Surf Forecasts:
Mewslade Bay surf forecast from 1 Sep 2026:
- Best quality surf: Monday 7 Sep, 10PM (local time) - 4ft (1.2m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 1AM (local time) - 8ft (2.4m), 7s period, WSW swell with 594 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 7AM (local time) - 3ft (0.9m), 6s 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 Saturday (Sep 05) at 7AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.1m and 14s. 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 7s and forecast to arrive on Friday (Sep 04) 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 0.4m 3s period and expected on Monday (Sep 07) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 5th Sep) | 3ft (0.9m) 6s |
| Best Surf | 10PM (Mon 7th Sep) | 4ft (1.2m) 11s |
| Most Powerful | 1AM (Fri 4th Sep) | 8ft (2.4m) 7s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Right then, let's have a look at what Mewslade Bay has in store for us.
Straight up, for a spot that is exposed to the open ocean, the next week and a half is pretty bleak. We're looking at a long, drawn-out run of poor conditions. The wind is mostly on it or cross-on, the chop is nasty, and even when there's some energy in the water, the quality just isn't there. For the first ten days, from now until the 10th of September, there’s honestly nothing worth paddling out for. It’s a real shame.
The first glimmer of hope arrives on the morning of Friday the 11th of September. The wind goes glassy, dead calm, with a slight air. The swell is a solid 6 ft from the WSW with 8-second period, giving us 416 (moderate) energy. That clean, glassy surface will make it look a lot better than anything else we’ve seen. The afternoon picks up in size to 7 ft, but a light cross-onshore breeze will muss it up a bit, and the tide might be a factor. Crowds are possible here.
The Saturday morning, the 12th, offers a smaller, cleaner option with a cross-offshore breeze from the ENE, giving us a tidy 4 ft wave from the WSW with 207 (weak) energy. It’s not big, but it’ll be clean.
The real standout, the one you’ve been waiting for, looks like the morning of Tuesday the 15th of September. We’ve got a clean, offshore breeze from the NE, a clean swell of 3 ft, and a beautiful 12-second period from the WSW. That long-period groundswell will hold up nicely on the points around here, giving proper shape and energy. It’s small, but with 254 (moderate) energy and such clean conditions, that’s easily the best session in the entire 16-day window. Lock it in.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Tue morning. Very mild (max 18°C on Wed afternoon, min 16°C on Mon night). Winds increasing (light winds from the W on Mon night, fresh winds from the SSW by Wed morning). | Days 4-6 Weather SummarySome drizzle, heaviest during Thu night. Warm (max 20°C on Sun afternoon, min 13°C on Fri night). Winds decreasing (strong winds from the SW on Thu night, calm by Sat night). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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 | WSW 5 | WSW 5 | SW 5 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 8 | W 8 | W 7 | WSW 7 | WSW 9 | WSW 9 | WSW 9 | WSW 6 | WSW 8 | WSW 12 | W 11 | WSW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 137 | 54 | 44 | 80 | 383 | 286 | 249 | 294 | 594 | 295 | 258 | 126 | 58 | 80 | 46 | 26 | 12 | 22 | 240 | 279 | 260 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-on | on | cross-on | cross |
High Tide | 9:30AM8.21m | 9:48PM8.23m | 10:08AM7.90m | 10:28PM7.78m | 10:51AM7.44m | 11:16PM7.20m | 11:43AM6.88m | 00:16AM6.58m | 12:52PM6.37m | 1:38AM6.14m | 2:24PM6.19m | 3:16AM6.18m | 3:56PM6.54m | ||||||||
Low Tide | 3:28PM0.51m | 3:49AM0.66m | 4:06PM0.85m | 4:28AM1.10m | 4:49PM1.33m | 5:16AM1.67m | 5:45PM1.90m | 6:20AM2.24m | 7:06PM2.39m | 7:55AM2.58m | 8:54PM2.45m | 9:38AM2.39m | 10:25PM1.99m | ||||||||
 |  |  | |  |  | | | |  | |  |  | | | | | | | | | |
 | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — |
 | — | 8:04 | — | — | 8:01 | — | — | 8:00 | — | — | 7:58 | — | — | 7:54 | — | — | 7:52 | — | — | 7:51 | — |
mm | 1 | 2 | 2 | 1 | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 19 | 16 | 17 | 16 | 15 | 15 | 15 | 17 | 20 | 18 | 19 | 19 | 17 |
Feels °C | 14 | 13 | 14 | 12 | 14 | 15 | 16 | 15 | 14 | 12 | 12 | 11 | 13 | 12 | 15 | 13 | 16 | 15 | 17 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | — | SW 18 | W 8 | SW 16 | — | SW 15 | SW 15 | SW 16 | — | SW 14 | SW 14 | W 7 | WSW 7 | WSW 9 | WSW 9 | WSW 9 | WSW 6 | SW 5 | WSW 12 | W 11 | WSW 10 |
| kJ | — | 12 | 11 | 10 | — | 9 | 8 | 9 | — | 8 | 8 | 126 | 58 | 80 | 46 | 26 | 10 | 9 | 240 | 279 | 260 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 16 | — | — | W 15 | — | — | — | — | — | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | W 8 | WSW 8 | W 9 | — | — |
| kJ | — | — | 10 | — | — | 4 | — | — | — | — | — | 8 | 7 | 7 | 7 | 7 | 12 | 22 | 40 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | W 16 | — | — | — | — | — | — | — | — | SW 14 | — | — | — | — | SW 13 | SW 12 | — | — | — |
| kJ | — | — | 5 | — | — | — | — | — | — | — | — | 8 | — | — | — | — | 7 | 6 | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 9 | WSW 5 | WSW 5 | SW 5 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 8 | W 8 | — | — | — | — | SE 3 | SE 3 | SE 3 | — | WNW 3 | — |
| kJ | 137 | 54 | 44 | 80 | 383 | 286 | 249 | 294 | 594 | 295 | 258 | — | — | — | — | 2 | 2 | 1 | — | 9 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 114 | 139 | 114 | 404 | 322 | 322 | 124 | 322 | 141 | 358 | 358 | 134 | 18 | 124 | 4 | 64 | 48 | 4 | 31 | 31 | 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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