Surf Forecasts:
The Boiler surf forecast from 28 Aug 2026:
- Best quality surf: Saturday 29 Aug, 4PM (local time) - 3ft (0.9m), 7s period, SW swell with offshore winds.
- Most powerful swell: Monday 31 Aug, 4AM (local time) - 8ft (2.5m), 9s period, WSW swell with 951 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 4PM (local time) - 3ft (0.9m), 7s 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 Saturday (Aug 29) at 4PM. The primary swell is predicted to be 0.9m and 7s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at The Boiler in the next 16 days are 2.5m 9s and forecast to arrive on Monday (Aug 31) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Saturday (Aug 29) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sat 29th Aug) | 3ft (0.9m) 7s |
| Best Surf | 4PM (Sat 29th Aug) | 3ft (0.9m) 7s |
| Most Powerful | 4AM (Mon 31st Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it.
It’s a rough outlook for The Boiler, the only break in the game. For the first week, the wind is the enemy. The water is a warm 69°, which is running much warmer than average for this time of year by over 7°, so that’s something to note.
Starting off Friday the 28th of August and through the weekend, it’s poor. Fresh cross-shore winds at 19 mph, rain, and the swell is short-period (5-6 seconds). The combined energy is weak (83 on Friday morning). Not worth a look.
Saturday the 29th afternoon gives a tiny window. The wind turns light offshore from the NNW at 6 mph, with 3ft swell from the SW at 7 seconds. The energy is low at 76, but it’ll be clean. Surfable, but very ordinary.
Sunday the 30th sees a moderate energy pulse (273) with 4ft from the WSW, but a moderate cross-onshore wind ruins it. Monday morning the 31st is the pick of the bunch: 7ft from the WSW, 9-second period, strong energy at 1097, and a cross-off breeze from the WNW at 16 mph keeping it clean. That’s solid size for a reef, so it’s for intermediates up. Crowds are sometimes a factor here.
After that, the wind gets nasty through Thursday the 3rd of September, with gusts up to 25 mph, cross-on or onshore, and the swell sits around 5ft to 6ft. The energy is moderate to strong (430), but it’s messy.
Friday the 4th of September morning gives a gentler cross-off from the NW at 9 mph, with 4ft from the WSW. Clean, but ordinary.
The second week goes flat. Swell drops below 3ft, energy is low (under 100), and the wind is mixed. Monday the 7th of September morning is glassy with 3ft from the W, but the period is 5 seconds and energy is just 37. Not worth it.
By the 12th of September, the swell tries to build to 6ft to 7ft from the WSW, but the wind is a near gale at 31 mph, cross-shore, and it’s blown out. The energy is strong (387-532), but unrideable.
The standout? Monday the 31st of August morning – 7ft SW swell, clean cross-off wind, and solid energy. That’s your best bet. The rest is a struggle. Keep your hopes up, the forecast can change.
Rusty.
Short Range ForecastHeavy rain (total 36mm), heaviest during Sun afternoon. Very mild (max 19°C on Sat afternoon, min 15°C on Sun afternoon). Winds increasing (light winds from the NNW on Sat afternoon, fresh winds from the SW by Sun night). | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Wed morning. Very mild (max 19°C on Wed night, min 15°C on Tue night). Winds increasing (light winds from the WNW on Mon night, fresh winds from the SW by Wed night). | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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 5 | WSW 6 | SW 6 | SW 6 | SW 7 | WSW 10 | WSW 9 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 10 | WSW 6 | W 8 | WSW 7 | WSW 5 | WSW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 83 | 119 | 85 | 51 | 75 | 551 | 273 | 365 | 908 | 641 | 579 | 276 | 51 | 32 | 43 | 51 | 134 | 789 | 414 | 370 | 344 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | off | cross | cross-on | on | cross | cross-off | cross | cross | cross | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:36PM9.33m | 7:53AM9.20m | 8:09PM9.52m | 8:25AM9.34m | 8:42PM9.58m | 8:57AM9.36m | 9:15PM9.49m | 9:28AM9.22m | 9:48PM9.24m | 10:01AM8.93m | 10:23PM8.83m | 10:38AM8.51m | 11:04PM8.29m | ||||||||
Low Tide | 1:22PM1.53m | 1:41AM1.29m | 1:53PM1.31m | 2:12AM1.13m | 2:23PM1.21m | 2:43AM1.09m | 2:54PM1.23m | 3:14AM1.21m | 3:24PM1.39m | 3:45AM1.48m | 3:57PM1.70m | 4:20AM1.90m | 4:35PM2.16m | ||||||||
 | |  |  |  |  | | |  |  |  | | | | |  | | | | |  | |
 | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — |
 | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:06 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — |
mm | 3 | 2 | 4 | 7 | — | — | 2 | 13 | 5 | — | — | 1 | 1 | — | 1 | 2 | 4 | 2 | — | 1 | 1 |
Temp °C | 18 | 18 | 17 | 18 | 19 | 17 | 19 | 17 | 16 | 17 | 17 | 16 | 17 | 17 | 17 | 16 | 16 | 19 | 19 | 19 | 18 |
Feels °C | 14 | 14 | 14 | 16 | 19 | 15 | 14 | 11 | 10 | 12 | 13 | 14 | 15 | 12 | 15 | 15 | 11 | 15 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | — | — | WSW 6 | SW 6 | SW 7 | WSW 10 | WSW 9 | WSW 8 | — | WSW 9 | — | WSW 10 | WSW 6 | W 8 | SW 16 | SW 16 | — | — | SW 15 | SW 15 | SW 15 |
| kJ | — | — | 52 | 51 | 75 | 551 | 273 | 256 | — | 641 | — | 276 | 51 | 32 | 10 | 10 | — | — | 8 | 9 | 9 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | ESE 3 | — | — | — | — | — | — | — | W 9 | W 18 | W 16 | W 16 | — | — | SW 15 | — | W 15 |
| kJ | — | — | — | — | 1 | — | — | — | — | — | — | — | 39 | 6 | 5 | 5 | — | — | 8 | — | 17 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SE 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 5 | WSW 6 | SW 6 | SE 3 | — | — | — | WSW 8 | WSW 8 | WSW 9 | WSW 9 | — | — | WSW 6 | WSW 7 | WSW 5 | WSW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 |
| kJ | 83 | 119 | 85 | 3 | — | — | — | 365 | 908 | 456 | 579 | — | — | 18 | 43 | 51 | 134 | 789 | 414 | 370 | 344 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 318 | 396 | 275 | 187 | 0 | 48 | 67 | 361 | 82 | 644 | 49 | 48 | 0 | 360 | 232 | 360 | 437 | 320 | 320 | 367 | 144 |
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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