Surf Forecasts:
The Boiler surf forecast from 13 Aug 2026:
- Best quality surf: Thursday 13 Aug, 10PM (local time) - 2.5ft (0.7m), 10s period, WSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 18 Aug, 10AM (local time) - 4.5ft (1.4m), 7s period, W swell with 176 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 10PM (local time) - 2.5ft (0.7m), 10s 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 Thursday (Aug 13) at 10PM. The primary swell is predicted to be 0.7m and 10s period with a secondary swell of 0.5m and 4s. 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 7s and forecast to arrive on Tuesday (Aug 18) at 10AM. 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 (Thu 13th Aug) | 2.5ft (0.7m) 10s |
| Best Surf | 10PM (Thu 13th Aug) | 2.5ft (0.7m) 10s |
| Most Powerful | 10AM (Tue 18th Aug) | 4.5ft (1.4m) 7s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s be straight about this one. For the next 16 days, don't get your hopes up at The Boiler. The outlook is grim.
We kick things off on Thursday the 13th of August, and it’s a write-off. There’s a bit of swell around 3ft from the WSW with a period of 10 seconds, but the wind is all wrong—cross-shore and then cross-onshore. The water temp is sitting at 69°, which is a wild 7° warmer than usual for this time of year, so that’s a bit of a surprise, but it won’t help the waves. Friday gets even smaller, dropping to 2ft, and the cross-shore wind keeps things messy. Saturday morning goes offshore with clean conditions, but the swell is a tiny 1ft with a short 8-second period and weak energy. You might get a knee-high dribble if you’re desperate.
Sunday the 16th is a tease. Glassy conditions in the morning with the wind swinging light and easterly, but the swell is just 1ft. It’s a flat, clean pond. Monday is even smaller. This quiet run lasts right through to the middle of the following week.
The first bump of real interest comes Tuesday the 18th. Swell jumps to 5ft from the west, but the period is a short 7 seconds. The energy is moderate, but the wind is cross-offshore in the morning, so it’s clean. Still, the quality is flagged as poor. That’s the best I can say for it.
Then things flatten out again until Sunday the 23rd of August, when a slightly better 3ft to 3ft SSW swell shows up with a bit more energy. But the wind is cross-onshore, so it’s choppy.
The tail end of the outlook, around Thursday the 27th and Friday the 28th, shows some clean cross-offshore winds and a bit of swell picking up to 4ft on the 27th afternoon, but again, short period (7-9 seconds) and poor quality flagged.
Honestly, this whole 16-day run is a bust. The Boiler is inconsistent and rarely breaks well, and this window proves it. There are no standouts. If you’re a kite surfer, some of those days with 15-18 mph cross-shore winds and a bit of chop might look fun, but for paddle surfing, you’re better off finding something else to do.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Thu morning, min 13°C on Sat night). Winds increasing (light winds from the WNW on Thu night, fresh winds from the NNW by Sat afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sun afternoon, min 15°C on Sun morning). Winds increasing (calm on Sun morning, fresh winds from the WSW by Tue afternoon). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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 10 | WSW 9 | WSW 9 | W 8 | WSW 8 | W 7 | WSW 8 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 7 | WSW 4 | W 7 | WSW 7 | W 6 | W 6 | W 6 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 149 | 143 | 98 | 64 | 61 | 48 | 22 | 40 | 19 | 11 | 10 | 5 | 5 | 4 | 16 | 176 | 135 | 84 | 76 | 39 | 15 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | cross-off | cross | cross | off | off | cross-off | off | glassy | cross | cross-off | glassy | cross | cross-on | cross-off | cross-on | cross | cross-off | cross | off |
High Tide | 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 | 11:12AM8.06m | 11:28PM7.89m | ||||||||
Low Tide | 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 | 4:54AM2.27m | 5:08PM2.48m | ||||||||
 | |  |  |  | | | |  | | | | | | | | | | | | | |
 | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 20 | 20 | 22 | 18 | 20 | 20 | 15 | 18 | 20 | 16 | 19 | 19 | 18 | 20 | 19 | 18 | 17 | 19 | 17 |
Feels °C | 21 | 22 | 20 | 19 | 21 | 16 | 15 | 14 | 10 | 16 | 15 | 12 | 17 | 17 | 16 | 18 | 16 | 14 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 8 | WSW 8 | W 7 | WSW 8 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 7 | — | W 16 | SW 17 | SW 17 | SW 16 | SW 16 | WSW 5 |
| kJ | 149 | 143 | 98 | 64 | 61 | 48 | 22 | 40 | 19 | 11 | 10 | 5 | 5 | 4 | — | 5 | 11 | 12 | 11 | 10 | 9 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | W 11 | WSW 7 | — | NW 4 | — | — | W 5 | — | W 8 | — | — | — | W 17 | — | W 9 | WSW 7 |
| kJ | — | — | — | — | — | 2 | 5 | — | 1 | — | — | 2 | — | 1 | — | — | — | 6 | — | 2 | 15 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 10 | — | — | — | — | W 5 | — | — | — | — | — | — | — | — | SW 16 |
| kJ | — | — | — | — | — | — | 2 | — | — | — | — | 2 | — | — | — | — | — | — | — | — | 10 |
Wind waves Height (m) Direction Period (s) | — | — | W 3 | — | W 3 | — | NNW 4 | NW 4 | NNW 4 | — | — | NNW 4 | — | — | WSW 4 | W 7 | WSW 7 | W 6 | W 6 | W 6 | — |
| kJ | — | — | 2 | — | 1 | — | 10 | 10 | 5 | — | — | 5 | — | — | 16 | 176 | 135 | 84 | 76 | 39 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 360 | 0 | 19 | 360 | 190 | 394 | 597 | 262 | 398 | 422 | 431 | 306 | 450 | 365 | 141 | 423 | 318 | 190 | 190 | 45 |
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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