Surf Forecasts:
Tenby (South Beach) surf forecast from 15 Aug 2026:
- Best quality surf: Thursday 20 Aug, 4AM (local time) - 5ft (1.6m), 7s period, W swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 4AM (local time) - 5ft (1.6m), 7s period, W swell with 247 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 4AM (local time) - 5ft (1.6m), 7s period with W 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 1.6m and 7s 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 1.6m 7s and forecast to arrive on Thursday (Aug 20) at 4AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Wednesday (Aug 19) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 20th Aug) | 5ft (1.6m) 7s |
| Best Surf | 4AM (Thu 20th Aug) | 5ft (1.6m) 7s |
| Most Powerful | 4AM (Thu 20th Aug) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Tenby (South Beach) over the next 16 days.
The Lowdown
Alright, let’s get real about the next couple of weeks. I’ve been staring at the charts for Tenby and, honestly, it’s a tough stretch. We’ve got a solid run of days where the surf is just not doing us any favors. It’s flat, it’s tiny, and the winds are mostly messing with the little bit of energy that’s out there.
The first week is a write-off. We’re looking at a lot of knee-high slop and cross-off winds that are keeping the surface clean but there’s just nothing on the face. The best of a bad bunch looks like Tuesday the 18th with a small pulse of 4ft at 6 seconds. The offshore wind will make it look tidy, but it’s short period and weak, with combined energy of just 146. It’ll be a fun little wave for the logs but nothing to get excited about.
Thursday the 20th has a bit more size at 5ft but the period is still short. The wind looks okay in the morning. It’s another close-out risk with that weak energy (192). We’re just not getting the groundswell to push in.
The water temp is 67°F, which is about 5°F warmer than usual for this time of year. It’s noticeably warm, so the spring suit is sitting in the car.
As we move into the second week, the swell runs out of puff completely. From the 22nd through to the 30th, we’re mostly looking at ankle-biters under 2ft. There’s a tiny bit of hope on the 27th with a 2ft west swell and offshore winds, but that’s still super weak.
Honestly, if you’re after waves, this isn’t the fortnight for it. But the water’s warm, the beach is as sheltered as they come, and it might be a better time to grab a paddleboard or just enjoy a swim.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Sun afternoon, min 14°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Tue afternoon, min 13°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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) | WSW 8 | W 8 | WSW 7 | WSW 7 | WSW 7 | W 5 | W 7 | WSW 7 | W 6 | SW 17 | WSW 6 | W 6 | SW 16 | W 7 | W 7 | W 6 | WSW 9 | W 9 | W 9 | WSW 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 44 | 29 | 18 | 10 | 10 | 27 | 12 | 52 | 135 | 11 | 64 | 95 | 10 | 206 | 176 | 73 | 82 | 78 | 40 | 25 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | off | off | cross-off | cross-off | off | cross-off | cross | cross-off | cross-off | cross-off |
High Tide | 9:01PM8.31m | 9:21AM7.86m | 9:39PM7.98m | 9:58AM7.52m | 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 | |||||||
Low Tide | 3:17AM0.13m | 3:30PM0.33m | 3:53AM0.49m | 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 | ||||||||
 |  |  | | | | | | | | | | | | | |  | | | | |
 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — |
 | 8:42 | — | — | 8:39 | — | — | 8:37 | — | — | 8:36 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 15 | 19 | 20 | 17 | 20 | 19 | 18 | 20 | 20 | 17 | 18 | 18 | 17 | 19 | 19 | 15 | 19 | 19 | 15 |
Feels °C | 14 | 12 | 16 | 16 | 17 | 17 | 16 | 16 | 16 | 16 | 14 | 12 | 12 | 14 | 16 | 15 | 13 | 17 | 15 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | W 8 | WSW 7 | WSW 7 | WSW 7 | W 5 | W 7 | SW 16 | W 6 | SW 17 | WSW 6 | SW 16 | SW 16 | SSW 16 | W 7 | WSW 6 | WSW 9 | W 9 | W 9 | WSW 9 |
| kJ | 44 | 29 | 18 | 10 | 10 | 27 | 10 | 11 | 135 | 11 | 64 | 10 | 10 | 24 | 176 | 66 | 82 | 78 | 40 | 25 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | S 18 | W 7 | SW 18 | — | SW 16 | — | SW 17 | W 10 | SW 16 | — | SW 15 | W 9 | SSW 14 | SW 13 | SW 13 | SW 13 |
| kJ | — | — | — | — | 6 | 4 | 12 | — | 11 | — | 12 | 2 | 10 | — | 8 | 39 | 19 | 7 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | S 12 | — | — | SW 18 | — | — | — | — | — | — | — | — | SW 15 | SSW 14 | — | SW 16 | SW 16 | SW 16 |
| kJ | — | — | 3 | — | — | 12 | — | — | — | — | — | — | — | — | 8 | 21 | — | 10 | 10 | 10 |
Wind waves Height (m) Direction Period (s) | NNW 3 | NNW 3 | — | W 5 | WSW 4 | — | W 5 | WSW 7 | — | W 6 | — | W 6 | W 6 | W 7 | — | W 6 | — | NNW 5 | NW 3 | NNW 3 |
| kJ | 8 | 3 | — | 7 | 5 | — | 19 | 52 | — | 73 | — | 95 | 89 | 206 | — | 73 | — | 5 | 3 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 301 | 301 | 322 | 372 | 183 | 271 | 339 | 426 | 271 | 408 | 49 | 157 | 339 | 364 | 30 | 317 | 8 | 26 | 173 | 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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