Surf Forecasts:
Mewslade Bay surf forecast from 11 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 4PM (local time) - 2.5ft (0.7m), 10s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 1PM (local time) - 3ft (0.9m), 10s period, WSW swell with 170 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 4PM (local time) - 2.5ft (0.7m), 10s 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 Wednesday (Aug 12) at 4PM. The primary swell is predicted to be 0.7m and 10s 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 0.9m 10s and forecast to arrive on Thursday (Aug 13) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Aug 15) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Wed 12th Aug) | 2.5ft (0.7m) 10s |
| Best Surf | 4PM (Wed 12th Aug) | 2.5ft (0.7m) 10s |
| Most Powerful | 1PM (Thu 13th Aug) | 3ft (0.9m) 10s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into what’s on offer at Mewslade Bay.
Right off the bat, I’ll be straight with ya: the next week and a half is pretty grim for a proper surf. There’s a long quiet spell from now until around Saturday the 22nd of August. We’ve got small, weak swell and messy winds for days, so you're better off doing a beach clean or tinkering with your gear.
Things finally get a pulse on Saturday the 22nd of August. The morning is the standout window, but it’s not for the faint of heart. We’re looking at a solid 8ft swell from the W, with a period of 11 seconds – that's proper groundswell energy. The combined energy is a massive 1655 (strong to very strong), so this is a powerful, deep water push. The wind is a clean cross-offshore from the NNW, buffering the face nicely. That said, 8ft at an exposed spot like Mewslade Bay is expert territory only. The crowds are sometimes around here, so on a Saturday with that size and quality, expect a few locals out. This is a big, raw setup.
The swell settles quickly by Sunday the 23rd of August morning. We’re down to 5ft, still from the W, with lighter NNW cross-off winds (6 mph) and waves that are much more manageable. The energy is 286 (moderate) so it’s still got a pulse, but is way more accessible for the strong intermediate crew. It won’t be the same beast as Saturday, but it’ll be cleaner and more user-friendly.
For the rest of the outlook, we drop back into small, weak junk. Monday the 24th has a long-period 14-second swell, but it’s only 2ft. That’s a tease – tons of period but no height to push it over the bar.
So to wrap it up: If you’re a charger with a big wave gun, the morning of Saturday the 22nd is your only true stand-out. If you want something a bit more relaxed but still fun, Sunday morning the 23rd is the call. The rest? Leave the board in the car.
Stay wet,
Rusty
Short Range ForecastMostly dry. Warm (max 31°C on Wed afternoon, min 16°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Thu afternoon, min 14°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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) | SW 6 | SW 7 | W 8 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 9 | W 6 | W 8 | WSW 7 | W 7 | W 8 | WSW 7 | WSW 7 | WSW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 10 | 7 | 5 | 7 | 42 | 78 | 96 | 119 | 146 | 163 | 123 | 135 | 50 | 33 | 73 | 70 | 29 | 11 | 10 | 10 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | off | cross-off | cross | cross-off |
High Tide | 5:10PM7.20m | 5:42AM7.35m | 6:08PM7.85m | 6:35AM7.89m | 6:57PM8.42m | 7:21AM8.31m | 7:41PM8.80m | 8:04AM8.54m | 8:23PM8.94m | 8:44AM8.55m | 9:02PM8.81m | 9:22AM8.35m | 9:40PM8.46m | |||||||
Low Tide | 11:30PM1.39m | 11:55AM1.22m | 00:26AM0.80m | 12:45PM0.69m | 1:13AM0.33m | 1:30PM0.31m | 1:56AM0.05m | 2:10PM0.12m | 2:35AM0.00m | 2:49PM0.14m | 3:12AM0.17m | 3:25PM0.37m | 3:48AM0.53m | |||||||
 |  | | | | | | | |  | |  | |  | | | | | | | |
 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 6:01 | — | — | 6:03 | — | — |
 | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — | — | 8:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 19 | 22 | 26 | 24 | 26 | 31 | 26 | 23 | 22 | 19 | 19 | 20 | 17 | 18 | 19 | 15 | 18 | 20 | 15 |
Feels °C | 17 | 16 | 20 | 24 | 23 | 22 | 29 | 24 | 20 | 19 | 19 | 19 | 17 | 14 | 15 | 16 | 11 | 15 | 16 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 7 | WSW 6 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 9 | W 9 | W 5 | WSW 7 | — | W 8 | W 5 | WSW 7 | W 4 |
| kJ | 10 | 7 | 4 | 7 | 42 | 78 | 96 | 119 | 146 | 163 | 123 | 135 | 39 | 21 | 73 | — | 29 | 8 | 10 | 3 |
Swell 2 Height (m) Direction Period (s) | W 5 | W 4 | W 8 | SW 6 | SW 6 | SW 6 | ESE 3 | W 3 | — | — | — | W 5 | — | W 8 | — | — | — | WSW 7 | W 7 | WSW 7 |
| kJ | 5 | 2 | 5 | 2 | 1 | 1 | 2 | 1 | — | — | — | 13 | — | 33 | — | — | — | 11 | 9 | 10 |
Swell 3 Height (m) Direction Period (s) | W 8 | W 8 | W 10 | W 13 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 1 | 2 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SE 3 | ESE 3 | — | E 2 | — | — | WNW 2 | — | — | W 5 | W 6 | — | NNW 3 | W 7 | NNW 3 | — | WSW 5 | — |
| kJ | — | — | 2 | 1 | — | 1 | — | — | 1 | — | — | 12 | 50 | — | 3 | 70 | 2 | — | 8 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 180 | 125 | 395 | 359 | 4 | 4 | 0 | 0 | 44 | 124 | 1 | 0 | 181 | 13 | 1 | 1 | 181 | 125 | 391 | 299 |
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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