Surf Forecasts:
Sumpters surf forecast from 6 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 7AM (local time) - 1.5ft (0.5m), 10s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 13 Aug, 7AM (local time) - 3.5ft (1.0m), 10s period, WSW swell with 193 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 7AM (local time) - 1.5ft (0.5m), 10s period with WSW swell.
Best Forecast Surf Conditions for Sumpters this week:
The surf forecast for Sumpters over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 7AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.1m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sumpters in the next 16 days are 1.0m 10s and forecast to arrive on Thursday (Aug 13) at 7AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Monday (Aug 10) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 12th Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 7AM (Wed 12th Aug) | 1.5ft (0.5m) 10s |
| Most Powerful | 7AM (Thu 13th Aug) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Sumpters over the next 16 days.
The Lowdown
Alright, Rusty here again, this time in feet and knots for you. Let’s run through Sumpters.
Honestly, it’s a grim 16 days. From Thursday the 6th right through to Wednesday morning the 12th, it’s flat and messy. The swell barely pushes 1ft, with a lot of cross-shore and onshore wind making a mess of it. There’s a glassy morning on Saturday the 8th, but the swell is only 0.3ft, so you’re just floating around. The combined energy readings are all weak, well under 100, mostly in the single digits. Nothing happening.
The best window is Thursday morning the 13th. A groundswell from the WSW bumps up to 3ft with a 10-second period, and the energy hits 193 (moderate). The wind goes glassy from the SSW. That’s the cleanest, most surfable moment of the whole outlook. The waves are still just ordinary, but it’s the only real chance for a wave.
After that, it drops off again. Friday the 14th and Saturday the 15th are small and choppy. Monday the 17th has a clean cross-offshore wind from the N, but the swell is only 2ft, so it’s weak. The energy is a low 53. Not worth the drive.
The rest of the run from the 18th onward is more tiny, wind-affected surf. The swell never gets above 3ft, and the winds are often onshore or fresh cross-onshore, especially on the 20th with 19 mph winds making it lumpy.
Sumpters is an inconsistent reef, and this forecast lives up to that. The 13th is the only real stand-out, and it’s just “surfable.” The water temp is about average for the time of year, so no drama there.
This stretch looks more fun for kite surfing than paddle surfing, to be honest. Keep your board waxed, but don’t hold your breath.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Sat afternoon, min 13°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Mon afternoon, min 16°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 6 | WSW 6 | WSW 5 | W 9 | W 9 | W 9 | W 9 | W 9 | SW 7 | WSW 7 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | NW 4 | W 8 | W 10 | WSW 11 | WSW 10 | WSW 9 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 76 | 43 | 9 | 7 | 7 | 6 | 2 | 2 | 13 | 18 | 15 | 4 | 8 | 14 | 4 | 5 | 7 | 24 | 77 | 149 | 169 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-on | cross-on | cross-off | glassy | cross-on | cross-off | cross-off | cross-on | cross-off | glassy | cross-on | cross-off | cross | cross-on | cross-off | on | cross-on | cross |
High Tide | 12:09PM6.87m | 00:38AM6.78m | 1:13PM6.52m | 1:52AM6.45m | 2:35PM6.38m | 3:19AM6.43m | 3:59PM6.64m | 4:38AM6.79m | 5:10PM7.20m | 5:42AM7.35m | 6:08PM7.85m | 6:35AM7.89m | 6:57PM8.42m | ||||||||
Low Tide | 5:45AM1.61m | 6:11PM1.84m | 6:46AM2.01m | 7:22PM2.17m | 8:06AM2.27m | 8:52PM2.25m | 9:36AM2.19m | 10:20PM1.94m | 10:54AM1.77m | 11:30PM1.39m | 11:55AM1.22m | 00:26AM0.80m | 12:45PM0.69m | 1:13AM0.33m | |||||||
 | |  | | | | | | | | | | | | | | |  |  |  | | |
 | 5:47 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — |
 | — | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 16 | 16 | 16 | 16 | 19 | 18 | 20 | 24 | 22 | 24 | 27 | 23 | 21 | 22 | 19 | 20 | 21 | 20 |
Feels °C | 12 | 11 | 12 | 14 | 13 | 14 | 15 | 15 | 15 | 16 | 20 | 18 | 21 | 23 | 20 | 19 | 19 | 17 | 19 | 20 | 22 |
Swell 1 Height (m) Direction Period (s) | W 6 | W 10 | WSW 5 | WSW 5 | W 9 | W 4 | W 4 | W 4 | SW 7 | WSW 7 | SW 12 | WSW 6 | WSW 6 | W 8 | WSW 6 | WSW 6 | WSW 6 | WSW 11 | WSW 10 | WSW 9 | WSW 9 |
| kJ | 76 | 8 | 9 | 4 | 6 | 3 | 1 | 1 | 13 | 18 | 6 | 4 | 8 | 1 | 4 | 4 | 4 | 24 | 77 | 149 | 169 |
Swell 2 Height (m) Direction Period (s) | W 10 | SW 12 | W 10 | W 9 | SW 12 | W 9 | W 9 | SW 8 | — | SW 12 | W 8 | W 8 | W 8 | — | W 8 | W 8 | W 10 | SW 6 | SW 6 | — | — |
| kJ | 2 | 6 | 7 | 7 | 6 | 6 | 2 | 2 | — | 6 | 1 | 1 | 1 | — | 1 | 5 | 7 | 2 | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | SW 13 | — | SW 12 | SW 6 | — | SW 12 | W 8 | W 9 | W 9 | — | — | S 12 | — | W 11 | W 11 | W 10 | — | W 8 | — | — | — |
| kJ | 7 | — | 6 | 1 | — | 5 | 1 | 2 | 2 | — | — | 3 | — | 2 | 2 | 2 | — | 1 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | WSW 6 | — | — | WSW 4 | — | — | — | — | — | WSW 6 | WNW 3 | — | WSW 6 | NW 4 | — | — | — | — | — | WNW 3 |
| kJ | — | 43 | — | — | 7 | — | — | — | — | — | 15 | 2 | — | 14 | 4 | — | — | — | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 196 | 386 | 386 | 364 | 396 | 376 | 356 | 180 | 180 | 356 | 180 | 356 | 196 | 393 | 383 | 389 | 345 | 172 | 82 | 172 | 2 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Sumpters Surf forecast
The above surf forecast table for Sumpters provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sumpters can be found by selecting the local surf guide option on the grey menu. Our Sumpters 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 (Sumpters) 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 Sumpters 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.
Sumpters is 21 km (13 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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