Mewslade Bay Surf Break

Lat Long: 51.56° N 4.29° W

Mewslade Bay Surf Forecast and Surf Report

Issued: 6 pm 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Mewslade Bay sea temperature is
19.0°C
2.9° 

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 5 Sep 2026:

  • Best quality surf: Saturday 12 Sep, 7AM (local time) - 3.5ft (1.0m), 8s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 1AM (local time) - 7ft (2.2m), 12s period, WSW swell with 1,280 kJ wave energy.
  • Next surfable swell (1★+): Saturday 12 Sep, 7AM (local time) - 3.5ft (1.0m), 8s 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 Saturday (Sep 12) at 7AM. The primary swell is predicted to be 1.0m and 8s period. 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 2.2m 12s and forecast to arrive on Tuesday (Sep 08) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Sep 12) at 10PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Sat 12th Sep)3.5ft (1.0m) 8s
Best Surf 7AM (Sat 12th Sep)3.5ft (1.0m) 8s
Most Powerful 1AM (Tue 8th Sep)7ft (2.2m) 12s

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


The Lowdown

Alright, Rusty here, looking at the local surf scene for the next couple of weeks.

We're staring down a bit of a flat spell, I'm not gonna lie. The first real shot of decent surf doesn't roll in until Monday morning, the 7th of September, and even then, it's a tricky one. The whole outlook is a bit of a grind, with only a few windows that might be worth a paddle. The water's sitting at a very warm 66°, which is a couple of degrees warmer than usual for this time of year, so at least you won't need a thick wetsuit.

Let's talk about the only real standout in this whole forecast. Mewslade Bay is your best bet, and it's a Monday morning session on the 7th of September. We're looking at a solid 5ft of swell, coming from the WSW, and the period is a very long 14 seconds. That's a proper groundswell, packing a ton of energy (1352). The wind is cross from the WNW, which isn't perfect, but it's clean enough to get some decent shape. This is a fairly consistent spot, exposed to the swell, and it's an intermediate wave. With that kind of size and period, it's going to be a proper session for anyone who's got a bit of experience, but it could be too much for beginners. The north-northeast wind is offshore, so the faces should be smooth. The downside is that crowds are possible here, so you might have some company.

The rest of the period is a real struggle. After that Monday morning, the wind ruins it. The afternoon of the 7th swings onshore and gets choppy. The swell hangs around for a couple of days, with Tuesday the 8th seeing 6ft of swell from the WSW in the morning, but a fresh 19 mph cross-shore wind turns it into a lumpy mess. The wave energy is actually moderate to strong (603), but the quality is just poor. The same story repeats on Wednesday the 9th of September, with a clean 4ft in the morning (cross-offshore wind from the NW), but the period drops to 7 seconds, so it's a weaker, short-period swell. The afternoon gets choppy again.

There's a gap of a few days of really small, weak surf. The swell drops dramatically, and the energy readings are tiny. A brief window appears on the morning of Saturday the 12th: a small 3ft wave from the WSW, but with a clean cross-offshore wind from the NNW and a light breeze. It's surfable, but nothing to get excited about. The energy is weak (102). The same goes for the morning of Sunday the 13th of September, with a tiny 2ft wave, clean wind, but it's just knee-high and weak.

The second week doesn't offer much hope. The 18th of September, Friday afternoon, might be worth a look. It's a glassy 4ft from the WSW, but the period is a short 6 seconds, so expect weak, crumbly waves. The combined energy is very low (95). The look of the 20th of September, Sunday morning, is clean with a 2ft wave from the west, but again, it's not going to be setting the world on fire.

So, to be brutally honest, if you're a keen surfer, you circle Monday morning the 7th of September at Mewslade Bay. That's your only real shot at a proper wave. The rest of the sixteen days is a lot of waiting and watching the horizon. The conditions are just not aligning for any other standout sessions.

Rusty.

Short Range Forecast

Light rain (total 7mm), mostly falling on Mon night. Warm (max 21°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the SSE on Sat night, fresh winds from the WSW by Mon night).

Days 5-7 Weather Summary

Light rain (total 6mm), mostly falling on Thu night. Very mild (max 18°C on Thu night, min 13°C on Tue night). Winds increasing (light winds from the WSW on Wed night, fresh winds from the SW by Thu night).

Sat
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
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
2
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
WSW
7
0.7
WSW
9
0.7
WSW
6
0.9
WSW
6
0.9
WSW
7
1.6
WSW
14
1.8
WSW
13
2.2
WSW
12
1.8
WSW
10
1.7
WSW
6
1.6
W
7
1.3
W
7
1
W
7
0.5
WSW
8
0.9
WSW
7
1.3
WSW
6
1.6
WSW
8
1.3
WSW
9
1.3
WSW
8
1.4
WSW
8
Wave Graph
Metric surfscale
Energy kJ
97
86
33
62
93
986
1025
1280
603
245
233
159
86
32
74
101
329
264
240
204
Wind (km/h)
15
WSW
15
SSE
15
SE
15
SSW
20
SW
20
WNW
25
WSW
25
WSW
30
WNW
30
W
30
NW
25
NW
25
WNW
5
WSW
10
SW
25
SW
35
SW
30
NW
30
WNW
20
NW
Wind State
cross-on
cross-on
cross
on
cross-on
cross
cross-on
cross-on
cross
cross
cross-off
cross-off
cross
cross-on
on
cross-on
on
cross-off
cross
cross-off
High Tide
1:38AM6.14m
2:24PM6.19m
3:16AM6.18m
3:56PM6.54m
4:36AM6.67m
5:04PM7.20m
5:34AM7.31m
5:56PM7.89m
6:21AM7.90m
6:40PM8.44m
7:02AM8.34m
7:20PM8.77m
Low Tide
7:06PM2.39m
7:55AM2.58m
8:54PM2.45m
9:38AM2.39m
10:25PM1.99m
10:53AM1.83m
11:27PM1.35m
11:47AM1.20m
00:15AM0.74m
12:31PM0.65m
00:56AM0.29m
1:10PM0.27m
1:33AM0.05m
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
rain showers
clear
clear
clear
clear
part cloud
cloud
part cloud
cloud
light rain
rain showers
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:37
6:39
6:41
6:43
6:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:54
7:52
7:51
7:49
7:45
7:44
7:42
 mm
7
5
1
Temp °C
15
16
20
21
18
16
17
17
16
16
15
15
16
16
17
17
18
17
17
16
Feels °C
13
13
18
19
17
12
13
13
9
10
8
10
11
14
14
13
14
11
10
12
  • 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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