The Boiler Surf Break

Lat Long: 51.56° N 4.02° W

The Boiler Surf Forecast and Surf Report

Issued: 12 pm 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's The Boiler sea temperature is
20.2°C
4.0° 

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 25 Aug 2026:

  • Best quality surf: Thursday 27 Aug, 10PM (local time) - 2.5ft (0.8m), 5s period, WSW swell with glassy winds.
  • Most powerful swell: Tuesday 1 Sep, 7PM (local time) - 8ft (2.5m), 8s period, WSW swell with 909 kJ wave energy.
  • Next surfable swell (1★+): Thursday 27 Aug, 10PM (local time) - 2.5ft (0.8m), 5s 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 Thursday (Aug 27) at 10PM. The primary swell is predicted to be 0.8m and 5s period with a secondary swell of 0.5m and 8s. 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 2.5m 8s and forecast to arrive on Tuesday (Sep 01) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Thu 27th Aug)2.5ft (0.8m) 5s
Best Surf10PM (Thu 27th Aug)2.5ft (0.8m) 5s
Most Powerful 7PM (Tue 1st Sep)8ft (2.5m) 8s

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


The Lowdown

G'day, I'm Rusty, and I'm looking at the forecast for The Boiler, and straight up, it's a tough watch. The whole 16-day window is a bit of a write-off for a decent paddle. The water's sitting at 68°, which is a solid 7° warmer than it should be for this time of year – that's a proper anomaly, feels like we're in the tropics.

The first few days from Tuesday the 25th through to the end of the month are a complete no-go. Swell is tiny, mostly under 3 ft, and the wind is all over the shop – cross, cross-on, and messy. The combined energy is weak (23 on Tuesday morning) and it's just a lumpy, choppy mess. Really poor.

We get a bit of a pulse on the weekend of the 29th and 30th, with the swell pushing 8 ft on Saturday morning, but the wind is howling at 25 mph from the WSW, ripping straight onshore. The wave energy is strong (711) but it's blown out and messy. That's more of a kite-surfing scene than a paddle surfer's dream.

The first week of September is more of the same: strong winds, big chop, and the swell sticking around the 6 ft to 8 ft mark. The combined energy gets into the high hundreds (up to 959), but it's all cross-on and messy. The only real glimmer comes on the morning of Friday the 4th of September. We've got a clean 3 ft swell from the west with a gentle cross-offshore breeze. It's surfable, but it's only a 'so-so' kind of wave – the energy is a modest 102. It's a window, but nothing to get excited about.

Then there's a big one brewing for the 5th and 6th of September. The 5th of September morning sees a 8 ft swell from the WSW with a period of 9 seconds, and clean cross-offshore winds. The combined energy jumps to 938, and by the afternoon it's up to a massive 1451 with a 10-second period. That's a powerful, long-period groundswell, which will be lining up well at a reef. The problem is the wind, while clean, is a fresh breeze at 22 mph, so it's gonna be a bumpy ride. Still, this is the standout – the best on offer. It's a serious swell, over 8 ft, so only for the experienced crew. The direction is WSW, which is right in the optimum zone for The Boiler.

The following Monday the 7th of September drops off a bit, with 4 ft to 4 ft, but it's got a very long 12-second period and a strong cross-shore wind. The energy is still solid (478-503), but that long period will make it a bit tricky at a beach break – it'll be better for a reef or point.

The final hope is on the 9th of September. The morning has a clean 4 ft swell from the WSW, period of 11 seconds, and a light cross-offshore breeze. The wave energy is 454, and the conditions are described as clean. That's a solid, fun size for an intermediate, with good shape from the long period. This is the second best on offer, but it's a long way off.

So, to wrap it up: the entire window is pretty grim. The standout is definitely the 5th of September, with that huge, powerful swell, but it's for experts only. The 9th of September morning is a decent backup. Other than that, you're better off cleaning the wax off your board and waiting for a better run. Forecasts can change, but right now, it's a lean spell.

Rusty.

Short Range Forecast

Moderate rain (total 10mm), heaviest on Wed night. Warm (max 25°C on Tue afternoon, min 16°C on Tue night). Winds decreasing (fresh winds from the E on Tue morning, calm by Thu night).

Days 4-6 Weather Summary

Moderate rain (total 14mm), heaviest on Fri night. Very mild (max 19°C on Fri afternoon, min 15°C on Sun night). Winds increasing (light winds from the SE on Fri morning, strong winds from the W by Sun night).

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
AM
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
0
0
0
0
0
0
0
0
0
0
0
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)
0.7
E
4
0.5
E
3
0.2
W
10
0.3
W
9
0.3
W
8
0.3
W
8
0.3
WSW
7
0.6
WSW
3
1.1
SW
8
0.8
SW
7
1.1
WSW
4
1.7
WSW
7
2.5
WSW
8
2
WSW
8
1.5
WSW
9
1.4
WSW
9
1
WSW
8
1.4
WSW
8
1.6
WSW
8
1.5
WSW
9
1.4
WSW
10
Wave Graph
Metric surfscale
Energy kJ
12
5
8
14
12
10
11
8
176
77
42
281
711
521
352
295
134
232
318
315
351
Wind (km/h)
30
E
15
E
15
SE
20
SE
10
ESE
15
ESE
25
ESE
20
WSW
15
SSW
10
SE
20
W
30
WSW
40
WSW
30
WSW
25
WSW
30
S
40
WSW
40
WNW
35
W
35
W
25
WSW
Wind State
cross
cross
cross-on
cross-on
cross
cross
cross-on
cross-on
on
cross-on
cross
cross-on
cross-on
cross-on
cross
on
cross-on
cross-off
cross-off
cross
cross
High Tide
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
8:25AM9.34m
8:42PM9.58m
8:57AM9.36m
9:15PM9.49m
Low Tide
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
2:23PM1.21m
2:43AM1.09m
2:54PM1.23m
3:14AM1.21m
cloud
cloud
part cloud
clear
part cloud
light rain
rain showers
part cloud
clear
clear
clear
rain showers
rain showers
rain showers
rain showers
rain showers
thunderstorm
rain showers
part cloud
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:18
6:20
6:22
6:24
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:19
8:15
8:14
8:12
8:09
8:07
8:06
 mm
5
5
3
2
2
1
3
2
1
2
Temp °C
22
25
20
20
23
20
18
19
17
18
19
18
18
18
17
18
17
16
17
17
17
Feels °C
18
22
20
20
23
19
15
16
18
17
16
14
12
14
14
14
10
9
11
11
13
  • Map Icons:
  • Break
  • 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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