Surf Forecasts:
Mewslade Bay surf forecast from 11 Sep 2026:
- Most powerful swell: Saturday 12 Sep, 10PM (local time) - 6ft (1.9m), 7s period, WSW swell with 369 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 1.9m 7s and forecast to arrive on Saturday (Sep 12) at 10PM. 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 4s period and expected on Wednesday (Sep 16) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Sat 12th Sep) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Right, let’s break this down for the imperial crew. Only one spot is even talking to us over these sixteen days: Mewslade Bay. And I gotta be straight with you—there’s a dry spell from now until about the 22nd of September where you’re not gonna find anything worth the drive. That’s over a week of dead water.
From Friday the 11th through most of the month, the story is the same: strong southwest winds chewing up whatever swell is out there. We’re talking waist to chest-high waves (3 to 6 ft), but with a short period (5-7 seconds) and a constant cross-onshore breeze, it’s a mess. The water is running way warmer than it should be for this time of year, but you won’t be enjoying it because the wind chill will get you.
Now, the one day to circle on your calendar? Saturday the 26th of September. The morning is clean with a light offshore breeze from the NNE, but it’s tiny, barely knee-high (1 ft). The real deal is the afternoon. The wind goes glassy—dead calm, from the east at just 3 mph. A solid 6 ft swell from the WSW arrives, and while the period is short (7 seconds), the energy is decent. The surface will be smooth as a lake. This is classic Mewslade Bay handling a southwest swell with perfect wind. It’s not a beginner spot at that size, but for the crew that knows what they’re doing, it’s the best call of the whole forecast. Just know that crowds can show up here sometimes, so if it’s looking good, don’t sleep on it.
The 22nd and 23rd have a couple of tiny, glassy knee-high days (2 ft), but it’s pretty ordinary. It’s a lean stretch for the area, but stuff can change quick.
Rusty
Short Range ForecastModerate rain (total 11mm), heaviest on Sat night. Very mild (max 19°C on Sun night, min 14°C on Fri night). Winds decreasing (fresh winds from the SW on Sat afternoon, light winds from the WSW by Sun night). | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Mon night. Very mild (max 19°C on Mon afternoon, min 13°C on Tue night). Winds increasing (moderate winds from the SW on Mon afternoon, strong winds from the W by Wed night). | |||||||||||||||||||
Fri 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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 8 | WSW 5 | WSW 7 | WSW 7 | WSW 7 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | WSW 6 | WSW 7 | W 7 | WSW 6 | WNW 7 | W 10 | WSW 5 | W 7 | WSW 7 | W 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 202 | 119 | 106 | 302 | 369 | 178 | 253 | 153 | 227 | 207 | 115 | 135 | 104 | 60 | 161 | 71 | 113 | 286 | 208 | 98 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross | cross-on | on | on | cross-on | on | cross-off | cross | cross-off | cross-off | cross | cross-on | cross | cross | cross |
High Tide | 7:20PM8.77m | 7:40AM8.58m | 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 | |||||||
Low Tide | 1:33AM0.05m | 1:46PM0.09m | 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 | ||||||||
 |  |  | |  | |  | |  | | | | |  | | | | | | | |
 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — |
 | 7:42 | — | — | 7:38 | — | — | 7:37 | — | — | 7:35 | — | — | 7:32 | — | — | 7:30 | — | — | 7:28 | — |
mm | — | — | — | — | 10 | — | — | — | 1 | — | 9 | 2 | — | — | — | — | 3 | — | — | 1 |
Temp °C | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 19 | 18 | 19 | 18 | 16 | 16 | 16 | 14 | 15 | 16 | 15 | 15 | 15 |
Feels °C | 14 | 11 | 12 | 11 | 13 | 17 | 15 | 19 | 17 | 18 | 15 | 12 | 11 | 12 | 8 | 9 | 9 | 8 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 8 | W 8 | — | — | WSW 7 | WSW 10 | — | — | — | WSW 8 | WSW 7 | W 10 | WSW 6 | W 7 | W 10 | W 10 | W 10 | — | W 9 |
| kJ | 202 | 119 | 64 | — | — | 178 | 253 | — | — | — | 24 | 135 | 18 | 60 | 110 | 71 | 73 | 8 | — | 40 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | W 13 | SW 13 | — | — | — | — | W 11 | — | W 10 | W 10 | — | — | — | — | W 9 |
| kJ | — | — | — | — | — | 3 | 7 | — | — | — | — | 2 | — | 48 | 51 | — | — | — | — | 39 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | WSW 5 | WSW 7 | WSW 7 | — | — | WSW 9 | WSW 9 | WSW 8 | WSW 6 | — | W 7 | NNW 4 | WNW 7 | W 6 | WSW 5 | W 7 | WSW 7 | W 6 |
| kJ | — | — | 106 | 302 | 369 | — | — | 153 | 227 | 207 | 115 | — | 104 | 9 | 161 | 45 | 113 | 286 | 208 | 98 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 104 | 139 | 319 | 358 | 0 | 44 | 6 | 124 | 124 | 114 | 155 | 419 | 155 | 10 | 322 | 603 | 900 | 433 | 603 |
Best forecast wave conditions in Wales - Gower | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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Recent Eyeball Surf Reports for Wales - Gower
‘Porth Neigwl: Choppy waves hadn't tidied much (from what I could see in the dark.’
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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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