Crab Island Surf Break

Lat Long: 51.56° N 4.00° W

Crab Island Surf Forecast and Surf Report

Issued: 12 am 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
20.6° C
4.6° 

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 30 Jul 2026:

  • Best quality surf: Monday 3 Aug, 1PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with glassy winds.
  • Most powerful swell: Monday 3 Aug, 7AM (local time) - 2.5ft (0.7m), 9s period, WSW swell with 70 kJ wave energy.
  • Next surfable swell (1★+): Monday 3 Aug, 1PM (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 Monday (Aug 03) at 1PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.3m 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 0.7m 9s and forecast to arrive on Monday (Aug 03) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 04) at 1AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Mon 3rd Aug)2.5ft (0.7m) 9s
Best Surf 1PM (Mon 3rd Aug)2.5ft (0.7m) 9s
Most Powerful 7AM (Mon 3rd Aug)2.5ft (0.7m) 9s

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 – this is a tough outlook for Crab Island. Over the next two weeks, we're looking at a real dry spell. The surf is going to be small and the conditions are more about flat spells than anything worth paddling out for. It's a blank run, and for this area, that's not unusual when the swell windows don't line up. But don't lose hope, forecasts can change, and it rarely stays this poor for long.

We start off Thursday the 30th of July with nothing to write home about. A tiny 2 ft swell from the west, with a short period of 5 seconds, meaning weak, gutless waves. The combined energy is a measly 27 (weak energy), and the wind is cross-off from the north-west at 9 mph, which is actually clean, but the swell is too small to do anything with. It's poor surf conditions, plain and simple.

Friday the 31st of July is even worse. The swell drops to 0.3 ft in the morning, with a long period of 9 seconds, but there's no energy behind it. The combined energy is just 3 (weak energy). The wind stays cross-off and clean, but you'd be chasing whitewash.

Saturday the 1st of August sees a similar story: 2 ft of west swell, 5-second period, combined energy of 40 (weak energy). The cross-off wind in the morning keeps it clean, but the waves are tiny and weak. Sunday the 2nd of August offers a brief moment of calm with a glassy morning and 1 ft of swell from the west-southwest, but the combined energy is only 15 (weak energy). It's a pretty scene, but not a surfing one.

The following week, from Monday the 3rd of August through to Monday the 10th of August, is more of the same. The swell height maxes out at 2 ft on Monday the 3rd, with a combined energy of 71 (weak energy), but the wind is cross-shore and the wave quality is poor. The water temperature is about average for this time of year, so no thermals needed.

The second week, from Tuesday the 11th of August onwards, sees the swell bottom out. We're looking at 0.3 ft to 0.7 ft of swell for most of the week, with combined energy values in the single digits. There are a couple of glassy moments on Wednesday the 12th and Thursday the 13th of August, with 2 ft and 1 ft of swell respectively, but the energy is still weak (20 and 9). Nothing here is going to get you excited.

Honestly, there's no standout. There's no one or two days to highlight. The best you could hope for is a session on the 2 ft days with glassy conditions, but even then, it's a marginal surf. It's a real bummer, but that's the way it goes sometimes.

Stay patient.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Thu afternoon, min 13°C on Thu night). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 25°C on Mon afternoon, min 14°C on Sat night). Wind will be generally light.

Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
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
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)
0.6
W
5
0.5
W
5
0.4
W
4
0.1
W
9
0.8
W
5
0.5
W
4
0.6
W
5
0.6
W
5
0.4
WSW
8
0.4
WSW
8
0.3
WSW
8
0.5
WSW
9
0.7
WSW
9
0.7
WSW
8
0.5
SW
8
0.4
WSW
8
0.4
SW
7
0.4
SW
7
0.3
SW
7
0.3
SW
7
0.7
E
3
Wave Graph
Metric surfscale
Energy kJ
19
12
6
2
37
8
21
17
24
22
13
49
70
62
32
22
14
12
8
11
11
Wind (km/h)
15
NW
25
W
10
N
15
NW
30
W
10
WNW
10
WNW
25
W
10
N
10
E
5
E
15
NNE
10
ESE
10
W
15
ENE
10
SE
10
WSW
20
E
15
SE
20
W
10
WNW
Wind State
cross-off
cross
off
cross-off
cross
cross-off
cross-off
cross
off
cross
glassy
off
cross
cross
cross-off
cross-on
cross
cross
cross-on
cross
cross-off
High Tide
7:42AM8.66m
7:59PM9.04m
8:16AM8.84m
8:33PM9.18m
8:49AM8.96m
9:07PM9.24m
9:22AM8.97m
9:40PM9.18m
9:54AM8.86m
10:13PM9.00m
10:28AM8.65m
10:49PM8.70m
11:05AM8.34m
11:30PM8.31m
Low Tide
1:43PM1.77m
2:03AM1.57m
2:15PM1.60m
2:37AM1.43m
2:47PM1.51m
3:09AM1.37m
3:18PM1.51m
3:41AM1.44m
3:50PM1.63m
4:14AM1.63m
4:23PM1.85m
4:49AM1.92m
5:02PM2.18m
cloud
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
part cloud
part cloud
clear
part cloud
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:37
5:37
5:39
5:41
5:43
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:07
9:06
9:05
9:02
9:00
9:00
8:58
 mm
Temp °C
18
19
17
17
17
16
17
17
16
19
22
21
21
25
22
20
20
18
17
18
16
Feels °C
16
14
14
12
11
13
13
12
13
16
20
18
21
21
18
18
19
17
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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