Crab Island Surf Break

Crab Island Surf Forecast and Surf Report

Lat Long: 51.56° N 4.00° W

Issued: 6 pm 04 Jul 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
19.3° C

4.6°C warmer than normal for this time of year

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 5 Jul 2026:

  • Best quality surf: Sunday 5 Jul, 4AM (local time) - 3ft (0.9m), 6s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Sunday 5 Jul, 4AM (local time) - 3ft (0.9m), 6s period, WSW swell with 66 kJ wave energy.
  • Next surfable swell (1★+): Sunday 5 Jul, 4AM (local time) - 3ft (0.9m), 6s 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 Sunday (Jul 05) at 4AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Crab Island in the next 16 days are 0.9m 6s and forecast to arrive on Sunday (Jul 05) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Jul 11) at 7PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Sun 5th Jul)3ft (0.9m) 6s
Best Surf 4AM (Sun 5th Jul)3ft (0.9m) 6s
Most Powerful 4AM (Sun 5th Jul)3ft (0.9m) 6s

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


Updates in  hr  min  s Forecast update imminent

Alright, this is Rusty here, and I've gotta be straight with you – it's gonna be a real quiet stretch for Crab Island. There's just no surf worth paddling out for in this whole 16-day window. That first record kicks off on Saturday the 4th of July, but it's all poor conditions from there, right through to the end.

Let's start with the bigger picture. Through the first week, the swell is tiny – we're looking at maybe 1 ft to 4 ft from the WSW and W, but the wind is mostly cross or cross-onshore, and the wave energy is just gutless, with readings like 154 (weak) and then dropping to double digits. The combo of small waves and rubbish wind means the surf is flat, messy, and not worth a second look.

Saturday the 4th sees a faint pulse of 4 ft swell from the WSW, but it's a short 6-second period and cross-shore wind at 16 mph, so forget it. Sunday the 5th drops to 2 ft, and the theme continues. Even when we get a glassy moment on Saturday the 11th, the swell is only 1 ft and the energy is 23 – just a flat, oily lake. The odd clean window pops up, like Thursday afternoon the 9th with light cross-offshore wind, but again, 1 ft at best.

Into the second week, it gets even smaller. From the 13th of July onward, we're down to 0.3 ft–0.7 ft with long-period groundswell from the SW and W (19 seconds on the 13th), but that's just noise in the water, not surfable waves. Winds pick up too – a strong breeze from the E on the 14th at 25 mph, which is just ugly.

There's a slight uptick on the 19th of July with 4 ft from the ESE, but the period is only 5 seconds and the wind is cross-shore again. The energy is 56 – still weak. That's a week and a half away, and with no consistency and poor quality, I wouldn't hold my breath.

No standouts here, folks. This is one of those blank runs where Mother Nature just isn't cooperating. It tends not to stay this flat forever, but for now, the board stays in the van. Keep an eye on the forecast, because things can flip.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Sun morning, min 15°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 30°C on Thu afternoon, min 18°C on Tue night). Wind will be generally light.

Sat
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
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
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
WSW
6
1
W
6
0.7
W
6
0.4
WSW
9
0.4
WSW
9
0.4
WSW
9
0.5
W
5
0.4
WSW
8
0.4
WSW
9
0.3
WSW
9
0.3
WSW
8
0.3
W
8
0.3
W
8
0.3
W
10
0.3
W
10
0.3
W
9
0.3
W
9
0.5
W
9
0.5
W
9
0.5
W
8
0.5
W
8
Wave Graph
Metric surfscale
Energy kJ
83
69
36
29
26
25
13
24
26
15
13
12
13
17
16
15
15
42
39
35
33
Wind (km/h)
25
WSW
15
W
15
W
20
WSW
10
W
15
WSW
20
WSW
10
W
10
WSW
20
WSW
5
NNW
10
SE
5
W
10
NNE
10
SE
10
NNW
10
NE
10
ESE
5
NNE
15
E
10
E
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
glassy
cross-on
cross
off
cross-on
cross-off
cross-off
cross
cross-off
cross
cross
High Tide
10:01PM8.70m
10:18AM8.37m
10:39PM8.55m
10:56AM8.20m
11:19PM8.35m
11:39AM7.99m
00:06AM8.12m
12:30PM7.78m
1:04AM7.90m
1:35PM7.64m
2:14AM7.80m
2:51PM7.69m
3:31AM7.90m
Low Tide
4:05AM1.89m
4:14PM2.09m
4:42AM2.03m
4:52PM2.26m
5:24AM2.22m
5:38PM2.47m
6:13AM2.43m
6:34PM2.68m
7:14AM2.62m
7:46PM2.80m
8:27AM2.68m
9:05PM2.71m
9:43AM2.51m
clear
part cloud
part cloud
clear
part cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:05
5:05
5:07
5:07
5:09
5:09
5:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:35
9:35
9:34
9:34
9:32
9:31
9:31
9:30
 mm
Temp °C
16
16
19
19
16
18
19
17
19
21
20
23
26
24
24
30
25
27
31
27
26
Feels °C
13
15
17
16
15
16
17
17
17
18
19
24
26
24
24
29
24
26
30
26
25
Swell 1
Height (m)
Direction
Period (s)
0.6
W
10
1
W
6
0.7
W
6
0.4
WSW
9
0.4
WSW
9
0.4
WSW
9
0.3
W
8
0.4
WSW
8
0.4
WSW
9
0.3
WSW
9
0.3
WSW
8
0.3
W
8
0.3
W
8
0.3
W
10
0.3
W
10
0.3
W
9
0.3
W
9
0.5
W
9
0.5
W
9
0.5
W
8
0.5
W
8
Energy kJ
71
69
36
26
26
25
12
24
26
15
13
12
13
17
16
15
15
42
39
35
33
Swell 2
Height (m)
Direction
Period (s)
0.4
WSW
10
0.4
WSW
9
0.3
WSW
9
0.3
W
4
0.2
W
4
0.1
W
11
0.2
W
4
0.2
WNW
3
0.2
W
4
Energy kJ
31
28
15
3
1
2
1
1
1
Swell 3
Height (m)
Direction
Period (s)
0.1
W
10
Energy kJ
2
Wind waves
Height (m)
Direction
Period (s)
1.1
WSW
6
0.7
WSW
5
0.4
WSW
5
0.5
W
5
0.5
W
5
0.4
W
4
0.4
NW
3
0.3
NW
4
Energy kJ
83
29
7
13
13
6
3
2
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
340
1
20
133
140
171
183
127
177
190
72
72
72
72
72
189
72
15
15
21
20
Best forecast wave conditions in Wales - Gower
Rating
(10 max)
1
1
1
1
1
1
Best forecast wave conditions in United Kingdom
Rating
(10 max)
2
2
2
1
1
1
1
1
2
1
1
1
2
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
5
9
7
5
5
8
7
5
5
9
8
9
9
6
6
5
5
4
6
5
5
  • 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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