The Boiler Surf Break

Lat Long: 51.56° N 4.02° W

The Boiler Surf Forecast and Surf Report

Issued: 12 pm 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's The Boiler sea temperature is
21.3° C
5.0° 

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 19 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 7AM (local time) - 5ft (1.5m), 7s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Thursday 20 Aug, 1AM (local time) - 5ft (1.5m), 7s period, W swell with 231 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 7AM (local time) - 5ft (1.5m), 7s 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 20) at 7AM. The primary swell is predicted to be 1.5m and 7s period with a secondary swell of 0.1m and 15s. 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 1.5m 7s and forecast to arrive on Thursday (Aug 20) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Aug 20) at 7PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Thu 20th Aug)5ft (1.5m) 7s
Best Surf 7AM (Thu 20th Aug)5ft (1.5m) 7s
Most Powerful 1AM (Thu 20th Aug)5ft (1.5m) 7s

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


The Lowdown

Alright, let’s get real here. I’ve looked at the charts for the next couple of weeks, and honestly, it’s a pretty bleak stretch for The Boiler. This is a reef break that’s inconsistent at the best of times, and we’re going through a proper flat spell for most of the period.

The water is sitting at 70°F – that’s a massive 9°F warmer than usual for this time of year, which is really unusual. You’ll be surfing in what feels like bathwater, but don’t get too excited because there’s hardly any swell to go with it.

We kick off on Wednesday the 19th of August with a tiny 3ft WSW swell, but the wind is messy and the wave energy is weak (62). It’s basically a write-off. Thursday the 20th sees a bit more push with a 5ft WSW swell and a clean cross-off wind, but the energy is still only moderate (246) and the surf is being described as poor. It’s not worth paddling out.

Friday the 21st of August morning is the only glimmer in the first week. We’ve got a clean offshore wind from the north and a small 2ft west swell with a period of 8 seconds. The energy is low (68), but the conditions are the most surfable we’ll see. Even then, it’s barely a 1 out of 10 – very ordinary, but it’s the best of a bad bunch.

After that, from Saturday the 22nd through to Tuesday the 25th of August, it’s almost completely flat. Swell heights drop to 0.3ft to 1.0ft, and the energy is in the teens. It’s glassy and clean on some mornings, but there’s simply no wave to ride.

We get a little pulse on Wednesday the 26th of August with a 3ft WSW swell, then it builds to 5ft by the afternoon, but the wind swings onshore and the energy jumps to 340. It’s choppy and poor. The 31st of August brings a similar story – a 6ft W swell with a 10-second period and strong energy (627), but the wind is fresh cross-shore, making it lumpy and messy. This is expert-only territory, and even then the quality is poor.

The very end of the forecast, on the 2nd of September, shows a 5ft W swell with glassy conditions in the morning. It’s surfable but only just. The rest of the run is more of the same – small, windy, or both.

So, to be straight with you: there’s really no standout session here. The best you’ll get is a very average, small wave on Friday the 21st of August morning. After that, we’ve got a long gap of near-flat conditions until the 26th, and then a messy, bigger swell that’s blown out. If you’re desperate, the 21st is your only window. Otherwise, you might be better off looking at a different spot or taking a break.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Wed night. Very mild (max 18°C on Wed morning, min 12°C on Thu night). Winds decreasing (fresh winds from the W on Wed afternoon, light winds from the N by Fri morning).

Days 4-6 Weather Summary

Mostly dry. Warm (max 23°C on Mon afternoon, min 13°C on Sat night). Wind will be generally light.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
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
1
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)
0.8
WSW
6
1.1
WSW
5
1.5
W
7
1.4
WSW
7
1.5
W
7
0.9
WSW
9
0.6
WSW
8
0.3
WSW
8
0.3
WSW
8
0.3
WSW
10
0.3
WSW
10
0.3
WSW
9
0.2
WSW
9
0.2
WSW
9
0.2
W
8
0.2
WSW
9
0.2
WSW
9
0.2
WSW
9
0.2
WSW
8
0.2
WSW
8
0.5
W
9
Wave Graph
Metric surfscale
Energy kJ
46
59
231
214
222
132
53
13
14
18
18
16
8
8
8
8
8
7
7
7
45
Wind (km/h)
10
W
30
W
20
W
25
WNW
25
WNW
15
N
10
N
15
W
15
NNE
5
ENE
10
NW
15
NNE
5
ENE
10
WSW
15
NE
25
ESE
10
ESE
20
ENE
5
E
15
WSW
5
W
Wind State
cross
cross
cross
cross-off
cross-off
off
off
cross
off
glassy
cross-off
cross-off
cross-off
cross
cross-off
cross
cross
cross-off
glassy
cross-on
cross
High Tide
11:12AM8.06m
11:28PM7.89m
11:51AM7.51m
00:13AM7.29m
12:49PM7.00m
1:23AM6.79m
2:19PM6.75m
2:58AM6.69m
3:48PM7.01m
4:21AM7.06m
4:55PM7.57m
5:22AM7.63m
5:45PM8.16m
Low Tide
5:08PM2.48m
5:28AM2.83m
5:52PM3.08m
6:17AM3.42m
7:01PM3.61m
7:43AM3.84m
8:36PM3.79m
9:21AM3.79m
10:00PM3.49m
10:37AM3.32m
11:04PM2.94m
11:31AM2.75m
11:52PM2.38m
clear
clear
rain showers
rain showers
rain showers
rain showers
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:07
6:09
6:11
6:13
6:13
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:30
8:29
8:27
8:24
8:22
8:21
8:19
 mm
2
2
2
2
1
9
Temp °C
18
18
16
17
18
14
16
17
14
17
18
15
17
20
19
21
23
20
18
20
18
Feels °C
13
13
12
13
14
10
14
14
10
15
15
11
15
17
15
17
20
16
16
19
18
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for The Boiler:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our The Boiler surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest