Surf Forecasts:
Mewslade Bay surf forecast from 7 Sep 2026:
- Best quality surf: Friday 11 Sep, 10PM (local time) - 3ft (0.9m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 1AM (local time) - 7ft (2.1m), 12s period, WSW swell with 1,205 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 10PM (local time) - 3ft (0.9m), 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 Friday (Sep 11) at 10PM. The primary swell is predicted to be 0.9m 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 2.1m 12s and forecast to arrive on Tuesday (Sep 08) at 1AM. 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) | 3ft (0.9m) 8s |
| Best Surf | 10PM (Fri 11th Sep) | 3ft (0.9m) 8s |
| Most Powerful | 1AM (Tue 8th Sep) | 7ft (2.1m) 12s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, let’s talk in feet and miles per hour now.
The next couple weeks are looking pretty lean around here. There's a long stretch with nothing worth paddling for. No standout days, nothing to get the heart rate up. From now up through to the 15th, it's all cross winds, chop, and short-period junk that just won't give you anything clean.
The only spot in the mix is Mewslade Bay. It's exposed to SW swell so it catches some energy, but the wind is a constant problem. Water temperature is about 66°F, which is nearly 5°F warmer than usual – that’s really noticeable, like stepping into a warm bath while staring at a flat, messy ocean.
Monday the 7th and Tuesday the 8th have some swell around 5 to 6 feet, but the wind is mostly cross to cross-on, blowing 12 to 15 mph. The combined energy numbers are high – in the 1350 and 1824 range – but that just means raw, messy power. The period is short, 13 to 14 seconds, and the wind adds plenty of chop. No thanks.
We’ve got a long gap where there’s nothing good. Almost every session scores a zero. The mornings of the 11th and 15th show cross-off winds with clean surface, but the swell is too weak and poorly shaped to bother.
Then, on Monday the 16th morning through to Wednesday the 16th afternoon, we finally get a little window. The afternoon of the 16th is glassy – wind drops to 3 mph from the east. Swell is tiny, around 2 feet, with a 10-second period from the west. Combined energy is low at 106 and 74 – that’s weak energy – but for once, the conditions are clean. It’s small, it’s ordinary, but it’s the best you’re going to get. For the guy itching to just get wet without battling wind, this is the highlight of the whole outlook.
After that, Thursday the 17th morning has a pulse of about 6 feet from the WSW at a short 7-second period. Wind is cross-off but moderate. Could be punchy but it’s rough around the edges. Sunday the 20th afternoon has a longer period swell of 11 to 12 seconds from the west with light wind – could line up a few, but it’s only 2 to 3 feet and the energy is moderate. A long shot.
If you’re picking one session, aim for Wednesday the 16th afternoon. Glassy, clean, small – that’s the one.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Mon night. Very mild (max 17°C on Mon morning, min 14°C on Mon night). Winds decreasing (fresh winds from the WNW on Tue afternoon, light winds from the W by Wed night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Sat afternoon. Very mild (max 17°C on Thu morning, min 12°C on Fri night). Winds increasing (calm on Fri night, strong winds from the SW by Sat night). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 14 | WSW 13 | WSW 12 | WSW 10 | W 9 | W 7 | WSW 8 | WSW 8 | WSW 8 | SW 8 | WSW 5 | WSW 7 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 5 | WSW 7 | WSW 7 | WSW 8 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 986 | 1060 | 1205 | 492 | 383 | 287 | 197 | 109 | 63 | 82 | 64 | 389 | 268 | 153 | 89 | 88 | 110 | 376 | 199 | 128 | 190 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-off | cross | cross-off | cross-off | cross-on | cross-on | on | cross-on | cross-on | cross-off | cross-off | cross-off | on | cross-on | cross-on | cross | cross | on |
High Tide | 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 | 8:16AM8.60m | 8:33PM8.72m | ||||||||
Low Tide | 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 | 2:20PM0.12m | 2:39AM0.20m | ||||||||
 |  |  |  | |  | |  | | | |  | | |  | |  | | | | | |
 | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:47 | — | — |
 | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:38 | — | — | 7:37 | — |
mm | — | — | 15 | 2 | — | — | — | — | — | — | — | 4 | — | — | — | — | 4 | 4 | — | — | — |
Temp °C | 17 | 17 | 16 | 15 | 16 | 15 | 15 | 15 | 16 | 17 | 17 | 17 | 17 | 17 | 14 | 15 | 16 | 17 | 17 | 16 | 17 |
Feels °C | 12 | 13 | 11 | 7 | 8 | 8 | 12 | 11 | 12 | 12 | 12 | 14 | 15 | 14 | 12 | 10 | 11 | 11 | 13 | 13 | 16 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | W 13 | — | WSW 10 | — | — | WSW 8 | WSW 8 | WSW 8 | W 12 | W 11 | W 7 | WSW 9 | WSW 8 | WSW 8 | W 16 | W 16 | — | WSW 7 | WSW 8 | — |
| kJ | 986 | 764 | — | 492 | — | — | 197 | 109 | 63 | 3 | 2 | 245 | 268 | 153 | 89 | 5 | 5 | — | 199 | 128 | — |
Swell 2 Height (m) Direction Period (s) | W 13 | — | — | — | — | — | — | — | W 13 | W 12 | — | — | — | — | — | W 16 | W 16 | — | W 13 | SW 13 | — |
| kJ | 366 | — | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | 5 | 5 | — | 3 | 7 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | WSW 13 | WSW 12 | — | W 9 | W 7 | — | W 6 | — | SW 8 | WSW 5 | WSW 7 | — | — | — | WSW 8 | WSW 5 | WSW 7 | — | — | WSW 9 |
| kJ | — | 1060 | 1205 | — | 383 | 287 | — | 31 | — | 82 | 64 | 389 | — | — | — | 88 | 110 | 376 | — | — | 190 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 135 | 124 | 1 | 902 | 154 | 1 | 168 | 32 | 172 | 378 | 139 | 1 | 18 | 0 | 46 | 124 | 260 | 299 | 358 | 6 |
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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