Caswell Bay Surf Break

Lat Long: 51.57° N 4.04° W

Caswell Bay Surf Forecast and Surf Report

Issued: 12 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Caswell Bay sea temperature is
19.8°C
3.7° 

Caswell Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Caswell Bay surf forecast from 4 Sep 2026:

  • Best quality surf: Saturday 5 Sep, 10PM (local time) - 2.5ft (0.7m), 10s period, WSW swell with glassy winds.
  • Most powerful swell: Monday 7 Sep, 1PM (local time) - 6ft (1.9m), 13s period, WSW swell with 1,156 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 10PM (local time) - 2.5ft (0.7m), 10s period with WSW swell.

Best Forecast Surf Conditions for Caswell Bay this week:

The surf forecast for Caswell Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 05) at 10PM. The primary swell is predicted to be 0.7m and 10s period with a secondary swell of 0.1m and 13s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Caswell Bay in the next 16 days are 1.9m 13s and forecast to arrive on Monday (Sep 07) at 1PM. 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 (Sat 5th Sep)2.5ft (0.7m) 10s
Best Surf10PM (Sat 5th Sep)2.5ft (0.7m) 10s
Most Powerful 1PM (Mon 7th Sep)6ft (1.9m) 13s

Table - best surf conditions forecast for Caswell Bay over the next 16 days.


The Lowdown

Alright, let’s get real about Caswell Bay. I’ve looked at the whole 16‑day window, and I’ve got to be straight with you – there’s nothing here that’s gonna get me calling in sick for work. The whole period is a bit of a write‑off for decent paddle surfing. We’ve got a massive gap of poor or marginal conditions from now all the way through. The first week is basically a no‑go, and the second week doesn’t offer much relief either.

The first record on the 3rd of September (Thursday morning) shows a weak 5‑foot swell from the WSW with a period of only 8 seconds and a cross‑onshore wind of 16 mph. The combined swell energy is a moderate 252, but the wind just ruins it – it’s choppy and messy. That’s the story for the first few days: swell hangs around 5 to 7 feet, but the wind is from the WSW, W, or WNW at 16 to 19 mph, all cross‑on or onshore. The water temperature is a notable 68°F, which is 7°F warmer than usual for this time of year – that’s very unusual, but it won’t help the surf quality.

Friday morning the 4th sees a 7‑foot swell from the WSW, but again with a poor 8‑second period and a strong 19 mph cross‑onshore wind. The combined energy jumps to 517 (moderate), but the wind state is “fresh cross‑onshore and lumpy.” Not worth paddling out.

Saturday the 5th drops right off – 3‑foot swell with a 7‑second period and a light cross‑onshore wind. The energy is only 120. By Sunday the 6th, the swell is tiny (2 feet) and the period is a weak 6 seconds. The wind turns cross‑offshore from the ESE at 16 mph, so the surface is clean, but there’s no power to push you.

The first truly interesting moment comes on Monday the 7th of September. The morning shows a 6‑foot swell from the WSW with a long period of 13 seconds – that’s a groundswell with serious energy. The combined energy rating is a massive 2033 (strong to very strong). The wind is cross‑shore from the NW at 16 mph, creating a moderate cross‑chop. The score is a 2 out of 10, called “marginal surf forecast or questionable tide conditions.” Here’s the thing: that long‑period swell (13 seconds) is going to jack up and break straight at a beach break like Caswell Bay. It’s really more suited to a point or reef. For a beginner spot, this is too big and too powerful. The afternoon stays poor with cross‑onshore wind.

After that, the rest of the week is a mess. Tuesday the 8th has 6‑foot swell but with short 7‑ to 8‑second periods and fresh cross‑onshore winds at 19‑22 mph. The energy is in the 400s, but the surf is lumpy and choppy. Wednesday the 9th drops to 4 feet, still with poor winds. Thursday the 10th is the same story. Friday the 11th and Saturday the 12th are slightly smaller but still no good wind.

The second week is even weaker. Sunday the 13th starts with a tiny 2‑foot swell, then a 5‑foot in the afternoon but with a short 6‑second period and cross‑onshore wind. Monday the 14th morning is the best of the whole run: 4‑foot swell from the WSW with a 9‑second period, and a light cross‑offshore breeze from the north at 6 mph. The water is clean, and the combined energy is 254 (moderate). The score is a 1, called “surfable waves but very ordinary conditions.” That’s the closest we get to a session, but it’s still small and ordinary.

Tuesday the 15th morning is glassy with 3‑foot swell and a 9‑second period – the wind is completely calm, 0 mph. The energy is only 129. It’s clean as a whistle, but there’s barely any wave to ride. After that, it’s all downhill: tiny swells (2 feet and below) with periods of 9‑10 seconds, and light to fresh winds, mostly cross‑onshore.

There is no standout in this 16‑day window. The only real highlight is that Monday the 7th morning swell with 2033 energy, but the wind and the break type work against it. For a beginner break like Caswell Bay, anything over 5 feet is too big, and that 6‑foot with a 13‑second period is better left to the experts – and even then, it’s not ideal here. The crowds are listed as “often” at this break, so you’d likely be dealing with company even if the conditions were good.

Honestly, if you’re a paddle surfer, leave the board at home. This setup looks more interesting for kite surfing than paddling, given the waves and wind combo. The consistency is “fairly consistent” for swell, but the quality just isn’t there. The forecasts can always change, but right now, there’s not much to get excited about.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Fri morning. Warm (max 24°C on Sun afternoon, min 14°C on Fri night). Winds decreasing (strong winds from the WSW on Thu night, calm by Sat night).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Mon night. Very mild (max 18°C on Sun night, min 13°C on Mon night). Mainly fresh winds.

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
0
0
0
0
0
0
1
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)
1.9
WSW
8
1.7
WSW
8
1.5
W
7
1
W
7
0.9
WSW
7
0.6
WSW
9
0.5
W
9
0.7
WSW
6
0.9
WSW
8
1.7
WSW
13
1.8
WSW
13
2.4
WSW
7
2.1
W
8
2.3
WSW
8
1.8
W
8
1.4
W
7
1.1
W
6
1.8
WSW
6
1.8
WSW
8
1.6
WSW
8
1.3
WSW
9
Wave Graph
Metric surfscale
Energy kJ
497
373
231
94
77
68
40
41
93
1058
993
563
603
592
387
192
104
257
408
354
249
Wind (km/h)
30
W
30
W
25
WNW
10
WNW
15
WSW
10
SE
25
SE
15
SSE
20
SW
25
WNW
25
WSW
35
W
30
W
30
W
25
WNW
25
W
25
WSW
40
SW
20
WNW
25
WSW
30
WNW
Wind State
cross-on
cross-on
cross
cross-on
on
cross
cross-off
cross
on
cross
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
on
cross-on
cross-on
cross
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
5:02AM2.45m
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
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
clear
clear
clear
part cloud
cloud
heavy rain
rain showers
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
3
2
11
1
Temp °C
17
17
16
16
16
15
21
24
18
17
17
16
16
16
15
16
16
16
18
18
17
Feels °C
12
11
11
14
14
15
17
22
16
12
13
10
9
10
10
10
11
12
16
15
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 Caswell Bay Surf forecast

The above surf forecast table for Caswell Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Caswell Bay can be found by selecting the local surf guide option on the grey menu. Our Caswell Bay 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 (Caswell Bay) 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 Caswell Bay 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.

Caswell Bay 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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