Surf Forecasts:
Mewslade Bay surf forecast from 13 Sep 2026:
- Best quality surf: Sunday 20 Sep, 7AM (local time) - 4ft (1.2m), 7s period, WSW swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 4PM (local time) - 6.5ft (2.0m), 7s period, WSW swell with 415 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 7AM (local time) - 4ft (1.2m), 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 20) at 7AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.6m and 9s. Another secondary swell of 0.1m and 14s 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 2.0m 7s and forecast to arrive on Saturday (Sep 19) at 4PM. 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 4s period and expected on Wednesday (Sep 16) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 20th Sep) | 4ft (1.2m) 7s |
| Best Surf | 7AM (Sun 20th Sep) | 4ft (1.2m) 7s |
| Most Powerful | 4PM (Sat 19th Sep) | 6.5ft (2.0m) 7s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let’s have a look at Mewslade Bay for the next couple of weeks, and I’ll tell you right now – it’s about as dead as it gets. We are looking at a full 16-day blank with nothing on the table that’s worth your time.
The run starts on the 13th with a weak, choppy 1.5m swell and cross-onshore winds at 20 km/h. That sets the tone for the first week. It’s all poor surf, with the wind swinging around and keeping things lumpy. The combined energy is weak to moderate, maxing out around 367 on the 19th, but that’s with a fresh 30-35 km/h cross-shore wind that just tears it apart. That Saturday the 19th looks like the biggest swell – 2.0m – but with that wind, it’s a mess. With this being a beach break, I’d say that one’s more for the kite surfers than anyone with a paddle.
There’s a glimmer on the 16th and 17th when the wind goes cross-offshore and it cleans up, but the swell is only 1.3m to 1.7m with short periods, and the overall energy is nothing special. It’s just not consistent enough to call a session.
Then from the 22nd on, the swell just dies. We’re talking 0.5m, then 0.3m, then 0.1m for the rest of the period. The wind is offshore and clean, especially around the 23rd and 24th, but with that tiny amount of swell, it’s flat. The long-period stuff from the 25th to the 27th, up to 17 seconds, brings a bit of groundswell feel, but with waves of only 0.1m, it’s completely irrelevant.
Honestly, there’s nothing here. No standouts, no hidden gems. It’s a true blank run for the area, and that can happen. The forecasts can change, but as it stands, you’re better off finding something else to do. Keep the board in the shed.
Rusty out.
Short Range ForecastLight rain (total 9mm), mostly falling on Mon night. Very mild (max 19°C on Mon afternoon, min 13°C on Tue night). Winds increasing (light winds from the SW on Sun night, fresh winds from the SW by Mon night). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Fri night. Very mild (max 17°C on Fri night, min 13°C on Wed morning). Winds increasing (moderate winds from the NW on Wed morning, strong winds from the SW by Fri night). | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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 7 | WSW 10 | WSW 9 | WSW 9 | WSW 6 | WSW 6 | W 7 | W 7 | WSW 8 | W 10 | W 10 | W 10 | W 6 | W 7 | W 7 | W 7 | WSW 7 | WSW 6 | WSW 7 | WSW 7 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 195 | 351 | 232 | 227 | 68 | 154 | 270 | 255 | 246 | 313 | 296 | 204 | 243 | 225 | 298 | 225 | 157 | 330 | 360 | 415 | 259 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | cross | cross | cross-off | cross-off | cross | cross-on | cross-off | cross | cross-off | cross | cross-on | cross-on | cross | cross | cross-off |
High Tide | 8:33PM8.72m | 8:50AM8.41m | 9:07PM8.36m | 9:23AM8.05m | 9:41PM7.85m | 9:57AM7.56m | 10:15PM7.24m | 10:31AM6.98m | 10:52PM6.59m | 11:11AM6.37m | 11:36PM5.96m | 12:03PM5.79m | 00:42AM5.44m | ||||||||
Low Tide | 2:20PM0.12m | 2:39AM0.20m | 2:53PM0.34m | 3:10AM0.55m | 3:25PM0.72m | 3:41AM1.03m | 3:58PM1.23m | 4:14AM1.59m | 4:33PM1.81m | 4:50AM2.19m | 5:15PM2.43m | 5:38AM2.77m | 6:18PM2.98m | ||||||||
 |  |  |  |  | |  | |  | | |  | | |  | | | | | | | |
 | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — |
 | — | 7:37 | — | — | 7:35 | — | — | 7:32 | — | — | 7:30 | — | — | 7:28 | — | — | 7:25 | — | — | 7:22 | — |
mm | 3 | — | 1 | 1 | — | 4 | — | — | — | — | — | 1 | 1 | — | — | — | — | 4 | — | — | — |
Temp °C | 18 | 18 | 18 | 17 | 19 | 19 | 16 | 16 | 16 | 15 | 15 | 16 | 15 | 16 | 15 | 15 | 16 | 17 | 17 | 16 | 16 |
Feels °C | 17 | 17 | 17 | 16 | 17 | 16 | 11 | 10 | 12 | 10 | 9 | 10 | 9 | 10 | 8 | 11 | 11 | 11 | 12 | 10 | 12 |
Swell 1 Height (m) Direction Period (s) | W 10 | SW 13 | — | — | W 9 | WSW 9 | — | — | WSW 8 | W 10 | — | W 10 | — | — | W 17 | W 14 | W 15 | W 12 | W 11 | W 16 | — |
| kJ | 68 | 7 | — | — | 38 | 15 | — | — | 246 | 313 | — | 52 | — | — | 6 | 34 | 17 | 3 | 2 | 5 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | S 12 | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — |
| kJ | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 7 | WSW 10 | WSW 9 | WSW 9 | WSW 6 | WSW 6 | W 7 | W 7 | NW 4 | — | W 10 | W 10 | W 6 | W 7 | W 7 | W 7 | WSW 7 | WSW 6 | WSW 7 | WSW 7 | WSW 7 |
| kJ | 195 | 351 | 232 | 227 | 68 | 154 | 270 | 255 | 10 | — | 296 | 204 | 243 | 225 | 298 | 225 | 157 | 330 | 360 | 415 | 259 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 124 | 31 | 104 | 124 | 124 | 117 | 358 | 358 | 154 | 1 | 218 | 322 | 425 | 412 | 398 | 192 | 322 | 365 | 260 | 311 | 31 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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‘Porth Neigwl: Choppy waves hadn't tidied much (from what I could see in the dark.’
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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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