Surf Forecasts:
Southerndown surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 9s period, WSW swell with offshore winds.
- Most powerful swell: Tuesday 25 Aug, 10AM (local time) - 5.5ft (1.7m), 9s period, SW swell with 461 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 9s period with WSW swell.
Best Forecast Surf Conditions for Southerndown this week:
The surf forecast for Southerndown over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 10PM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.1m and 14s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Southerndown in the next 16 days are 1.7m 9s and forecast to arrive on Tuesday (Aug 25) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Friday (Aug 21) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 20th Aug) | 3ft (0.9m) 9s |
| Best Surf | 10PM (Thu 20th Aug) | 3ft (0.9m) 9s |
| Most Powerful | 10AM (Tue 25th Aug) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Southerndown over the next 16 days.
The Lowdown
Alright folks, this is Rusty, and let me walk you through what’s happening at Southerndown over the next couple of weeks. It’s gonna be a tough watch for the most part.
For a solid week, from today the 18th, all the way through to the 25th, the surf is flat to near-flat. We’re looking at waves mostly under 3 ft, blown out by cross-onshore winds. The combined energy is weak to moderate at best (reading between 51 and 135), but with that wind, it’s just messy, lumpy junk. There’s a clean moment on Friday the 21st morning with a light offshore breeze from the ENE, but the swell is only 2 ft—hardly worth the wetsuit. The water is running at 69°, which is a massive 8° warmer than usual for this time of year. That’s really unusual, almost feels like a warm bath, but there’s just nothing to ride.
The only day that catches my eye is Tuesday the 25th. We finally get a pulse of swell hitting 6 ft from the SW with a 9-second period. The wind shifts cross-offshore from the ESE, and the combined energy pumps up to 755 (strong wave energy). That’s the standout number in this whole outlook. It’ll be the biggest and cleanest we’ve seen, but at 6 ft, it’s too big for beginners at this exposed spot. For the experienced crew, it’s your only real chance to get a wave. After that, it’s back to tiny, choppy dribble right through to the start of September, with energy barely reaching 100 and wind switching back to onshore or cross-onshore. We get a couple of glassy moments on the 23rd morning and the 28th afternoon, but the swell is a pathetic 0.5 ft to 2 ft. Flat.
So, bottom line: if you’re desperate, hit the morning of Tuesday the 25th. Otherwise, give it a miss. The board can wait.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Tue night. Very mild (max 19°C on Tue morning, min 11°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Sat afternoon, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | W 7 | WSW 6 | WSW 6 | WSW 6 | WSW 5 | WSW 7 | WSW 7 | W 7 | W 9 | W 8 | WSW 8 | WSW 8 | WSW 10 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | WSW 9 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 110 | 66 | 53 | 40 | 59 | 131 | 111 | 127 | 101 | 35 | 22 | 14 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 154 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | off | off | cross-on | cross-off | cross-off | cross | cross-off | glassy | cross-on | cross-off | cross | cross-on | cross-off |
High Tide | 10:44AM7.95m | 11:03PM7.76m | 11:22AM7.34m | 11:42PM7.06m | 12:04PM6.72m | 00:30AM6.40m | 1:00PM6.16m | 1:39AM5.89m | 2:24PM5.84m | 3:16AM5.76m | 4:00PM5.98m | 4:38AM6.08m | 5:06PM6.47m | ||||||||
Low Tide | 4:44PM1.34m | 5:05AM1.67m | 5:23PM1.95m | 5:45AM2.30m | 6:09PM2.56m | 6:37AM2.88m | 7:14PM3.08m | 7:53AM3.28m | 8:46PM3.31m | 9:31AM3.29m | 10:20PM3.09m | 10:50AM2.91m | 11:23PM2.60m | ||||||||
 | |  |  | | | | |  | | | | |  |  | | | | | | | |
 | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — |
 | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — |
mm | — | — | 2 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 18 | 17 | 18 | 18 | 16 | 18 | 19 | 15 | 18 | 18 | 17 | 17 | 19 | 17 | 17 | 19 | 17 | 20 | 22 | 18 |
Feels °C | 17 | 13 | 14 | 15 | 12 | 12 | 13 | 15 | 12 | 16 | 15 | 14 | 14 | 16 | 14 | 15 | 15 | 15 | 17 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 17 | W 17 | WSW 6 | W 16 | SW 16 | WSW 7 | SW 15 | W 9 | W 8 | WSW 8 | WSW 8 | WSW 10 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | W 3 | WSW 8 | WSW 9 | W 7 |
| kJ | 110 | 6 | 6 | 40 | 5 | 10 | 111 | 8 | 101 | 35 | 22 | 14 | 9 | 8 | 8 | 8 | 8 | 2 | 7 | 7 | 100 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 16 | — | W 9 | SW 15 | — | SW 14 | — | W 13 | WNW 3 | SW 15 | SW 15 | SW 15 | — | SW 14 | WSW 8 | — | SW 14 | W 11 |
| kJ | — | — | — | 11 | — | 6 | 8 | — | 8 | — | 3 | 1 | 9 | 9 | 9 | — | 8 | 7 | — | 8 | 10 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 16 | — | — | W 14 | — | — | SW 16 | W 15 | — | W 15 | SW 14 | — | SW 14 | SW 14 | — | — |
| kJ | — | — | — | — | — | 5 | — | — | 4 | — | — | 10 | 5 | — | 4 | 8 | — | 8 | 8 | — | — |
Wind waves Height (m) Direction Period (s) | — | WSW 6 | WSW 6 | — | WSW 5 | WSW 7 | — | W 7 | — | — | NE 3 | — | — | — | WNW 3 | — | — | — | — | SW 2 | WSW 7 |
| kJ | — | 66 | 53 | — | 59 | 131 | — | 127 | — | — | 1 | — | — | — | 1 | — | — | — | — | 1 | 154 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 165 | 444 | 30 | 49 | 353 | 165 | 79 | 79 | 0 | 30 | 196 | 81 | 56 | 113 | 92 | 103 | 195 | 210 | 210 | 174 | 0 |
Best forecast wave conditions in Wales - South East | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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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 16 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.
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