Surf Forecasts:
Mewslade Bay surf forecast from 1 Sep 2026:
- Best quality surf: Saturday 5 Sep, 1AM (local time) - 3.5ft (1.0m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 7AM (local time) - 10ft (3.0m), 9s period, WSW swell with 1,232 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 1AM (local time) - 3.5ft (1.0m), 8s period with WSW swell.
Best Forecast Surf Conditions for Mewslade Bay this week:
The surf forecast for Mewslade Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 05) at 1AM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.1m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mewslade Bay in the next 16 days are 3.0m 9s and forecast to arrive on Tuesday (Sep 08) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Sep 07) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sat 5th Sep) | 3.5ft (1.0m) 8s |
| Best Surf | 1AM (Sat 5th Sep) | 3.5ft (1.0m) 8s |
| Most Powerful | 7AM (Tue 8th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for Mewslade Bay over the next couple of weeks.
Honestly, it’s a pretty grim run for the most part. The first week and a half or so is a real struggle, with strong cross-onshore winds, lumpy chop, and generally poor conditions. The water is sitting at 67°F which is much warmer than normal for this time of year – a full 6°F above average, which is very unusual.
We’ve got a bit of a window late on Friday morning, the 4th of September. The swell is coming from the WSW at 6ft, period around 8 seconds, with a moderate combined wave energy of 405. The wind is a light cross-offshore from the NW, so things should be clean. It’s marginal, but it’s the first real chance of a surfable wave.
Then, early on Saturday the 5th, we get a brief moment of glassy conditions. The wind is dead calm, swell is small at 3ft from the WSW, period 9 seconds, and wave energy is weak at 113. It’s small and ordinary, but at least it’s clean. Not a standout, but a moment of peace.
The 14th of September, a Monday afternoon, is the best bet in the whole outlook. The wind goes light easterly, giving us a cross-offshore breeze, and the swell is 5ft from the WSW at 7 seconds. The combined energy is moderate at 252. The guidance says "expect good surf conditions," and with the clean conditions, this is the one to mark in your calendar. It’s a good size for most, not too big, not too small. The wind will be light and clean, and the waves should be surfable. Crowds can be an issue here sometimes, so be prepared for a few others in the water.
The rest of the run is a write-off, with onshore winds, choppy seas, and tiny swell. We’re looking at a long stretch of poor surf, with only that Monday afternoon on the 14th offering something genuinely decent. After that, it fades back into nothing.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Tue morning. Very mild (max 19°C on Wed afternoon, min 16°C on Tue night). Winds increasing (moderate winds from the WSW on Tue morning, strong winds from the SW by Thu night). | Days 4-6 Weather SummarySome drizzle, heaviest during Fri morning. Very mild (max 18°C on Sun afternoon, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | WSW 9 | WSW 5 | WSW 5 | SW 6 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 10 | WSW 9 | WSW 9 | WSW 6 | SW 5 | WSW 9 | WSW 12 | WSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 137 | 54 | 42 | 120 | 372 | 319 | 310 | 242 | 231 | 397 | 210 | 137 | 106 | 96 | 65 | 16 | 24 | 52 | 158 | 683 | 365 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | on | cross-off | cross | cross-off | glassy | cross-on | glassy | cross | on | on | cross-on | cross-on | cross-on |
High Tide | 9:48PM8.23m | 10:08AM7.90m | 10:28PM7.78m | 10:51AM7.44m | 11:16PM7.20m | 11:43AM6.88m | 00:16AM6.58m | 12:52PM6.37m | 1:38AM6.14m | 2:24PM6.19m | 3:16AM6.18m | 3:56PM6.54m | |||||||||
Low Tide | 3:28PM0.51m | 3:49AM0.66m | 4:06PM0.85m | 4:28AM1.10m | 4:49PM1.33m | 5:16AM1.67m | 5:45PM1.90m | 6:20AM2.24m | 7:06PM2.39m | 7:55AM2.58m | 8:54PM2.45m | 9:38AM2.39m | 10:25PM1.99m | ||||||||
 |  |  |  | |  |  | |  | | |  | | | |  | | | | |  | |
 | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — |
 | — | 8:04 | — | — | 8:01 | — | — | 8:00 | — | — | 7:58 | — | — | 7:54 | — | — | 7:52 | — | — | 7:51 | — |
mm | 1 | 1 | 1 | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 17 | 17 | 19 | 18 | 18 | 18 | 19 | 16 | 17 | 17 | 14 | 15 | 15 | 17 | 18 | 18 | 18 | 18 | 16 |
Feels °C | 14 | 12 | 14 | 12 | 15 | 15 | 16 | 15 | 14 | 12 | 13 | 13 | 12 | 13 | 14 | 15 | 17 | 17 | 16 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | — | SW 18 | W 8 | SW 16 | — | SW 15 | SW 15 | SW 15 | — | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 10 | WSW 9 | WSW 6 | WSW 6 | WSW 8 | WSW 9 | W 12 | — |
| kJ | — | 12 | 11 | 10 | — | 9 | 9 | 9 | — | 397 | 210 | 137 | 106 | 96 | 65 | 15 | 24 | 14 | 158 | 615 | — |
Swell 2 Height (m) Direction Period (s) | — | — | SW 16 | W 16 | — | — | — | — | — | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 9 | WSW 9 | SW 12 | WSW 13 | — | — |
| kJ | — | — | 10 | 5 | — | — | — | — | — | 8 | 8 | 8 | 7 | 7 | 7 | 16 | 15 | 6 | 95 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | W 16 | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 13 | — | — | — | — |
| kJ | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 6 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 9 | WSW 5 | WSW 5 | SW 6 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 6 | — | — | NW 3 | — | — | — | SE 3 | SE 3 | SW 5 | NNW 3 | WSW 12 | WSW 6 |
| kJ | 137 | 54 | 42 | 120 | 372 | 319 | 310 | 242 | 231 | — | — | 2 | — | — | — | 4 | 2 | 52 | 4 | 683 | 365 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 124 | 139 | 95 | 415 | 322 | 139 | 124 | 311 | 358 | 10 | 141 | 0 | 0 | 55 | 0 | 4 | 261 | 126 | 124 | 124 | 135 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Mewslade Bay Surf forecast
The above surf forecast table for Mewslade Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mewslade Bay can be found by selecting the local surf guide option on the grey menu. Our Mewslade Bay 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 (Mewslade Bay) 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 Mewslade Bay 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.
Mewslade Bay is 25 km (16 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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