Surf Forecasts:
Mewslade Bay surf forecast from 14 Sep 2026:
- Most powerful swell: Wednesday 16 Sep, 10AM (local time) - 4.5ft (1.4m), 10s period, W 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 1.4m 10s and forecast to arrive on Wednesday (Sep 16) at 10AM. Winds are predicted to be cross-offshore 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 | 10AM (Wed 16th Sep) | 4.5ft (1.4m) 10s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, Rusty here. Let's take a look at what's cooking for Mewslade Bay over the next couple of weeks.
Right, so the honest truth is, this stretch is looking pretty grim overall. We've got a long, long wait for anything half-decent. The water is a balmy 65° right now, which is much warmer than normal for this time of year – a good 4° above average, so you might not even need the thickest wetsuit if you're brave enough to paddle out in it, but the conditions just aren't playing ball.
The first week is a write-off. From the 14th right through to the 22nd, it's a constant struggle. We've got onshore winds from the SW and WSW most days, kicking up a chop. The swell is small to moderate, with combined energy readings mostly between 105 and 323 (moderate energy), but it's so wind-affected it's pretty much unrideable. The 14th and 15th are a complete washout with cross-onshore slop. By the 17th, there's a 6ft W swell with a short 7-second period, but the winds just ruin it. There's a glimmer on the 16th morning with a clean-looking 3ft W swell and a better 10-second period (303 energy), but it's scored as marginal.
You're looking at a solid week of disappointment until we finally get a sniff of something better. The first real standout of the entire outlook lands on Wednesday the 23rd in the morning. We get light offshore winds from the north, swinging it glassy clean. The swell is small – just 3ft from the WSW with a decent 9-second period and 108 energy – but that offshore wind will make it smooth. For the patient surfer, this will be your best bet for some clean, small waves. It'll be perfect for a longboard or a fish.
After that, we're back into the doldrums for the rest of the window. The swell gets tiny and the winds turn onshore or cross-shore again. There's a little bump in southern swell on the 21st and 22nd, and a very long-period 18-second pulse on the 24th afternoon, but they are all small or blown out.
So yeah, the outlook is bleak for the most part. Lock in the morning of September 23rd for your session, but don't get your hopes up for much else.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Very mild (max 18°C on Mon morning, min 14°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Sat night, min 14°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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 9 | WSW 6 | W 7 | W 7 | WSW 7 | W 10 | WSW 10 | WSW 10 | W 7 | WSW 7 | W 7 | WSW 7 | WSW 7 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 7 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 227 | 181 | 123 | 266 | 247 | 121 | 369 | 136 | 255 | 226 | 186 | 181 | 147 | 128 | 200 | 177 | 167 | 110 | 60 | 64 | 52 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross | cross | cross-off | cross-off | cross | cross-on | cross | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy |
High Tide | 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 | 12:03PM5.79m | 00:42AM5.44m | 1:27PM5.41m | 2:25AM5.26m | ||||||||
Low Tide | 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 | 5:38AM2.77m | 6:18PM2.98m | 6:58AM3.22m | 8:06PM3.24m | ||||||||
 |  |  | | |  | |  | |  | | | | | | | | | | |  | |
 | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — |
 | — | 7:35 | — | — | 7:32 | — | — | 7:30 | — | — | 7:28 | — | — | 7:25 | — | — | 7:22 | — | — | 7:21 | — |
mm | 1 | — | 3 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 18 | 15 | 16 | 16 | 15 | 15 | 16 | 15 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 18 | 18 | 18 | 17 |
Feels °C | 17 | 16 | 15 | 9 | 10 | 12 | 11 | 9 | 11 | 10 | 9 | 10 | 12 | 11 | 14 | 14 | 14 | 17 | 17 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | — | S 12 | WSW 8 | — | — | WSW 7 | W 10 | WSW 10 | W 10 | W 10 | — | W 9 | WSW 7 | W 12 | W 12 | SW 16 | W 16 | WSW 9 | W 9 | WSW 7 | WSW 7 |
| kJ | — | 3 | 23 | — | — | 121 | 369 | 136 | 200 | 17 | — | 45 | 147 | 28 | 3 | 10 | 5 | 29 | 38 | 64 | 52 |
Swell 2 Height (m) Direction Period (s) | — | — | W 12 | — | — | W 8 | — | — | — | — | — | W 17 | W 13 | — | — | W 16 | — | — | SW 14 | W 15 | W 14 |
| kJ | — | — | 3 | — | — | 51 | — | — | — | — | — | 6 | 3 | — | — | 5 | — | — | 8 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | W 14 | SW 14 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 8 | — |
Wind waves Height (m) Direction Period (s) | WSW 9 | WSW 9 | WSW 6 | W 7 | W 7 | NW 4 | NNW 4 | W 6 | WSW 10 | W 7 | WSW 7 | W 7 | — | WSW 7 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | — | — |
| kJ | 227 | 181 | 123 | 266 | 247 | 10 | 10 | 80 | 255 | 226 | 186 | 181 | — | 128 | 200 | 177 | 167 | 110 | 60 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 124 | 124 | 124 | 358 | 358 | 31 | 10 | 322 | 322 | 425 | 358 | 31 | 0 | 286 | 124 | 124 | 124 | 68 | 124 | 124 | 4 |
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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