Crab Island Surf Break

Lat Long: 51.56° N 4.00° W

Crab Island Surf Forecast and Surf Report

Issued: 12 am 28 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 28 Jul 2026:

  • Most powerful swell: Thursday 30 Jul, 1PM (local time) - 3ft (0.9m), 6s period, WSW swell with 60 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 0.9m 6s and forecast to arrive on Thursday (Jul 30) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Monday (Aug 03) at 10PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1PM (Thu 30th Jul)3ft (0.9m) 6s

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


The Lowdown

Alright, listen up. I'm looking at the charts for Crab Island, and I've got to level with you. It's a quiet stretch. The wave energy is just not there, and the wind is often a nuisance. We're looking at a long dry spell with nothing really standing up and saying "surf me."

Right now, on Monday, July 27th, it's poor. We've got a tiny 3ft swell from the WSW, but it's a short-period, 6-second windswell. A cross-onshore wind is making it choppy and messy. The combined energy is a weak 66, so there's no power. The water is a warm 69°F, which is *much* warmer than normal for this time of year – that's a 9°F anomaly, so it's like swimming in a bath, but the waves are a no-show.

This pattern sticks through the end of July and into the start of August. The swell is tiny, between 1ft and 3ft, with periods of 5 to 6 seconds, and the wind is mostly cross or cross-onshore from the west. The combined energy is stuck in the double digits – 12 to 46 – which is weak. There are a few cleaner moments, like Friday morning, July 31st, with a light cross-offshore breeze, and Saturday morning, August 1st, but the swell is just too small. It's a flat spell.

The first week of August is more of the same. Sunday, August 2nd, has a brief moment of gentle offshore wind from the NNW, but the swell is only 1ft, so it's a lake. The combined energy is a pathetic 16. We get a few cleaner days around the 5th and 6th of August, with cross-offshore winds, and even a glassy moment on the afternoon of the 6th, but the swell is a tiny 1ft. It's a beautiful, clean, flat ocean.

Then, around August 8th, the swell *does* finally show up. We see a jump to 6ft on Saturday morning, and 7ft on Saturday afternoon from the WSW, with a combined energy that jumps to 437 and 481 – that's moderate wave energy. But here's the catch: the wind is a fresh cross-onshore breeze, blowing at 19 mph, making it lumpy and choppy. The period is only 8 seconds, so it's a short-period windswell, not a clean groundswell. The conditions are poor, and honestly, with that kind of wind and chop, this setup looks more interesting for kite surfing than paddle surfing. This messy, windy swell continues into Sunday, August 9th, and Monday, August 10th, before fading back to nothing by Tuesday, August 11th.

So, what's the standout? Honestly, there isn't one. Nothing in this 16-day window is worth calling a standout. The best you can hope for are the clean, glassy days around August 6th, but with zero swell. If you're desperate for a paddle and a float, the calmest days are your best bet. But for real waves? We're waiting for a better forecast. Keep your board waxed and your eyes on the horizon. These things can change.

Rusty

Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 22°C on Sun afternoon, min 13°C on Thu night). Wind will be generally light.

Tuesday
28
Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
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)
0.7
WSW
6
0.6
W
5
0.5
W
5
0.4
WSW
5
0.5
W
5
0.6
W
4
0.9
W
6
0.9
WSW
6
0.6
W
5
0.5
W
5
0.7
W
5
0.2
W
11
0.3
WSW
10
0.6
W
5
0.3
WSW
8
0.3
WSW
8
0.3
WSW
8
0.3
WSW
8
0.3
WSW
8
0.4
SW
8
0.3
WSW
8
Wave Graph
Metric surfscale
Energy kJ
33
19
12
8
12
13
48
58
20
13
27
9
19
16
14
13
13
13
13
17
13
Wind (km/h)
15
SW
15
W
5
NW
10
WSW
20
WSW
10
W
20
WNW
25
W
5
NNW
15
WNW
25
W
10
WNW
15
WNW
25
W
15
NNW
5
ENE
20
WSW
15
NE
20
SE
5
S
10
ESE
Wind State
cross-on
cross
glassy
cross-on
cross-on
cross
cross-off
cross
glassy
cross-off
cross
cross-off
cross-off
cross
off
glassy
cross
cross-off
cross-on
glassy
cross-on
High Tide
6:27AM8.12m
6:47PM8.55m
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
Low Tide
12:31PM2.27m
00:51AM2.06m
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
cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
cloud
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:31
5:33
5:35
5:37
5:37
5:39
5:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:10
9:08
9:07
9:06
9:05
9:02
9:00
 mm
Temp °C
19
20
17
18
19
17
17
17
16
17
17
16
17
18
16
19
22
18
24
27
20
Feels °C
18
19
18
17
16
16
12
12
13
12
12
13
13
14
12
16
19
13
21
25
19
  • 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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