Surf Forecasts:
Mewslade Bay surf forecast from 28 Aug 2026:
- Best quality surf: Friday 4 Sep, 7AM (local time) - 5ft (1.5m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 4AM (local time) - 8ft (2.5m), 9s period, WSW swell with 1,126 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 4PM (local time) - 3.5ft (1.1m), 8s period with SW swell.
Best Forecast Surf Conditions for Mewslade Bay this week:
The surf forecast for Mewslade Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 29) at 4PM. The primary swell is predicted to be 1.1m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mewslade Bay in the next 16 days are 2.5m 9s and forecast to arrive on Monday (Aug 31) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Saturday (Aug 29) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sat 29th Aug) | 3.5ft (1.1m) 8s |
| Best Surf | 7AM (Fri 4th Sep) | 5ft (1.5m) 8s |
| Most Powerful | 4AM (Mon 31st Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Right, let’s get into it.
We’re looking at Mewslade Bay for the next couple of weeks. Honestly, I’ve got to be straight with you – it’s a rough start. The water is sitting at 68°, which is a whopping 7° above normal for this time of year. That’s very unusual, feels like a warm bath out there.
The first few days are a write-off. Friday the 28th and Saturday the 29th are just messy – cross-onshore winds, lumpy, choppy, and the swell is short-period junk. Not worth paddling out for. Sunday the 30th brings a bit more size, with swell reaching 6ft from the SW, but the wind is onshore and strong, which makes for poor conditions. The combined energy is moderate (690), but it’s not going to be any fun.
Monday the 31st is the first real standout, but it’s for the more experienced crew. The swell is up at 7ft from the W with a period of 9 seconds, and the combined energy is strong (1552). That’s a powerful wave. The wind is cross-shore, not ideal, but the morning session could have some punchy walls. It’s a bit too big for beginners though.
After that, things drop off again. The first week of September is a real drag. Swell drops to under 3ft, wind is mostly cross-onshore or onshore, and the conditions are just ordinary. Thursday the 3rd has a bit of size at 6ft, but a 25 mph cross-onshore makes it a mess. Honestly, this setup looks more interesting for kite surfing than paddle surfing.
We then hit a gap of several days with no real recommendations. The surf just fades away. By the 7th of September, the swell is tiny and weak.
The second week doesn’t offer much hope. The 12th of September sees a late pulse of 7ft swell from the WSW, but the wind is a strong cross-shore or near gale force. The combined energy is strong (553), but it’ll be blown out and messy. Only for the hardcore, and even then, it’s a gamble.
So, for the best of a bad bunch, Monday 31st August morning at Mewslade Bay is the pick. The 7ft W swell has some grunt, and the cross-shore wind is the best we’ll see for that size. It’s a powerful, expert-only wave, but it’s the only real window of opportunity in the whole forecast.
Rusty.
Short Range ForecastHeavy rain (total 34mm), heaviest during Sun afternoon. Very mild (max 19°C on Sat afternoon, min 15°C on Sun night). Winds increasing (light winds from the NW on Sat afternoon, strong winds from the SW by Sun night). | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Wed morning. Very mild (max 19°C on Wed night, min 16°C on Mon morning). Winds increasing (light winds from the WNW on Tue night, fresh winds from the WSW by Wed night). | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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 6 | SW 6 | SW 6 | WSW 6 | SW 8 | WSW 10 | WSW 9 | SW 8 | WSW 8 | W 9 | WSW 9 | WSW 10 | WSW 6 | WSW 7 | WSW 7 | WSW 5 | WSW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 114 | 128 | 109 | 61 | 142 | 625 | 273 | 434 | 1068 | 828 | 641 | 276 | 55 | 63 | 57 | 62 | 166 | 897 | 460 | 404 | 375 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-off | cross-on | on | on | cross-on | cross | cross | cross-on | cross | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 10:08AM7.90m | 10:28PM7.78m | 10:51AM7.44m | 11:16PM7.20m | ||||||||
Low Tide | 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 | 4:06PM0.85m | 4:28AM1.10m | 4:49PM1.33m | ||||||||
 |  |  |  |  | | | |  |  |  |  | | | |  | | | | |  | |
 | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — |
 | — | 8:13 | — | — | 8:10 | — | — | 8:08 | — | — | 8:07 | — | — | 8:04 | — | — | 8:01 | — | — | 8:00 | — |
mm | 3 | 2 | 5 | 6 | — | 1 | 2 | 11 | 4 | — | — | — | — | — | 2 | 2 | 4 | 2 | — | 1 | 1 |
Temp °C | 18 | 18 | 17 | 18 | 19 | 17 | 19 | 17 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 17 | 19 | 19 | 19 | 18 |
Feels °C | 14 | 15 | 14 | 15 | 19 | 13 | 14 | 11 | 9 | 13 | 13 | 14 | 14 | 13 | 14 | 15 | 12 | 15 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | S 12 | — | — | WSW 6 | SW 8 | WSW 10 | WSW 9 | WSW 8 | — | WSW 9 | — | WSW 10 | WSW 6 | SW 18 | SW 16 | SW 16 | — | — | SW 15 | SW 15 | SW 15 |
| kJ | 3 | — | — | 61 | 142 | 625 | 273 | 256 | — | 724 | — | 276 | 55 | 12 | 10 | 10 | — | — | 8 | 9 | 9 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | ESE 3 | — | — | — | — | — | — | — | WSW 9 | W 18 | W 16 | SW 16 | — | — | SW 15 | — | W 16 |
| kJ | — | — | — | — | 1 | — | — | — | — | — | — | — | 25 | 6 | 5 | 10 | — | — | 8 | — | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | SW 6 | SW 6 | SSE 4 | — | — | — | SW 8 | WSW 8 | W 9 | WSW 9 | — | — | WSW 7 | WSW 7 | WSW 5 | WSW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 |
| kJ | 114 | 128 | 109 | 11 | — | — | — | 434 | 1068 | 828 | 641 | — | — | 63 | 57 | 62 | 166 | 897 | 460 | 404 | 375 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 299 | 406 | 288 | 185 | 0 | 31 | 64 | 377 | 82 | 650 | 33 | 31 | 16 | 358 | 214 | 358 | 424 | 322 | 322 | 365 | 141 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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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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