Mewslade Bay Surf Break

Lat Long: 51.56° N 4.29° W

Mewslade Bay Surf Forecast and Surf Report

Issued: 12 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Mewslade Bay sea temperature is
19.3°C
3.2° 

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 4 Sep 2026:

  • Best quality surf: Saturday 5 Sep, 10PM (local time) - 2.5ft (0.7m), 10s period, WSW swell with glassy winds.
  • Most powerful swell: Monday 7 Sep, 10AM (local time) - 6.5ft (2.0m), 13s period, WSW swell with 1,319 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 10PM (local time) - 2.5ft (0.7m), 10s 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 05) at 10PM. The primary swell is predicted to be 0.7m and 10s period with a secondary swell of 0.1m and 13s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Mewslade Bay in the next 16 days are 2.0m 13s and forecast to arrive on Monday (Sep 07) at 10AM. 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 4s period and expected on Friday (Sep 11) at 7AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Sat 5th Sep)2.5ft (0.7m) 10s
Best Surf10PM (Sat 5th Sep)2.5ft (0.7m) 10s
Most Powerful10AM (Mon 7th Sep)6.5ft (2.0m) 13s

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 cards for the next couple of weeks.

Right off the bat, I gotta be straight with you: the first week is a tough one. We’ve got waves, but the wind is just not playing ball. It’s a classic case of the swell showing up, but the conditions are more of a struggle than a stoke. The real standout for this whole forecast is a window that’s a solid week away—Monday the 14th of September. That’s where the magic is hiding.

Let’s start with this weekend. Friday morning (4th September) we’ve got a solid 7 ft swell from the WSW, but that 30 km/h cross-wind from the WNW is wrecking it. The combined energy is moderate at 568, but the surface is just lumpy cross-chop. It’s a write-off. Saturday and Sunday are even smaller, dropping to 3 ft and 2 ft, with cross-shore winds and weak energy. Not worth paddling out for.

Monday the 7th of September shows a bit of promise on paper, but it’s a tease. The morning has a 7 ft WSW swell with a very long period of 13 seconds, and the combined energy jumps right up to a strong 1614. That’s a groundswell with some real grunt. But the wind is a moderate cross-shore, and the forecast says it’s marginal due to tide. The afternoon gets worse as the wind swings onshore. It’s a spot that needs the right tide, so unless you’re local and know the bank, I’d let it pass.

Tuesday (8th September) keeps the size up at 7 ft to 8 ft from the W, but that fresh 30 km/h cross-wind is still there, keeping it rough and lumpy. The energy is moderate, but the quality is poor. The same story repeats through Wednesday and Thursday.

Now, Friday the 11th of September is interesting. The swell is down to 3 ft-4 ft, but we get a clean, cross-offshore wind from the NW at 30 km/h. The energy is weak to moderate, but the surface is clean. It’s small and clean, but still a bit of a wrestle with that wind.

The Standout

The best of the lot, and the one I’d be circling on the calendar, is Monday morning, the 14th of September. We’ve got a 8 ft swell from the WSW, and the combined energy is a solid 570. The wind is a light 10 km/h cross-offshore from the NW, keeping the surface clean. This is a legit option. The swell is a bit punchy at 8 ft, which is right on the edge of being too big for beginners—it’s more for the intermediate crew who know how to handle a bit of power. The direction is a solid WSW, which is where this spot likes it. Crowds are sometimes a thing here, so you might have some company, but with the conditions cleaning up, it’s a worthy early call.

The afternoon on the 14th drops off a bit as the wind swings onshore and gets stronger, so the morning is the window.

After that, the surf tails off into small, clean conditions through the middle of the month, with waist-high waves and offshore winds, but nothing with the size and energy of that Monday.

So, to sum it up: the first week is a bit of a battle with the wind. The real gem is that Monday morning, the 14th. Get on it if you can.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Thu night. Warm (max 22°C on Sun afternoon, min 14°C on Fri night). Winds decreasing (strong winds from the SW on Thu night, calm by Sat night).

Days 4-6 Weather Summary

Some drizzle, heaviest during Mon night. Very mild (max 18°C on Sun night, min 14°C on Mon night). Mainly fresh winds.

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
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
2
0
0
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)
2.1
WSW
8
1.8
WSW
8
1.6
W
7
1
W
7
0.9
WSW
7
0.7
WSW
9
0.6
WSW
9
0.8
WSW
6
1.1
SW
8
2
WSW
13
1.9
WSW
13
2.5
WSW
8
2.2
W
8
2.4
WSW
8
1.8
W
8
1.4
WSW
7
1.1
WSW
6
2
WSW
6
1.9
WSW
8
1.7
WSW
9
1.4
WSW
9
Wave Graph
Metric surfscale
Energy kJ
560
406
269
89
91
86
62
48
140
1319
1139
675
659
627
387
191
108
340
468
423
287
Wind (km/h)
30
WNW
30
W
30
WNW
10
WNW
15
WSW
10
SSE
20
SE
10
S
25
SW
25
WNW
25
WSW
30
WNW
30
W
30
W
30
WNW
30
W
30
WSW
45
SW
20
WNW
20
WSW
35
NW
Wind State
cross
cross
cross
cross
cross-on
cross-on
cross
on
on
cross
cross-on
cross
cross
cross
cross
cross
cross-on
on
cross
cross-on
cross-off
High Tide
11:43AM6.88m
00:16AM6.58m
12:52PM6.37m
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
Low Tide
5:16AM1.67m
5:45PM1.90m
6:20AM2.24m
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
light rain
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
rain showers
clear
part cloud
clear
part cloud
cloud
mod rain
rain showers
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:35
6:35
6:37
6:39
6:41
6:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:58
7:54
7:52
7:51
7:49
7:45
7:44
 mm
2
1
10
1
Temp °C
16
17
16
15
15
16
20
22
18
17
17
16
15
16
16
16
16
16
18
18
17
Feels °C
11
11
11
14
13
13
16
20
16
12
13
10
9
9
10
10
11
11
16
15
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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