Mewslade Bay Surf Break

Lat Long: 51.56° N 4.29° W

Mewslade Bay Surf Forecast and Surf Report

Issued: 12 am 14 Sep 2026 (local time)

Forecast update in  hr  min

Today's Mewslade Bay sea temperature is
18.5°C
2.7° 

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 14 Sep 2026:

  • Best quality surf: Sunday 20 Sep, 7AM (local time) - 3.5ft (1.1m), 7s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 16 Sep, 7AM (local time) - 5ft (1.6m), 10s period, W swell with 464 kJ wave energy.
  • Next surfable swell (1★+): Sunday 20 Sep, 7AM (local time) - 3.5ft (1.1m), 7s 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 Sunday (Sep 20) at 7AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.5m and 9s. 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 1.6m 10s and forecast to arrive on Wednesday (Sep 16) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Wednesday (Sep 16) at 1AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Sun 20th Sep)3.5ft (1.1m) 7s
Best Surf 7AM (Sun 20th Sep)3.5ft (1.1m) 7s
Most Powerful 7AM (Wed 16th Sep)5ft (1.6m) 10s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s on the menu for Mewslade Bay over the next couple of weeks. I gotta be straight with you: we’ve got a bit of a rough patch to sit through before any kind of reward shows up.

The overall pattern is pretty grim to start. You can forget about the first week and a half for any decent surf. We’re looking at a long gap with nothing worthwhile, just a series of poor conditions with lumpy cross-shore and onshore winds messing things up. The only spark in the first week comes on Sunday, the 20th of September. That morning, we get a tiny bump of relief. Swell is a weak 4ft from the west, period is short at 7 seconds, and the combined energy is only 133 – pretty weak. But the wind switches to a light offshore from the northeast at 3 mph, cleaning it right up. It’s still only surfable, nothing special, and with the crowds being “sometimes” an issue here, you might get a few friends out. That’s the one morning you could stretch your arms.

Then we go right back into a slop-fest until Tuesday the 22nd of September. That afternoon is the first real standout. The swell is 5ft from the west, period is a short 7 seconds, but combined energy jumps to 311 – a moderate pulse. The wind goes glassy. I mean, absolute flat calm. The notes say “expect good surf conditions,” and that’s a rare bit of optimism for this forecast. The water temperature is about average for the time of year, so no need for a thick suit unless you run cold.

Now, hold on, because the real story is the very end of the run. Sunday the 27th of September. This is the big one, but there’s a massive caveat. We’ve got a solid 10ft swell from the west-southwest, with a period of 8 seconds in the morning and 11 seconds in the afternoon. The combined energy is monstrous – 1259 in the morning, ramping up to 1726 in the arvo. That’s strong wave energy. The wind is light and favorable, but the guidance flat-out says it’s predicted to be too big for this break. You’d need to be an expert, and even then, it could be a washing machine. So this is a “look but don’t touch” kind of day. The following Monday morning, the 28th, drops back to a more manageable 5ft from the west-southwest, but it’s still marginal.

So, if I’m calling it: the best bet on offer is that glassy Tuesday afternoon, the 22nd. It’s clean, it’s surfable, and it’s the only window that ticks all the right boxes without being too much.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Mon night. Very mild (max 18°C on Sun night, min 13°C on Tue night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 8mm), mostly falling on Wed night. Very mild (max 17°C on Fri night, min 13°C on Thu night). Mainly fresh winds.

Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
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
1
0
0
0
0
0
0
0
0
0
0
0
1
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)
1.2
WSW
9
1.2
WSW
6
1.7
WSW
6
1.6
W
7
1.4
WSW
7
1.5
WSW
8
1.3
W
10
0.7
W
10
1.4
WSW
5
1.8
W
7
1.7
W
7
1.8
W
7
1.7
W
7
1.6
WSW
7
2
WSW
7
1.9
WSW
7
2
WSW
7
1.7
WSW
8
1.1
W
7
0.9
WSW
8
0.6
WSW
7
Wave Graph
Metric surfscale
Energy kJ
227
90
211
243
191
286
313
100
109
315
303
358
286
232
404
356
405
310
124
119
42
Wind (km/h)
20
WSW
20
SW
35
SW
30
WNW
30
WNW
30
NW
20
NW
25
WNW
30
WSW
30
NW
30
WNW
25
WNW
25
W
30
WSW
25
W
20
WSW
25
W
15
W
5
NE
10
SE
15
WSW
Wind State
cross-on
on
on
cross
cross
cross-off
cross-off
cross
cross-on
cross-off
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross
cross-on
High Tide
8:50AM8.41m
9:07PM8.36m
9:23AM8.05m
9:41PM7.85m
9:57AM7.56m
10:15PM7.24m
10:31AM6.98m
10:52PM6.59m
11:11AM6.37m
11:36PM5.96m
12:03PM5.79m
00:42AM5.44m
1:27PM5.41m
2:25AM5.26m
Low Tide
2:53PM0.34m
3:10AM0.55m
3:25PM0.72m
3:41AM1.03m
3:58PM1.23m
4:14AM1.59m
4:33PM1.81m
4:50AM2.19m
5:15PM2.43m
5:38AM2.77m
6:18PM2.98m
6:58AM3.22m
8:06PM3.24m
rain showers
part cloud
rain showers
clear
clear
clear
cloud
part cloud
light rain
part cloud
cloud
part cloud
cloud
rain showers
light rain
light rain
part cloud
cloud
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:50
6:52
6:54
6:54
6:56
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:35
7:32
7:30
7:28
7:25
7:22
7:21
 mm
1
4
4
1
2
1
Temp °C
17
18
18
15
16
16
15
15
16
14
15
15
16
16
17
17
17
16
14
16
18
Feels °C
16
16
14
9
10
12
11
10
10
8
8
9
11
11
14
15
14
14
13
17
18
  • 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 

Eyeball surf reportRecent Eyeball Surf Reports for Wales - Gower

  1. West Coast Surf: ‘Porth Neigwl: Choppy waves hadn't tidied much (from what I could see in the dark.’

    Hells Mouth (Porth Neigwl), 141 km away
Expand
<
>
View all

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