Surf Forecasts:
Mewslade Bay surf forecast from 9 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 184 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-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Saturday (Aug 15) at 7PM.
| 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, Rusty here again. Let’s break it down for Mewslade Bay. It’s a bleak outlook, I won’t lie. We’ve got a proper dry spell before anything even worth looking at.
The water’s sitting at 68°F, which is a solid 6°F warmer than usual for this time of year. That’s a big anomaly, feels more like a warm bath than a Welsh summer.
We’re starting with nothing. From Sunday the 9th through the morning of Wednesday the 12th, it’s flat and messy. The first sign of life is Wednesday afternoon, the 12th. The wind will be light and clean out of the NW as a cross-off, but the swell is tiny at 2ft from the SW. The combined energy is only 96. It’s surfable, but only just.
Thursday morning the 13th is a touch better. Swell pushes up to 3ft from the WSW with a 10-second period, and energy hits 158. With light NNW cross-off winds, it’ll be the cleanest we’ve seen. Still, it’s a small, quiet session.
After that, it’s back to small and weak. There are a few clean windows with offshore winds, but the swell is just too small to do anything with.
Look ahead to Tuesday the 18th. The morning shows a 4ft WSW swell with energy at 167, but the wind is a light cross-shore. The afternoon gets bigger but turns messy with a cross-onshore breeze. A tease.
Wednesday the 19th afternoon sees the biggest swell of the forecast at 4ft from the WNW and energy at 143, but it’s onshore and choppy. A complete washout.
The only real window is Thursday the 20th. Both morning and afternoon show a 3ft W swell, clean conditions with light offshore and cross-off winds, and energy at 88. It’s small and ordinary, but it’s the best we’ve got. If you’re keen, that’s your session.
After that, it fades away. The last week is all below 2ft and not worth the walk.
So, the call: Mewslade is in a long quiet spell. The best chance for a small, clean wave is the morning of Thursday the 20th. Everything else is a scratch. Stay patient, and don’t sell the farm for it.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Tue afternoon, min 14°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Wed afternoon, min 16°C on Fri night). Winds increasing (light winds from the NW on Wed afternoon, fresh winds from the NNW by Sat morning). | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 6 | SW 4 | WSW 6 | 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 9 | WSW 8 | WSW 8 | W 8 | W 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 15 | 5 | 33 | 10 | 7 | 5 | 7 | 25 | 78 | 96 | 116 | 158 | 133 | 125 | 84 | 96 | 68 | 44 | 29 | 29 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-on | cross-off | cross | cross | cross | cross | cross-off | off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 4:38AM6.79m | 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 | ||||||||
Low Tide | 10:20PM1.94m | 10:54AM1.77m | 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 | |||||||
 |  |  | | | | | | | | | | |  | |  |  | | | | |
 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 6:01 | — | — |
 | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 17 | 19 | 20 | 18 | 22 | 25 | 23 | 25 | 29 | 26 | 27 | 29 | 21 | 23 | 23 | 18 | 18 | 18 | 15 |
Feels °C | 16 | 14 | 16 | 16 | 15 | 20 | 23 | 22 | 22 | 27 | 24 | 24 | 25 | 20 | 22 | 20 | 16 | 13 | 12 | 8 |
Swell 1 Height (m) Direction Period (s) | W 8 | SW 4 | WSW 6 | 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 | WSW 8 | WSW 8 | W 8 | W 8 |
| kJ | 1 | 5 | 33 | 10 | 7 | 4 | 7 | 25 | 78 | 96 | 116 | 158 | 133 | 125 | 84 | 96 | 68 | 44 | 29 | 29 |
Swell 2 Height (m) Direction Period (s) | SW 12 | SW 6 | WSW 7 | W 5 | WNW 5 | W 8 | SW 6 | W 9 | SW 6 | — | — | — | — | NNW 3 | — | — | W 11 | W 8 | — | NNW 4 |
| kJ | 6 | 1 | 5 | 5 | 2 | 5 | 2 | 6 | 1 | — | — | — | — | 1 | — | — | 2 | 1 | — | 3 |
Swell 3 Height (m) Direction Period (s) | — | W 8 | W 8 | W 8 | W 8 | W 10 | W 13 | SW 6 | W 5 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 1 | 1 | 1 | 1 | 2 | 3 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | WNW 4 | — | — | — | ESE 3 | ESE 3 | — | ESE 3 | E 3 | — | — | W 2 | W 4 | — | — | N 3 | N 3 | NW 4 | N 4 |
| kJ | 15 | 3 | — | — | — | 4 | 1 | — | 1 | 1 | — | — | 1 | 5 | — | — | 5 | 5 | 16 | 8 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 358 | 358 | 180 | 180 | 125 | 395 | 311 | 4 | 4 | 0 | 0 | 0 | 139 | 0 | 1 | 299 | 1 | 377 | 412 | 359 |
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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