Crab Island Surf Forecast

/ Wales – Gower (29 surf breaks) /

UK (471 surf breaks) / Lat Long: (51.56° N 4.00° W)

Surf Forecasts:

Crab Island surfForecast / Wales – Gower / UK

12 Day Weather and Surf, issued 12 am Saturday 30 Aug 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 19.7° C
(Which is 3.5°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 Tuesday (Sep 02) at 1PM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.3m and 3s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Crab Island in the next 12 days are 3.0m 13s and forecast to arrive on Sunday (Aug 31) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Tuesday (Sep 02) at 7PM.

Wave Type	Time (BST) & Date	Wave Height & Period
Next good surf (1 star+)	1PM (Tue 2nd Sep)	4.5ft (1.4m) 9s
Best Surf	4PM (Wed 3rd Sep)	11ft (3.5m) 8s
Most Powerful	4PM (Sun 31st Aug)	10ft (3.0m) 13s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Heavy rain (total 32mm), heaviest during Sun night. Very mild (max 18°C on Sat afternoon, min 15°C on Sat night). Mainly strong winds.										Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Mon night. Very mild (max 18°C on Tue afternoon, min 13°C on Wed night). Winds decreasing (fresh winds from the WSW on Mon night, calm by Thu morning).
		Saturday 30			Sunday 31			Monday 01			Tuesday 02			Wednesday 03			Thursday 04			Fri 05
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	2	2	0	!	2	2	2	4	2	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	WSW	WSW	SW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW
Period(s) (?)	9	9	7	9	12	13	11	12	9	8	9	9	9	12	8	9	10	11	10	7	9
Wave Graph (?)
Energy (?)	433	286	300	1886	4253	2795	3747	2116	1685	830	321	287	361	678	1425	490	476	711	1350	227	222
Wind (km/h)	W	S	SSW	SW	SSW	SW	SSW	WSW	WSW	SW	ESE	NW	WNW	SSW	WSW	NW	SSW	WSW	N	WNW	WSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross	on	cross- on	cross- on	cross- on	cross- on	on	cross- on	cross	cross- on	cross	cross- off	cross- off	on	cross	cross- off	glass	cross	off	cross- off	cross
High Tide / height (m)	10:36PM 8.19	10:52AM 7.85		11:07PM 7.67	11:27AM 7.33		11:50PM 7.10	12:29PM 6.81		1:12AM 6.62		2:22PM 6.64	3:04AM 6.66		3:54PM 7.06		4:25AM 7.21	4:57PM 7.77		5:23AM 7.91	5:45PM 8.49
Low Tide / height (m)		4:34AM 2.54	4:50PM 2.77		5:05AM 3.07	5:31PM 3.35		5:52AM 3.65	6:48PM 3.89		7:41AM 4.08		8:46PM 3.93	9:31AM 3.84		10:08PM 3.42	10:42AM 3.20		11:07PM 2.71	11:33AM 2.49

		Saturday 30			Sunday 31			Monday 01			Tuesday 02			Wednesday 03			Thursday 04			Fri 05
Sunrise	-	6:24	-	-	6:24	-	-	6:26	-	-	6:28	-	-	6:30	-	-	6:31	-	-	6:33	-
Sunset	-	-	8:07	-	-	8:05	-	-	8:02	-	-	8:00	-	-	7:59	-	-	7:57	-	-	7:53

Rain (mm)	-	2	4	2	3	2	13	4	2	3	1	2	-	2	-	-	-	-	-	-	-
Temp. °C	17	17	18	16	17	17	16	17	17	16	16	18	15	16	16	15	17	18	16	17	17
Feels °C (?)	14	12	12	9	10	10	9	11	10	10	12	16	12	14	14	13	16	17	15	15	14

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Wales - Gower

Wind Update Continuing clean conditions at Crab Island (light winds from the SSW at Llethryd Barns 9 km from Crab Island). 1.0m 8s swell from the WSW with a 0.9m 9s swell, also from the WSW and a 0.3m 5s windswell, also from the W. 3 swells combining to make bigger set waves.
1 hour 0 minutes ago Crab Island

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1 h 0 min ago

9 km/h

SSW

Clean

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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.

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.