughable 0.7ft, and the energy is down to 4. You're looking at a flat ocean.
There's a tiny bump on Tuesday the 18th, with the swell getting up to 4ft to 5ft, but the period is a miserable 6 seconds. That's nothing but short-period wind chop, and with cross-onshore winds, it'll be a lumpy, messy bowl. The energy climbs to 145 (moderate), but it's just not quality surf.
The only day that even looks like a session is Thursday the 20th of August. The swell peaks at 6ft from the west, with a slightly better 8-second period. The combined energy jumps up to 418 (strong). The wind is a fresh cross-offshore from the NW, which keeps the surface clean. Now, this is your best bet. But 6ft at a reef with that short period is going to be a bit of a washing machine. It's doable for a confident intermediate, but it's not a classic. It's the best we've got, but it's a low bar.
After that, it all fades out. Friday the 21st drops back to 2ft with a long 10-second period, but then the wind swings onshore. The last week of the month is rough again, with the 27th of August showing a 7ft swell from the WSW, but it's blown out by a fresh cross-onshore. The energy is huge at 602 (strong to very strong), but it's a messy, blown-out mess, only for the hardcore.
My honest take, mate? Leave the wax in the car. The only real chance is that Thursday the 20th, and even that's a gamble with the short period. For a break that's already inconsistent, this is a long, quiet spell. Forecasts can turn, but right now, I wouldn't be rushing out the door.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Wed afternoon, min 18°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sun afternoon, min 12°C on Sat night). Winds decreasing (fresh winds from the NNW on Sat afternoon, calm by Mon morning). | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 10 | WSW 10 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 7 | W 8 | W 8 | WSW 8 | WSW 7 | WSW 7 | WSW 7 | W 7 | W 7 | WSW 8 | WSW 6 | WSW 6 | W 7 |
Wave Graph | |||||||||||||||||||||
58 | 74 | 94 | 149 | 176 | 98 | 84 | 80 | 32 | 29 | 29 | 19 | 11 | 10 | 5 | 4 | 4 | 13 | 86 | 139 | 203 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross | cross | cross-off | cross-off | cross-off | off | off | cross-off | off | off | cross-on | off | off | cross-off | cross-off | cross-on | cross-on | cross |
High Tide | 6:47AM9.10m | 7:08PM9.53m | 7:37AM9.48m | 7:55PM9.82m | 8:21AM9.64m | 8:38PM9.89m | 9:01AM9.60m | 9:16PM9.76m | 9:37AM9.39m | 9:51PM9.46m | 10:10AM9.04m | 10:23PM9.02m | 10:41AM8.59m | 10:55PM8.48m | |||||||
Low Tide | 12:53PM1.33m | 1:26AM1.04m | 1:41PM1.00m | 2:12AM0.82m | 2:23PM0.87m | 2:52AM0.81m | 3:01PM0.92m | 3:27AM0.99m | 3:34PM1.13m | 3:57AM1.32m | 4:04PM1.48m | 4:25AM1.75m | 4:35PM1.94m | ||||||||
5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | |
— | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 31 | 26 | 25 | 25 | 20 | 21 | 21 | 17 | 19 | 19 | 15 | 18 | 20 | 16 | 15 | 16 | 15 | 18 | 19 | 17 |
Feels °C | 23 | 27 | 25 | 22 | 22 | 20 | 19 | 19 | 14 | 13 | 13 | 10 | 16 | 17 | 13 | 15 | 14 | 13 | 16 | 16 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | WSW 9 | WSW 10 | W 10 | WSW 10 | WSW 9 | WSW 9 | W 7 | W 8 | W 8 | WSW 8 | WSW 7 | WSW 7 | NNW 3 | W 7 | W 7 | WSW 8 | W 16 | W 17 | W 7 |
58 | 74 | 94 | 149 | 127 | 98 | 84 | 80 | 32 | 29 | 29 | 19 | 11 | 10 | 1 | 4 | 4 | 13 | 5 | 6 | 203 | |
Swell 2 Height (m) Direction Period (s) | SW 6 | — | — | — | — | WNW 4 | — | — | WSW 8 | W 10 | — | WNW 4 | NNW 3 | — | WSW 7 | — | — | — | W 17 | — | SW 17 |
1 | — | — | — | — | 4 | — | — | 22 | 2 | — | 2 | 1 | — | 5 | — | — | — | 5 | — | 12 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 11 | — | — | — | — | — | WNW 4 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | 2 | — | — | — | — | — | 1 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SE 3 | — | — | WSW 10 | WSW 4 | W 4 | WSW 4 | NW 3 | NNW 4 | NW 4 | NNW 4 | — | — | — | — | — | WSW 3 | WSW 6 | WSW 6 | — |
— | 1 | — | — | 176 | 4 | 3 | 7 | 3 | 5 | 23 | 6 | — | — | — | — | — | 3 | 86 | 139 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 45 | 20 | 0 | 0 | 320 | 0 | 0 | 25 | 139 | 394 | 399 | 275 | 401 | 421 | 386 | 394 | 318 | 72 | 74 | 182 | 419 |
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.











