Mewslade Bay Surf Break

Lat Long: 51.56° N 4.29° W

Mewslade Bay Surf Forecast and Surf Report

Issued: 6 am 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Mewslade Bay sea temperature is
20.6° C
4.2° 

Mewslade Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Mewslade Bay surf forecast from 16 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 1AM (local time) - 2ft (0.6m), 8s period, W swell with offshore winds.
  • Most powerful swell: Thursday 20 Aug, 4AM (local time) - 7ft (2.2m), 8s period, W swell with 558 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 1AM (local time) - 2ft (0.6m), 8s period with W 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 Saturday (Aug 22) at 1AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.1m and 16s. 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 2.2m 8s and forecast to arrive on Thursday (Aug 20) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Friday (Aug 21) at 4AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sat 22nd Aug)2ft (0.6m) 8s
Best Surf 1AM (Sat 22nd Aug)2ft (0.6m) 8s
Most Powerful 4AM (Thu 20th Aug)7ft (2.2m) 8s

Table - best surf conditions forecast for Mewslade Bay over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s see what’s coming our way for Mewslade Bay over the next couple of weeks.

First off, I gotta be straight with you – the water is way warmer than normal right now, sitting at 69°F, which is a solid 8°F above what we’d usually expect for this time of year. That’s a real treat for the skin.

But for the surf? It’s a tough watch, especially for the next week and a half. We’re looking at a long, dry spell. From Sunday the 16th all the way through to Thursday morning the 27th, there’s nothing worth paddling out for. The energy is just too weak, often dipping below 100 (like 18 on the 16th), and the winds are all over the place – mostly cross or cross-onshore, with some strong breezes kicking up lumps. The swell heights are tiny, mostly under 3 ft, and the periods are short, so there’s just no push.

Even when we get a bit of swell mid-week, like Tuesday the 18th morning with a 4 ft swell from the west, it’s still got a poor wave comment and the energy is only moderate (214). The wind is messy cross-shore, so it’s not doing us any favours. The bigger stuff on the 19th and 20th, with 5 ft to 6 ft swells, is all blown out by fresh cross-shore winds. Honestly, for a few of those days, the setup looks more interesting for kite surfing than paddle surfing.

Now, for the patient ones among you, there’s a light at the end of the tunnel. The real standout shows up on Friday the 28th of August. That morning, we’ve got a clean 6 ft swell from the WSW with a period of 7 seconds. The energy jumps up to 376 (strong), and with a light offshore cross-off breeze from the east, it’s going to be clean. This is your best bet for the whole period – a solid, ridable size with decent shape. The afternoon holds up too, with a 6 ft swell and still clean conditions.

Then Saturday the 29th of August morning is another good call. A 5 ft swell from the west, with a light offshore wind from the NNE. That’s clean, glassy potential, and the energy is still decent at 253. It’s a bit smaller by the afternoon, but still fun.

So, to sum it up: the first week and a half is a write-off. Just don’t bother. But if you’ve got the patience, the last weekend of August is looking like a real gem for Mewslade Bay. Keep your fingers crossed those long-range forecasts hold.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Tue night. Very mild (max 19°C on Mon morning, min 14°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 6mm), mostly falling on Wed night. Very mild (max 18°C on Thu afternoon, min 13°C on Thu night). Winds decreasing (fresh winds from the W on Wed night, light winds from the N by Fri night).

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
WSW
7
0.3
WSW
7
0.3
WSW
7
0.5
W
5
0.8
W
5
0.6
W
7
1.2
W
6
0.9
W
6
0.8
WSW
6
1.5
W
6
1.8
WSW
7
2.1
W
8
1.8
W
8
1.5
W
7
0.9
WSW
7
0.8
WSW
6
0.7
W
6
0.6
W
8
0.4
WSW
8
0.3
W
8
0.3
WSW
10
Wave Graph
Metric surfscale
Energy kJ
18
10
10
14
34
38
109
58
46
194
299
545
377
246
73
56
32
51
22
12
18
Wind (km/h)
5
N
25
W
15
WNW
10
NW
25
W
15
WSW
20
WNW
25
W
20
NW
25
WNW
35
W
35
W
30
WNW
30
WNW
20
NNW
20
NNW
20
WNW
15
N
20
N
25
NNW
25
NNE
Wind State
glassy
cross-on
cross
cross-off
cross-on
cross-on
cross
cross
cross-off
cross
cross-on
cross
cross
cross
cross-off
cross-off
cross
off
off
cross-off
off
High Tide
9:40PM8.46m
9:59AM7.98m
10:17PM7.94m
10:35AM7.48m
10:54PM7.30m
11:13AM6.91m
11:35PM6.64m
11:56AM6.32m
00:23AM6.02m
12:52PM5.80m
1:31AM5.54m
2:16PM5.50m
3:07AM5.42m
Low Tide
3:25PM0.37m
3:48AM0.53m
4:02PM0.76m
4:23AM1.02m
4:38PM1.28m
4:59AM1.59m
5:17PM1.85m
5:39AM2.19m
6:04PM2.43m
6:31AM2.73m
7:09PM2.91m
7:50AM3.10m
8:44PM3.11m
part cloud
cloud
cloud
part cloud
clear
part cloud
part cloud
cloud
rain showers
cloud
clear
rain showers
rain showers
rain showers
rain showers
part cloud
clear
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:03
6:05
6:07
6:09
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:37
8:36
8:34
8:31
8:30
8:28
8:25
 mm
1
3
1
1
1
Temp °C
17
17
18
19
18
18
18
18
18
16
17
16
17
18
15
15
16
14
17
17
15
Feels °C
15
13
19
16
15
17
16
14
15
11
10
9
11
12
11
11
11
10
13
11
10
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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