Surf Forecasts:
Mewslade Bay surf forecast from 8 Sep 2026:
- Best quality surf: Friday 11 Sep, 10PM (local time) - 3.5ft (1.0m), 8s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 10PM (local time) - 8ft (2.4m), 8s period, WSW swell with 698 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 10PM (local time) - 3.5ft (1.0m), 8s 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 Friday (Sep 11) at 10PM. The primary swell is predicted to be 1.0m 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 2.4m 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 0.6m 4s period and expected on Wednesday (Sep 09) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 11th Sep) | 3.5ft (1.0m) 8s |
| Best Surf | 10PM (Fri 11th Sep) | 3.5ft (1.0m) 8s |
| Most Powerful | 10PM (Thu 10th Sep) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s on the cards for Mewslade Bay over the next couple of weeks.
It’s a pretty quiet outlook, to be honest. There’s a bit of a pulse early on, but the surf is fighting against some nasty wind and the conditions just aren’t cooperating. The first real chance to get wet is on Tuesday, September 8th, but it’s a bit of a mixed bag.
Tuesday morning kicks things off with a 6ft swell from the WSW, with a period of 9 seconds. The wind is a moderate cross-off, so the surf will be clean, but the combined energy is a moderate 528. The water is a warm 66°F, which is much warmer than usual for this time of year. That’s nice, but the forecast is pointing to a marginal session, likely a tricky tide. The afternoon gets rougher with a cross-shore wind picking up, making it choppy and messy.
Wednesday the 9th drops off a bit, with a smaller 4ft swell in the morning and clean conditions, but the energy is much weaker at 167. It’s surfable but nothing to write home about. The rest of the week and into the weekend is a write-off for decent surf. We’ve got a long stretch from Thursday the 10th all the way through to Sunday the 20th where the conditions are poor, the swell is either too small, too short period, or the wind is just wrong. There’s a few days of glassy or clean conditions in there, like Thursday the 17th and Friday the 18th, but the swell is only 1ft – barely a ripple.
The best bet, and the only real standout in this whole 16-day window, is Tuesday morning, September 8th. Yes, the tide might be a factor, but that 6ft swell from the WSW with a clean cross-off wind is as good as it gets. The water is beautifully warm, too. After that, it’s a long wait.
For the experienced crew, the 6ft swell is a decent size, but it’s not too big. For beginners, it’s on the upper edge of what’s comfortable. High tide and a long period like this won’t be the best for a beach break, but this is a reef and bay set-up, so it should wrap in nicely.
So, in short, get out Tuesday morning if you can, because after that, it’s a long, flat, and choppy run until the 20th, and even then it’s only tiny waves. The forecasts can change, but for now, it’s a pretty quiet spell.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu morning, min 14°C on Tue morning). Winds increasing (light winds from the WSW on Wed night, strong winds from the SSW by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Sat night. Very mild (max 18°C on Sun morning, min 13°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the SW by Sat night). | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 9 | W 9 | W 7 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | SW 6 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | WSW 5 | WSW 7 | WSW 7 | WSW 7 | WSW 9 | WSW 9 | WSW 8 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 528 | 431 | 232 | 167 | 109 | 71 | 23 | 143 | 675 | 268 | 202 | 119 | 68 | 97 | 349 | 252 | 151 | 106 | 80 | 82 | 70 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross-on | on | on | on | cross | cross-off | cross-off | off | on | on | cross-on | cross-on | cross-on | cross-on | on | on | on |
High Tide | 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 | 8:16AM8.60m | 8:33PM8.72m | 8:50AM8.41m | 9:07PM8.36m | ||||||||
Low Tide | 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 | 2:20PM0.12m | 2:39AM0.20m | 2:53PM0.34m | 3:10AM0.55m | |||||||
 |  |  | | | | |  |  | | |  | |  |  | | | | | | | |
 | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — |
 | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:38 | — | — | 7:37 | — | — | 7:35 | — |
mm | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 6 | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 15 | 15 | 16 | 17 | 17 | 17 | 15 | 16 | 14 | 15 | 16 | 17 | 18 | 17 | 17 | 17 | 18 | 18 |
Feels °C | 8 | 9 | 9 | 11 | 11 | 12 | 11 | 11 | 14 | 11 | 12 | 11 | 10 | 11 | 12 | 16 | 15 | 17 | 17 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | — | — | WSW 8 | WSW 8 | WSW 8 | WSW 8 | W 11 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | — | — | WSW 7 | WSW 9 | WSW 9 | — | WSW 8 |
| kJ | 528 | — | — | 167 | 109 | 71 | 19 | 2 | 675 | 268 | 202 | 119 | 68 | 24 | — | — | 151 | 106 | 80 | — | 70 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | W 13 | W 12 | W 11 | — | — | — | — | — | — | — | — | SW 13 | — | — | — | — |
| kJ | — | — | — | — | — | 3 | 3 | 2 | — | — | — | — | — | — | — | — | 7 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | W 9 | W 7 | NNW 3 | W 6 | — | SW 4 | SW 6 | — | NNW 3 | — | — | SW 2 | WSW 5 | WSW 7 | WSW 7 | — | — | — | WSW 8 | — |
| kJ | — | 431 | 232 | 4 | 31 | — | 23 | 143 | — | 3 | — | — | 2 | 97 | 349 | 252 | — | — | — | 82 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 896 | 154 | 1 | 124 | 46 | 311 | 260 | 10 | 1 | 1 | 0 | 46 | 358 | 260 | 141 | 365 | 104 | 6 | 172 | 95 |
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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