Surf Forecasts:
Mewslade Bay surf forecast from 19 Aug 2026:
- Best quality surf: Friday 21 Aug, 1AM (local time) - 2.5ft (0.8m), 9s period, WSW swell with offshore winds.
- Most powerful swell: Wednesday 26 Aug, 1AM (local time) - 5ft (1.6m), 9s period, WSW swell with 404 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 1AM (local time) - 2.5ft (0.8m), 9s 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 (Aug 21) at 1AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.1m and 14s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Mewslade Bay in the next 16 days are 1.6m 9s and forecast to arrive on Wednesday (Aug 26) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Thursday (Aug 20) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 21st Aug) | 2.5ft (0.8m) 9s |
| Best Surf | 1AM (Fri 21st Aug) | 2.5ft (0.8m) 9s |
| Most Powerful | 1AM (Wed 26th Aug) | 5ft (1.6m) 9s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here again with the imperial read. We’re looking at a pretty lean run for Mewslade Bay over the next couple of weeks. The opening stretch looks flat or too messy to bother with, so don’t be in a hurry to grab your board. We’ve got a gap of quiet, small conditions from Wednesday the 19th right through to the end of the first week. Not much to get excited about.
Here’s how it shapes up: the first real pulse of energy doesn’t show until the afternoon of Saturday the 29th of August, where a clean, cross-off breeze meets a clean 4ft swell from the WSW with a period of 8 seconds. The combined energy of all swells directed here is moderate at 253. It’s small but clean, and the wind is right. With crowds possible out there, this is your window if you’re desperate for a session.
The standout event, if you have the skills, is on Monday the 31st of August morning. Swell is up to 12ft from the WSW with a period of 10 seconds, and the combined wave energy is very strong at 2091. The wind is cross-shore and fresh, so the surface will be lumpy. This is big water—over 8ft—so only for experts. Definitely not a beginner’s day. The afternoon drops slightly to 10ft.
Before that, a couple of other sessions show up but with caveats. The morning of Thursday the 20th has a clean 5ft swell from the WSW, period 8 seconds, and a moderate combined energy of 278, but the conditions are described as marginal. By the 30th of August, Sunday morning, there’s a clean 6ft swell from the WSW and a period of 8 seconds, but the fresh breeze at 22 mph makes it a messy prospect, despite the strong energy reading of 452.
The very end of the forecast, on the 1st of September, shows a clean 8ft swell from the WSW with a period of 10 seconds and very strong combined energy of 1919, but it’s again marginal. The wind stays okay, but the size rules out most folks.
Overall, patience is the name of the game. If you’re a confident surfer, circle the 31st of August on the calendar, but be ready for a challenge.
Rusty, signing off.
Short Range ForecastLight rain (total 6mm), mostly falling on Tue night. Very mild (max 18°C on Tue night, min 12°C on Thu night). Winds decreasing (fresh winds from the W on Wed afternoon, light winds from the N by Fri morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon afternoon, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 6 | WSW 5 | W 7 | WSW 8 | W 8 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 9 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | W 8 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 45 | 78 | 371 | 266 | 266 | 106 | 53 | 22 | 23 | 31 | 31 | 16 | 15 | 14 | 8 | 8 | 16 | 7 | 7 | 12 | 404 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-off | cross-off | off | cross-off | cross-off | cross-off | off | cross-off | off | glassy | cross | cross-off | cross | cross | cross-on | cross-off | cross-on | cross |
High Tide | 11:13AM6.91m | 11:35PM6.64m | 11:56AM6.32m | 00:23AM6.02m | 12:52PM5.80m | 1:31AM5.54m | 2:16PM5.50m | 3:07AM5.42m | 3:51PM5.63m | 4:30AM5.72m | 4:59PM6.09m | 5:25AM6.23m | 5:45PM6.67m | ||||||||
Low Tide | 4:59AM1.59m | 5:17PM1.85m | 5:39AM2.19m | 6:04PM2.43m | 6:31AM2.73m | 7:09PM2.91m | 7:50AM3.10m | 8:44PM3.11m | 9:29AM3.09m | 10:16PM2.89m | 10:45AM2.71m | 11:17PM2.42m | 11:36AM2.19m | 00:01AM1.88m | |||||||
 | |  |  | |  |  | | |  | |  | | | | | |  | | | | |
 | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — |
 | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:20 | — |
mm | — | — | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 |
Temp °C | 17 | 17 | 17 | 17 | 18 | 15 | 15 | 17 | 14 | 16 | 18 | 15 | 17 | 19 | 17 | 18 | 20 | 17 | 16 | 17 | 16 |
Feels °C | 13 | 12 | 13 | 12 | 13 | 11 | 12 | 13 | 10 | 15 | 14 | 11 | 15 | 16 | 13 | 15 | 16 | 12 | 14 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 6 | SW 16 | WSW 7 | WSW 8 | SW 14 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | W 9 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | SW 4 | WSW 9 |
| kJ | 45 | 10 | 269 | 266 | 8 | 106 | 53 | 22 | 23 | 31 | 31 | 16 | 15 | 14 | 7 | 7 | 16 | 7 | 7 | 5 | 404 |
Swell 2 Height (m) Direction Period (s) | W 10 | — | SW 16 | SW 15 | — | SW 14 | SW 13 | WSW 6 | WNW 4 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | W 8 | — |
| kJ | 7 | — | 10 | 8 | — | 8 | 7 | 7 | 1 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 12 | — |
Swell 3 Height (m) Direction Period (s) | SW 16 | — | — | W 15 | — | SW 14 | SW 16 | SW 13 | SW 13 | NW 6 | — | SW 12 | — | — | — | SW 14 | — | SW 13 | — | W 10 | — |
| kJ | 10 | — | — | 4 | — | 8 | 11 | 7 | 7 | 2 | — | 6 | — | — | — | 8 | — | 7 | — | 8 | — |
Wind waves Height (m) Direction Period (s) | — | WSW 5 | W 7 | — | W 8 | N 4 | NNW 3 | NW 3 | N 3 | — | WNW 4 | NNW 3 | — | — | NNW 3 | — | — | WNW 3 | — | — | SE 4 |
| kJ | — | 78 | 371 | — | 266 | 6 | 2 | 2 | 1 | — | 1 | 2 | — | — | 1 | — | — | 2 | — | — | 40 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 432 | 322 | 33 | 31 | 1 | 0 | 0 | 5 | 295 | 4 | 5 | 78 | 78 | 180 | 125 | 299 | 379 | 299 | 54 | 2 | 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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