Surf Forecasts:
Mewslade Bay surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 7AM (local time) - 2ft (0.6m), 9s period, WSW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 7AM (local time) - 6ft (1.8m), 8s period, W swell with 368 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 7AM (local time) - 2ft (0.6m), 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 7AM. The primary swell is predicted to be 0.6m 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 1.8m 8s and forecast to arrive on Thursday (Aug 20) 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 0.8m 4s period and expected on Tuesday (Aug 25) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 21st Aug) | 2ft (0.6m) 9s |
| Best Surf | 7AM (Fri 21st Aug) | 2ft (0.6m) 9s |
| Most Powerful | 7AM (Thu 20th Aug) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, Rusty here again. This is a rough one, mate. The full 16-day outlook for Mewslade Bay is a dud. There’s no surf worth chasing. The first few days are a total loss with rain and a strong crosswind on a weak, crummy swell. The middle of the period is flat or near-flat, barely a bump until the 26th of August, when a short-period windswell shows up, but it’s cross-onshore and choppy. A bigger pulse comes through around the 28th of August, but it’s hammered by onshore winds, making it a total mess. The swell gets up to 10 feet on the 31st of August, but with a fresh onshore wind and a stormy feel, it’s only for the crazies. The combined energy of all swells directed here hits 1263 (strong to very strong wave energy) on the 31st, but it’s completely unsurfable. With the constant wind issues and the beach setup, this whole stretch looks more interesting for kite surfing than paddle surfing. The only tiny window is on the 1st of September morning, with a clean 4 feet from the west and a light cross-off breeze, but it’s just ‘surfable but very ordinary.’ The 2nd of September morning has a glassy 3 feet from the southwest, but it’s tiny. Water temp is about average for the time of year. No standouts here. The best you’ll get is a clean, small wave session on the 1st of September, but even that’s a long shot. Mewslade Bay is a bleak picture for the next two weeks. Don’t hold your breath.
Short Range ForecastLight rain (total 6mm), mostly falling on Wed night. Very mild (max 19°C on Sat afternoon, min 13°C on Thu night). Winds decreasing (fresh winds from the NNW on Thu afternoon, calm by Sat morning). | Days 4-6 Weather SummarySome drizzle, heaviest during Tue afternoon. Warm (max 25°C on Mon afternoon, min 13°C on Sat night). Winds increasing (light winds from the S on Sun morning, strong winds from the E by Mon night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 7 | W 7 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | W 9 | WSW 9 | SW 10 | SW 9 | WSW 9 | SW 13 | SW 13 | SW 13 | SW 9 | SW 5 | WSW 5 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 259 | 198 | 106 | 53 | 22 | 23 | 18 | 18 | 16 | 8 | 8 | 23 | 13 | 8 | 7 | 7 | 7 | 46 | 49 | 67 | 148 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross | cross | cross-on | cross | cross-on | glassy |
High Tide | 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 | 6:06AM6.78m | 6:23PM7.25m | ||||||||
Low Tide | 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 | 12:15PM1.66m | 00:37AM1.35m | |||||||
 | |  |  |  |  | | | | | | | | | |  | | | |  |  | |
 | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:20 | — | — | 8:17 | — |
mm | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 3 | 7 |
Temp °C | 16 | 17 | 15 | 16 | 17 | 15 | 16 | 19 | 16 | 17 | 20 | 19 | 21 | 25 | 20 | 18 | 17 | 18 | 19 | 22 | 18 |
Feels °C | 11 | 12 | 10 | 12 | 13 | 11 | 15 | 15 | 12 | 15 | 16 | 16 | 16 | 20 | 13 | 11 | 12 | 15 | 16 | 19 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | SW 14 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | W 9 | WSW 9 | SW 10 | SW 9 | WSW 9 | SW 8 | W 8 | SW 8 | — | W 9 | — | WSW 7 |
| kJ | 259 | 8 | 106 | 53 | 22 | 23 | 18 | 18 | 16 | 6 | 7 | 23 | 13 | 8 | 3 | 1 | 3 | — | 14 | — | 148 |
Swell 2 Height (m) Direction Period (s) | SW 14 | W 14 | SW 14 | SW 13 | WSW 6 | WNW 4 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | W 8 | SW 13 | SW 13 | W 10 | SW 13 | W 12 | W 12 |
| kJ | 8 | 4 | 8 | 7 | 12 | 3 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 1 | 7 | 7 | 2 | 6 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | W 15 | — | SW 14 | SW 16 | SW 13 | SW 16 | SW 15 | S 12 | SW 12 | — | — | — | W 10 | W 9 | SW 13 | SW 8 | W 8 | — | — | — | — |
| kJ | 4 | — | 8 | 11 | 7 | 10 | 9 | 3 | 6 | — | — | — | 2 | 2 | 7 | 3 | 1 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 7 | W 7 | N 4 | NNW 4 | WNW 4 | NNE 3 | — | — | NNW 2 | — | — | — | E 3 | E 4 | ESE 4 | E 4 | E 4 | SW 9 | SW 5 | WSW 5 | — |
| kJ | 243 | 198 | 10 | 7 | 8 | 3 | — | — | 1 | — | — | — | 7 | 14 | 21 | 9 | 9 | 46 | 49 | 67 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 429 | 322 | 0 | 1 | 274 | 4 | 4 | 118 | 4 | 54 | 180 | 48 | 377 | 66 | 323 | 274 | 153 | 126 | 274 | 171 | 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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