Crab Island Surf Break

Lat Long: 51.56° N 4.00° W

Crab Island Surf Forecast and Surf Report

Issued: 6 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
20.3° C
4.0° 

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


Crab Island surf forecast from 10 Aug 2026:

  • Best quality surf: Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with glassy winds.
  • Most powerful swell: Thursday 13 Aug, 7PM (local time) - 3.5ft (1.0m), 10s period, WSW swell with 209 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period with WSW swell.

Best Forecast Surf Conditions for Crab Island this week:

The surf forecast for Crab Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 10PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.2m and 3s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Crab Island in the next 16 days are 1.0m 10s and forecast to arrive on Thursday (Aug 13) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Aug 14) at 10PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Wed 12th Aug)2.5ft (0.7m) 9s
Best Surf10PM (Wed 12th Aug)2.5ft (0.7m) 9s
Most Powerful 7PM (Thu 13th Aug)3.5ft (1.0m) 10s

Table - best surf conditions forecast for Crab Island over the next 16 days.


The Lowdown

G’day, it’s Rusty here. Let’s be straight with you: the next couple of weeks are looking pretty grim for a paddle. We’ve got a long stretch of tiny, weak surf and a lot of choppy, cross-shore wind that’s going to have you pulling the plug on the session before you even get your wetsuit on. I’m talking about Crab Island, a reef setup that stays pretty consistent, but it’s not going to do you any favors with what’s coming through.

The water is sitting at 69° right now, which is a solid 7° warmer than normal for this time of year. That’s a big deal – we’re talking about a seriously warm ocean, so you can ditch the thick rubber and enjoy the feeling of being in a bath.

Looking at the pattern, the first real chance of anything worthwhile is a long way off. From now until the 22nd, it’s basically a write-off. The swell is tiny, mostly under 2ft, and the energy is weak – we're talking combined energy values in the single digits to the 70s, which is just nothing. The wind is mostly onshore or cross-shore, making things messy. There are a couple of clean moments, like the glassy spells on the morning of the 16th and the 21st, but with no swell behind them, it’s just a flat, pretty ocean.

Now, keep your eyes on Sunday the 23rd. That’s the one that’s got my attention. The morning shows a jump to 7ft of swell from the W, with a period of 9 seconds. The combined energy leaps to 621, which is strong. The wind is light and offshore from the NW, making it clean. This is the standout of the whole window. It’s a groundswell, but at 9 seconds it’s not super long, so it should hold some shape. This is going to be big – over 5ft, so it’s not for the beginners. It's a proper wave for the crew who know what they’re doing. The afternoon sees it drop a bit to 5ft and the wind swings cross-shore, so the morning is definitely the call. This is more than a week out, so treat it as a promising lead, not a guarantee, but it’s the only real highlight on the board.

After that, it fades out again quickly, with the rest of the window looking pretty average. The swell drops back to under 3ft, and we’re back to ordinary conditions. There’s a weak, very long-period swell on the 25th, but it’s tiny and blown out, so it’s not worth the effort. Honestly, if you’ve got a window, you’re waiting for the 23rd. Everything else is a skunk.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Thu morning, min 14°C on Sat night). Wind will be generally light.

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
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
1
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)
0.7
WSW
6
0.4
WSW
5
0.3
SW
7
0.2
W
8
0.2
W
10
0.3
WSW
11
0.5
WSW
10
0.6
WSW
10
0.8
WSW
9
0.9
WSW
10
0.9
WSW
10
0.8
WSW
10
0.5
W
9
0.8
W
6
0.7
W
8
0.7
W
8
0.5
WSW
7
0.5
W
8
0.4
WSW
7
0.3
WSW
7
0.2
WSW
7
Wave Graph
Metric surfscale
Energy kJ
33
9
7
5
7
25
58
74
94
158
173
123
40
44
64
57
30
29
18
10
5
Wind (km/h)
15
NNW
10
SW
10
ENE
25
ESE
10
SE
10
E
15
ESE
15
SE
5
E
10
SW
25
W
10
W
15
NW
25
NW
15
N
20
N
25
NW
15
N
0
W
20
W
15
NNW
Wind State
off
cross-on
cross-off
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross-off
cross-off
off
off
cross-off
off
glassy
cross
cross-off
High Tide
5:13PM8.36m
5:50AM8.55m
6:15PM9.02m
6:47AM9.10m
7:08PM9.53m
7:37AM9.48m
7:55PM9.82m
8:21AM9.64m
8:38PM9.89m
9:01AM9.60m
9:16PM9.76m
9:37AM9.39m
9:51PM9.46m
Low Tide
10:52AM2.46m
11:32PM2.07m
11:58AM1.85m
00:33AM1.47m
12:53PM1.33m
1:26AM1.04m
1:41PM1.00m
2:12AM0.82m
2:23PM0.87m
2:52AM0.81m
3:01PM0.92m
3:27AM0.99m
3:34PM1.13m
3:57AM1.32m
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:54
5:54
5:56
5:58
6:00
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:49
8:46
8:45
8:43
8:40
8:38
8:37
 mm
Temp °C
19
21
19
23
26
23
27
31
27
26
26
19
20
22
16
20
21
15
18
20
18
Feels °C
18
18
17
21
23
21
23
28
26
22
23
19
17
18
12
17
16
11
16
16
15
  • 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 Crab Island Surf forecast

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

Crab Island is 8 km (5 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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