Crab Island Surf Break

Lat Long: 51.56° N 4.00° W

Crab Island Surf Forecast and Surf Report

Issued: 6 am 12 Aug 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
20.4° C
4.1° 

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 12 Aug 2026:

  • Best quality surf: Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with offshore winds.
  • Most powerful swell: Thursday 13 Aug, 10AM (local time) - 3ft (0.9m), 10s period, WSW swell with 149 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. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Crab Island in the next 16 days are 0.9m 10s and forecast to arrive on Thursday (Aug 13) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 15) at 7PM.

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 Powerful10AM (Thu 13th Aug)3ft (0.9m) 10s

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


The Lowdown

G’day, Rusty here. Look, I’m gonna level with ya – it’s a tough stretch ahead for Crab Island. This is a south-west facing reef break, and the next sixteen days are looking pretty grim for a proper surf. We’ve got a long, quiet spell right off the bat, so don’t bother paddling out for a while.

The water is sitting at 69°, which is much warmer than usual for this time of year – that’s a hell of a anomaly. But warm water doesn’t make up for the lack of waves.

For the first few days, it’s all small and messy. Wednesday the 12th has 2 ft swell from the WSW at 10 seconds, but with a cross-on ESE breeze at 12 mph, it’s choppy and poor. The combined energy is only 60 – that’s weak. Thursday the 13th is not much better: 3 ft swell but still cross-shore winds and a combined energy of 149, which is still not enough to overcome the crummy conditions. Friday the 14th drops off to 2 ft and less energy (84). The pattern continues through the weekend with tiny surf, and by Monday the 17th it’s barely a ripple at 0.7 ft.

We hit a bit of a spike on Tuesday the 18th. The swell jumps to 5 ft from the WSW, but the period is only 6 seconds – that’s short-period slop. The winds are a fresh cross-onshore at 22 mph, making it lumpy and ugly. Combined energy hits 156 (moderate), but with that wind and short period, it’s not worth your time for a surf. Honestly, that setup looks more interesting for kite surfing than paddle surfing.

Wednesday the 19th gives us the best of a bad bunch. Morning sees a 3 ft swell from the west with a 7-second period, but the wind swings offshore from the NNW at 12 mph. It’s the first time the forecast calls for “surfable waves but very ordinary conditions” with a score of 1 out of 10, so that’s the standout, if you can even call it that. The wind will keep it clean, but the energy is only 81, so don’t expect much push. It’s a brief window before it goes flat again.

After that, the rest of the month is a washout. There’s a little bump of 4 ft on Thursday the 27th from the west at 6 seconds, but the cross-on wind and combined energy of 115 still isn’t enough to save it. Conditions stay poor.

So, if you’re desperate, the only window worth even a look is the morning of Wednesday the 19th of August – it’s not good, but it’s the cleanest of a bad lot. For the rest, you’re better off keeping the board in the shed. Forecasts can change, but right now, Crab Island is a no-go.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 32°C on Wed afternoon, min 15°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Mon night. Warm (max 20°C on Sun afternoon, min 13°C on Sat night). Winds increasing (calm on Sun night, fresh winds from the WSW by Mon night).

Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
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
1
0
0
1
0
0
1
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)
0.5
WSW
10
0.6
WSW
10
0.8
WSW
9
0.9
WSW
10
0.8
WSW
10
0.7
WSW
10
0.7
WSW
9
0.5
WSW
9
0.5
W
8
0.4
WSW
8
0.6
W
8
0.4
WSW
8
0.3
WSW
7
0.3
WSW
7
0.2
WSW
7
0.2
W
7
0.2
W
7
0.2
W
8
1.5
WSW
6
1.2
W
7
1
W
7
Wave Graph
Metric surfscale
Energy kJ
58
74
94
149
133
98
84
45
33
22
41
19
11
10
5
4
4
7
141
134
89
Wind (km/h)
20
ESE
20
SE
5
WNW
5
W
25
W
10
WNW
15
W
25
W
15
NNW
25
NNW
25
NNW
15
N
20
N
25
NW
15
NNE
5
SSE
15
W
25
SW
35
WSW
30
WNW
15
NW
Wind State
cross-on
cross-on
cross-off
cross
cross
cross-off
cross
cross-off
off
off
cross-off
off
off
cross-off
off
on
cross
cross-on
cross-on
cross-off
cross-off
High Tide
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
10:10AM9.04m
10:23PM9.02m
10:41AM8.59m
10:55PM8.48m
Low Tide
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
4:04PM1.48m
4:25AM1.75m
4:35PM1.94m
clear
clear
clear
part cloud
clear
part cloud
clear
cloud
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
cloud
light rain
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:56
5:58
6:00
6:01
6:03
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:45
8:43
8:40
8:38
8:37
8:35
8:32
 mm
4
Temp °C
27
32
26
25
26
20
20
21
17
18
18
15
19
20
16
16
17
18
18
19
19
Feels °C
23
28
26
22
23
20
18
19
14
13
12
10
15
14
12
15
14
15
14
16
18
  • 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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