Surf Forecasts:
Southerndown surf forecast from 31 Aug 2026:
- Most powerful swell: Monday 31 Aug, 1PM (local time) - 5ft (1.6m), 10s period, WSW swell with 426 kJ wave energy.
Best Forecast Surf Conditions for Southerndown this week:
The most powerful waves expected at Southerndown in the next 16 days are 1.6m 10s and forecast to arrive on Monday (Aug 31) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Mon 31st Aug) | 5ft (1.6m) 10s |
Table - best surf conditions forecast for Southerndown over the next 16 days.
The Lowdown
Alright, let's get stuck in. I’m looking at Southerndown for the next couple of weeks, and I’ve got to be straight with you: it's a bit of a write-off. The whole forecast period is looking pretty grim with a whole heap of wind and chop, and even when the swell shows up, the quality is just not there.
To make matters more interesting, the water is sitting at 69°F, which is a solid 8°F above the long-term average. That’s a seriously warm ocean for this time of year.
The entire first week is a mess. We’ve got a lot of onshore and cross-onshore winds. The swell is small and the periods are short, so it’s just a shapeless, blown-out mess. There’s a bump in the swell on the 4th and 5th, getting to around 6ft, but it’s attached to a 35 km/h cross-onshore wind, so it's all lumpy and won't be any good.
Our first real chance comes on Tuesday, September 9th. It’s not big, maybe 3ft of West swell with an 11-second period. The wind is light, which will help keep the surface tidy, even if it is cross-on. It’s a small window but the cleanest it’s been.
Then we get those smaller, cleaner days on the 11th and 12th of September. Swell drops right off to about 1ft, but we get some offshore and cross-offshore winds. It'll be glassy and clean, but it’s really tiny. You’d need a longboard, and even then you might be struggling.
Finally, the only real swell of any size is on September 15th. That’s a 8ft WSW swell with a strong 878 energy reading behind it. It’s got some push. But it comes with a brutal 45 km/h onshore wind. That’s going to be a full-on, blown-out mess. That’s not a surf day; that’s a kite-surfing day if anything. Too messy for a paddle.
So, what’s the verdict? The only ones with any shine on them are those little glassy days on the 11th and 12th, but they’re tiny. The bigger swell on the 15th is big, but it’s going to be all wind and no shape. Not a classic stretch, but things can change. The forecast for this area doesn't tend to stay bad for long, so keep an eye on it.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Wed morning. Very mild (max 19°C on Wed afternoon, min 15°C on Mon morning). Winds increasing (light winds from the W on Mon night, fresh winds from the WSW by Wed afternoon). | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Thu afternoon. Very mild (max 19°C on Thu morning, min 13°C on Sat night). Winds decreasing (fresh winds from the W on Fri morning, calm by Sat night). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 9 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 5 | WSW 6 | WSW 7 | WSW 8 | WSW 7 | WSW 7 | WSW 7 | W 7 | WSW 7 | W 7 | W 7 | W 6 | W 6 | W 9 | WSW 9 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 461 | 426 | 193 | 28 | 108 | 20 | 47 | 186 | 151 | 180 | 172 | 183 | 270 | 355 | 272 | 134 | 84 | 27 | 43 | 27 | 6 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross-on | cross | on |
High Tide | 9:20PM9.04m | 9:38AM8.75m | 9:57PM8.76m | 10:17AM8.41m | 10:38PM8.28m | 11:00AM7.92m | 11:25PM7.66m | 11:52AM7.32m | 00:25AM7.00m | 1:01PM6.77m | 1:47AM6.53m | 2:33PM6.57m | 3:24AM6.57m | ||||||||
Low Tide | 3:00PM0.35m | 3:19AM0.40m | 3:33PM0.53m | 3:54AM0.69m | 4:10PM0.88m | 4:33AM1.15m | 4:54PM1.40m | 5:20AM1.75m | 5:49PM2.00m | 6:24AM2.36m | 7:09PM2.53m | 7:57AM2.74m | 8:57PM2.62m | ||||||||
 |  |  | | |  |  |  |  | | |  | | |  |  | | | | | | |
 | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — |
 | — | 8:04 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — | — | 7:54 | — | — | 7:52 | — | — | 7:50 | — |
mm | — | — | — | — | — | — | 1 | 2 | 2 | 2 | 4 | 10 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 16 | 17 | 18 | 17 | 18 | 19 | 18 | 19 | 19 | 17 | 17 | 17 | 16 | 16 | 17 | 15 | 16 | 17 | 16 |
Feels °C | 11 | 11 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 10 | 10 | 10 | 12 | 13 | 13 | 15 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | — | — | WSW 10 | WSW 9 | — | WSW 8 | W 16 | — | SW 15 | W 15 | W 16 | SW 15 | — | — | — | — | W 14 | W 6 | W 9 | WSW 9 | WSW 5 |
| kJ | — | — | 193 | 26 | — | 6 | 5 | — | 9 | 4 | 5 | 9 | — | — | — | — | 4 | 27 | 43 | 27 | 6 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 10 | — | — | W 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 19 | — | — | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 9 | WSW 10 | — | WSW 6 | WSW 9 | WSW 5 | WSW 6 | WSW 7 | WSW 8 | WSW 7 | WSW 7 | WSW 7 | W 7 | WSW 7 | W 7 | W 7 | W 6 | — | — | — | — |
| kJ | 461 | 426 | — | 28 | 108 | 20 | 47 | 186 | 151 | 180 | 172 | 183 | 270 | 355 | 272 | 134 | 84 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 353 | 81 | 72 | 117 | 190 | 107 | 306 | 406 | 154 | 154 | 354 | 130 | 263 | 353 | 306 | 93 | 140 | 43 | 54 | 169 | 143 |
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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