Surf Forecasts:
Mewslade Bay surf forecast from 25 Aug 2026:
- Most powerful swell: Tuesday 1 Sep, 7PM (local time) - 10ft (3.0m), 8s period, WSW swell with 1,043 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 3.0m 8s and forecast to arrive on Tuesday (Sep 01) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 25) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Tue 1st Sep) | 10ft (3.0m) 8s |
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 the outlook for Mewslade Bay. I’ve got to be straight with you – this is a tough one. The whole 16-day window is a bit of a write-off for decent surf. There are no good options on offer, and the first hint of anything even worth a mention doesn't show up until Saturday, 5th September, and even then, it’s marginal.
The problem is persistent wind. For the first ten days or so, we’re looking at a constant run of cross-onshore and onshore breezes, with a lot of fresh to strong winds. The swell is there, no doubt, but it’s messy. The combined swell energy hits some big numbers, like 897 (moderate) on the 29th of August and even 1058 (strong) that afternoon, but the wind just tears it apart. That’s more of a kitesurfing setup than a paddle session.
The water is a standout though. When we finally get a clean window, the water temp is 67°F – that’s a whopping 6°F warmer than usual for this time of year. You won’t need a thick wetsuit, that’s for sure.
Now, if you’re desperate to get wet, keep your eyes on Thursday, 9th September. The morning session is the only time in the whole 16 days that gets a nod for “good surf conditions.” We’ve got a clean, cross-off breeze from the NW at 15 km/h, and a 4ft swell from the WSW. The period is a nice 11 seconds, which is proper groundswell energy. The combined energy is 446 (moderate), so there’s some push. The only catch? It’s Mewslade Bay, and it’s inconsistent and fairly consistent at the same time – it needs the right direction, and the optimum is SW. This is a left-hand reef setup, so that long-period swell (11s) will wrap in nicely. The crowds are said to be “sometimes,” so you might have it to yourself if you’re early.
For the rest of it? Honestly, the forecasts can change, but right now this is a blank run. It’s one of those periods where the ocean just doesn’t want to cooperate. Keep the board waxed and hope the wind shifts.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Wed night. Warm (max 24°C on Tue afternoon, min 16°C on Wed night). Winds decreasing (fresh winds from the E on Tue morning, calm by Wed afternoon). | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Fri night. Very mild (max 18°C on Fri afternoon, min 15°C on Sun night). Winds increasing (light winds from the SSE on Fri morning, strong winds from the W by Sun night). | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | W 8 | W 8 | W 10 | W 9 | W 8 | W 8 | W 7 | SW 4 | SW 8 | SW 7 | WSW 7 | WSW 7 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7 | 5 | 17 | 13 | 12 | 10 | 9 | 19 | 239 | 107 | 120 | 334 | 897 | 620 | 352 | 311 | 173 | 294 | 326 | 380 | 399 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross | glassy | cross-off | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-on |
High Tide | 5:45PM6.67m | 6:06AM6.78m | 6:23PM7.25m | 6:42AM7.30m | 6:58PM7.78m | 7:15AM7.75m | 7:31PM8.20m | 7:48AM8.10m | 8:03PM8.47m | 8:20AM8.30m | 8:36PM8.58m | 8:54AM8.35m | 9:11PM8.50m | ||||||||
Low Tide | 11:36AM2.19m | 00:01AM1.88m | 12:15PM1.66m | 00:37AM1.35m | 12:49PM1.17m | 1:10AM0.90m | 1:21PM0.77m | 1:41AM0.55m | 1:52PM0.48m | 2:11AM0.34m | 2:22PM0.33m | 2:42AM0.28m | 2:54PM0.34m | 3:14AM0.38m | |||||||
 | |  |  | |  |  | |  |  | |  |  | | | | | | | | | |
 | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — |
 | — | 8:20 | — | — | 8:17 | — | — | 8:15 | — | — | 8:13 | — | — | 8:10 | — | — | 8:08 | — | — | 8:07 | — |
mm | — | — | — | — | — | 6 | 5 | — | — | — | — | 4 | 1 | 1 | 1 | 3 | 2 | 1 | — | — | 1 |
Temp °C | 21 | 24 | 20 | 19 | 22 | 20 | 18 | 18 | 18 | 17 | 18 | 18 | 18 | 18 | 17 | 18 | 17 | 16 | 16 | 17 | 17 |
Feels °C | 18 | 22 | 19 | 19 | 23 | 20 | 15 | 14 | 18 | 17 | 15 | 14 | 12 | 15 | 14 | 13 | 10 | 9 | 9 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | W 8 | SW 8 | W 10 | W 9 | W 8 | W 8 | W 7 | SW 12 | SW 8 | SW 7 | — | W 7 | — | WSW 8 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | — | — | W 10 |
| kJ | 5 | 3 | 17 | 13 | 12 | 10 | 9 | 6 | 239 | 107 | — | 226 | — | 620 | 352 | 311 | 173 | 218 | — | — | 319 |
Swell 2 Height (m) Direction Period (s) | SW 13 | W 8 | SSW 8 | SSW 8 | SSW 7 | SW 7 | W 9 | — | — | W 8 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 7 | 5 | 7 | 6 | 5 | 2 | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 8 | W 10 | SW 13 | SW 13 | — | SW 12 | S 6 | — | — | W 9 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 3 | 2 | 7 | 6 | — | 6 | 1 | — | — | 6 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 4 | E 3 | SE 3 | SE 2 | — | — | ESE 3 | SW 4 | — | — | WSW 7 | WSW 7 | WSW 8 | WSW 8 | — | — | SSW 3 | WSW 8 | WSW 8 | WSW 9 | WSW 10 |
| kJ | 18 | 6 | 1 | 1 | — | — | 2 | 19 | — | — | 120 | 334 | 897 | 438 | — | — | 3 | 294 | 326 | 380 | 399 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 125 | 78 | 4 | 148 | 125 | 180 | 322 | 261 | 6 | 2 | 126 | 384 | 159 | 41 | 82 | 405 | 435 | 650 | 365 | 322 | 124 |
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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