Surf Forecasts:
Mewslade Bay surf forecast from 9 Sep 2026:
- Best quality surf: Sunday 13 Sep, 7AM (local time) - 3.5ft (1.1m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 10PM (local time) - 7ft (2.2m), 8s period, WSW swell with 627 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 7AM (local time) - 3.5ft (1.1m), 8s 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 7AM. The primary swell is predicted to be 1.1m and 8s period. 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 2.2m 8s and forecast to arrive on Thursday (Sep 10) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Wednesday (Sep 09) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 13th Sep) | 3.5ft (1.1m) 8s |
| Best Surf | 7AM (Sun 13th Sep) | 3.5ft (1.1m) 8s |
| Most Powerful | 10PM (Thu 10th Sep) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Right then, I’ve been staring at the charts for Mewslade Bay, and I’ve got to be straight with you—it’s a rough stretch ahead. The 16-day window is looking pretty bleak, with a whole lot of flat spells and messy, blown-out slop. Don’t get your hopes up just yet.
We kick off Wednesday the 9th with a weak, 4ft swell from the W, but it’s a short-period 8 seconds and the wind is all over it. The energy is a paltry 190, and it’s just poor conditions. That’s a theme for the whole first week. Thursday the 10th gets a bit of a bump in size, up to 6ft by the afternoon from the SW, but it’s a windswell with a 6-second period and onshore winds are howling at 22 mph. The wave energy jumps to 255, but it’s a total mess. Friday the 11th morning offers a cleaner window with a 5ft WSW swell at 9 seconds and cross-offshore NW winds at 9 mph. The energy is moderate at 294, and the sea state is clean. It’s a brief, marginal respite, but the surf is still pretty ordinary. The weekend is a write-off, with strong onshore winds and messy, lumpy conditions.
The worst of it is the gap from the 12th right through to the 22nd of September. There’s a massive stretch of days with no decent surf. The 13th of September morning has a clean 3ft WSW swell, but it’s just not enough to get excited about. The water temperature is about average for the time of year, nothing unusual.
The standout, if you can call it that, is far out on the horizon. Keep an eye on Wednesday the 23rd of September. That afternoon, Mewslade Bay should see a 4ft swell from the W, with a 6-second period. The wind will be light easterly, cross-offshore, and the energy will be a solid 205. The forecast says “expect good surf conditions,” which is the best we’ve seen all period. It’s still a week away though, so treat it as promising but not a guarantee.
After that, Thursday the 24th of September morning looks clean again with a 3ft W swell, but the energy drops away sharply. The rest of the window just fades into small, weak dribble.
Honestly, this is a tough one. Mewslade Bay is a fairly consistent spot, so a blank run like this is a bit unusual, but it happens. Forecasts can change, and the late September window might firm up. For now, you’re better off looking at the tide pools or a long walk.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu afternoon. Very mild (max 18°C on Thu night, min 13°C on Tue night). Winds increasing (light winds from the W on Wed night, fresh winds from the SW by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat morning. Warm (max 21°C on Mon afternoon, min 13°C on Sat night). Winds decreasing (strong winds from the SW on Sat morning, calm by Sun night). | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | W 8 | WSW 8 | WSW 8 | WSW 8 | SW 6 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | WSW 6 | WSW 7 | WSW 7 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 5 | WSW 6 | WSW 6 | WSW 8 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 190 | 116 | 49 | 27 | 253 | 619 | 294 | 213 | 128 | 309 | 456 | 228 | 169 | 143 | 82 | 84 | 47 | 47 | 41 | 52 | 113 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | on | on | on | cross | cross-off | cross-on | on | on | cross-on | cross-off | cross-off | cross-on | glassy | on | cross-on | cross-on | cross-on | cross-on | cross-off |
High Tide | 5:34AM7.31m | 5:56PM7.89m | 6:21AM7.90m | 6:40PM8.44m | 7:02AM8.34m | 7:20PM8.77m | 7:40AM8.58m | 7:57PM8.86m | 8:16AM8.60m | 8:33PM8.72m | 8:50AM8.41m | 9:07PM8.36m | 9:23AM8.05m | 9:41PM7.85m | |||||||
Low Tide | 11:47AM1.20m | 00:15AM0.74m | 12:31PM0.65m | 00:56AM0.29m | 1:10PM0.27m | 1:33AM0.05m | 1:46PM0.09m | 2:07AM0.02m | 2:20PM0.12m | 2:39AM0.20m | 2:53PM0.34m | 3:10AM0.55m | 3:25PM0.72m | 3:41AM1.03m | |||||||
 |  |  |  |  | | | | | | | | | |  | | | | | | | |
 | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — |
 | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:38 | — | — | 7:37 | — | — | 7:35 | — | — | 7:32 | — |
mm | — | — | — | — | 2 | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 16 | 17 | 17 | 18 | 16 | 17 | 17 | 17 | 18 | 17 | 15 | 15 | 16 | 19 | 21 | 19 | 19 | 20 | 20 |
Feels °C | 10 | 11 | 12 | 11 | 11 | 16 | 14 | 14 | 13 | 12 | 13 | 15 | 13 | 12 | 16 | 18 | 21 | 20 | 19 | 21 | 20 |
Swell 1 Height (m) Direction Period (s) | W 8 | WSW 8 | WSW 8 | WSW 8 | W 11 | W 9 | WSW 9 | WSW 9 | WSW 8 | W 16 | — | WSW 7 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | WSW 6 | WSW 6 | WSW 8 | WSW 10 |
| kJ | 190 | 116 | 49 | 22 | 2 | 565 | 294 | 213 | 128 | 5 | — | 228 | 169 | 143 | 82 | 84 | 24 | 47 | 41 | 52 | 33 |
Swell 2 Height (m) Direction Period (s) | — | — | W 13 | W 12 | — | — | — | — | — | — | — | — | — | SW 13 | — | — | S 12 | WSW 8 | W 11 | W 11 | — |
| kJ | — | — | 3 | 3 | — | — | — | — | — | — | — | — | — | 7 | — | — | 3 | 14 | 2 | 9 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 11 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — |
Wind waves Height (m) Direction Period (s) | — | W 6 | — | SW 4 | SW 6 | WSW 9 | — | — | — | WSW 6 | WSW 7 | — | N 3 | — | — | — | WSW 5 | — | — | SSE 3 | SW 6 |
| kJ | — | 31 | — | 27 | 253 | 619 | — | — | — | 309 | 456 | — | 1 | — | — | — | 47 | — | — | 1 | 113 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 1 | 32 | 405 | 297 | 33 | 1 | 44 | 46 | 365 | 384 | 31 | 0 | 76 | 0 | 38 | 124 | 95 | 95 | 107 | 0 |
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.
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