Surf Forecasts:
Mewslade Bay surf forecast from 28 Aug 2026:
- Most powerful swell: Monday 31 Aug, 7AM (local time) - 7ft (2.2m), 9s period, W swell with 836 kJ wave energy.
Best Forecast Surf Conditions for Mewslade Bay this week:
The most powerful waves expected at Mewslade Bay in the next 16 days are 2.2m 9s and forecast to arrive on Monday (Aug 31) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Saturday (Aug 29) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Mon 31st Aug) | 7ft (2.2m) 9s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s talk about what’s on the horizon for Mewslade Bay. I’ve had a look at the charts, and I’m not gonna sugarcoat it – this is a tough stretch. The good news? There’s a bit of a pulse of energy coming through, but the wind is going to be our biggest enemy for most of the window. The water is currently sitting at 68°F, which is a whopping 7°F warmer than usual for this time of year – that’s very unusual, like the ocean forgot it’s late summer.
We’re starting off with a rough hand. The first few days, from the 28th of August through the 4th of September, are a write-off. There’s some swell, around 3ft to 7ft, and the combined energy gets up into the moderate range (hitting 673 on the 31st), but it’s all blown out. Onshore and cross-onshore winds are howling at 15 to 22 mph, turning everything into a lumpy, choppy mess. The surf quality is poor, so you’re better off staying on the beach with a cold one.
The 5th of September sees a slight drop in wind, but the swell fades too, with weak energy (148) and onshore breezes returning. The 6th is more of the same. We’re looking at a solid week of junk.
Finally, on the morning of the 7th of September, we get a glimmer. The wind swings light from the WNW, making it a cross-shore breeze. The swell is 6ft from the SW with a period of 6 seconds, giving a combined energy of 224. It’s *marginal* – not great, but clean enough to get a few grovelly ones. The tide might be a factor, so keep an eye on that.
Then, the 8th of September is the big one. Swell size jumps to 16ft from the WSW with a very long period of 11 seconds – that’s a proper groundswell. The combined energy is a massive 5628, which is very strong energy. But here’s the catch: the wind is a fresh cross-shore from the WNW at 22 mph, which will make it incredibly lumpy and dangerous. This is only for experts, and only if they’re comfortable with a messy, powerful ocean. The long period means it’ll be walling up, and at a beach break like Mewslade, that can be a straight-up closeout. Honestly, this setup looks more interesting for a kite surfer than a paddle surfer.
The 9th of September settles back down to marginal conditions with a light wind, but the swell drops to 4ft. After that, from the 10th through the 12th, it’s back to poor, onshore slop.
So, the standout? If you’re desperate, the morning of the 7th of September is your best shot for a few clean, if small, waves. The 8th of September is a massive, powerful swell that demands respect and experience. Keep your expectations low, and maybe bring a camera – the ocean will be dramatic even if it’s not surfable.
Rusty.
Short Range ForecastHeavy rain (total 35mm), heaviest during Sun night. Very mild (max 18°C on Fri afternoon, min 15°C on Sun night). Winds increasing (light winds from the SSE on Sat morning, fresh winds from the SSW by Sun afternoon). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Wed morning. Very mild (max 18°C on Wed morning, min 16°C on Mon afternoon). Winds increasing (light winds from the W on Mon night, strong winds from the SSW by Wed morning). | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | SW 6 | SW 6 | SW 6 | SW 7 | WSW 10 | WSW 9 | SW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 10 | WSW 9 | WSW 6 | WSW 6 | WSW 6 | SW 6 | WSW 7 | WSW 7 | WSW 8 | WSW 8 |
Wave Graph | ||||||||||||||||||||
133 | 95 | 80 | 137 | 470 | 273 | 408 | 627 | 673 | 477 | 235 | 197 | 57 | 67 | 77 | 260 | 440 | 268 | 214 | 186 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross-on | on | on | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | cross-on | cross | cross |
High Tide | 7:31PM8.20m | 7:48AM8.10m | 8:03PM8.47m | 8:20AM8.30m | 8:36PM8.58m | 8:54AM8.35m | 9:11PM8.50m | 9:30AM8.21m | 9:48PM8.23m | 10:08AM7.90m | 10:28PM7.78m | 10:51AM7.44m | 11:16PM7.20m | |||||||
Low Tide | 1:41AM0.55m | 1:52PM0.48m | 2:11AM0.34m | 2:22PM0.33m | 2:42AM0.28m | 2:54PM0.34m | 3:14AM0.38m | 3:28PM0.51m | 3:49AM0.66m | 4:06PM0.85m | 4:28AM1.10m | 4:49PM1.33m | ||||||||
— | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | |
8:13 | — | — | 8:10 | — | — | 8:08 | — | — | 8:07 | — | — | 8:04 | — | — | 8:01 | — | — | 8:00 | — | |
mm | 1 | 7 | 9 | — | 2 | 3 | 5 | 8 | — | — | — | 1 | 1 | 2 | 3 | 1 | 1 | 1 | 1 | — |
Temp °C | 18 | 17 | 18 | 18 | 17 | 18 | 17 | 16 | 15 | 16 | 16 | 17 | 17 | 17 | 18 | 18 | 18 | 17 | 17 | 17 |
Feels °C | 15 | 14 | 14 | 16 | 14 | 14 | 11 | 13 | 11 | 12 | 14 | 14 | 13 | 14 | 11 | 13 | 13 | 11 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 6 | SW 7 | WSW 10 | WSW 9 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 10 | — | SW 18 | SW 16 | SW 16 | W 16 | SW 15 | SW 15 | SW 15 | SW 15 |
— | — | 80 | 137 | 470 | 273 | 227 | 422 | 673 | 477 | 235 | — | 12 | 10 | 10 | 5 | 9 | 8 | 9 | 9 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SSE 3 | — | — | — | — | — | — | — | — | W 18 | SW 16 | W 16 | — | — | — | — | SW 15 |
— | — | — | 1 | — | — | — | — | — | — | — | — | 6 | 10 | 5 | — | — | — | — | 9 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 6 | SE 4 | — | — | — | SW 8 | WSW 8 | — | — | — | WSW 9 | WSW 6 | WSW 6 | WSW 6 | SW 6 | WSW 7 | WSW 7 | WSW 8 | WSW 8 |
133 | 95 | 6 | — | — | — | 408 | 627 | — | — | — | 197 | 57 | 67 | 77 | 260 | 440 | 268 | 214 | 186 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 286 | 403 | 403 | 31 | 135 | 64 | 64 | 33 | 10 | 31 | 1 | 139 | 311 | 124 | 418 | 776 | 260 | 896 | 358 | 260 |
Best forecast wave conditions in Wales - Gower | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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Information about the Mewslade Bay Surf forecast
The above surf forecast table for Mewslade Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mewslade Bay can be found by selecting the local surf guide option on the grey menu. Our Mewslade Bay 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 (Mewslade Bay) 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 Mewslade Bay 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.
Mewslade Bay is 25 km (16 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.











