Crab Island Surf Break

Crab Island Surf Forecast and Surf Report

Lat Long: 51.56° N 4.00° W

Issued: 6 pm 03 Jul 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
19.3° C

4.7°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 3 Jul 2026:

  • Best quality surf: Sunday 5 Jul, 1AM (local time) - 1.5ft (0.5m), 10s period, W swell with cross-offshore winds.
  • Most powerful swell: Saturday 4 Jul, 1AM (local time) - 3ft (0.9m), 10s period, WSW swell with 170 kJ wave energy.
  • Next surfable swell (1★+): Sunday 5 Jul, 1AM (local time) - 1.5ft (0.5m), 10s period with W 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 1AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.8m and 6s. 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 10s and forecast to arrive on Saturday (Jul 04) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Saturday (Jul 11) at 1AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sun 5th Jul)1.5ft (0.5m) 10s
Best Surf 1AM (Sun 5th Jul)1.5ft (0.5m) 10s
Most Powerful 1AM (Sat 4th Jul)3ft (0.9m) 10s

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


Updates in  hr  min  s Forecast update imminent

Alright, Rusty here. Let's take a look at what's cookin'.

Honestly, mate, I've got to be straight with you. Looking at the whole 16-day window for Crab Island, it's a tough stretch. There's a massive gap of flat, poor conditions right from the start. The first row with any surf recommendation is a zero score, and it stays that way for the entire run, so there's basically no decent surf on offer at all for this whole period.

The earliest we see any surf is Friday the 3rd of July, but it's tiny - a 3ft swell from the WSW with a cross wind at 12 mph and a moderate cross-chop. The combined swell energy is weak at 135, and it's labelled as poor surf conditions. That sets the theme.

Moving through the week, we get a bit more size on Saturday the 4th afternoon, with a 4ft WSW swell, but the period is a short 6 seconds and the wind is a messy 16 mph cross. This is just sloppy, choppy junk.

For the next week or so, from the 5th of July right through to the 18th of July, it's nearly all the same: tiny swells mostly under 2ft, short and weak periods, and constant cross or cross-onshore winds. There are a couple of clean moments - like Tuesday morning the 7th with a light cross-offshore, and Thursday afternoon the 9th with a clean offshore - but the swell is barely 1.0ft. It's not surfable.

There's no standout in this whole outlook. Nothing is good enough to recommend. For a reef break that needs a decent southwest swell to light up, this is a barren run. We get a sniff of a very long-period swell on the 13th and 14th of July, 18 and 19 seconds from the SW, but the height is only 0.3ft. That's barely a bump.

This is one of those times where the forecast is just a write-off. A blank run like this is more normal for the area when the swell windows close up. We just have to wait for the next system to roll in. Forecasts change, but right now, there's no joy.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Sun morning, min 14°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 23°C on Tue afternoon, min 16°C on Mon night). Wind will be generally light.

Fri
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
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
1
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)
0.8
WSW
10
0.9
WSW
10
0.6
W
10
1.1
WSW
6
0.5
W
10
0.7
W
6
0.4
WSW
9
0.4
WSW
9
0.6
W
5
0.7
WSW
5
0.4
WSW
8
0.3
WSW
9
0.6
W
5
0.3
W
8
0.3
W
8
0.3
W
8
0.3
W
10
0.3
W
9
0.3
W
9
0.3
W
9
0.3
W
9
Wave Graph
Metric surfscale
Energy kJ
133
170
73
80
48
33
26
26
21
23
24
15
17
11
12
12
16
15
14
14
15
Wind (km/h)
20
WSW
15
WSW
20
W
25
W
15
WNW
15
W
20
WSW
10
W
15
WSW
25
WSW
10
WSW
15
W
20
W
10
W
10
SW
15
WSW
10
NNE
5
ESE
10
NNE
15
NE
20
ESE
Wind State
cross
cross-on
cross
cross
cross-off
cross
cross-on
cross
cross
cross
cross
cross-off
cross
cross-off
cross-on
cross-on
cross-off
cross-on
cross-off
cross-off
cross-on
High Tide
9:25PM8.80m
9:42AM8.49m
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
Low Tide
3:29AM1.82m
3:38PM1.97m
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
clear
cloud
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:03
5:05
5:05
5:07
5:07
5:09
5:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:36
9:35
9:35
9:34
9:34
9:32
9:31
9:31
 mm
Temp °C
15
15
18
18
18
20
19
16
18
18
16
22
23
21
22
23
22
23
28
26
27
Feels °C
12
14
14
14
17
17
16
15
15
15
15
19
22
21
21
21
21
22
27
25
26
Swell 1
Height (m)
Direction
Period (s)
0.8
WSW
10
0.9
WSW
10
0.6
W
10
0.6
W
10
0.8
WSW
6
0.7
W
6
0.4
WSW
9
0.4
WSW
9
0.3
WSW
9
0.3
W
8
0.4
WSW
8
0.5
W
5
0.3
WSW
9
0.4
WSW
4
0.3
W
8
0.3
W
8
0.3
W
10
0.3
W
9
0.3
W
9
0.3
W
9
0.3
W
9
Energy kJ
133
170
73
71
43
33
26
26
15
12
24
13
15
6
12
12
16
15
14
14
15
Swell 2
Height (m)
Direction
Period (s)
0.5
W
10
0.4
WSW
9
0.4
W
8
0.3
WSW
9
0.1
W
11
0.3
W
8
0.2
W
4
0.3
W
4
Energy kJ
48
28
22
15
2
11
1
3
Swell 3
Height (m)
Direction
Period (s)
0.2
W
10
Energy kJ
8
Wind waves
Height (m)
Direction
Period (s)
0.3
WSW
3
0.9
WSW
6
1.1
WSW
6
0.6
WSW
5
0.4
WSW
4
0.6
W
5
0.7
WSW
5
0.5
W
4
0.6
W
5
0.3
W
4
Energy kJ
2
58
80
21
6
21
23
10
17
3
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)
152
139
361
360
0
133
133
183
183
183
183
427
262
86
127
190
72
72
189
86
72
Best forecast wave conditions in Wales - Gower
Rating
(10 max)
1
Best forecast wave conditions in United Kingdom
Rating
(10 max)
1
4
3
2
2
2
1
1
1
2
3
2
2
1
2
1
2
1
1
1
Header Global
Rating
(10 max)
7
5
6
5
9
7
5
6
8
7
4
5
9
8
9
6
5
5
8
5
8
  • 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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