
Surf Forecasts:
Mewslade Bay surf forecast from 12 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 4AM (local time) - 7.5ft (2.3m), 7s period, WSW swell with 573 kJ wave energy.
Best Forecast Surf Conditions for Mewslade Bay this week:
The most powerful waves expected at Mewslade Bay in the next 16 days are 2.3m 7s and forecast to arrive on Saturday (Sep 19) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Sep 16) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Sat 19th Sep) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, this is Rusty. Let me level with you about the next couple of weeks. It’s a tough run for Mewslade Bay.
The trouble starts right away and doesn’t let up. There's a lot of swell on the way, but the wind is all wrong for most of it. We’ve got a strong, messy cross-onshore wind from the southwest for the first few days, which just kills the shape. The water’s sitting at 65°F, which is a solid 5°F warmer than usual, so at least you can ditch the thick wetsuit. But the surf? Not good.
We start on Saturday the 12th with a 7ft west-southwest swell, but it’s a short-period 7 seconds and the wind is a strong 25 mph from the southwest, creating a choppy, blown-out mess. The wave energy is moderate (462). That's a no-go. The wind swings a bit, but stays onshore or cross-shore right through until the middle of the next week. There’s a moment early on Wednesday the 16th where a 5ft west swell with a clean cross-offshore wind from the northwest shows up. The combined energy is moderate (620) and it looks clean, but the period is only 8 seconds, so it’ll be a bit lumpy and sectiony. It’s the only sniff of a halfway decent wave in the first week, but it’s marginal. For the rest of that week, we’re looking at small, choppy waves or bigger, blown-out ones. It's a long stretch of poor conditions.
Then things get even smaller. From Monday the 21st, the swell really drops off. On the morning of the 21st, the wind goes glassy and the 4ft west-southwest swell (109 energy) becomes surfable, but it’s pretty weak. After that, the wave heights barely hit 1ft for days. Late on the 23rd, the wind goes calm and glassy, but the swell is tiny at 0.7ft and barely 4 energy – a flat, oily sea. The rest of the window looks just as small, with nothing that would get a surfer out of bed.
So here’s the short version: if you absolutely have to get wet, Wednesday morning, the 16th, has the best chance of a clean, rideable wave, with that cross-offshore wind and a 5ft swell. That’s your only real standout, and even then it’s not pumping. The whole second week is basically a flat spell. It’s a bummer, but sometimes the ocean takes a breather.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sat night. Very mild (max 19°C on Mon afternoon, min 16°C on Mon night). Winds decreasing (fresh winds from the SW on Sat afternoon, light winds from the SW by Sun night). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Very mild (max 16°C on Tue afternoon, min 13°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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 | W 8 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 9 | WSW 6 | WSW 7 | W 7 | WSW 8 | W 8 | W 10 | W 10 | W 6 | W 7 | W 6 | W 6 | WSW 5 | WSW 7 |
Wave Graph | ||||||||||||||||||||
462 | 305 | 386 | 248 | 185 | 180 | 168 | 90 | 161 | 157 | 192 | 360 | 347 | 245 | 148 | 152 | 54 | 81 | 80 | 525 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | cross | cross | cross-off | cross-off | cross | cross-on | cross-off | cross | cross | cross | cross-on | on |
High Tide | 7:57PM8.86m | 8:16AM8.60m | 8:33PM8.72m | 8:50AM8.41m | 9:07PM8.36m | 9:23AM8.05m | 9:41PM7.85m | 9:57AM7.56m | 10:15PM7.24m | 10:31AM6.98m | 10:52PM6.59m | 11:11AM6.37m | 11:36PM5.96m | |||||||
Low Tide | 2:07AM0.02m | 2:20PM0.12m | 2:39AM0.20m | 2:53PM0.34m | 3:10AM0.55m | 3:25PM0.72m | 3:41AM1.03m | 3:58PM1.23m | 4:14AM1.59m | 4:33PM1.81m | 4:50AM2.19m | 5:15PM2.43m | ||||||||
— | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | |
7:38 | — | — | 7:37 | — | — | 7:35 | — | — | 7:32 | — | — | 7:30 | — | — | 7:28 | — | — | 7:25 | — | |
mm | — | 9 | — | — | 2 | — | — | 1 | — | — | — | — | — | 2 | 1 | — | — | — | — | 4 |
Temp °C | 17 | 18 | 18 | 18 | 18 | 17 | 19 | 19 | 16 | 16 | 16 | 15 | 15 | 16 | 15 | 15 | 15 | 15 | 16 | 18 |
Feels °C | 12 | 17 | 18 | 17 | 18 | 16 | 18 | 17 | 12 | 10 | 11 | 10 | 9 | 11 | 10 | 9 | 9 | 10 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | — | W 8 | WSW 7 | SW 13 | WSW 9 | — | S 12 | WSW 8 | WSW 7 | — | WSW 8 | W 8 | — | W 10 | W 10 | W 10 | WSW 7 | W 9 | W 13 | W 12 |
— | 253 | 176 | 7 | 185 | — | 3 | 24 | 161 | — | 192 | 235 | — | 196 | 17 | 17 | 54 | 16 | 14 | 12 | |
Swell 2 Height (m) Direction Period (s) | — | — | W 10 | — | — | — | — | — | W 11 | — | — | WSW 11 | — | — | — | — | WSW 9 | W 14 | — | — |
— | — | 68 | — | — | — | — | — | 2 | — | — | 25 | — | — | — | — | 29 | 14 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | W 14 | — | — |
— | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | 14 | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 7 | WSW 7 | WSW 10 | WSW 10 | — | WSW 9 | WSW 9 | WSW 6 | — | W 7 | NW 3 | W 8 | W 10 | W 10 | W 6 | W 7 | W 6 | W 6 | WSW 5 | WSW 7 |
462 | 305 | 386 | 248 | — | 180 | 168 | 90 | — | 157 | 5 | 360 | 347 | 245 | 148 | 152 | 49 | 81 | 80 | 525 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 311 | 124 | 124 | 31 | 95 | 124 | 124 | 117 | 141 | 358 | 16 | 10 | 44 | 364 | 358 | 358 | 433 | 365 | 311 | 603 |
Best forecast wave conditions in Wales - Gower | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Live Wind Speed (km/h)
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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.











