Surf Forecasts:
Mewslade Bay surf forecast from 6 Sep 2026:
- Best quality surf: Sunday 13 Sep, 1PM (local time) - 3ft (0.9m), 7s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 10PM (local time) - 6ft (1.9m), 12s period, WSW swell with 1,018 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 1PM (local time) - 3ft (0.9m), 7s period with WSW 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 Sunday (Sep 13) at 1PM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.2m and 9s. Another secondary swell of 0.1m and 13s 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 1.9m 12s and forecast to arrive on Monday (Sep 07) at 10PM. 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+) | 1PM (Sun 13th Sep) | 3ft (0.9m) 7s |
| Best Surf | 1PM (Sun 13th Sep) | 3ft (0.9m) 7s |
| Most Powerful | 10PM (Mon 7th Sep) | 6ft (1.9m) 12s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, Rusty here again. Let's break down Mewslade Bay over the next 16 days.
Honestly, it's looking like a rough stretch with a big gap of nothing worth paddling out for. The water temp is about 66°, which is much warmer than normal for this time of year – nearly 5° above average. That’s about the only nice thing I can say.
The first few days are all blown out. Sunday the 6th has tiny 3ft swell with a poor 6-second period and onshore wind. Monday the 7th through the 8th sees bigger swell, 5 to 6ft, but the wind is side or side-on, making everything lumpy and chopped up. The combined wave energy on Monday morning is massive, but it’s not doing us any favors. That pattern just keeps on giving – swell shows up, wind ruins it.
There’s a tiny window on Wednesday morning the 9th with cleaner conditions and a 5ft swell, but it's only a short look and the tide may not play ball. Friday the 11th morning is similar – clean, offshore-ish wind with a 5ft swell, but still a marginal call.
The only day that really has my attention is way out there on Tuesday, the 16th of September. This is a long way off, so keep that in mind, but the data is screaming. We’re looking at a solid 10ft swell out of the west-southwest. That’s big. Expert-only territory. Beginners and intermediates, stay on the beach. The wind is forecast to be light and offshore, which would give us clean conditions. The combined swell energy is enormous. However, the forecast warns that the swell is predicted to be too big for this break, so it’s going to be a heavy, gnarly mess. If you’re a seasoned charger and the wind holds, you might score. For the rest of us, it’s a spectator day.
After that, it’s back to strong onshores and messy surf on the 17th and 18th, followed by tiny, weak waves fading out to the end of the period.
So there you go: one potential big-wave day for the hardcore crew on the 16th, and a whole lot of waiting before and after. Hope the long-range forecast is right.
Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Mon night. Warm (max 21°C on Sun afternoon, min 14°C on Mon night). Winds increasing (light winds from the SSW on Sun afternoon, strong winds from the WNW by Tue afternoon). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Very mild (max 17°C on Thu afternoon, min 14°C on Wed afternoon). Winds increasing (light winds from the WNW on Fri night, strong winds from the SW by Sat morning). | |||||||||||||||||||
Sun 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
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 6 | WSW 7 | WSW 14 | W 13 | WSW 7 | WSW 8 | W 8 | W 7 | W 8 | W 6 | WSW 8 | WSW 6 | WSW 7 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | SW 5 | WSW 6 | WSW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 62 | 93 | 986 | 972 | 554 | 471 | 439 | 377 | 280 | 51 | 85 | 114 | 415 | 528 | 326 | 197 | 94 | 89 | 216 | 149 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-on | cross-on | on | on | cross-on | cross-off | cross | cross-on | on | cross-on | cross |
High Tide | 3:16AM6.18m | 3:56PM6.54m | 4:36AM6.67m | 5:04PM7.20m | 5:34AM7.31m | 5:56PM7.89m | 6:21AM7.90m | 6:40PM8.44m | 7:02AM8.34m | 7:20PM8.77m | 7:40AM8.58m | 7:57PM8.86m | ||||||||
Low Tide | 8:54PM2.45m | 9:38AM2.39m | 10:25PM1.99m | 10:53AM1.83m | 11:27PM1.35m | 11:47AM1.20m | 00:15AM0.74m | 12:31PM0.65m | 00:56AM0.29m | 1:10PM0.27m | 1:33AM0.05m | 1:46PM0.09m | 2:07AM0.02m | |||||||
 |  | | |  |  | | |  | |  |  | |  | | |  | | | | |
 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — |
 | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:38 | — |
mm | — | — | — | — | 8 | — | — | — | — | — | 1 | 1 | — | 1 | — | — | — | — | 2 | — |
Temp °C | 21 | 18 | 17 | 17 | 16 | 15 | 16 | 15 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 17 | 16 | 17 | 18 | 17 |
Feels °C | 19 | 17 | 13 | 13 | 10 | 9 | 8 | 7 | 12 | 11 | 11 | 10 | 12 | 14 | 15 | 14 | 12 | 11 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 13 | WSW 16 | WSW 14 | W 13 | — | WSW 11 | — | — | W 8 | WSW 8 | W 13 | W 12 | W 11 | W 9 | WSW 9 | WSW 9 | WSW 8 | W 8 | W 17 | WSW 7 |
| kJ | 6 | 53 | 986 | 972 | — | 88 | — | — | 217 | 51 | 3 | 3 | 10 | 380 | 326 | 197 | 94 | 32 | 6 | 149 |
Swell 2 Height (m) Direction Period (s) | SW 13 | SW 12 | W 13 | — | — | — | — | — | — | — | W 13 | W 12 | — | — | — | — | — | W 15 | — | W 16 |
| kJ | 6 | 6 | 366 | — | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | 5 | — | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | WSW 7 | — | — | WSW 7 | WSW 8 | W 8 | W 7 | W 8 | W 6 | WSW 8 | WSW 6 | WSW 7 | WSW 9 | — | — | — | SW 5 | WSW 6 | — |
| kJ | 62 | 93 | — | — | 554 | 471 | 439 | 377 | 280 | 49 | 85 | 114 | 415 | 528 | — | — | — | 89 | 216 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 172 | 114 | 10 | 135 | 124 | 154 | 419 | 358 | 10 | 141 | 95 | 405 | 311 | 135 | 1 | 31 | 13 | 365 | 322 | 135 |
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.
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