Tenby (South Beach) Surf Break

Lat Long: 51.67° N 4.70° W

Tenby (South Beach) Surf Forecast and Surf Report

Issued: 6 am 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Tenby (South Beach) sea temperature is
19.3° C
2.9° 

Tenby (South Beach) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Tenby (South Beach) surf forecast from 17 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 4AM (local time) - 6ft (1.9m), 8s period, WSW swell with offshore winds.
  • Most powerful swell: Wednesday 19 Aug, 10PM (local time) - 7.5ft (2.3m), 8s period, WSW swell with 576 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 4AM (local time) - 6ft (1.9m), 8s period with WSW swell.

Best Forecast Surf Conditions for Tenby (South Beach) this week:

The surf forecast for Tenby (South Beach) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 4AM. The primary swell is predicted to be 1.9m and 8s period with a secondary swell of 0.1m and 15s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Tenby (South Beach) in the next 16 days are 2.3m 8s and forecast to arrive on Wednesday (Aug 19) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Tuesday (Aug 18) at 4AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Thu 20th Aug)6ft (1.9m) 8s
Best Surf 4AM (Thu 20th Aug)6ft (1.9m) 8s
Most Powerful10PM (Wed 19th Aug)7.5ft (2.3m) 8s

Table - best surf conditions forecast for Tenby (South Beach) over the next 16 days.


The Lowdown

Alright, mates. Rusty here. Let’s cut to the chase—this 16-day stretch for Tenby (South Beach) is a rough one. We’re staring down a long, flat spell with only a couple of moments that might get you excited.

The water’s sitting at 67°F right now, which is much warmer than usual for this time of year. That’s a nice little bonus if you’re thinking of a swim, but the waves are a whole different story.

The first week is a total write-off. From Monday the 17th right through to Sunday the 23rd, the swell is tiny, and the models are calling it “poor surf conditions” across the board. Expect flat, weak waves with light wind. There’s a flicker of something on the 20th (Thursday morning) with a 5ft W swell under a clean offshore NNW wind, but it’s still described as “very ordinary.” Not worth paddling out for.

We get a bit more energy through the middle of the second week, but the quality stays poor. On the 27th (Thursday) the afternoon swell nudges up to 6ft from the SW, but with a short period and cross-off wind, it’s messy. The first real standout doesn’t show up until Friday the 28th of August. The morning session is the pick of the entire forecast: a 7ft WSW swell, with a very long period of 10 seconds, combined energy of 766 (moderate), and a clean, light offshore breeze. That’s proper groundswell energy, and the conditions are actually described as “expect good surf conditions.” This is the one to aim for—but it’s over 5ft, so it’s a bit much for beginners, and the long period might make it a bit fat and draining at the beach break. Still, the best we’ve got.

The rest of the run tapers off. The 29th (Saturday) morning offers a 4ft NW swell with clean offshore wind, but it’s “very ordinary.” The 30th (Sunday) morning has a 7ft SW swell, but again, the quality isn’t there. The 31st (Monday) morning sees the biggest energy spike of the whole period—7ft W swell with a combined energy of 1364 (very strong wave energy)—but it’s flagged as “marginal surf forecast” with a risk of thunderstorms and strong winds. That’s a kite-surfing setup if I’ve ever seen one.

So, to sum it up: there’s a long, dry gap from the start until the 28th, and then a short window of interest. The standout is Friday the 28th morning at Tenby (South Beach) in the UK. For the rest, keep your expectations in the parking lot.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Wed night. Warm (max 20°C on Mon morning, min 13°C on Wed night). Mainly fresh winds.

Days 4-6 Weather Summary

Some drizzle, heaviest during Fri morning. Very mild (max 19°C on Thu afternoon, min 13°C on Thu night). Wind will be generally light.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
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
1
1
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)
0.8
W
6
0.3
W
8
0.1
SW
16
1.2
W
6
1.1
W
6
1.5
WSW
7
1.6
W
7
1.8
WSW
7
2.2
WSW
8
1.4
WSW
7
1
W
7
0.6
WSW
9
0.5
W
8
0.4
WSW
8
0.3
WSW
9
0.4
WSW
10
0.4
WSW
10
0.2
SSW
15
0.2
SSW
14
0.2
SSW
14
0.2
SSW
14
Wave Graph
Metric surfscale
Energy kJ
40
12
11
115
94
192
233
317
570
203
89
59
36
24
15
33
31
21
20
19
20
Wind (km/h)
15
WNW
25
W
25
WSW
25
NW
25
W
20
WNW
30
W
35
WSW
20
WNW
20
NNW
30
NNW
20
N
15
N
20
NW
20
N
20
NE
20
N
20
NNE
20
NNE
25
N
20
N
Wind State
off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
10:17PM7.48m
10:35AM7.05m
10:55PM6.89m
11:14AM6.51m
11:35PM6.26m
11:58AM5.96m
00:25AM5.67m
12:55PM5.47m
1:34AM5.23m
2:19PM5.20m
3:09AM5.13m
3:52PM5.33m
Low Tide
4:06PM0.72m
4:27AM0.97m
4:42PM1.21m
5:03AM1.52m
5:21PM1.77m
5:43AM2.09m
6:07PM2.32m
6:35AM2.60m
7:13PM2.78m
7:55AM2.95m
8:51PM2.96m
9:36AM2.93m
10:23PM2.72m
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
light rain
rain showers
cloud
clear
part cloud
rain showers
clear
clear
part cloud
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:07
6:09
6:09
6:11
6:13
6:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:37
8:36
8:34
8:31
8:30
8:28
8:25
 mm
1
3
1
Temp °C
20
20
18
19
18
18
18
18
16
16
19
14
16
17
13
17
18
15
18
19
14
Feels °C
17
17
16
15
14
15
12
12
12
12
14
10
13
12
10
14
13
12
14
13
10
  • 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 Tenby (South Beach) Surf forecast

The above surf forecast table for Tenby (South Beach) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Tenby (South Beach) can be found by selecting the local surf guide option on the grey menu. Our Tenby (South Beach) 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 (Tenby (South Beach)) 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 Tenby (South Beach) 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.

Are you planning a holiday in Wales - Pembrokeshire? If you are looking for accommodation near Tenby (South Beach), camping, hotels and holiday cottages in Wales - Pembrokeshire, consider staying in Pembroke which is 15 km (9 miles) away. Other places in and around Wales - Pembrokeshire where you can find information about places to rent, and car hire include Milford Haven which is 23 km (14 miles) away, Carmarthen, Fishguard and Aberporth.

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