Surf Forecasts:
Llangennith surf forecast from 16 Sep 2026:
- Best quality surf: Sunday 20 Sep, 10AM (local time) - 3.5ft (1.0m), 9s period, WSW swell with glassy winds.
- Most powerful swell: Saturday 19 Sep, 1PM (local time) - 8ft (2.4m), 8s period, WSW swell with 640 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 10AM (local time) - 3.5ft (1.0m), 9s period with WSW swell.
Best Forecast Surf Conditions for Llangennith this week:
The surf forecast for Llangennith over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 20) at 10AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.1m and 14s. Another secondary swell of 0.2m and 3s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Llangennith in the next 16 days are 2.4m 8s and forecast to arrive on Saturday (Sep 19) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Wednesday (Sep 23) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 20th Sep) | 3.5ft (1.0m) 9s |
| Best Surf | 10AM (Sun 20th Sep) | 3.5ft (1.0m) 9s |
| Most Powerful | 1PM (Sat 19th Sep) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Llangennith over the next 16 days.
The Lowdown
Alright, let’s break down the outlook for Llangennith.
Honestly, the first week and a bit is a total bust. There’s a massive dry spell from right now all the way until the morning of Sunday, September 20th. The wind is constantly onshore or side-onshore, and the surf is just junk. Even when we get some size, like Saturday the 19th with 8ft from the west-southwest, the wind is fresh and lumpy. It’s no good. For the first several days, just save the gas.
The morning of Sunday, September 20th is our first real chance. The wind goes glassy from the north, and the west-southwest swell drops to a clean 3ft. The energy is moderate (202), and with the glassy conditions, it should look pretty. It’s small though, so only the beginners will get much out of it.
The rest of that week is tiny and clean but mostly flat. Monday the 21st is a glassy 2ft, but it’s gutless. Tuesday the 22nd has a tiny 2ft wave with a longer 11-second period in the afternoon and glassy conditions, but it’s still just knee-high.
Now, the one to really wait for is Wednesday, September 30th. The morning shows a solid 8ft west-southwest swell with a clean offshore breeze out of the east-northeast. The wave energy is cranking at 737. That’s a lot of power. This is strictly for the experts, as it’s well overhead and pushing 8ft. The afternoon cleans up with a light cross-offshore wind and still 7ft of swell. This is the best window in the whole 16-day forecast.
The start of October looks promising again, with Thursday the 1st showing a clean 4ft swell from the southwest, but we’re over a week out, so don’t book the day off just yet.
Outside of that, it’s mostly tiny surf. The water temp is about what you’d expect for this time of year.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed night. Very mild (max 16°C on Tue night, min 14°C on Tue night). Winds increasing (light winds from the NW on Tue night, strong winds from the SW by Fri afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Very mild (max 18°C on Sat afternoon, min 14°C on Sat night). Winds decreasing (fresh winds from the WSW on Fri night, calm by Sun night). | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
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 10 | W 10 | WSW 6 | W 7 | W 7 | W 7 | WSW 7 | WSW 6 | WSW 7 | WSW 8 | WSW 8 | WSW 7 | WSW 9 | WSW 9 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 10 | W 11 | W 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 384 | 302 | 148 | 348 | 303 | 255 | 191 | 247 | 498 | 576 | 585 | 163 | 189 | 106 | 38 | 38 | 27 | 16 | 31 | 93 | 121 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | cross-on | on | cross-on | cross-on | cross-on | on | on | glassy | on | glassy | glassy | on | glassy | cross-off | glassy | off |
High Tide | 9:57AM7.56m | 10:15PM7.24m | 10:31AM6.98m | 10:52PM6.59m | 11:11AM6.37m | 11:36PM5.96m | 12:03PM5.79m | 00:42AM5.44m | 1:27PM5.41m | 2:25AM5.26m | 3:14PM5.52m | 3:58AM5.60m | 4:26PM6.04m | ||||||||
Low Tide | 3:58PM1.23m | 4:14AM1.59m | 4:33PM1.81m | 4:50AM2.19m | 5:15PM2.43m | 5:38AM2.77m | 6:18PM2.98m | 6:58AM3.22m | 8:06PM3.24m | 8:54AM3.23m | 9:47PM2.97m | 10:15AM2.80m | 10:48PM2.43m | ||||||||
 | |  | | |  |  |  |  | | |  | |  | | | | | | | | |
 | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — |
 | — | 7:30 | — | — | 7:28 | — | — | 7:25 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:15 | — |
mm | — | — | 3 | — | — | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 16 | 15 | 16 | 15 | 16 | 16 | 17 | 17 | 18 | 16 | 15 | 16 | 16 | 16 | 18 | 18 | 19 | 21 | 21 |
Feels °C | 12 | 10 | 10 | 10 | 10 | 10 | 11 | 10 | 13 | 13 | 15 | 15 | 13 | 14 | 16 | 16 | 18 | 19 | 19 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | W 10 | — | — | — | — | W 9 | — | W 12 | W 12 | — | SW 16 | WSW 7 | WSW 9 | WSW 9 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 10 | W 11 | W 10 |
| kJ | 384 | — | — | — | — | 85 | — | 27 | 3 | — | 10 | 163 | 189 | 106 | 38 | 38 | 27 | 16 | 31 | 93 | 108 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 9 | W 14 | SW 14 | WSW 9 | SW 13 | SW 13 | S 13 | W 12 | WSW 18 | W 15 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 85 | 4 | 8 | 17 | 7 | 7 | 3 | 12 | 60 | 121 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 14 | SW 14 | — | S 13 | — | — | — | W 20 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 4 | 8 | — | 4 | — | — | — | 7 | — | — |
Wind waves Height (m) Direction Period (s) | — | W 10 | WSW 6 | W 7 | W 7 | W 7 | WSW 7 | WSW 6 | WSW 7 | WSW 8 | WSW 8 | — | N 3 | — | — | — | — | — | — | — | — |
| kJ | — | 302 | 148 | 348 | 303 | 255 | 191 | 247 | 498 | 576 | 585 | — | 1 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 243 | 325 | 423 | 325 | 12 | 369 | 314 | 314 | 258 | 138 | 4 | 0 | 20 | 0 | 0 | 151 | 121 | 0 | 0 | 0 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Llangennith Surf forecast
The above surf forecast table for Llangennith provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Llangennith can be found by selecting the local surf guide option on the grey menu. Our Llangennith 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 (Llangennith) 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 Llangennith 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.
Llangennith is 24 km (15 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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