Southerndown Surf Forecast

/ Wales – South East (14 surf breaks) /

UK (471 surf breaks) / Lat Long: (51.45° N 3.61° W)

Surf Forecasts:

Southerndown surfForecast / Wales – South East / UK

12 Day Weather and Surf, issued 12 am Thursday 18 Sep 2025 BST

Forecast update in hr min s Forecast update imminent

Southerndown surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Southerndown sea temperature is 17.5° C
(Which is 1.8°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Southerndown this week:

The surf forecast for Southerndown over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 19) at 10PM. The primary swell is predicted to be 1.1m and 10s period with a secondary swell of 0.1m and 16s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Southerndown in the next 12 days are 1.7m 12s and forecast to arrive on Thursday (Sep 18) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Monday (Sep 22) at 7AM.

Wave Type	Time (BST) & Date	Wave Height & Period
Next good surf (1 star+)	10PM (Fri 19th Sep)	3.5ft (1.1m) 10s
Best Surf	10PM (Fri 19th Sep)	3.5ft (1.1m) 10s
Most Powerful	4AM (Thu 18th Sep)	5.5ft (1.7m) 12s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 4mm), mostly falling on Wed night. Warm (max 21°C on Sat afternoon, min 14°C on Fri night). Winds decreasing (fresh winds from the SW on Wed night, calm by Fri night).										Days 3-6 Weather Summary Light rain (total 7mm), mostly falling on Sun morning. Very mild (max 17°C on Sat night, min 9°C on Mon night). Winds decreasing (fresh winds from the SE on Sun morning, light winds from the NNW by Tue afternoon).
		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wed 24
	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	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SW	W	W	W	W	W	—	—	W	WSW	WSW
Period(s) (?)	12	12	11	10	9	10	10	9	9	6	6	6	13	9	9	8	-	-	13	12	11
Wave Graph (?)
kJ (?)	1082	789	686	339	355	312	172	94	71	21	47	11	4	2	1	1	0	0	4	14	24
Wind (km/h)	WSW	SW	WSW	SSW	SSE	W	NE	ESE	SSE	S	SE	SE	ENE	ENE	ENE	NE	NNE	NNW	NE	E	SE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	on	on	on	cross- on	cross- on	cross- on	glass	cross- off	cross	cross- on	cross	cross	cross- off	off	off	off	off	cross- off	off	cross- off	glass
High Tide / height (m)		4:38AM 6.73	5:05PM 7.24		5:34AM 7.31	5:54PM 7.84		6:17AM 7.86	6:34PM 8.35		6:54AM 8.30		7:09PM 8.70	7:27AM 8.59		7:42PM 8.88	7:58AM 8.73		8:13PM 8.89	8:29AM 8.71
Low Tide / height (m)	10:33PM 2.42	11:00AM 2.32		11:33PM 1.86	11:50AM 1.74		12:16AM 1.32	12:29PM 1.24		12:50AM 0.90		1:01PM 0.84	1:20AM 0.61		1:31PM 0.59	1:48AM 0.47		1:59PM 0.48	2:16AM 0.48		2:28PM 0.54

		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wed 24
Sunrise	-	6:52	-	-	6:54	-	-	6:56	-	-	6:56	-	-	6:58	-	-	7:01	-	-	7:01	-
Sunset	-	-	7:22	-	-	7:21	-	-	7:17	-	-	7:15	-	-	7:14	-	-	7:10	-	-	7:08

Rain (mm)	3	1	-	-	-	-	-	-	-	-	1	2	3	1	-	-	-	-	-	-	-
Temp. °C	18	20	19	17	19	20	16	19	21	17	16	16	14	14	15	12	13	15	13	13	14
Feels °C (?)	15	17	16	15	18	19	16	18	19	13	10	10	10	7	8	6	9	12	10	10	12

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 - South East

Wind Update The wind is still cross-on at Southerndown (moderate winds from the W at St Athan 13 km from Southerndown). A 1.6m groundswell from the WSW
1 hour 5 minutes ago Southerndown

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1 h 5 min ago

26 km/h

Cross-On

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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 Southerndown 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 Southerndown Surf forecast

The above surf forecast table for Southerndown provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Southerndown can be found by selecting the local surf guide option on the grey menu. Our Southerndown 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 (Southerndown) 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 Southerndown 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.

Are you planning a holiday in Wales - South East? If you are looking for accommodation near Southerndown, camping, hotels and holiday cottages in Wales - South East, consider staying in Porthcawl which is 6 km (4 miles) away. Other places in and around Wales - South East where you can find information about places to rent, and car hire include Nash Point which is 8 km (5 miles) away, Coity, Maesteg and Barry.