Surf Forecasts:
The Boiler surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 10AM (local time) - 5.5ft (1.7m), 14s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 10PM (local time) - 6.5ft (2.0m), 12s period, WSW swell with 1,084 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 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 Saturday (Sep 05) at 10PM. The primary swell is predicted to be 0.7m and 10s period with a secondary swell of 0.1m and 13s. 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 2.0m 12s and forecast to arrive on Monday (Sep 07) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Friday (Sep 11) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sat 5th Sep) | 2.5ft (0.7m) 10s |
| Best Surf | 10AM (Mon 7th Sep) | 5.5ft (1.7m) 14s |
| Most Powerful | 10PM (Mon 7th Sep) | 6.5ft (2.0m) 12s |
Table - best surf conditions forecast for The Boiler over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the next 16 days for The Boiler. It’s a reef setup, intermediate territory, and it’s inconsistent, so we’re not talking about a spot that fires every time the wind blows. The water is sitting at 67° right now, which is a whopping 6° warmer than normal for this time of year – that’s seriously unusual, more like a late summer holdover than early September.
The first real chance of a wave shows up on Saturday the 5th, but it’s nothing to write home about. Saturday morning we’ve got a 3ft swell from the west with a short 7-second period. The combined energy is weak at 131. The wind is cross-off from the WNW at 9 mph, so the surface is clean, but the waves are ordinary. Saturday afternoon drops off to 3ft, and the wind swings cross-on, making it a complete write-off. Sunday the 6th is even smaller, with a choppy cross-on breeze. Honestly, the first few days are mostly a bust.
Now, here’s where it gets interesting. Monday the 7th morning is a real standout. The swell jumps to 6ft from the WSW, and the period stretches way out to 14 seconds – that’s proper groundswell. The combined energy is a massive 1353, which is strong to very strong. The wind is cross-off from the WNW at 9 mph, keeping it clean. This is excellent surf for experienced surfers. The only thing to remember is that a long-period swell like this can break a bit too straight on a typical beach break, but The Boiler is a reef, so it should handle that energy well, offering better shaped waves and longer gaps between sets. Monday afternoon, the wind picks up to 19 mph and goes cross-shore, so the morning is the only window.
Tuesday the 8th morning still has some decent size at 5ft, with a 10-second period and cross-off wind. The energy is still high at 890. It’s a marginal call, but it’s clean. After that, things drop off quickly. From Wednesday the 9th all the way through to the end of the forecast on the 20th, it’s a long, dry stretch. The swell fades to under 3ft, and most days are either cross-on, onshore, or just plain weak. The 16-day window is basically a one-hit wonder: Monday the 7th morning is the best on offer, and after that, it’s a two-week gap of nothing worth paddling out for.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Mon night. Warm (max 22°C on Sun morning, min 14°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the WSW by Mon night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Thu night. Very mild (max 16°C on Tue morning, min 12°C on Tue night). Winds increasing (calm on Thu morning, fresh winds from the SSW by Thu night). | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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 7 | WSW 7 | WSW 9 | WSW 9 | WSW 6 | WSW 7 | WSW 14 | WSW 13 | WSW 7 | WSW 10 | WSW 10 | W 6 | W 6 | W 6 | WSW 8 | WSW 5 | WSW 6 | WSW 8 | WSW 9 | WSW 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 94 | 65 | 68 | 62 | 55 | 73 | 1049 | 1025 | 445 | 473 | 363 | 62 | 66 | 62 | 19 | 25 | 75 | 223 | 121 | 105 | 127 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-off | glassy | cross-on | cross-on | cross-off | cross-off | cross-off |
High Tide | 12:36PM7.40m | 1:34AM7.19m | 2:22PM7.24m | 3:19AM7.32m | 3:58PM7.71m | 4:43AM7.95m | 5:11PM8.48m | 5:45AM8.68m | 6:07PM9.17m | 6:36AM9.24m | 6:54PM9.63m | 7:20AM9.57m | 7:36PM9.85m | ||||||||
Low Tide | 6:51PM3.32m | 7:47AM3.49m | 8:54PM3.32m | 9:37AM3.19m | 10:26PM2.71m | 10:56AM2.48m | 11:34PM1.96m | 11:54AM1.77m | 00:27AM1.35m | 12:42PM1.26m | 1:11AM0.99m | 1:23PM0.98m | 1:50AM0.87m | ||||||||
 |  |  | | | |  | |  | | |  | | | | | |  |  | | | |
 | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — |
 | — | 7:53 | — | — | 7:52 | — | — | 7:50 | — | — | 7:47 | — | — | 7:45 | — | — | 7:43 | — | — | 7:40 | — |
mm | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | 2 | 2 | — | — |
Temp °C | 16 | 16 | 16 | 22 | 22 | 18 | 16 | 17 | 16 | 16 | 16 | 15 | 16 | 16 | 14 | 15 | 16 | 15 | 17 | 16 | 14 |
Feels °C | 13 | 13 | 14 | 19 | 21 | 17 | 14 | 12 | 10 | 11 | 10 | 12 | 13 | 12 | 11 | 13 | 14 | 13 | 13 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | W 7 | WSW 7 | WSW 9 | WSW 9 | SW 13 | WSW 17 | WSW 14 | — | W 12 | W 10 | — | WSW 9 | WSW 9 | WSW 9 | W 6 | WSW 7 | W 11 | WSW 8 | WSW 9 | WSW 8 | W 8 |
| kJ | 94 | 65 | 68 | 62 | 6 | 28 | 1049 | — | 330 | 417 | — | 62 | 25 | 7 | 17 | 17 | 2 | 223 | 121 | 105 | 127 |
Swell 2 Height (m) Direction Period (s) | WSW 9 | SW 14 | SW 13 | SW 13 | — | — | WSW 14 | — | — | — | — | WSW 9 | — | — | WSW 8 | W 12 | W 11 | W 10 | — | — | — |
| kJ | 29 | 7 | 7 | 7 | — | — | 304 | — | — | — | — | 45 | — | — | 19 | 3 | 2 | 32 | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 12 | — | — | — | — | — |
| kJ | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | WSW 6 | — | — | WSW 6 | WSW 7 | — | WSW 13 | WSW 7 | WSW 10 | WSW 10 | W 6 | W 6 | W 6 | — | WSW 5 | WSW 6 | — | W 5 | W 6 | — |
| kJ | — | 28 | — | — | 55 | 73 | — | 1025 | 445 | 473 | 363 | 57 | 66 | 62 | — | 25 | 75 | — | 47 | 91 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 133 | 19 | 253 | 182 | 122 | 0 | 138 | 278 | 136 | 48 | 0 | 0 | 275 | 14 | 6 | 122 | 67 | 129 | 360 | 0 |
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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