Surf Forecasts:
Mewslade Bay surf forecast from 26 Aug 2026:
- Most powerful swell: Monday 31 Aug, 1AM (local time) - 10ft (3.0m), 9s period, WSW swell with 1,320 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 9s and forecast to arrive on Monday (Aug 31) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (Aug 27) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Mon 31st Aug) | 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 cooking for the next couple of weeks.
We’re kicking off with a pretty grim start, I’m not gonna lie. The water is sitting at 67° which is a massive 6° warmer than usual for this time of year - that’s a real anomaly, feels like a warm bath out there. But the surf? For the first week or so, it’s a write-off. There’s a long stretch of poor conditions with onshore winds and messy chop. The swell is small and weak, mostly under 3 ft, and the energy readings are pathetic - down in the 6 to 27 range. You’re better off staying on the couch.
We finally get a bit of a pulse around the 31st of August with a 7 ft W/SW swell, but the wind is still a problem - fresh cross-shore with lumpy chop. That keeps the conditions poor. The energy is moderate at 708, but you’d be fighting a losing battle.
Things start to look up on the 2nd of September. It’s small, only 4 ft from the WSW, but the wind goes glassy in the morning. The energy is weak at 157, but it’s clean. It’s not gonna blow your mind, but it’s surfable.
The real standout window is shaping up for the 5th and 10th of September. On the 5th, Saturday morning, Mewslade Bay (Gower) gets a clean 5 ft W/SW groundswell with a 11-second period, and light NNW cross-offshore winds. The energy is strong at 561, and the conditions are clean. This is the best bet in the near term - a proper autumn groundswell with clean lines.
Then, hold onto your boards, the 10th of September delivers the goods. Thursday morning sees a 6 ft WSW swell, with a 10-second period, and light NE offshore winds. The energy is very strong at 1252. That’s a serious pulse. It’s clean, offshore, and sets will have some punch. This is one for the experienced crew, as the swell is solid and the period is decent. The afternoon goes glassy with a 8 ft swell, but it’s a shorter period, so it might be a bit fat and close out at the beach.
Overall, it’s a slow start, but patience pays off. The 5th and 10th are your days to mark on the calendar. The 10th is the standout, but it’s still a way off, so keep an eye on the forecasts.
Rusty.
Short Range ForecastModerate rain (total 18mm), heaviest on Fri night. Warm (max 23°C on Wed afternoon, min 17°C on Thu night). Winds increasing (calm on Wed afternoon, fresh winds from the SSE by Fri night). | Days 4-6 Weather SummaryHeavy rain (total 28mm), heaviest during Sun afternoon. Very mild (max 18°C on Sat morning, min 15°C on Sun night). Winds decreasing (near gales from the SSW on Sat morning, moderate winds from the WSW by Mon afternoon). | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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 9 | W 8 | W 8 | W 7 | W 7 | SW 4 | SW 6 | WSW 7 | WSW 7 | SW 6 | SW 8 | WSW 10 | WSW 9 | SW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 7 | WSW 7 | W 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 13 | 12 | 10 | 10 | 4 | 18 | 92 | 154 | 236 | 282 | 525 | 1080 | 465 | 490 | 1320 | 958 | 673 | 368 | 415 | 228 | 106 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross | cross | cross-on | cross-on | cross | cross | cross-off |
High Tide | 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 | 9:30AM8.21m | 9:48PM8.23m | ||||||||
Low Tide | 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 | 3:28PM0.51m | 3:49AM0.66m | |||||||
 | |  |  |  |  |  | | | | |  |  | | | | |  | | |  | |
 | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — |
 | — | 8:17 | — | — | 8:15 | — | — | 8:13 | — | — | 8:10 | — | — | 8:08 | — | — | 8:07 | — | — | 8:04 | — |
mm | — | — | 1 | 3 | — | 3 | 3 | 3 | 5 | 5 | 2 | — | 2 | 12 | 3 | — | — | 4 | 4 | — | — |
Temp °C | 19 | 23 | 21 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 16 | 15 | 16 | 17 | 17 | 17 | 17 |
Feels °C | 18 | 23 | 20 | 17 | 17 | 16 | 15 | 15 | 15 | 12 | 11 | 12 | 14 | 12 | 9 | 11 | 12 | 12 | 12 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 8 | W 8 | W 7 | W 7 | — | — | — | — | — | — | WSW 10 | WSW 9 | — | — | — | W 9 | W 9 | — | SW 18 | SW 16 |
| kJ | 13 | 12 | 10 | 10 | 4 | — | — | — | — | — | — | 1080 | 465 | — | — | — | 563 | 293 | — | 12 | 10 |
Swell 2 Height (m) Direction Period (s) | SSW 8 | S 3 | SW 7 | — | SW 7 | W 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 |
| kJ | 6 | 1 | 2 | — | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 |
Swell 3 Height (m) Direction Period (s) | SW 13 | SSW 7 | — | SW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 6 | 5 | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 3 | — | ESE 2 | ESE 3 | — | SW 4 | SW 6 | WSW 7 | WSW 7 | SW 6 | SW 8 | WSW 10 | — | SW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 7 | WSW 7 | W 7 |
| kJ | 1 | — | 1 | 2 | — | 18 | 92 | 154 | 236 | 282 | 525 | 815 | — | 490 | 1320 | 958 | 673 | 368 | 415 | 228 | 106 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 126 | 384 | 377 | 135 | 172 | 153 | 206 | 141 | 104 | 429 | 192 | 192 | 265 | 100 | 141 | 10 | 135 | 124 | 592 | 322 | 236 |
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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