The Boiler Surf Break

Lat Long: 51.56° N 4.02° W

The Boiler Surf Forecast and Surf Report

Issued: 12 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's The Boiler sea temperature is
20.6°C
4.4° 

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 31 Aug 2026:

  • Best quality surf: Saturday 5 Sep, 1AM (local time) - 3.5ft (1.1m), 6s period, W swell with cross-offshore winds.
  • Most powerful swell: Monday 31 Aug, 7PM (local time) - 5ft (1.6m), 10s period, WSW swell with 492 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 1AM (local time) - 3.5ft (1.1m), 6s 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 Saturday (Sep 05) at 1AM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.1m and 14s 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 1.6m 10s and forecast to arrive on Monday (Aug 31) at 7PM. 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+) 1AM (Sat 5th Sep)3.5ft (1.1m) 6s
Best Surf 1AM (Sat 5th Sep)3.5ft (1.1m) 6s
Most Powerful 7PM (Mon 31st Aug)5ft (1.6m) 10s

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


The Lowdown

G’day, Rusty here. Let’s be straight with you – the outlook for The Boiler over the next sixteen days is a tough one. We’ve got a lot of swell rolling through, but the wind just won’t play ball for clean, surfable waves. It’s a real shame, because the energy is there, but the conditions are making it a write-off for paddle surfing for most of the period.

Right from the start, Monday August 31st, we see a decent amount of swell coming in. The morning has waves around 6 ft from the WSW with a period of 9 seconds. The combined energy is moderate at 653. But the wind is a cross-off from the WNW at 19 mph, which is keeping things clean, but the overall surf conditions are rated as poor. The water temperature is a very unusual 69°, which is much warmer than normal for this time of year by over 4°.

That theme continues for the first week. Tuesday and Wednesday see the swell drop to around 3 ft, but the wind swings cross-on and it gets choppy. There’s a brief pulse of energy on Wednesday afternoon with 6 ft swell (combined energy 228), but with a 22 mph cross-on wind and rain, it’s just messy. Thursday and Friday are more of the same – lumpy and cross-onshore, with fresh winds. The best the first week offers is Saturday September 5th morning: a small 3 ft cross-off swell from the WSW with clean conditions and light winds. The combined energy is weak at 89, so it’s surfable but very ordinary.

Things fall away into the middle of the week. Sunday and Monday are tiny, with the 6th providing a glassy moment in the afternoon but only 1 ft of swell. There’s a spike of energy on Tuesday September 8th, with 5-6 ft swell (combined energy hitting 711 in the afternoon), but the wind is straight cross-on and choppy again. Poor conditions.

The second week doesn’t offer any reprieve. Wednesday September 9th has a fresh cross-on blowing at 22 mph with 3 ft swell. Thursday and Friday see cleaner cross-off winds on smaller, weak swell. The biggest push of the entire forecast comes on Monday September 14th, with 8 ft WSW swell and a combined energy of 1024 – that’s strong wave energy. But it’s under a cross-on wind at 16 mph, making it choppy and poor quality. At that size, it’s only for experts, and the wind ruins it anyway. Tuesday the 15th is similar with 6 ft swell but onshore wind.

Honestly, there’s no standout here. The best call for a surf would be Saturday September 5th morning for a slim chance at a knee-to-waist high clean wave, or maybe Friday September 11th morning which offers clean cross-off winds on a 3 ft, 9-second swell, but the energy is weak (106). For the rest of it, if you’ve got a kite, the consistent cross-onshore winds and decent swell on the bigger days (like September 14th) will look far more interesting than trying to paddle out.

Any real hope is a long way off and uncertain. Hang in there, it tends not to stay this poor forever, and forecasts can always flip.

– Rusty

Short Range Forecast

Light rain (total 2mm), mostly falling on Tue night. Very mild (max 18°C on Wed afternoon, min 15°C on Mon morning). Winds increasing (light winds from the WSW on Tue night, fresh winds from the SW by Wed afternoon).

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Thu night. Very mild (max 18°C on Thu morning, min 13°C on Fri night). Winds decreasing (fresh winds from the SW on Thu night, calm by Sat night).

Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
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
1
1
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)
1.9
WSW
9
1.7
WSW
10
1.2
WSW
10
0.9
W
9
0.9
WSW
8
0.7
WSW
5
0.9
WSW
5
1.7
WSW
6
1.5
WSW
7
1.5
WSW
7
1.6
WSW
7
1.4
WSW
7
1
WSW
8
1.2
WSW
8
1.1
W
6
0.8
WSW
6
0.5
W
10
0.6
WSW
10
0.4
WSW
9
0.4
WSW
9
0.3
WSW
8
Wave Graph
Metric surfscale
Energy kJ
653
551
276
127
103
22
42
218
229
225
237
188
140
192
91
51
49
74
27
26
13
Wind (km/h)
30
WNW
25
WNW
15
W
20
WSW
25
WSW
15
WSW
25
SSW
35
SW
30
SW
25
SW
25
WSW
25
W
30
W
30
W
15
NW
5
WNW
10
WSW
5
SSE
15
ESE
5
S
15
WSW
Wind State
cross-off
cross-off
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross-off
cross-off
cross
cross-on
cross-on
glassy
cross-on
High Tide
9:15PM9.49m
9:28AM9.22m
9:48PM9.24m
10:01AM8.93m
10:23PM8.83m
10:38AM8.51m
11:04PM8.29m
11:24AM7.96m
00:02AM7.65m
12:36PM7.40m
1:34AM7.19m
2:22PM7.24m
3:19AM7.32m
Low Tide
2:54PM1.23m
3:14AM1.21m
3:24PM1.39m
3:45AM1.48m
3:57PM1.70m
4:20AM1.90m
4:35PM2.16m
5:02AM2.45m
5:26PM2.76m
6:02AM3.09m
6:51PM3.32m
7:47AM3.49m
8:54PM3.32m
cloud
cloud
part cloud
part cloud
cloud
light rain
part cloud
rain showers
part cloud
light rain
light rain
light rain
light rain
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:26
6:28
6:30
6:31
6:33
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:06
8:02
8:00
7:59
7:57
7:53
7:52
 mm
1
1
2
1
4
2
Temp °C
16
17
16
17
17
17
17
18
18
18
18
18
17
16
16
15
16
15
20
22
20
Feels °C
11
12
12
14
13
16
14
14
16
16
15
14
12
11
12
13
14
15
18
21
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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