Crab Island Surf Break

Lat Long: 51.56° N 4.00° W

Crab Island Surf Forecast and Surf Report

Issued: 6 am 20 Jul 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
20.7° C
5.0° 

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 20 Jul 2026:

  • Best quality surf: Saturday 25 Jul, 10PM (local time) - 4ft (1.2m), 6s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Saturday 25 Jul, 10PM (local time) - 4ft (1.2m), 6s period, WSW swell with 119 kJ wave energy.
  • Next surfable swell (1★+): Saturday 25 Jul, 10PM (local time) - 4ft (1.2m), 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 Saturday (Jul 25) at 10PM. The primary swell is predicted to be 1.2m and 6s period. 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 1.2m 6s and forecast to arrive on Saturday (Jul 25) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Sunday (Jul 26) at 4PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Sat 25th Jul)4ft (1.2m) 6s
Best Surf10PM (Sat 25th Jul)4ft (1.2m) 6s
Most Powerful10PM (Sat 25th Jul)4ft (1.2m) 6s

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


The Lowdown

Alright, grab a coffee and settle in, because I’m gonna be straight with you: the next 16 days at Crab Island are looking like a real struggle. We’ve got a long stretch of crummy, tiny surf ahead, so don’t get your hopes up too high.

The first record we’ve got is for Monday the 20th of July, and it’s a real kick in the teeth. We’re talking about a tiny 0.3ft wave from the west, with a 12-second period. The swell energy is a measly 5 (weak), and despite glassy conditions in the morning, that water temp is a very unusual 69°F – which is a massive 9°F warmer than normal for this time of year. It’s a weird feeling out there, but the waves are just too small to bother with.

The whole first week is a write-off. From Monday the 20th right through to Friday the 24th, we’re stuck with flat, 0.3ft to 0.7ft dribble. The swell energy is stuck in the single digits. Even when the wind goes glassy, like on Wednesday morning the 22nd, there’s just nothing to push you around. It’s a total surf drought.

Things start to get a little more interesting around the weekend. By Saturday the 25th, the swell picks up a touch, but it’s still a messy cross-shore mess. The highlight of the whole forecast is probably going to be Sunday the 26th of July. We’ve got a northwest swell of 4ft coming in, with a 6-second period, and the combined energy climbs to 184 (moderate). The wind is a clean cross-offshore from the NNW, which is about as good as it gets for Crab Island. It’s not a world-class wave, but it’s the best we’ll see for a while. The crowd factor is listed as “sometimes,” so you might have a few others out there, but with the surf being so inconsistent otherwise, it might be worth a paddle.

After that, we slip back into smaller stuff. Monday the 27th is glassy but tiny at 2ft. Tuesday the 28th is a bit better with a 3ft cross-off swell, but the period is short and the energy is only 42. Wednesday the 29th sees a 3ft swell with a 19 mph cross-off wind, giving a clean face but a bit of a fight to get out. The energy is 138 (moderate), which is decent, but that strong wind will make it lumpy.

The second week from the 30th of July through to the 4th of August is a real snooze-fest. The swell drops back to 0.3ft to 2ft, with periods all under 10 seconds. The only real standout is the morning of Tuesday the 4th of August, where we get a 2ft west swell with a 6-second period, and a clean offshore wind from the NNW blowing at 9 mph. The combined energy is 21 (weak), but that offshore wind will make it look a lot better than the numbers suggest. Still, it’s a far cry from a proper session.

Bottom line: this is a tough stretch for Crab Island. The best bet is that Sunday the 26th of July with the 4ft clean swell, but even that is a short-period, lumpy affair. After that, it’s a wasteland until the 4th of August, when the offshore wind might make a tiny wave feel special. It’s a long wait for not much reward.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 23°C on Tue afternoon, min 13°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 24°C on Thu afternoon, min 13°C on Sat night). Wind will be generally light.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
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
1
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)
0.1
W
12
0.1
W
11
0.3
NW
4
0.1
W
11
0.1
W
10
0.1
W
16
0.2
W
10
0.2
W
9
0.2
W
9
0.2
W
9
0.1
W
8
0.1
W
8
0.1
W
13
0.4
WSW
3
0.3
W
3
0.4
W
4
1
W
5
1.1
WSW
7
1.1
WNW
6
0.7
W
6
0.5
W
7
Wave Graph
Metric surfscale
Energy kJ
3
2
2
2
2
5
8
7
6
6
1
1
3
2
2
6
42
111
104
36
24
Wind (km/h)
5
SE
15
WNW
10
NNE
5
SSE
15
W
15
N
5
ENE
10
W
15
NNE
5
SSE
15
W
10
NNW
10
WSW
25
W
5
W
20
W
20
W
10
NW
20
NNW
25
NW
10
N
Wind State
glassy
cross-off
off
on
cross
off
glassy
cross
cross-off
glassy
cross-off
off
cross
cross
cross
cross-off
cross
cross-off
cross-off
cross-off
off
High Tide
11:23AM8.43m
11:40PM8.45m
12:03PM7.96m
00:23AM7.94m
12:51PM7.52m
1:15AM7.47m
1:53PM7.20m
2:22AM7.17m
3:07PM7.14m
3:36AM7.15m
4:18PM7.38m
4:45AM7.40m
5:18PM7.78m
Low Tide
5:21PM2.03m
5:48AM2.25m
6:03PM2.48m
6:32AM2.72m
6:55PM2.92m
7:29AM3.13m
8:02PM3.24m
8:40AM3.34m
9:16PM3.29m
9:53AM3.26m
10:24PM3.08m
10:57AM2.97m
11:22PM2.74m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:22
5:24
5:24
5:26
5:28
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:22
9:21
9:19
9:17
9:16
9:15
9:14
 mm
Temp °C
20
22
19
21
23
19
19
22
21
22
24
20
20
22
18
17
16
17
18
19
16
Feels °C
17
18
16
20
20
15
18
19
18
21
21
18
17
17
16
14
13
16
13
13
13
  • Map Icons:
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  • 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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