Surf Forecasts:
Sumpters surf forecast from 20 Sep 2026:
- Best quality surf: Wednesday 23 Sep, 1AM (local time) - 2.5ft (0.8m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Sunday 27 Sep, 10PM (local time) - 4.5ft (1.4m), 10s period, WSW swell with 394 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 1AM (local time) - 2ft (0.6m), 7s 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 Monday (Sep 21) at 1AM. The primary swell is predicted to be 0.6m and 7s period with a secondary swell of 0.3m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sumpters in the next 16 days are 1.4m 10s and forecast to arrive on Sunday (Sep 27) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Thursday (Sep 24) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 21st Sep) | 2ft (0.6m) 7s |
| Best Surf | 1AM (Wed 23rd Sep) | 2.5ft (0.8m) 11s |
| Most Powerful | 10PM (Sun 27th Sep) | 4.5ft (1.4m) 10s |
Table - best surf conditions forecast for Sumpters over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 19°C on Tue afternoon, min 14°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Fri afternoon, min 11°C on Wed night). Winds decreasing (fresh winds from the ESE on Thu morning, calm by Fri afternoon). | |||||||||||||||||||
Sun 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | ||||||||||||||
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 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 8 | W 12 | W 11 | W 14 | W 13 | W 12 | WSW 11 | W 11 | WSW 10 | W 12 | W 11 | W 11 | WSW 11 | WSW 10 | WSW 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 86 | 40 | 27 | 27 | 17 | 29 | 98 | 151 | 146 | 125 | 103 | 23 | 20 | 32 | 76 | 157 | 86 | 150 | 180 | 176 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | on | cross-on | cross | cross-off | cross-on | cross-off | cross | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:25AM5.26m | 3:14PM5.52m | 3:58AM5.60m | 4:26PM6.04m | 4:54AM6.18m | 5:13PM6.68m | 5:35AM6.82m | 5:51PM7.33m | 6:10AM7.43m | 6:26PM7.92m | 6:44AM7.97m | 6:59PM8.39m | ||||||||
Low Tide | 8:06PM3.24m | 8:54AM3.23m | 9:47PM2.97m | 10:15AM2.80m | 10:48PM2.43m | 11:05AM2.21m | 11:30PM1.81m | 11:43AM1.61m | 00:05AM1.22m | 12:17PM1.05m | 00:37AM0.70m | 12:49PM0.58m | 1:08AM0.30m | |||||||
 |  |  | |  | | | | | | | | | | | | | | | | |
 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — |
 | 7:21 | — | — | 7:17 | — | — | 7:15 | — | — | 7:14 | — | — | 7:10 | — | — | 7:08 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 16 | 18 | 18 | 18 | 19 | 19 | 17 | 15 | 14 | 15 | 18 | 15 | 18 | 21 | 17 | 15 | 16 | 15 |
Feels °C | 12 | 14 | 16 | 18 | 18 | 18 | 18 | 19 | 16 | 10 | 12 | 12 | 15 | 12 | 14 | 20 | 15 | 11 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 8 | W 12 | W 11 | W 9 | W 13 | W 12 | WSW 8 | WSW 8 | WSW 10 | W 12 | W 11 | WSW 8 | WSW 11 | SW 14 | WSW 10 |
| kJ | 86 | 40 | 27 | 27 | 17 | 29 | 98 | 151 | 85 | 125 | 103 | 22 | 11 | 32 | 76 | 157 | 68 | 150 | 8 | 35 |
Swell 2 Height (m) Direction Period (s) | S 14 | WSW 9 | W 9 | W 13 | W 13 | — | W 20 | W 16 | W 14 | W 8 | N 3 | WSW 11 | W 11 | SW 4 | SSW 4 | WSW 16 | W 11 | SW 15 | — | SW 15 |
| kJ | 4 | 17 | 15 | 3 | 3 | — | 7 | 129 | 146 | 33 | 1 | 23 | 20 | 1 | 2 | 52 | 86 | 8 | — | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | S 13 | — | — | — | — | — | W 11 | — | — | — | — | — | W 16 | SE 3 | WSW 15 | — | — | — |
| kJ | — | — | 3 | — | — | — | — | — | 9 | — | — | — | — | — | 5 | 1 | 22 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NW 3 | — | ESE 3 | SE 3 | SE 3 | SE 3 | SW 3 | — | W 3 | WSW 10 | WSW 6 |
| kJ | — | — | — | — | — | — | — | — | — | 4 | — | 8 | 5 | 2 | 5 | 1 | — | 3 | 180 | 176 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 6 | 0 | 86 | 179 | 77 | 54 | 6 | 0 | 2 | 131 | 0 | 40 | 113 | 158 | 32 | 7 | 11 | 186 | 318 | 131 |
Best forecast wave conditions in Wales - Gower | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sumpters surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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