The Boiler Surf Break

Lat Long: 51.56° N 4.02° W

The Boiler Surf Forecast and Surf Report

Issued: 12 am 09 Jul 2026 (local time)

Forecast update in  hr  min

Today's The Boiler sea temperature is
20.1° C
5.2° 

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 9 Jul 2026:

  • Most powerful swell: Friday 10 Jul, 10AM (local time) - 1.5ft (0.5m), 9s period, W swell with 42 kJ wave energy.

Best Forecast Surf Conditions for The Boiler this week:

The most powerful waves expected at The Boiler in the next 16 days are 0.5m 9s and forecast to arrive on Friday (Jul 10) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Jul 14) at 1AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful10AM (Fri 10th Jul)1.5ft (0.5m) 9s

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


Alright, let’s get into it. To be straight with you – this is a pretty quiet stretch for The Boiler. The whole 16-day window is a write-off in terms of any kind of quality surf. There’s no standout, no pulse, nothing to get excited about. We’re looking at a long blank run, which isn’t unusual for this spot during this time of year, but it still stings.

The first record starts on Thursday 9th July, and it’s already a dud. Tiny 1ft swell from the W with a period of 10 seconds, and the combined energy is a weak 20. Morning glass, but the wave comment says “poor surf conditions” – that’s about right. Afternoon picks up a cross-shore breeze and it’s just as flat. That sets the tone.

Friday 10th July keeps the same tiny 2ft to 2ft W swell, period dropping to 9 seconds, energy still low (43). The morning is a cross-on, not great. The afternoon turns offshore from the NNW, so it’s clean, but you’re still looking at barely rideable waves. Not worth the paddle.

Saturday 11th July is a step back – 1ft, WSW, period 7 seconds, energy 16. Morning is choppy, afternoon cleans up with a cross-off breeze, but it’s barely moving. Sunday 12th July is weird: 2ft swell from the E with a period of only 3 seconds – that’s windswell, lumpy, and the energy is 18. The wind is fresh, but it’s clean. Still, not surf.

Monday 13th July through to Wednesday 15th July is more of the same – 2ft to 3ft E swell, period 4 seconds, energy in the 20s and 40s. The wind is cross or cross-on, so it’s bumpy and weak. The water temp is about average for the time of year, nothing unusual.

Thursday 16th July sees a tiny 0.3ft SW swell with a 14-second period, energy 15. Morning glass, but it’s so small it’s barely a ripple. Afternoon gets a cross-shore breeze. Not happening.

The rest of the run – from Friday 17th July right through to Friday 24th July – is just flat. The swell height stays between 0.3ft and 1ft, period bounces around, but the combined energy never gets above 28, and most days it’s in single digits. The wind is often clean or offshore, but with no swell, it’s just a lake. The last day, Friday 24th July, shows a 4ft W swell with a 6-second period and energy of 95 – that’s the biggest of the lot, but it’s short period, cross-shore wind, and still rated “poor surf conditions.” Too weak and messy to bother.

Bottom line: this is a hopeless run for surfing. The Boiler is inconsistent at the best of times, and this 16-day stretch is a total flat spell. If you’re kiting, the bigger days with clean cross-off winds might be worth a look, but for paddling, leave the board at home.

Rusty

Short Range Forecast

Mostly dry. Warm (max 31°C on Fri afternoon, min 15°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 31°C on Tue afternoon, min 14°C on Sun night). Mainly fresh winds.

Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
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)
0.3
W
10
0.3
W
10
0.3
W
9
0.5
W
9
0.5
W
9
0.5
W
8
0.3
WSW
7
0.3
WSW
8
0.6
E
3
0.6
E
3
0.6
E
4
0.1
W
8
0.7
E
4
0.7
E
4
0.1
W
15
0.9
E
4
0.7
E
4
0.8
ESE
4
0.9
E
4
0.7
E
4
0.2
WSW
9
Wave Graph
Metric surfscale
Energy kJ
17
16
16
42
40
37
9
13
7
8
9
1
13
15
4
27
14
22
27
14
10
Wind (km/h)
5
WSW
15
WSW
10
NNE
10
ESE
10
NNW
10
ENE
15
ESE
5
WNW
25
E
35
E
20
ENE
35
ENE
25
ENE
25
E
30
ENE
30
E
25
E
20
E
15
ESE
10
W
5
NW
Wind State
glassy
cross
cross-off
cross-on
off
cross-off
cross-on
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross
cross
cross
cross-on
cross
glassy
High Tide
1:35PM7.64m
2:14AM7.80m
2:51PM7.69m
3:31AM7.90m
4:08PM8.00m
4:45AM8.22m
5:17PM8.49m
5:52AM8.65m
6:19PM8.99m
6:52AM9.05m
7:15PM9.41m
7:47AM9.35m
8:07PM9.66m
Low Tide
7:14AM2.62m
7:46PM2.80m
8:27AM2.68m
9:05PM2.71m
9:43AM2.51m
10:21PM2.39m
10:54AM2.17m
11:29PM1.95m
11:58AM1.75m
00:32AM1.52m
12:56PM1.39m
1:30AM1.17m
1:50PM1.13m
2:24AM0.97m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
clear
part cloud
rain showers
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:09
5:09
5:11
5:11
5:13
5:13
5:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:31
9:31
9:30
9:30
9:29
9:28
9:27
 mm
2
4
4
6
Temp °C
21
25
23
26
31
28
28
30
27
25
29
22
24
29
23
26
31
24
22
24
19
Feels °C
20
24
21
26
30
27
27
29
24
21
25
14
18
24
16
21
26
18
22
24
19
  • 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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