Mewslade Bay Surf Break

Lat Long: 51.56° N 4.29° W

Mewslade Bay Surf Forecast and Surf Report

Issued: 6 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Mewslade Bay sea temperature is
20.7° C
4.3° 

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 17 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: Thursday 20 Aug, 1AM (local time) - 5.5ft (1.7m), 7s period, WSW swell with 319 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 1.7m 7s and forecast to arrive on Thursday (Aug 20) 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 3s period and expected on Thursday (Aug 20) at 7PM.

Wave TypeTime (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 (Thu 20th Aug)5.5ft (1.7m) 7s

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


The Lowdown

Alright, crew, Rusty here. Let's be real, the next couple of weeks are going to be a test of patience. There's a whole lot of small, junky surf on the menu before we get anything with real push behind it.

First thing you'll notice is the water is cooking at about 69°, which is a wild 8° warmer than it should be this time of year. You won't need a thick suit, that's for sure.

Mewslade Bay is the main break we're looking at. For the first week, from the 17th through the 24th, it's a waiting game. Swell is tiny, mostly 1ft to 5ft, with the wind all over the place, mostly cross or onshore. The energy is weak, mostly under 200 (think 60 to 213). We get some clean windows – like Tuesday morning the 18th with a 4ft W swell and a cross-off breeze, or Saturday afternoon the 22nd when it's glassy with a 1ft leftover – but the waves just aren't there. It's poor surf conditions, full stop.

We see some longer period swells on the 22nd and 23rd, but the size is nothing, just ankle-biters. It's a drought.

This whole first week is a gap with no real surf to offer. It isn't until late on the 28th that the ocean finally starts to wake up. The energy jumps to 661, but the wind is a nasty 22 mph onshore from the SSW. That's a blown-out mess.

Now, the one day that really stands out on the entire forecast is Saturday morning, the 29th. We're talking a 7ft swell from the WSW with a 9-second period. The wave energy is pumping, a strong 1139. The wind is a clean offshore-cross from the NW at 15 mph. That's the day. Mewslade should have real shape and power. This is one for the experienced surfers, though – anything over 5ft is going to push beginners around.

After that, the wind gets messy again at the end of the month with strong cross-onshores and lumpy, bigger swells up to 8ft. There's energy for sure, over 800 on the 31st, but it's going to be a battle. For the most part, the 29th is your window. It's far out, so keep your fingers crossed, but it's the only real standout worth planning for. The rest of the surf isn't worth the paddle.

Stay patient, mark the 29th on your calendar. This is Rusty, out.

Short Range Forecast

Light rain (total 6mm), mostly falling on Tue night. Very mild (max 18°C on Mon afternoon, min 15°C on Tue night). Mainly fresh winds.

Days 5-7 Weather Summary

Light rain (total 3mm), mostly falling on Thu afternoon. Very mild (max 18°C on Thu afternoon, min 12°C on Sat night). Wind will be generally light.

Mon
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
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
1
0
0
0
0
0
1
0
0
0
0
0
0
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)
0.8
WSW
6
0.9
WSW
5
1.2
W
7
1.1
WSW
6
1.3
W
6
1.2
W
6
1.5
WSW
6
1.7
WSW
7
1.4
WSW
7
1
WSW
7
0.8
WSW
9
0.6
WSW
8
0.5
W
8
0.4
WSW
9
0.3
WSW
10
0.3
WSW
10
0.2
WSW
9
0.2
W
9
0.2
W
9
0.2
W
8
Wave Graph
Metric surfscale
Energy kJ
42
33
126
98
128
112
160
319
197
99
106
53
33
25
18
18
8
8
8
8
Wind (km/h)
25
WSW
25
WSW
20
NW
25
W
20
NW
25
W
30
WSW
25
W
20
WNW
25
NW
20
N
10
ESE
10
NNW
10
ENE
25
E
5
N
20
NNE
5
NNE
15
WSW
15
NNE
Wind State
cross-on
cross-on
cross-off
cross-on
cross-off
cross
cross-on
cross
cross
cross-off
off
cross
cross-off
cross-off
cross-off
glassy
off
off
cross-on
off
High Tide
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
3:51PM5.63m
Low Tide
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
9:29AM3.09m
10:16PM2.89m
clear
part cloud
part cloud
part cloud
rain showers
rain showers
rain showers
rain showers
light rain
rain showers
clear
clear
rain showers
clear
rain showers
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:07
6:09
6:11
6:11
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:36
8:34
8:31
8:30
8:28
8:25
8:23
 mm
1
1
1
2
1
1
1
1
Temp °C
18
18
18
18
17
17
17
17
16
18
15
15
18
15
17
18
16
16
19
17
Feels °C
15
16
15
15
13
11
12
13
12
13
11
13
15
12
13
16
11
13
16
13
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Mewslade Bay:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Mewslade Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest