Surf Forecasts:
The Boiler surf forecast from 15 Aug 2026:
- Best quality surf: Friday 21 Aug, 1AM (local time) - 2.5ft (0.8m), 6s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 4AM (local time) - 4.5ft (1.4m), 7s period, WSW swell with 186 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 1AM (local time) - 2.5ft (0.8m), 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 Friday (Aug 21) at 1AM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.4m and 9s. 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 Thursday (Aug 20) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Aug 15) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 21st Aug) | 2.5ft (0.8m) 6s |
| Best Surf | 1AM (Fri 21st Aug) | 2.5ft (0.8m) 6s |
| Most Powerful | 4AM (Thu 20th Aug) | 4.5ft (1.4m) 7s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, let’s cut to it. The Boiler is all we got, and it ain’t much. We’re staring down a long stretch of flat and funky conditions that’ll test your patience.
First week, from the 15th to the 20th, it’s a whole lot of nothing. Swell is small, never over 4ft, and the wind is switching around like a bad habit. There’s a clean slot on the morning of the 15th with a light offshore breeze, but the waves are only 1ft at 8 seconds, so it’s not gonna do anything. The morning of the 16th is dead glassy, but again, it’s knee-slappers at 1ft. The rest of the week is cross-shore and cross-onshore junk, with some rain on the 18th and 20th. Water temp is 70° on the 15th, which is a solid 8° above average – that’s crazy warm for this time of year.
Wave energy is weak, mostly in the 20s to 80s. We get a little spike on the 20th with energy hitting 179, but it’s still just a messy 4ft. Not worth a paddle.
The 21st offers a tiny glimmer – morning has a light offshore wind and the surf is 3ft at 7 seconds. It’s the best we’ll see, but it’s still pretty average. The report says “surfable waves but very ordinary conditions.” That’s your highlight.
After that, it’s a slide into the abyss. The 22nd and 23rd have a touch of swell but poor winds. From the 24th through the 30th, it’s basically flat. We’re talking 0.3ft to 2ft at best, with the energy dying down into the single digits and teens. There’s a pretty glassy morning on the 27th, but there’s absolutely nothing to ride. The Boiler is an inconsistent reef even on a good day, and this is far from one.
So, straight up, there’s nothing here that’s worth the drive. Keep the board in the bag, but you might want to rig up the kite – the setup looks more interesting for that than for paddle surfing. This is a dead run, and for this zone, that’s just the way it goes sometimes. Forecasts can shift, but I wouldn't hold your breath.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Sat afternoon, min 14°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Tue night. Warm (max 20°C on Tue afternoon, min 14°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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 8 | W 8 | WSW 7 | WSW 7 | W 7 | WSW 7 | W 5 | W 5 | W 7 | W 6 | WSW 6 | W 6 | WSW 6 | W 6 | WSW 6 | WSW 7 | WSW 7 | WSW 6 | WSW 7 | W 6 | W 8 |
Wave Graph | |||||||||||||||||||||
22 | 29 | 18 | 18 | 27 | 5 | 21 | 27 | 26 | 73 | 56 | 31 | 64 | 66 | 160 | 171 | 118 | 55 | 62 | 38 | 51 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | glassy | cross | cross | cross-off | cross | cross-on | cross | cross-on | off | cross-off | cross | cross | cross | cross | cross-off | off | cross-off | off |
High Tide | 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 | 11:51AM7.51m | 00:13AM7.29m | 12:49PM7.00m | 1:23AM6.79m | ||||||||
Low Tide | 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 | 5:28AM2.83m | 5:52PM3.08m | 6:17AM3.42m | 7:01PM3.61m | ||||||||
6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | |
— | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | |
mm | — | — | — | — | — | — | — | — | — | 2 | — | 5 | — | — | 3 | 1 | — | — | — | 1 | — |
Temp °C | 21 | 22 | 16 | 19 | 19 | 17 | 18 | 18 | 18 | 19 | 20 | 19 | 18 | 18 | 16 | 17 | 17 | 16 | 19 | 20 | 15 |
Feels °C | 20 | 17 | 11 | 15 | 15 | 15 | 18 | 14 | 16 | 18 | 19 | 17 | 12 | 13 | 12 | 14 | 12 | 14 | 16 | 16 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | W 8 | WSW 7 | WSW 7 | — | WSW 7 | W 5 | W 8 | W 7 | W 16 | WSW 6 | SW 17 | SW 16 | SW 16 | SW 16 | WSW 7 | SW 14 | WSW 6 | WSW 7 | WSW 9 | W 8 |
22 | 29 | 18 | 18 | — | 5 | 21 | 6 | 26 | 5 | 56 | 12 | 11 | 10 | 10 | 171 | 8 | 55 | 62 | 25 | 51 | |
Swell 2 Height (m) Direction Period (s) | WSW 8 | — | WNW 4 | NW 4 | — | W 5 | WSW 7 | W 18 | — | — | SW 17 | W 17 | — | W 16 | SW 16 | SW 15 | — | WSW 9 | SW 13 | SW 13 | SW 13 |
6 | — | 1 | 2 | — | 2 | 5 | 6 | — | — | 11 | 6 | — | 5 | 10 | 8 | — | 27 | 7 | 7 | 7 | |
Swell 3 Height (m) Direction Period (s) | W 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SW 16 | SW 16 | SW 16 |
2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 10 | 10 | 10 | |
Wind waves Height (m) Direction Period (s) | NNW 4 | NW 3 | N 4 | — | W 7 | W 3 | — | W 5 | W 5 | W 6 | — | W 6 | WSW 6 | W 6 | WSW 6 | — | WSW 7 | — | NW 3 | W 6 | N 3 |
1 | 5 | 1 | — | 27 | 1 | — | 27 | 13 | 73 | — | 31 | 64 | 66 | 160 | — | 118 | — | 3 | 38 | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 394 | 597 | 262 | 262 | 423 | 440 | 318 | 433 | 320 | 141 | 686 | 190 | 375 | 385 | 365 | 48 | 444 | 0 | 0 | 0 | 0 |
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.











