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Surf Forecasts:

Crab Island surfForecast / Wales – Gower / UK

information circle12 Day Weather and Surf, issued 6 am Thursday 18 Sep 2025 BST
Forecast update in hr  min  s Forecast update imminent
Crab Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Crab Island sea temperature is
17.4° C
 (Which is 1.8°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Crab Island this week:

The surf forecast for Crab Island over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 24) at 4PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.1m and 7s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Crab Island in the next 12 days are 2.1m 11s and forecast to arrive on Thursday (Sep 18) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Sunday (Sep 21) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 4PM (Wed 24th Sep)1.5ft (0.5m) 11s
Best Surf 4PM (Wed 24th Sep)1.5ft (0.5m) 11s
Most Powerful 1PM (Thu 18th Sep)7ft (2.1m) 11s

Table - best surf conditions forecast for Crab Island over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
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Short Range Forecast Light rain (total 5mm), mostly falling on Thu morning. Very mild (max 18°C on Thu afternoon, min 12°C on Sat night). Winds increasing (light winds from the SW on Fri night, near gales from the SW by Sat night).

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun afternoon. Very mild (max 15°C on Sun morning, min 9°C on Mon night). Winds decreasing (strong winds from the SW on Sun morning, light winds from the ENE by Tue night).

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.1
WSW
2.1
WSW
1.7
WSW
1.6
WSW
1.5
WSW
1.2
WSW
1
WSW
0.9
WSW
2.5
SW
1.4
NW
0.5
W
0.2
WSW
0.2
WSW
0.1
SW
0.1
W
0.1
W
0.1
W
0.2
WSW
0.4
WSW
0.5
W
0.6
W
Period(s) (?)121110101099976889131371412121110
Wave
Graph
(?)Metric surfscale
Energy kJ (?)12599885444724282481541246121623178731415466171
Wind
(km/h)
35
SW
35
SW
20
SSW
15
SSE
15
WSW
10
SSW
20
SE
25
SE
60
SW
50
SW
35
N
40
N
45
NNE
40
NNE
15
N
10
N
25
N
5
ENE
10
SE
0
N
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		ononcross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		offoffoffcross-
off		offoffoffcross-
off		cross-
on		glasscross-
off
High Tide
/ height (m)
5:05PM
8.20
5:38AM
8.38
5:58PM
8.82
6:25AM
8.88
6:40PM
9.22
7:03AM
9.16
7:16PM
9.40
7:35AM
9.28
7:47PM
9.44
8:04AM
9.30
8:15PM
9.39
8:31AM
9.25
8:41PM
9.27
Low Tide
/ height (m)
10:53AM
2.77
11:30PM
2.25
11:48AM
2.13
12:18AM
1.72
12:30PM
1.68
12:56AM
1.42
1:04PM
1.44
1:27AM
1.33
1:33PM
1.34
1:53AM
1.33
1:58PM
1.32
2:17AM
1.39
2:24PM
1.38
2:41AM
1.52
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Sunrise6:54--6:56--6:56--6:58--7:01--7:01--7:03--
Sunset-7:23--7:22--7:20--7:17--7:15--7:13--7:10-
rain showers
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
rain showers
rain showers
cloud
rain showers
light rain
cloud
part cloud
clear
clear
part cloud
part cloud
cloud
part cloud
part cloud
Rain (mm)
1------22-11---------
Temp. °C171817181816171815151312111311141414121414
Feels °C (?)131414171616161561264256111012101313
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Wales - Gower

  1. weather stationWind Update No recent live wind reports 14 km from Llangennith. A 2.2m groundswell from the SW

    1 hour 7 minutes ago Llangennith
Expand
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>
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3 h 7 min ago

22 km/h
SSW
Onshore
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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Crab Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Crab Island at:
surf-forecast.com

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 12 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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