Surf Forecasts:
The Boiler surf forecast from 23 Aug 2026:
- Best quality surf: Thursday 27 Aug, 10PM (local time) - 3.5ft (1.0m), 8s period, SW swell with glassy winds.
- Most powerful swell: Saturday 29 Aug, 10PM (local time) - 7.5ft (2.3m), 8s period, WSW swell with 636 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 10PM (local time) - 3.5ft (1.0m), 8s period with SW 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 27) at 10PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.1m and 12s. Another secondary swell of 0.2m and 2s is also forecast. 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 2.3m 8s and forecast to arrive on Saturday (Aug 29) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 27th Aug) | 3.5ft (1.0m) 8s |
| Best Surf | 10PM (Thu 27th Aug) | 3.5ft (1.0m) 8s |
| Most Powerful | 10PM (Sat 29th Aug) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, let’s cut to the chase. The Boiler is looking like a long, dry spell for the next 16 days. There’s a big gap of nothing but tiny, choppy junk from now until the 4th of September. The first real hint of anything surfable is on Friday morning, the 4th of September, and it’s still a bit of a gamble.
The Boiler (reef) is inconsistent at the best of times, and the water’s sitting at a notably warm 69°, which is much warmer than normal for this time of year. Nice for a dip, but not for the waves.
From the 23rd of August through to the 3rd of September, it’s basically a flat spell. We’re talking tiny, short-period slop, with messy cross-shore winds and poor surf conditions. The only bright spot is that glassy, calm Sunday afternoon on the 23rd, but with a swell height of just 0.3ft, you’re not going anywhere. There’s a brief pulse of moderate wave energy on the morning of the 27th of August, but it’s cross-on and choppy. The 29th of August sees a jump in swell height to 4ft-7ft, but the wind is a fresh-to-strong cross-onshore, turning it into a lumpy mess. The 30th is similar, with strong winds and messy cross-chop. The 31st of August cleans up with cross-offshore winds, but the swell drops back to 2ft-2ft. Not worth paddling out for.
Now, the one real hope in this window is Friday morning, the 4th of September. The swell jumps to 8ft from the WSW, with a period of 9 seconds, giving us strong wave energy. The wind is a gentle cross-shore, so it’ll be a bit bumpy but not completely blown out. This is the best on offer, but it’s still a marginal forecast. The afternoon of the 4th drops to 6ft with a light cross-on, so it’ll be a bit scratchy. The 5th and 6th of September bring similar-sized swell, but the wind turns onshore again, making it lumpy. Then on the 7th of September, the swell gets serious with a 10ft to 12ft groundswell from the WSW, but the wind is a strong cross-shore and the wave energy is massive. That’s big, powerful, and messy – experts only, and even then, it’s going to be a battle.
So, the only true standout is the morning of the 4th of September. Get out there if you can, but don’t expect perfection. The rest of the window is a long stretch of waiting for something better.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue night. Warm (max 25°C on Tue afternoon, min 14°C on Sun night). Winds increasing (calm on Sun afternoon, fresh winds from the E by Mon night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Wed night. Warm (max 22°C on Wed afternoon, min 15°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the WNW by Fri afternoon). | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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) | W 9 | W 9 | WSW 10 | WSW 9 | E 4 | E 4 | E 4 | E 3 | W 10 | W 9 | W 8 | W 8 | SW 8 | SW 7 | SW 8 | WSW 7 | WSW 7 | WSW 10 | WSW 8 | WSW 7 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 7 | 20 | 8 | 9 | 13 | 13 | 5 | 7 | 14 | 12 | 10 | 109 | 102 | 93 | 44 | 48 | 483 | 216 | 392 | 636 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-off | cross | cross | cross-off | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross-on | glassy | cross | cross | cross | cross-on | cross-on | cross |
High Tide | 3:48PM7.01m | 4:21AM7.06m | 4:55PM7.57m | 5:22AM7.63m | 5:45PM8.16m | 6:07AM8.18m | 6:26PM8.66m | 6:45AM8.62m | 7:02PM9.05m | 7:20AM8.96m | 7:36PM9.33m | 7:53AM9.20m | 8:09PM9.52m | ||||||||
Low Tide | 10:00PM3.49m | 10:37AM3.32m | 11:04PM2.94m | 11:31AM2.75m | 11:52PM2.38m | 12:13PM2.23m | 00:32AM1.92m | 12:49PM1.83m | 1:08AM1.55m | 1:22PM1.53m | 1:41AM1.29m | 1:53PM1.31m | 2:12AM1.13m | ||||||||
 | |  |  | |  | |  |  | | | | | | | |  |  | | |  | |
 | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — |
 | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | 10 | — | — | — | — | 1 | 1 | 3 | 4 | 6 |
Temp °C | 18 | 21 | 19 | 20 | 23 | 19 | 22 | 25 | 17 | 19 | 22 | 17 | 18 | 19 | 17 | 18 | 19 | 17 | 17 | 17 | 17 |
Feels °C | 16 | 18 | 16 | 14 | 18 | 11 | 17 | 21 | 16 | 19 | 21 | 16 | 17 | 18 | 17 | 17 | 16 | 14 | 13 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | WSW 10 | WSW 9 | W 9 | W 9 | W 8 | W 8 | W 10 | SW 4 | SW 4 | W 8 | WSW 8 | SW 7 | SW 8 | WSW 7 | SW 11 | WSW 10 | WSW 8 | — | — |
| kJ | 6 | 6 | 20 | 8 | 2 | 6 | 1 | 1 | 7 | 4 | 2 | 10 | 26 | 102 | 93 | 44 | 5 | 483 | 216 | — | — |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | W 10 | SW 9 | SW 13 | SW 9 | SW 8 | SW 8 | W 9 | W 8 | SW 7 | W 7 | WSW 10 | W 12 | SW 12 | W 12 | — | — | — | — |
| kJ | 8 | 7 | 8 | 2 | 3 | 7 | 3 | 3 | 3 | 14 | 12 | 2 | 4 | 10 | 3 | 6 | 3 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 15 | — | — | SW 14 | SW 14 | S 9 | SW 13 | W 10 | SW 13 | SW 8 | SW 7 | W 12 | — | W 12 | W 10 | W 9 | — | — | — | — | — |
| kJ | 8 | — | — | 8 | 8 | 1 | 7 | 2 | 7 | 2 | 2 | 3 | — | 3 | 2 | 2 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | E 3 | E 4 | E 4 | E 4 | E 3 | SE 3 | — | — | S 4 | SW 8 | — | — | — | WSW 7 | — | — | WSW 7 | WSW 8 |
| kJ | — | — | — | 4 | 9 | 13 | 13 | 5 | 2 | — | — | 4 | 109 | — | — | — | 48 | — | — | 392 | 636 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 72 | 126 | 14 | 394 | 394 | 319 | 134 | 324 | 154 | 135 | 72 | 162 | 125 | 19 | 0 | 18 | 120 | 133 | 365 | 394 | 448 |
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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