Surf Forecasts:
Tenby (South Beach) surf forecast from 20 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 7PM (local time) - 5ft (1.6m), 8s period, SW swell with 306 kJ wave energy.
Best Forecast Surf Conditions for Tenby (South Beach) this week:
The most powerful waves expected at Tenby (South Beach) in the next 16 days are 1.6m 8s and forecast to arrive on Wednesday (Aug 26) at 7PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Aug 20) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Wed 26th Aug) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Tenby (South Beach) over the next 16 days.
The Lowdown
Alright, let’s get into it. The outlook for Tenby (South Beach) isn’t what we’d call promising. The 16-day window is a tough one, with long stretches of poor surf conditions and only a single, brief window where things come together. For the most part, you’ll be looking at small, weak, wind-affected waves, and the consistency is just not there.
The first recommendation doesn’t appear until Saturday, August 29th, which means we’ve got a big gap of over a week with no quality surf. The water temperature is sitting at 67°F—that’s much warmer than normal for this time of year, a real anomaly of 5°F above the average. Feels more like a summer bath than a typical Welsh surf session.
The one standout is the morning of Saturday, August 29th. The wind goes glassy, with a NNE breeze at just 3 mph, and the swell from the WSW comes in at 8 ft. The period is 9 seconds, so it’s a short-period groundswell, but combined energy hits 969 (moderate to strong). This is a setup with some punch, but that 8 ft on a beach break will be pushing it for beginners. It’s one for the experienced crew, and the glassy conditions will make it clean. Expect some size and power, but also know that it’s a short window.
The afternoon of the same day sees the swell drop to 6 ft and the wind turns cross-offshore from the WNW, still clean but a step down in quality. The rest of the forecast is a write-off, with small, messy, or onshore conditions ruling the roost. The only real moment to grab is that Saturday morning.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Thu morning, min 12°C on Thu night). Winds decreasing (fresh winds from the NNW on Thu afternoon, calm by Sat morning). | Days 4-6 Weather SummarySome drizzle, heaviest during Tue night. Warm (max 24°C on Mon afternoon, min 15°C on Sun morning). Winds increasing (light winds from the SW on Sun afternoon, fresh winds from the SE by Tue afternoon). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | W 7 | W 7 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | SSW 15 | W 10 | SSW 15 | SSW 14 | SW 14 | SW 10 | SSW 14 | E 4 | ESE 4 | ESE 4 | ESE 4 | SSW 4 | SSW 7 | SW 8 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 311 | 223 | 135 | 53 | 22 | 24 | 21 | 28 | 21 | 20 | 29 | 24 | 19 | 18 | 24 | 41 | 9 | 27 | 297 | 292 | 132 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | on |
High Tide | 11:58AM5.96m | 00:25AM5.67m | 12:55PM5.47m | 1:34AM5.23m | 2:19PM5.20m | 3:09AM5.13m | 3:52PM5.33m | 4:31AM5.41m | 4:59PM5.77m | 5:26AM5.88m | 5:46PM6.31m | 6:07AM6.39m | 6:24PM6.85m | ||||||||
Low Tide | 6:07PM2.32m | 6:35AM2.60m | 7:13PM2.78m | 7:55AM2.95m | 8:51PM2.96m | 9:36AM2.93m | 10:23PM2.72m | 10:51AM2.55m | 11:22PM2.26m | 11:40AM2.05m | 00:05AM1.75m | 12:19PM1.54m | 00:41AM1.25m | ||||||||
 |  |  |  | | | | |  | | | | | | | | |  |  |  | | |
 | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — |
 | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:19 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 10 | 1 |
Temp °C | 18 | 17 | 14 | 15 | 16 | 15 | 18 | 18 | 15 | 18 | 20 | 18 | 20 | 24 | 20 | 20 | 22 | 19 | 20 | 17 | 17 |
Feels °C | 13 | 12 | 10 | 11 | 12 | 12 | 17 | 14 | 13 | 15 | 18 | 14 | 15 | 20 | 14 | 15 | 16 | 16 | 17 | 14 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 15 | W 7 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | W 10 | WSW 9 | W 9 | SW 14 | SW 10 | SW 9 | SSW 13 | W 8 | SSW 8 | ESE 4 | SSW 9 | W 9 | SW 8 | SSW 8 |
| kJ | 8 | 223 | 135 | 53 | 22 | 24 | 18 | 28 | 16 | 6 | 29 | 24 | 13 | 18 | 6 | 7 | 9 | 8 | 14 | 292 | 117 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 14 | SSW 14 | SW 13 | SW 13 | SW 13 | SSW 15 | SW 15 | SSW 15 | SSW 14 | W 9 | SSW 14 | SSW 14 | W 9 | SW 13 | W 8 | SSW 5 | SSW 7 | SW 13 | W 8 | WSW 9 |
| kJ | 8 | 8 | 19 | 7 | 7 | 7 | 21 | 8 | 21 | 20 | 6 | 20 | 19 | 6 | 7 | 5 | 2 | 5 | 6 | 20 | 132 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 16 | SW 16 | NW 5 | — | SW 12 | SW 12 | — | — | — | W 9 | SW 9 | SW 9 | SW 13 | SSW 8 | W 8 | — | W 10 | WSW 12 |
| kJ | — | — | — | 10 | 10 | 1 | — | 6 | 6 | — | — | — | 7 | 3 | 3 | 7 | 6 | 6 | — | 18 | 13 |
Wind waves Height (m) Direction Period (s) | W 7 | — | N 4 | NNW 3 | WNW 6 | N 3 | NE 3 | NNW 4 | N 3 | — | — | — | E 3 | E 4 | ESE 4 | ESE 4 | SSW 4 | SSW 4 | SSW 7 | — | — |
| kJ | 311 | — | 13 | 7 | 17 | 5 | 1 | 3 | 1 | — | — | — | 8 | 14 | 24 | 41 | 6 | 27 | 297 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 431 | 339 | 30 | 30 | 157 | 35 | 25 | 122 | 28 | 25 | 159 | 25 | 346 | 329 | 346 | 159 | 155 | 88 | 28 | 67 | 28 |
Best forecast wave conditions in Wales - Pembrokeshire | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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