Surf Forecasts:
Mewslade Bay surf forecast from 13 Aug 2026:
- Best quality surf: Thursday 13 Aug, 10AM (local time) - 3ft (0.9m), 10s period, WSW swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 7AM (local time) - 5ft (1.5m), 7s period, W swell with 196 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 10AM (local time) - 3ft (0.9m), 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 Thursday (Aug 13) at 10AM. The primary swell is predicted to be 0.9m and 10s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Mewslade Bay in the next 16 days are 1.5m 7s and forecast to arrive on Tuesday (Aug 18) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 15) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 13th Aug) | 3ft (0.9m) 10s |
| Best Surf | 10AM (Thu 13th Aug) | 3ft (0.9m) 10s |
| Most Powerful | 7AM (Tue 18th Aug) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the next couple of weeks at Mewslade Bay.
Honestly, the surf story for Mewslade Bay over the next 16 days is a real test of patience. There’s a long stretch of pretty grim conditions to wade through before we get a brief glimpse of something half decent. The first recommendation isn’t until Thursday morning, August 13th, and even then it barely qualifies.
Thursday, August 13th. We’ve got some small waist-high swell coming in at 3ft from the WSW, but the period is a short and weak 10 seconds. The energy is weak (184). The saving grace is it’s glassy early with a slight SSE air, which could make for some fun little rollers if you’re desperate for a paddle. The water temp is about average for this time of year. But don't blink, because by Thursday afternoon a strong 16 mph cross-on wind from the W will turn it into a chop-fest.
From there, it’s a real bleak run. Friday the 14th and Saturday the 15th are a write-off with tiny, wind-affected dribble. Sunday the 16th through Tuesday the 18th sees the swell drop to knee-high or less, plagued by onshore breezes. That’s a solid stretch of poor surfing.
The one true standout in the whole window arrives a week from now on Wednesday, August 19th. The swell bumps up significantly to a solid 8ft from the WSW. The wave energy jumps to strong (759 in the morning, 899 in the afternoon). The period is still short at 8 seconds though, so it’ll be a bit of a lumpy beast. The key here is the wind: a clean, cross-off breeze from the NW keeps the face tidy. This is big for Mewslade Bay, and at that size (over 6ft), it’s firmly in the expert category. The conditions are clean but this is a powerful, chunky wave and not for the faint of heart. It’s the best on offer, by a mile, but you gotta be on your game.
Thursday the 20th drops back to a more manageable 5ft but stays clean with a cross-off wind. It’s still worth a look if you missed the main event. After that, the swell fades away into nothing once again for the second week, with more onshore winds and tiny waves returning. The end of the outlook (from August 24th onwards) is just dismal with strong onshore winds and barely a ripple.
So in short: hold out for Wednesday the 19th if you’ve got the skill and the nerve. The rest of the time, you’re better off waiting for the next storm to pass.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Thu morning, min 13°C on Sat night). Winds increasing (calm on Thu morning, fresh winds from the N by Fri night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Sun afternoon, min 15°C on Sun morning). Winds increasing (calm on Mon morning, fresh winds from the W by Tue night). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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 10 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | W 7 | W 8 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 4 | W 7 | WSW 7 | W 7 | W 6 | W 6 | W 7 |
Wave Graph | |||||||||||||||||||||
184 | 173 | 125 | 84 | 61 | 50 | 21 | 40 | 29 | 11 | 10 | 10 | 9 | 12 | 30 | 176 | 135 | 126 | 74 | 39 | 23 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | cross-off | glassy | cross-on | cross-on | cross | cross-on | cross | cross-off | cross | off |
High Tide | 7:41PM8.80m | 8:04AM8.54m | 8:23PM8.94m | 8:44AM8.55m | 9:02PM8.81m | 9:22AM8.35m | 9:40PM8.46m | 9:59AM7.98m | 10:17PM7.94m | 10:35AM7.48m | 10:54PM7.30m | 11:13AM6.91m | 11:35PM6.64m | ||||||||
Low Tide | 1:30PM0.31m | 1:56AM0.05m | 2:10PM0.12m | 2:35AM0.00m | 2:49PM0.14m | 3:12AM0.17m | 3:25PM0.37m | 3:48AM0.53m | 4:02PM0.76m | 4:23AM1.02m | 4:38PM1.28m | 4:59AM1.59m | 5:17PM1.85m | ||||||||
5:58 | — | — | 5:58 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | |
— | 8:44 | — | — | 8:42 | — | — | 8:39 | — | — | 8:37 | — | — | 8:36 | — | — | 8:34 | — | — | 8:31 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 20 | 20 | 21 | 18 | 19 | 19 | 15 | 17 | 19 | 16 | 18 | 18 | 18 | 19 | 19 | 18 | 17 | 19 | 18 |
Feels °C | 20 | 21 | 20 | 20 | 19 | 16 | 14 | 13 | 10 | 14 | 14 | 12 | 17 | 17 | 16 | 17 | 17 | 14 | 14 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | W 7 | W 8 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 8 | W 17 | SW 16 | SW 17 | SW 17 | W 6 | W 6 | W 7 |
184 | 173 | 125 | 84 | 61 | 50 | 21 | 40 | 29 | 11 | 10 | 10 | 9 | 1 | 5 | 11 | 11 | 12 | 74 | 39 | 23 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | W 11 | WSW 7 | — | NW 4 | — | — | W 5 | — | SW 18 | — | — | — | W 17 | SW 16 | W 10 | W 8 |
— | — | — | — | — | 2 | 10 | — | 1 | — | — | 2 | — | 12 | — | — | — | 6 | 10 | 2 | 6 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 10 | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 | SW 16 |
— | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | 10 | 10 | |
Wind waves Height (m) Direction Period (s) | — | WSW 2 | W 3 | — | — | NNW 3 | NNW 4 | NW 4 | N 4 | — | NW 2 | N 4 | — | WSW 7 | WSW 4 | W 7 | WSW 7 | W 7 | — | — | — |
— | 1 | 2 | — | — | 3 | 17 | 14 | 10 | — | 1 | 6 | — | 9 | 30 | 176 | 135 | 126 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 358 | 0 | 1 | 358 | 181 | 377 | 603 | 274 | 396 | 404 | 418 | 288 | 437 | 378 | 138 | 405 | 299 | 181 | 181 | 43 |
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.











