Surf Forecasts:
Mewslade Bay surf forecast from 15 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10AM (local time) - 3.5ft (1.1m), 6s period, W swell with cross-offshore winds.
- Most powerful swell: Tuesday 18 Aug, 10AM (local time) - 4ft (1.2m), 6s period, W swell with 119 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10AM (local time) - 3.5ft (1.1m), 6s period with W swell.
Best Forecast Surf Conditions for Mewslade Bay this week:
The surf forecast for Mewslade Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 10AM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.1m and 15s. Another secondary swell of 0.1m and 15s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mewslade Bay in the next 16 days are 1.2m 6s and forecast to arrive on Tuesday (Aug 18) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Saturday (Aug 22) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 20th Aug) | 3.5ft (1.1m) 6s |
| Best Surf | 10AM (Thu 20th Aug) | 3.5ft (1.1m) 6s |
| Most Powerful | 10AM (Tue 18th Aug) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's be straight with each other – I've scanned the charts for the next couple of weeks and, well, it’s a lean stretch for Mewslade Bay. We're looking at a long gap of over a week before there’s anything I’d even paddle out for.
The first surfable session I see isn’t till Thursday, August 20th, and even then, it's just barely hanging in there. That morning, we get a bit of a bump from the west with waves around 4ft. The period is a short 6 seconds, so it’s a bit disorganised, but with a northwest cross-offshore breeze it’ll be clean. The combined energy is a modest 130, so there's a little bit of push there, but it’s still just "ordinary" conditions. No standouts here, but at least it’s a paddle.
Before that? Nothing. Zilch. We've got a run from Saturday the 15th right through to Wednesday the 19th of August where the swell is tiny – sometimes as small as 1ft to 3ft – with poor winds and chopped-out conditions. It's a proper blank run. If you’re jonesing for a fix, there’s simply nothing on offer.
Looking further ahead, the whole second week is pretty much the same story. From Friday the 21st all the way to the end of the forecast on the 30th, the swell barely kicks up past 2ft. Most mornings are clean, but the waves are just too small to get excited about. We get a few glassy moments, like on Sunday the 23rd afternoon and Wednesday the 26th morning, but it’s little 1ft dribbles. Not worth the wetsuit.
For Mewslade Bay, the water temp is sitting at a toasty 69°F, which is a full 7° warmer than normal for this time of year – that’s very unusual. The only saving grace is that the wind does swing offshore (NNE, N) on a handful of mornings, so when any swell does arrive, it could be clean. But for now, the surf quality is just poor. Honestly, for most of this period, the conditions look more setup for a paddleboard or a kite than a proper surfboard. Stay patient, lads.
- Rusty
Short Range ForecastMostly dry. Warm (max 21°C on Sat afternoon, min 14°C on Sat night). Winds decreasing (fresh winds from the NNW on Sat afternoon, calm by Sun morning). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Warm (max 20°C on Tue morning, min 14°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
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 | W 8 | W 8 | WSW 7 | WSW 7 | WSW 7 | W 5 | W 5 | WSW 7 | W 6 | W 6 | WSW 6 | W 6 | W 4 | W 6 | W 6 | WSW 6 | WSW 6 | WSW 6 | W 6 | W 8 |
Wave Graph | |||||||||||||||||||||
22 | 29 | 29 | 18 | 10 | 10 | 27 | 33 | 41 | 119 | 76 | 34 | 36 | 30 | 77 | 97 | 66 | 45 | 39 | 24 | 35 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | glassy | cross | cross | cross-off | cross-on | cross-on | cross | cross | cross | cross-on | cross-on | cross-on | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 9:02PM8.81m | 9:22AM8.35m | 9:40PM8.46m | 9:59AM7.98m | 10:17PM7.94m | 10:35AM7.48m | 10:54PM7.30m | 11:13AM6.91m | 11:35PM6.64m | 11:56AM6.32m | 00:23AM6.02m | 12:52PM5.80m | 1:31AM5.54m | ||||||||
Low Tide | 2:49PM0.14m | 3:12AM0.17m | 3:25PM0.37m | 3:48AM0.53m | 4:02PM0.76m | 4:23AM1.02m | 4:38PM1.28m | 4:59AM1.59m | 5:17PM1.85m | 5:39AM2.19m | 6:04PM2.43m | 6:31AM2.73m | 7:09PM2.91m | ||||||||
6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | |
— | 8:39 | — | — | 8:37 | — | — | 8:36 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | 1 |
Temp °C | 20 | 21 | 16 | 18 | 19 | 18 | 18 | 18 | 18 | 20 | 19 | 18 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 17 | 14 |
Feels °C | 17 | 15 | 11 | 14 | 15 | 18 | 16 | 14 | 16 | 17 | 15 | 14 | 13 | 11 | 12 | 14 | 13 | 14 | 12 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | W 8 | W 8 | WSW 7 | WSW 7 | WSW 7 | W 5 | SW 18 | — | W 6 | SW 17 | WSW 6 | W 6 | SW 16 | W 9 | SW 15 | WSW 9 | WSW 6 | WSW 6 | W 6 | W 8 |
22 | 29 | 29 | 18 | 10 | 10 | 27 | 12 | — | 119 | 11 | 34 | 36 | 10 | 15 | 8 | 25 | 45 | 39 | 24 | 35 | |
Swell 2 Height (m) Direction Period (s) | WSW 7 | — | NW 4 | NNW 3 | — | — | W 18 | W 18 | — | SW 16 | — | SW 17 | SW 16 | — | SW 16 | SW 15 | SW 14 | WSW 9 | WSW 9 | WSW 9 | SW 16 |
11 | — | 1 | 1 | — | — | 6 | 6 | — | 11 | — | 12 | 10 | — | 10 | 8 | 8 | 25 | 15 | 15 | 10 | |
Swell 3 Height (m) Direction Period (s) | W 10 | — | — | — | — | — | — | — | — | — | — | — | W 10 | — | SW 16 | W 15 | — | SW 14 | SW 13 | SW 13 | SW 13 |
2 | — | — | — | — | — | — | — | — | — | — | — | 2 | — | 10 | 4 | — | 8 | 7 | 7 | 7 | |
Wind waves Height (m) Direction Period (s) | NNW 3 | NW 3 | N 3 | — | — | WSW 4 | — | W 5 | WSW 7 | — | W 6 | — | — | W 4 | W 6 | W 6 | WSW 6 | — | — | NW 3 | NNW 3 |
4 | 5 | 6 | — | — | 6 | — | 33 | 41 | — | 76 | — | — | 30 | 77 | 97 | 66 | — | — | 3 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 377 | 277 | 274 | 408 | 405 | 395 | 358 | 322 | 408 | 695 | 412 | 181 | 358 | 322 | 378 | 0 | 322 | 0 | 19 | 214 | 4 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











