Crab Island Surf Break

Lat Long: 51.56° N 4.00° W

Crab Island Surf Forecast and Surf Report

Issued: 12 am 29 Jul 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
20.7° C
4.8° 

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 29 Jul 2026:

  • Most powerful swell: Saturday 1 Aug, 4PM (local time) - 2.5ft (0.8m), 9s period, W swell with 103 kJ wave energy.

Best Forecast Surf Conditions for Crab Island this week:

The most powerful waves expected at Crab Island in the next 16 days are 0.8m 9s and forecast to arrive on Saturday (Aug 01) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 01) at 10PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 4PM (Sat 1st Aug)2.5ft (0.8m) 9s

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


The Lowdown

Alright folks, Rusty here. Let's cut straight to it; the outlook for Crab Island over the next couple of weeks is a bit of a tough pill to swallow. We’re looking at a whole lot of small, weak swell and iffy conditions. There’s a stretch from now until early August where it’s basically not worth paddling out for a proper wave. The real talk is that we’ve got a good ten-day gap here with nothing that I’d honestly recommend. The wave energy is almost non-existent for most of that, with combined swell energy barely cracking double digits.

The first time we see anything that even looks like surf is on Saturday, August 1st. The morning is clean with a light WNW cross-offshore breeze, but the swell is tiny at 1.0 ft from the WSW with a long 10-second period. That long period from a WSW direction at a break that prefers a clean SW swell isn't ideal, and it'll be inconsistent. The combined energy is still weak at 31. The afternoon picks up a bit – swell bumps to 3 ft from the W with a 9-second period, and the combined energy hits a moderate 119. But it’s choppy with a cross-shore wind. It’s not the day to get excited about.

Sunday, August 2nd stays small at 1.0 ft from the WSW, but the afternoon session goes glassy with a light ESE breeze. Paddling out will be easy but you’ll be scratching for tiny waves.

Monday, August 3rd brings the closest thing to a standout, but it’s still a 1 to 2 foot day at best. The afternoon has a moderate offshore breeze from the NNW, cleaning things up nicely on the 1 ft SW swell. The period is only 8 seconds, so it’s not got much punch, but that clean, glassy surface makes it the best bet in a weak run. The water temp feels about normal for this time of year, so no shock to the system there.

After that, from August 4th through until August 11th, it’s back to tiny dribble. Swells drop to 0.7 ft and 0.3 ft with combined energy in the single digits. There are a few glassy mornings on the 5th, 7th, and 12th of August, but with a 0.7 ft to 1.0 ft swell, you’re literally just floating around.

Tuesday, August 12th sees a slight uptick – a glassy morning with a 1.0 ft W swell. The period is a weak 5 seconds though, so no real push. By the afternoon, it’s back to being blown out by a moderate cross-shore wind. There’s just no proper swell on the cards.

So, to wrap it up: there’s no proper surf for the next ten days, then a few marginal, knee-high days with clean conditions. The pick of the litter is Monday afternoon, August 3rd with that offshore wind on a tiny, weak swell. It’s not going to win any awards, but it’s the best of a poor bunch. Keep the board waxed and watch the charts – it can’t stay this flat forever.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 20°C on Wed afternoon, min 15°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Some drizzle, heaviest during Mon afternoon. Warm (max 20°C on Mon morning, min 13°C on Fri night). Wind will be generally light.

Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
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)
0.4
WSW
5
0.5
W
5
0.2
W
10
0.7
W
6
0.8
W
5
0.5
W
5
0.5
W
5
0.6
W
5
0.2
WSW
11
0.3
WSW
10
0.8
W
9
0.4
WSW
8
0.3
WSW
8
0.3
WSW
8
0.4
SW
9
0.4
WSW
8
0.4
SW
8
0.4
SW
8
0.3
SW
7
0.3
SW
7
0.2
WSW
7
Wave Graph
Metric surfscale
Energy kJ
9
12
8
29
32
12
12
17
12
19
103
24
13
13
21
28
17
16
8
8
5
Wind (km/h)
10
SW
20
W
15
W
20
WNW
25
W
5
N
10
SSE
25
W
10
NNW
10
WNW
25
W
15
NNE
5
SE
5
ESE
15
NE
20
ESE
20
NNW
5
WSW
10
NW
15
WNW
10
NNE
Wind State
cross-on
cross
cross
cross-off
cross
off
on
cross
cross-off
cross-off
cross
off
cross-on
glassy
cross-off
cross
off
cross
cross-off
cross-off
cross-off
High Tide
7:06AM8.42m
7:24PM8.82m
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
Low Tide
1:08PM1.99m
1:28AM1.79m
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
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
light rain
rain showers
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:33
5:35
5:37
5:37
5:39
5:41
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:08
9:07
9:06
9:05
9:02
9:00
9:00
 mm
1
3
Temp °C
18
20
17
17
18
16
18
18
15
17
18
17
18
18
18
20
18
16
18
19
14
Feels °C
17
18
16
12
13
13
15
12
11
12
13
13
15
17
14
19
14
15
16
15
11
  • 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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