The Boiler Surf Break

Lat Long: 51.56° N 4.02° W

The Boiler Surf Forecast and Surf Report

Issued: 6 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's The Boiler sea temperature is
19.7°C
3.6° 

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 4 Sep 2026:

  • Best quality surf: Saturday 5 Sep, 7AM (local time) - 3.5ft (1.1m), 7s period, W swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 4PM (local time) - 6ft (1.8m), 13s period, WSW swell with 993 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 7AM (local time) - 3.5ft (1.1m), 7s 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 7AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.4m and 9s. 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 1.8m 13s and forecast to arrive on Monday (Sep 07) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Friday (Sep 11) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Sat 5th Sep)3.5ft (1.1m) 7s
Best Surf 7AM (Sat 5th Sep)3.5ft (1.1m) 7s
Most Powerful 4PM (Mon 7th Sep)6ft (1.8m) 13s

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


The Lowdown

Right then, let’s have a look at what’s on offer. I’m not gonna lie to you, this stretch of the forecast is a bit of a soul-sapper for The Boiler. We’ve got a full 16-day window to look at, but it’s a tale of very few highlights and a whole lot of waiting.

The first real surfable moment doesn’t arrive until September 7th. Before that, it’s a mess. Friday the 4th and Saturday the 5th are a write-off – cross-shore winds and lumpy, poor conditions. Sunday the 6th is even worse, with tiny waves and bad wind. So, you’re looking at a three-day gap of nothing worth paddling out for.

Alright, Monday morning the 7th. Now we’re talking. The Boiler sees a 5ft swell from the W, with a long period of 11 seconds. That’s proper groundswell energy, and the combined energy is a solid 732 (moderate wave energy). The wind is cross-off from the WNW, which will keep it clean. This is the standout of the whole period. The swell direction is WSW, and the spot is exposed to the SW, so it’s a good match. The water is 68°, which is a whopping 7° warmer than normal for this time of year – that’s very unusual, you’ll be in for a warm one. The Boiler is a reef break and it’s inconsistent, so don’t expect a wave every minute, but when they come, they’ll have some punch. Paddling out will be easier with those longer gaps between sets. The crowd is listed as “sometimes,” so you might have a few others out, but with the inconsistent nature, it shouldn’t be a zoo.

The afternoon of the 7th gets messy though. The wind swings cross-on and the swell jumps to 6ft with a 13-second period, but the energy is high at 993. The onshore wind will chop it up, so it’s a morning-only session.

The next few days are a frustrating mix. Tuesday the 8th has a 7ft swell from the WSW with clean cross-off winds in the morning, but the period is short at 8 seconds, and it’s still a cross-off. The energy is 588. It’s surfable, but not spectacular. The wind is a fresh breeze, so it’s clean but bumpy. The rest of that week through to the 11th is a constant battle with cross-shore and cross-on winds, keeping the quality poor. The swell sticks around 5ft to 7ft, but the wind just ruins it.

The 12th and 13th of September see a drop in swell, with tiny 1ft to 2ft waves. The wind goes offshore for a stretch, which is nice and clean, but there’s simply no energy to ride. The combined energy sinks to 33 (weak). You’d be scratching for anything.

We get a bit of a pulse on the 14th and 15th, with 5ft and then 8ft swell from the WSW. The 15th morning has a 8ft swell with a combined energy of 657, but it’s cross-shore and lumpy. That’s big for The Boiler – over 8ft, so it’s expert territory only. The afternoon of the 15th cleans up a bit with a cross-off wind, but it’s still a big, powerful 7ft wave. The period is short at 8 seconds, so it’ll be a bit sectiony.

After that, the 16th through the 19th sees the swell fizzle out completely. The wind turns cross-off and clean, but wave heights are below 3ft, and the energy is weak. The 18th morning has a tiny 0.7ft wave with a 10-second period, but there’s nothing to ride. The 18th afternoon picks up a weird 4ft pulse from the W with a 6-second period and a cross-shore wind, but it’s a ghost energy reading of 143 – it’s not going to be good.

So, what’s the verdict? The only real window is Monday morning, September 7th. That’s your standout. Get there early for the clean cross-off and the long-period groundswell. Everything else is either too windy, too small, or too messy. The long-range stuff around the 15th is promising for size, but the wind is a gamble. This is a tough run for The Boiler. It’s inconsistent at the best of times, and this forecast is a classic example of the waiting game.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Fri morning. Warm (max 23°C on Sun afternoon, min 14°C on Fri night). Winds decreasing (fresh winds from the W on Fri morning, calm by Sat night).

Days 4-6 Weather Summary

Moderate rain (total 10mm), heaviest on Wed night. Very mild (max 18°C on Wed night, min 14°C on Tue night). Winds increasing (light winds from the WNW on Mon morning, strong winds from the SW by Wed night).

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
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
1
0
0
0
0
0
2
0
0
0
0
1
0
0
0
0
0
1
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
8
1.7
WSW
8
1.4
WSW
7
0.9
WSW
7
0.8
WSW
7
0.6
WSW
9
0.6
W
6
0.7
WSW
6
1
WSW
8
1.5
W
11
1.8
WSW
13
2.4
WSW
8
2.1
WSW
8
2.2
W
7
1.9
W
8
1.5
W
7
1.3
WSW
7
1.6
WSW
6
2
WSW
8
1.9
WSW
8
1.7
WSW
8
Wave Graph
Metric surfscale
Energy kJ
497
373
203
73
69
68
28
43
116
525
993
661
588
522
424
239
161
184
523
460
432
Wind (km/h)
35
W
30
W
20
WNW
10
WNW
15
WSW
10
SE
20
SE
10
S
20
SW
20
WNW
25
WSW
35
W
30
WNW
30
W
25
WNW
25
W
35
SW
45
SW
25
W
30
W
20
WNW
Wind State
cross
cross
cross-off
cross-off
cross-on
cross-on
cross-on
on
cross-on
cross-off
cross-on
cross
cross-off
cross
cross-off
cross
cross-on
cross-on
cross
cross
cross-off
High Tide
11:24AM7.96m
00:02AM7.65m
12:36PM7.40m
1:34AM7.19m
2:22PM7.24m
3:19AM7.32m
3:58PM7.71m
4:43AM7.95m
5:11PM8.48m
5:45AM8.68m
6:07PM9.17m
6:36AM9.24m
6:54PM9.63m
Low Tide
5:26PM2.76m
6:02AM3.09m
6:51PM3.32m
7:47AM3.49m
8:54PM3.32m
9:37AM3.19m
10:26PM2.71m
10:56AM2.48m
11:34PM1.96m
11:54AM1.77m
00:27AM1.35m
12:42PM1.26m
1:11AM0.99m
light rain
part cloud
clear
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
cloud
cloud
rain showers
clear
clear
clear
cloud
light rain
rain showers
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:31
6:33
6:35
6:37
6:37
6:39
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:57
7:53
7:52
7:50
7:47
7:45
7:43
 mm
1
2
1
7
Temp °C
17
17
16
15
16
15
20
23
18
17
17
16
15
16
15
16
17
18
19
18
17
Feels °C
12
11
11
14
13
14
17
22
16
12
12
9
9
10
10
10
11
15
16
14
14
  • 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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