
Surf Forecasts:
Mewslade Bay surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 4AM (local time) - 10ft (3.0m), 8s period, W swell with offshore winds.
- Most powerful swell: Wednesday 16 Sep, 7AM (local time) - 10ft (3.0m), 9s period, W swell with 1,201 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 7AM (local time) - 5ft (1.5m), 9s 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 Friday (Sep 11) at 7AM. The primary swell is predicted to be 1.5m and 9s 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 3.0m 9s and forecast to arrive on Wednesday (Sep 16) at 7AM. Winds are predicted to be offshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 11th Sep) | 5ft (1.5m) 9s |
| Best Surf | 4AM (Wed 16th Sep) | 10ft (3.0m) 8s |
| Most Powerful | 7AM (Wed 16th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Right, gather 'round. Rusty here, and I've been staring at the charts for Mewslade Bay. Bit of a mixed bag coming our way, so let's break it down.
Right off the bat, things are looking pretty grim. We’ve got a long flat spell stretching from now all the way through to the end of the week. Not a single surfable wave in the forecast for the next several days. The water is a balmy 66°, which is a good 5° warmer than normal for this time of year – that's very unusual, almost feels like summer hasn't let go.
The first real sign of life shows up on Friday the 11th. It's not huge, but the morning session at Mewslade Bay has some promise. We're looking at a 4ft swell from the WSW, with a 9-second period giving it a bit of shape. The real winner is that NW wind – a clean 9 mph cross-offshore breeze that should keep the faces nice and smooth. Combined energy is moderate at 271. It's a solid "get out of bed early" kind of morning, just the one standout in a pretty barren week.
After that, the wind turns onshore and messy again for the weekend. Saturday the 12th is a complete write-off with a strong, lumpy cross-onshore wind. Sunday the 13th morning is worth a look, though. The swell drops a touch to 4ft from the WSW, but the period stretches to 10 seconds, which is a nice groundswell pulse. The wind goes light WNW at 6 mph, cross-off again, so the waves will be clean and lined up. The energy is moderate to strong at 335.
The rest of the run is pretty average. There’s a notable pulse of bigger swell on Wednesday the 16th – an 8ft W swell at 9 seconds, with a huge energy reading of 951. That's a lot of water moving, and it'll be powerful. The wind is a strong cross-off from the N at 22 mph, which will keep it clean, but 8ft is expert territory, and that shorter period means it'll be a bit of a washing machine. The morning is the best bet for the brave. That same day also has some big numbers in the afternoon.
After that, it’s back to small, weak waves for the final week of the outlook, with nothing really worth paddling out for. There’s a tiny glassy 1ft swell on Friday the 18th, but that's barely a ripple. It's a long dry spell, so don't hold your breath. Mewslade Bay is an exposed spot, but the conditions just aren't aligning.
So, to sum it up: If you're looking for the best of a quiet period, set your alarm for Friday morning the 11th or Sunday morning the 13th. Those are your cleanest, most surfable windows. The big Wednesday the 16th is for experienced chargers only. Otherwise, it's a waiting game.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu afternoon. Very mild (max 18°C on Thu night, min 14°C on Wed morning). Winds increasing (light winds from the WSW on Wed night, fresh winds from the SSW by Thu afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Mon morning. Very mild (max 19°C on Mon afternoon, min 16°C on Sat night). Winds decreasing (fresh winds from the SW on Sat morning, light winds from the WNW by Sun morning). | ||||||||||||||||||||
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 | WSW 6 | W 9 | WSW 9 | WSW 9 | WSW 8 | WSW 6 | WSW 7 | WSW 7 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 9 | W 9 | WSW 8 | SW 6 | WSW 8 |
Wave Graph | |||||||||||||||||||||
190 | 116 | 49 | 29 | 277 | 495 | 271 | 180 | 96 | 139 | 311 | 254 | 335 | 201 | 113 | 86 | 40 | 38 | 83 | 68 | 804 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | on | on | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-on | on | cross-on | cross-on | on | cross | glassy | cross-off |
High Tide | 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 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 4 | 19 |
Temp °C | 15 | 15 | 15 | 16 | 17 | 18 | 16 | 16 | 17 | 17 | 18 | 17 | 17 | 16 | 18 | 18 | 19 | 18 | 21 | 23 | 19 |
Feels °C | 11 | 12 | 11 | 10 | 11 | 15 | 15 | 13 | 13 | 13 | 14 | 14 | 16 | 15 | 19 | 17 | 18 | 17 | 21 | 25 | 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 8 | — | W 10 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 9 | WSW 5 | WSW 8 | W 11 | — |
190 | 116 | 49 | 22 | 2 | 495 | 271 | 180 | 96 | 46 | — | 52 | 335 | 201 | 113 | 86 | 40 | 26 | 83 | 9 | — | |
Swell 2 Height (m) Direction Period (s) | — | W 8 | W 13 | W 12 | — | — | — | — | — | W 15 | — | — | — | SW 13 | — | — | S 12 | W 9 | W 11 | W 11 | — |
— | 49 | 3 | 3 | — | — | — | — | — | 4 | — | — | — | 7 | — | — | 3 | 38 | 2 | 20 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | SW 4 | WSW 6 | — | — | — | — | WSW 6 | WSW 7 | WSW 7 | — | — | — | SW 3 | SW 5 | — | SE 2 | SW 6 | WSW 8 |
— | — | — | 29 | 277 | — | — | — | — | 139 | 311 | 254 | — | — | — | 3 | 22 | — | 1 | 68 | 804 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 1 | 13 | 241 | 297 | 33 | 0 | 44 | 95 | 124 | 319 | 135 | 0 | 31 | 6 | 114 | 172 | 46 | 2 | 0 | 0 |
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.










