The Boiler Surf Break

Lat Long: 51.56° N 4.02° W

The Boiler Surf Forecast and Surf Report

Issued: 6 pm 27 Aug 2026 (local time)

Forecast update in  hr  min

Today's The Boiler sea temperature is
20.1°C
3.9° 

The Boiler surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


The Boiler surf forecast from 27 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 10PM (local time) - 3.5ft (1.0m), 5s period, W swell with cross-offshore winds.
  • Most powerful swell: Sunday 30 Aug, 1AM (local time) - 6.5ft (2.0m), 10s period, WSW swell with 687 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 10PM (local time) - 3.5ft (1.0m), 5s period with W 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 Tuesday (Sep 01) at 10PM. The primary swell is predicted to be 1.0m and 5s period with a secondary swell of 0.1m and 17s. Another secondary swell of 0.1m and 16s is also forecast. 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 2.0m 10s and forecast to arrive on Sunday (Aug 30) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Tue 1st Sep)3.5ft (1.0m) 5s
Best Surf10PM (Tue 1st Sep)3.5ft (1.0m) 5s
Most Powerful 1AM (Sun 30th Aug)6.5ft (2.0m) 10s

Table - best surf conditions forecast for The Boiler over the next 16 days.


The Lowdown

G’day, Rusty here. Look, I’ll be straight with you – the next couple of weeks at The Boiler are a mixed bag. We’ve got a long stretch of pretty ordinary conditions before a real standout shows up in the second week. The water is sitting at a very unusual 68°, which is much warmer than normal for this time of year – that’s over five degrees above average, so you’ll notice it.

The Boiler is a reef break, and it’s inconsistent, so it only fires when everything lines up. For the rest of Thursday the 27th into Friday the 28th, we’ve got tiny, weak swell around 0.7ft to 5ft with short period (6-7 seconds) and poor wind. The combined energy is weak to moderate (6 to 138), and conditions are lumpy, cross-shore, or onshore. Nothing to get excited about.

Saturday the 29th and Sunday the 30th see a bit more push, with swell heights up to 5ft from the SW/WSW, period lengthening to 9 seconds, and energy climbing into the moderate range (112 to 311). But wind is still cross-onshore or messy, keeping surf quality poor. Monday the 31st morning shows a glimmer – clean, cross-off wind with 5ft SW swell at 10 seconds, and energy at 471 – but it’s only rated marginal. The afternoon gets lumpy again.

Then we hit a dry spell. From Tuesday the 1st to Saturday the 6th of September, swell drops way down – under 3ft, periods short, and energy bottoming out (31 to 316). Most days are cross-onshore or lumpy, with a few clean moments that still offer nothing in the water. That’s a solid five days of nothing worth paddling for.

Now, the real standout is Monday the 7th of September morning. We’ve got a solid 10ft swell from the W at 9 seconds, with light offshore wind from the NW – clean conditions. The combined energy is a massive 1271, so there’s serious power in the water. That’s a big swell, well over 8ft, so this is expert territory only. It’s a reef break, so the long period (9 seconds) will hold up well. The wind is offshore, so expect clean, lined-up waves. Mark that date.

After that, Monday afternoon the 7th drops to 5ft with cross-on wind, and from Tuesday the 8th onward it’s back to small, weak swells (2ft to 6ft) with mixed conditions. The 11th of September Friday offers a couple of sessions with 6ft swell from the WSW, period 7-8 seconds, and fresh offshore wind from the N/NNW, giving clean waves. Energy is moderate (364 to 409), but it’s not the same quality as the 7th.

So, the one to circle is Monday the 7th of September morning. The Boiler will be pumping, but only for the experienced crew. The rest of the window is mostly a write-off, though the 11th might offer a salvage session.

Rusty.

Short Range Forecast

Heavy rain (total 26mm), heaviest during Sat morning. Warm (max 20°C on Thu afternoon, min 16°C on Sat night). Winds increasing (light winds from the SW on Thu night, strong winds from the W by Sat afternoon).

Days 5-7 Weather Summary

Moderate rain (total 12mm), heaviest on Sun night. Very mild (max 18°C on Sun afternoon, min 15°C on Sun night). Winds decreasing (fresh winds from the SSW on Sun afternoon, light winds from the WNW by Tue night).

Thu
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
W
7
0.4
SW
6
1.5
SW
6
1.8
SW
6
1.2
WSW
6
1.2
SW
6
1.1
SW
7
2
WSW
10
1.4
WSW
9
1.3
WSW
9
1.4
WSW
8
1.6
WSW
10
1.5
WSW
10
1.1
WSW
9
0.9
WSW
6
1
W
6
1
W
6
0.7
WSW
6
0.5
W
6
0.7
WSW
3
Wave Graph
Metric surfscale
Energy kJ
4
15
138
239
103
106
112
687
311
280
250
471
416
206
64
66
69
35
16
10
Wind (km/h)
15
WSW
15
WSW
30
WSW
30
WSW
20
SW
35
SSW
30
WNW
25
W
25
SSW
30
SW
25
W
20
WNW
25
W
20
W
30
WSW
30
WSW
10
WNW
10
NW
15
WSW
20
SW
Wind State
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-off
cross
cross-on
cross-on
cross
cross-off
cross
cross
cross
cross
cross-off
cross-off
cross
cross-on
High Tide
7:02PM9.05m
7:20AM8.96m
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
Low Tide
1:08AM1.55m
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
thunderstorm
thunderstorm
thunderstorm
rain showers
rain showers
mod rain
rain showers
clear
rain showers
thunderstorm
thunderstorm
cloud
cloud
part cloud
clear
rain showers
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:22
6:24
6:24
6:26
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:14
8:12
8:09
8:07
8:06
8:02
8:00
 mm
1
2
4
3
5
8
1
2
3
6
3
Temp °C
20
18
18
18
17
18
18
16
19
18
16
16
17
16
17
17
17
17
17
17
Feels °C
19
18
14
14
15
14
14
12
16
13
12
12
12
13
12
13
16
15
15
16
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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