Surf Forecasts:
The Boiler surf forecast from 9 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 7PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 13 Aug, 10AM (local time) - 3ft (0.9m), 10s period, WSW swell with 158 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 7PM (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 7PM. The primary swell is predicted to be 0.7m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at The Boiler in the next 16 days are 0.9m 10s and forecast to arrive on Thursday (Aug 13) at 10AM. 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 Saturday (Aug 15) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 7PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 10AM (Thu 13th Aug) | 3ft (0.9m) 10s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what we’ve got on the table for The Boiler. It’s a reef setup, a bit inconsistent by nature, so when it’s on, you’ve got to be on it. Water temp is sitting at a very unusual 69.1°, a full 7.9° warmer than what’s normal for this time of year, so you can leave the thick wetsuit at home.
Straight off the bat, I gotta be honest with you, the first week and a half is a write-off. From Saturday the 8th all the way through to the morning of Thursday the 14th, we’re looking at tiny, gutless waves—nothing over 3.0ft—and the wind is all over the shop. The combined swell energy is weak, mostly in the single or double digits (4 to 182), and the wave comments say it all: poor surf conditions. It’s not worth paddling out for.
Thursday morning the 14th is a bit of a tease. The swell bumps up to 3.0ft from the WSW with a period of 10 seconds, giving us a moderate energy reading of 182. The wind is a light cross-onshore, creating small ripples. It’s not bad, but it’s still not good. We get a small window early Saturday morning the 15th: a 2.6ft swell from the WSW, a light offshore breeze from the NW, and clean conditions. The energy is weak at 77, so it's surfable but very ordinary.
Then we hit a real dry spell. From Saturday afternoon the 15th through to Monday the 17th, it’s tiny, choppy, and lumpy. A few clean moments on the Tuesday the 18th and Wednesday the 19th, but the swell is still small and weak. The standouts, if you can call them that, are the mornings of Thursday the 20th and Friday the 21st.
Thursday the 20th morning: a 3.9ft swell from the west, period of 7 seconds. The combined energy hits a moderate 143. The wind is light from the NW, giving us clean, cross-off conditions. It’s not huge, but it’s the biggest, cleanest wave of the whole run.
Friday the 21st morning: a clean 2.3ft west swell with a gentle offshore from the north. The energy is weak at 45, but the wind is offshore and it's clean. The afternoon holds similar, with a moderate offshore breeze.
After that, it fades again into the weekend of the 22nd and 23rd with small, weak, and choppy conditions. A long-period 15-second groundswell shows up on the 23rd, but it’s only 0.3ft and coming in with a cross-onshore breeze, so forget it. The Boiler is an inconsistent spot anyway, so this long flat spell isn't a total surprise. The only real highlight is that Thursday the 20th morning—it’s the best of a pretty quiet bunch.
Short Range ForecastMostly dry. Warm (max 23°C on Tue morning, min 15°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Wed afternoon, min 17°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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) | W 9 | WSW 7 | WSW 7 | WSW 3 | WSW 4 | W 6 | W 5 | WSW 7 | ESE 3 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2 | 5 | 4 | 2 | 4 | 22 | 8 | 4 | 3 | 7 | 25 | 78 | 72 | 84 | 158 | 133 | 125 | 84 | 80 | 33 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | off | cross | cross | cross-off | off | cross | cross-off | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross | cross-off | cross | cross | off |
High Tide | 3:17AM7.49m | 3:58PM7.72m | 4:41AM7.93m | 5:13PM8.36m | 5:50AM8.55m | 6:15PM9.02m | 6:47AM9.10m | 7:08PM9.53m | 7:37AM9.48m | 7:55PM9.82m | 8:21AM9.64m | 8:38PM9.89m | ||||||||
Low Tide | 8:47PM3.09m | 9:32AM2.97m | 10:18PM2.69m | 10:52AM2.46m | 11:32PM2.07m | 11:58AM1.85m | 00:33AM1.47m | 12:53PM1.33m | 1:26AM1.04m | 1:41PM1.00m | 2:12AM0.82m | 2:23PM0.87m | 2:52AM0.81m | |||||||
 |  |  | | |  | | | | | | | | | | |  | | | | |
 | — | — | 5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — |
 | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 20 | 19 | 19 | 17 | 20 | 21 | 19 | 23 | 26 | 23 | 26 | 30 | 26 | 28 | 29 | 20 | 20 | 20 | 17 |
Feels °C | 20 | 17 | 17 | 15 | 15 | 18 | 17 | 16 | 21 | 23 | 21 | 22 | 28 | 24 | 25 | 24 | 19 | 19 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | W 9 | WSW 7 | WSW 7 | W 8 | WSW 4 | W 6 | W 5 | WSW 7 | SW 6 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 9 | W 9 | W 8 |
| kJ | 2 | 5 | 4 | 1 | 4 | 22 | 8 | 4 | 2 | 7 | 25 | 78 | 72 | 84 | 158 | 133 | 125 | 84 | 39 | 33 |
Swell 2 Height (m) Direction Period (s) | SW 8 | W 9 | W 8 | — | SW 6 | W 8 | SW 6 | WNW 4 | W 8 | SW 6 | W 9 | SW 6 | — | — | WSW 11 | — | — | — | — | WSW 4 |
| kJ | 2 | 2 | 1 | — | 1 | 1 | 6 | 2 | 1 | 2 | 2 | 1 | — | — | 24 | — | — | — | — | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 8 | — | W 8 | W 8 | W 10 | W 13 | SW 6 | W 6 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 1 | — | 1 | 1 | 2 | 3 | 1 | 1 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | WSW 3 | — | — | — | — | ESE 3 | ESE 3 | SSE 3 | ESE 2 | — | — | — | — | W 4 | — | WSW 9 | — |
| kJ | — | — | — | 2 | — | — | — | — | 3 | 2 | 1 | 1 | — | — | — | — | 9 | — | 80 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 190 | 189 | 423 | 360 | 274 | 188 | 360 | 134 | 413 | 360 | 14 | 20 | 6 | 1 | 18 | 320 | 0 | 19 | 320 | 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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