Mewslade Bay Surf Break

Lat Long: 51.56° N 4.29° W

Mewslade Bay Surf Forecast and Surf Report

Issued: 6 am 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Mewslade Bay sea temperature is
20.0° C
4.7° 

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 12 Jul 2026:

  • Most powerful swell: Saturday 18 Jul, 1AM (local time) - 1.5ft (0.5m), 6s period, SW swell with 21 kJ wave energy.

Best Forecast Surf Conditions for Mewslade Bay this week:

The most powerful waves expected at Mewslade Bay in the next 16 days are 0.5m 6s and forecast to arrive on Saturday (Jul 18) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Monday (Jul 13) at 1AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1AM (Sat 18th Jul)1.5ft (0.5m) 6s

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


Right, let’s have a look at what’s on for Mewslade Bay over the next couple of weeks.

Gotta be straight with you – it’s a pretty grim outlook for most of the period. The first week and a half is basically a write-off. We’re looking at tiny, weak waves, with combined swell energy barely cracking 30 (20–30 range) for days on end. That’s just not enough to push a decent ride. The water is a balmy 68°F, which is a solid 9°F warmer than normal for this time of year – that’s very unusual, and honestly, almost feels like a tropical anomaly. But with the swell being so flat, it’s more of a swimming day than a surfing one.

We’ve got a few days of glassy conditions on Friday morning, July 17, and again on Tuesday morning, July 21, but with swell heights of just 1.0ft to 1ft and periods of 6 seconds, it’s barely a ripple. The wind is light or calm, which would be perfect if there was any wave to surf. There’s a long gap of very poor surf quality from now through to about July 23.

Now, things do perk up a little around July 24. On Friday morning, July 24, we start to see some life: a 3ft swell from the west with a period of 6 seconds, and fresh cross-offshore winds from the northwest. The combined energy jumps to 82 – still weak, but it’s movement. The real uptick comes on Saturday afternoon, July 25, and into Sunday, July 26. On Sunday morning, July 26, we’ve got a 7ft swell from the west-southwest, period of 8 seconds, and combined energy of 488 (moderate). That’s the biggest swell of the window. But – and it’s a big but – the wind is fresh cross-onshore from the west-southwest, making it lumpy and choppy. The water will be messy, not clean. For experienced surfers, there might be some punchy, albeit messy, waves. For beginners, 7ft is too big, and with the chop, it’s not a good call. The swell direction is west-southwest, which matches the optimum direction of southwest for Mewslade Bay, so it’s hitting the bay well, but the wind is the spoiler.

The standout, if you can call it that, is probably the Sunday morning, July 26, session for the size, but it’s a battle. The best quality on offer might actually be the Friday morning, July 24, with cleaner cross-offshore wind and a more manageable 3ft, though the energy is still low. For a true clean, glassy window with any size, we’re just not getting it.

Overall, this is a lean run. Mewslade Bay is an exposed spot, but it’s going to need a better alignment of swell and wind to fire. The forecast is more reliable in the near term, and the long-range standouts are promising but uncertain. For now, it’s a case of watching and waiting for the next proper swell.

Rusty

Short Range Forecast

Mostly dry. Warm (max 31°C on Tue afternoon, min 15°C on Sun night). Winds decreasing (strong winds from the ENE on Sun night, calm by Tue afternoon).

Days 4-6 Weather Summary

Moderate rain (total 14mm), heaviest on Wed afternoon. Warm (max 29°C on Wed afternoon, min 16°C on Thu night). Wind will be generally light.

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
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
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)
0.2
W
8
0.1
W
21
0.1
W
16
0.1
SW
20
0.1
SW
19
0.1
SW
15
0.2
W
11
0.2
WSW
11
0.2
WSW
10
0.3
WSW
10
0.3
WSW
9
0.3
WSW
9
0.3
SW
8
0.4
SW
7
0.4
SW
7
0.4
SW
6
0.3
SW
6
0.5
SW
6
0.4
SW
6
0.4
SW
6
0.4
SW
6
Wave Graph
Metric surfscale
Energy kJ
10
10
5
15
15
8
12
12
10
19
16
16
9
18
11
14
6
21
13
9
8
Wind (km/h)
20
E
15
ENE
35
ENE
25
ENE
10
E
25
E
15
E
10
N
35
E
10
ESE
10
N
15
ENE
5
E
5
WNW
10
SSW
5
WSW
20
WSW
5
NW
5
ESE
15
W
10
E
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross
on
glassy
cross-on
cross-off
cross
cross-on
cross-off
High Tide
5:17PM7.41m
5:48AM7.57m
6:15PM7.91m
6:43AM7.97m
7:07PM8.37m
7:34AM8.27m
7:56PM8.68m
8:21AM8.40m
8:42PM8.78m
9:06AM8.34m
9:27PM8.66m
9:50AM8.11m
10:10PM8.34m
Low Tide
10:57AM1.45m
11:30PM1.21m
11:58AM1.06m
00:29AM0.76m
12:52PM0.68m
1:22AM0.39m
1:42PM0.41m
2:11AM0.18m
2:28PM0.29m
2:57AM0.17m
3:13PM0.36m
3:41AM0.35m
3:56PM0.60m
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
rain showers
rain showers
light rain
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:13
5:13
5:15
5:16
5:16
5:18
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:30
9:30
9:29
9:28
9:27
9:25
9:24
 mm
4
1
2
1
2
2
1
1
2
4
3
Temp °C
25
30
23
23
28
24
25
31
27
24
29
26
19
23
20
18
19
18
20
23
22
Feels °C
23
25
15
19
25
18
24
31
25
24
27
26
18
22
19
17
17
17
21
22
21
  • 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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