Surf Forecasts:
Southerndown surf forecast from 15 Aug 2026:
- Best quality surf: Friday 21 Aug, 1AM (local time) - 2.5ft (0.7m), 6s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 7AM (local time) - 4ft (1.2m), 7s period, WSW swell with 139 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 1AM (local time) - 2.5ft (0.7m), 6s 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 Friday (Aug 21) at 1AM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Southerndown in the next 16 days are 1.2m 7s and forecast to arrive on Thursday (Aug 20) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Friday (Aug 21) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 21st Aug) | 2.5ft (0.7m) 6s |
| Best Surf | 1AM (Fri 21st Aug) | 2.5ft (0.7m) 6s |
| Most Powerful | 7AM (Thu 20th Aug) | 4ft (1.2m) 7s |
Table - best surf conditions forecast for Southerndown over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards.
To be straight with you, Southerndown is looking pretty quiet over this whole 16-day window. There’s no proper surf to get excited about. The water’s sitting at 70°F, which is much warmer than normal for this time of year – a real anomaly of 8°F above average. That’s the sort of thing you’d normally only see once in a long while.
We kick off Saturday 15 August. Morning brings glassy conditions with no wind at all, and a tiny 1ft swell from the WSW, but it’s short period at 8 seconds and the combined energy is weak (20). It’s a no-go for surfing. Saturday afternoon the onshore picks up from the WSW at 9 mph and the quality doesn’t improve.
Sunday 16 August is more of the same: a little 1.0ft to 1ft swell from the WSW, period dropping to 7 seconds, and cross-onshore wind that messes up the surface. Monday 17 August through to Tuesday 18 August only get a little bigger, up to 3ft, but the period stays short around 5 to 6 seconds, and the cross-onshore wind is moderate and choppy. The wave energy is still weak (combined energy under 100).
Wednesday 19 August pushes up to 3ft from the W, but still short period at 6 seconds and cross-onshore. Not worth paddling out.
Thursday 20 August is the closest we get to anything mildly interesting. The swell hits 4ft from the WSW, period nudges 7 seconds, and the combined energy climbs to 130 (moderate wave energy) in the morning. But it’s cross-onshore at 12 to 16 mph and the forecast calls it poor surf conditions. Not one to get excited about.
Friday 21 August the wind swings NNE early morning at 3 mph, offshore, and it’s clean. But the swell drops back to 2ft from the WSW, short period at 7 seconds, and the energy is weak (48). It’s surfable for a beginner on a longboard, but nothing to write home about.
From Saturday 22 August right through to Sunday 30 August, the swell stays tiny – mostly under 2ft – with periods all over the place from 4 seconds up to 15 seconds, but the energy is weak (combined energy under 40 most of the time). The wind is often offshore or cross-offshore, keeping the surface clean, but there’s simply not enough wave to ride. The setup looks more interesting for kite surfing than paddle surfing on most of those days, especially when the wind is up.
So, the honest truth: there are no standout days here. The best you can hope for is the morning of Friday 21 August with clean offshore wind and a tiny 2ft swell, but it’s for the beginners and longboarders only. For the rest, you’re waiting out a long gap of poor conditions. It tends not to stay this flat forever around here, and forecasts can always change, but for now, leave the board at home.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Sat afternoon, min 15°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Tue night. Very mild (max 19°C on Tue morning, min 14°C on Tue night). Winds decreasing (fresh winds from the W on Wed morning, calm by Thu night). | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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) | WSW 8 | WSW 8 | WSW 7 | WSW 7 | WSW 7 | W 4 | WSW 5 | W 5 | W 7 | WSW 6 | WSW 6 | W 6 | WSW 6 | W 6 | W 6 | WSW 7 | WSW 7 | WSW 6 | WSW 7 | W 6 | W 6 |
Wave Graph | |||||||||||||||||||||
20 | 19 | 18 | 11 | 18 | 5 | 10 | 27 | 17 | 46 | 45 | 23 | 53 | 69 | 88 | 121 | 99 | 43 | 48 | 50 | 15 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | off | cross-on | cross-off |
High Tide | 9:10PM9.36m | 9:30AM8.88m | 9:48PM8.99m | 10:07AM8.48m | 10:25PM8.43m | 10:44AM7.95m | 11:03PM7.76m | 11:22AM7.34m | 11:42PM7.06m | 12:04PM6.72m | 00:30AM6.40m | 1:00PM6.16m | 1:39AM5.89m | ||||||||
Low Tide | 2:55PM0.16m | 3:19AM0.19m | 3:32PM0.39m | 3:54AM0.55m | 4:07PM0.80m | 4:29AM1.07m | 4:44PM1.34m | 5:05AM1.67m | 5:23PM1.95m | 5:45AM2.30m | 6:09PM2.56m | 6:37AM2.88m | 7:14PM3.08m | ||||||||
5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | |
mm | — | — | — | — | — | — | — | — | — | 3 | 1 | 5 | — | — | 1 | — | — | — | — | 2 | — |
Temp °C | 20 | 22 | 18 | 19 | 19 | 17 | 19 | 18 | 18 | 19 | 19 | 18 | 18 | 18 | 16 | 18 | 17 | 16 | 18 | 19 | 16 |
Feels °C | 19 | 19 | 16 | 15 | 15 | 15 | 18 | 14 | 16 | 19 | 18 | 17 | 12 | 13 | 14 | 13 | 12 | 14 | 16 | 17 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | WSW 8 | WSW 7 | WSW 7 | — | WSW 7 | WSW 5 | W 8 | WSW 7 | — | W 17 | W 17 | SW 16 | W 10 | SW 16 | SW 15 | SW 14 | WSW 6 | WSW 7 | W 13 | W 6 |
20 | 19 | 18 | 11 | — | 5 | 10 | 6 | 10 | — | 6 | 6 | 11 | 2 | 10 | 9 | 8 | 43 | 48 | 3 | 15 | |
Swell 2 Height (m) Direction Period (s) | — | — | WNW 4 | WNW 4 | — | W 4 | WSW 7 | — | W 7 | — | — | — | — | — | W 16 | — | — | WSW 9 | — | — | SW 16 |
— | — | 1 | 1 | — | 2 | 5 | — | 17 | — | — | — | — | — | 5 | — | — | 26 | — | — | 10 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | — | — | W 13 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | — | — | 3 | |
Wind waves Height (m) Direction Period (s) | — | WNW 2 | — | — | WSW 7 | W 4 | W 5 | W 5 | W 5 | WSW 6 | WSW 6 | W 6 | WSW 6 | W 6 | W 6 | WSW 7 | WSW 7 | — | NNW 3 | W 6 | — |
— | 1 | — | — | 18 | 4 | 9 | 27 | 13 | 46 | 45 | 23 | 53 | 69 | 88 | 121 | 99 | — | 1 | 50 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 388 | 577 | 236 | 236 | 454 | 463 | 347 | 461 | 306 | 162 | 696 | 196 | 367 | 378 | 354 | 79 | 464 | 0 | 9 | 23 | 30 |
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.











