Surf Forecasts:
Mewslade Bay surf forecast from 21 Aug 2026:
- Most powerful swell: Friday 28 Aug, 7AM (local time) - 5.5ft (1.7m), 7s period, WSW swell with 241 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 1.7m 7s and forecast to arrive on Friday (Aug 28) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Tuesday (Aug 25) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Fri 28th Aug) | 5.5ft (1.7m) 7s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get into it.
We’re looking at a pretty bleak stretch ahead at Mewslade Bay. Plain and simple, this 16-day window is a write-off for decent waves. There’s nothing on offer for the first week and a bit. The few days we get a sniff of something are ruined by onshore or cross-shore winds.
Friday the 21st is flat with a tiny 2ft swell from the WSW and a moderate cross-off breeze. It’s clean but gutless. Saturday the 22nd is even smaller with a glassy 1ft in the morning, but it’s still tiny. Sunday through to Thursday the 28th is a repeating pattern of knee-high mush, often chopped up by wind. Common phrase around here: "poor surf conditions."
Now, Friday the 28th of August is the one and only chance. We get a morning window with a 5ft swell from the WSW, and a 12 mph offshore wind from the NNE. That's clean. The combined energy is moderate, so there’s a little bit of push. The period is only 7 seconds though, so it’s a short-period windswell. It’s on the small side of intermediate, so it won't be a day for the beginners to get scared. The crowds are listed as "sometimes", so you might have a few out, but it won’t be a circus. But hold up – Saturday the 29th sees that swell jump to 7ft but the wind goes cross-on and it turns into a choppy mess. Sunday the 30th is rain and onshore wind.
So, if you’re desperate, be on the water first thing Friday the 28th. That’s your one shot. After that, it’s back to nothing. A long blank run like this is more normal for this area when the conditions don’t line up.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 20°C on Sun afternoon, min 13°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 25mm), heaviest during Wed morning. Warm (max 23°C on Mon afternoon, min 15°C on Sun night). Mainly strong winds. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 8 | WSW 8 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | W 9 | WSW 14 | SW 11 | SW 9 | SW 9 | W 9 | SW 13 | SE 4 | SSW 5 | SSW 4 | SSW 5 | SW 6 | WSW 7 | SW 7 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 55 | 22 | 23 | 31 | 18 | 16 | 8 | 19 | 30 | 23 | 13 | 7 | 7 | 25 | 17 | 16 | 47 | 113 | 57 | 64 | 91 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | glassy | cross | off | cross-off | cross | off | cross | cross-off | cross-off | cross | cross | cross | cross-on | on | cross-on | cross-on | on | cross-on |
High Tide | 12:52PM5.80m | 1:31AM5.54m | 2:16PM5.50m | 3:07AM5.42m | 3:51PM5.63m | 4:30AM5.72m | 4:59PM6.09m | 5:25AM6.23m | 5:45PM6.67m | 6:06AM6.78m | 6:23PM7.25m | 6:42AM7.30m | 6:58PM7.78m | ||||||||
Low Tide | 6:31AM2.73m | 7:09PM2.91m | 7:50AM3.10m | 8:44PM3.11m | 9:29AM3.09m | 10:16PM2.89m | 10:45AM2.71m | 11:17PM2.42m | 11:36AM2.19m | 00:01AM1.88m | 12:15PM1.66m | 00:37AM1.35m | 12:49PM1.17m | 1:10AM0.90m | |||||||
 | |  | | |  | | | |  |  |  | |  |  |  |  |  | | |  | |
 | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — |
 | — | 8:28 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:20 | — | — | 8:17 | — | — | 8:15 | — |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 5 | 6 | 10 | 4 | 5 | 2 | 2 | 5 |
Temp °C | 16 | 17 | 15 | 16 | 17 | 15 | 16 | 20 | 18 | 20 | 23 | 20 | 21 | 23 | 19 | 19 | 20 | 17 | 18 | 18 | 17 |
Feels °C | 12 | 12 | 12 | 14 | 14 | 11 | 15 | 17 | 15 | 15 | 19 | 13 | 14 | 20 | 17 | 16 | 15 | 13 | 17 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | WSW 6 | WSW 8 | WSW 10 | WSW 10 | WSW 9 | W 9 | W 9 | SW 11 | SW 9 | SW 9 | W 9 | SW 9 | SE 4 | SSW 5 | SSW 8 | W 8 | SW 6 | WSW 7 | SW 7 | WSW 10 |
| kJ | 55 | 12 | 23 | 31 | 18 | 16 | 6 | 6 | 30 | 23 | 13 | 6 | 3 | 19 | 17 | 6 | 12 | 113 | 57 | 64 | 35 |
Swell 2 Height (m) Direction Period (s) | SW 13 | WSW 8 | W 5 | SW 15 | SW 15 | SW 15 | SW 14 | WSW 14 | SW 14 | SW 14 | W 9 | SW 9 | W 8 | SW 8 | SSW 8 | W 9 | SW 12 | WSW 8 | SW 8 | W 8 | SW 8 |
| kJ | 7 | 22 | 4 | 9 | 8 | 8 | 8 | 19 | 8 | 8 | 6 | 3 | 1 | 3 | 6 | 6 | 6 | 20 | 50 | 42 | 2 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 13 | SW 13 | SW 15 | S 12 | SW 12 | — | — | SW 14 | W 14 | SW 14 | SW 13 | SW 13 | W 8 | W 8 | SW 12 | — | W 10 | — | SE 3 | — |
| kJ | 11 | 7 | 7 | 9 | 3 | 6 | — | — | 8 | 4 | 7 | 7 | 7 | 1 | 1 | 6 | — | 2 | — | 2 | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | NW 3 | NE 3 | — | — | NNW 3 | — | — | — | ESE 3 | E 3 | E 4 | E 4 | SE 4 | SE 4 | SSW 4 | SSW 5 | — | SSE 3 | SW 7 | SW 7 |
| kJ | 4 | 2 | 3 | — | — | 2 | — | — | — | 1 | 5 | 34 | 41 | 25 | 3 | 16 | 47 | — | 8 | 33 | 91 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 274 | 78 | 4 | 188 | 5 | 37 | 143 | 4 | 377 | 66 | 311 | 323 | 332 | 153 | 204 | 288 | 46 | 6 | 377 | 6 |
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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