Surf Forecasts:
Mewslade Bay surf forecast from 18 Jul 2026:
- Most powerful swell: Sunday 19 Jul, 7PM (local time) - 0.5ft (0.1m), 19s period, SW swell with 15 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 0.1m 19s and forecast to arrive on Sunday (Jul 19) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Jul 22) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Sun 19th Jul) | 0.5ft (0.1m) 19s |
Table - best surf conditions forecast for Mewslade Bay over the next 16 days.
The Lowdown
Alright, I’m looking at the forecast for the next 16 days, and honestly, it’s a bit of a tough one for us. The surf is going to be real small and pretty weak for most of the run, with a long gap of hardly anything worth paddling out for. The good news is we’ve got a little pulse of energy trying to show up late in the month, but it’s marginal at best.
The water is sitting at 69°F around Mewslade Bay, which is a full 9°F warmer than usual for this time of year. That’s very unusual—you’ll feel it as soon as you hop in.
From now through the end of July, we’re looking at a dry spell. Swell heights are barely a ripple, mostly 0.3ft to 0.7ft, with a few tiny bumps. The combined energy of all swells is just a whisper, with numbers like 13 or 15 (that’s weak). Winds are mostly clean, with some glassy mornings on the 18th, 20th, and 21st, but there’s no swell to work with. You’re better off staying home or going for a longboard cruise if you’re desperate. The only real change comes on the 27th of July, when we finally see a jump.
On Monday the 27th of July, the morning brings a 5ft swell from the west, with a period of 7 seconds – that’s a short period, so it’ll be a bit fat and not super organized. The combined energy is 247 (moderate), which is the strongest we’ve seen. The wind is a gentle cross-shore from the WNW, so it’s not too choppy, but the wave comment says it’s marginal. This is a beginner-friendly size, but the quality isn’t going to blow your mind. The 28th of July drops back to 4ft in the morning, with a clean cross-offshore wind from the NNW, and energy at 186 – still moderate. That might be your best bet for a quiet, clean session with some waist-high lines.
Honestly, for the whole 16 days, there’s no standout. If I had to pick the least bad option, it’s the morning of the 28th of July at Mewslade Bay. The 4ft swell from the west, combined with the clean northerly wind, will likely give you a few fun ones, but it’s not a day to get excited about. The break is fairly consistent, but crowds can be an issue here sometimes, so you might have some company.
The rest of the forecast into early August is back to tiny, weak surf, with energy values dropping into the double digits. It’s a quiet stretch, so keep your board waxed and wait for the next proper swell.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Mon afternoon, min 14°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Tue afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the N on Wed night, calm by Thu morning). | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
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 | WNW 4 | W 7 | W 19 | W 10 | W 9 | SW 18 | W 18 | W 11 | W 10 | W 10 | W 10 | W 9 | W 9 | W 9 | W 8 | W 14 | SW 13 | W 8 | W 3 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 5 | 1 | 1 | 7 | 2 | 2 | 12 | 6 | 2 | 2 | 10 | 7 | 7 | 6 | 8 | 6 | 4 | 7 | 1 | 2 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross | cross | off | glassy | cross-off | off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-off | cross-on | cross-on | cross-on |
High Tide | 9:50AM8.11m | 10:10PM8.34m | 10:33AM7.74m | 10:54PM7.85m | 11:17AM7.27m | 11:38PM7.27m | 12:02PM6.78m | 00:26AM6.68m | 12:53PM6.31m | 1:21AM6.18m | 1:54PM5.96m | 2:29AM5.85m | 3:07PM5.83m | 3:44AM5.81m | |||||||
Low Tide | 3:56PM0.60m | 4:24AM0.69m | 4:39PM0.98m | 5:07AM1.15m | 5:22PM1.45m | 5:51AM1.66m | 6:09PM1.94m | 6:39AM2.15m | 7:04PM2.39m | 7:36AM2.55m | 8:09PM2.70m | 8:45AM2.76m | 9:24PM2.78m | ||||||||
 | |  | | |  | | | | | | |  | | | | | | | | | |
 | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:28 | — | — |
 | — | — | 9:24 | — | — | 9:23 | — | — | 9:22 | — | — | 9:22 | — | — | 9:20 | — | — | 9:19 | — | — | 9:17 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 20 | 17 | 20 | 19 | 19 | 21 | 20 | 20 | 22 | 19 | 20 | 21 | 17 | 18 | 20 | 19 | 18 | 19 | 17 |
Feels °C | 18 | 15 | 18 | 14 | 15 | 16 | 17 | 16 | 18 | 18 | 19 | 16 | 16 | 17 | 11 | 18 | 19 | 17 | 17 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | — | W 8 | N 4 | W 7 | W 7 | WNW 4 | W 9 | W 8 | W 8 | W 11 | W 10 | W 10 | W 10 | W 9 | W 9 | NNW 3 | W 8 | W 8 | W 8 | W 8 | W 8 |
| kJ | — | 5 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 8 | 7 | 7 | 6 | 1 | 6 | 1 | 1 | 1 | 1 |
Swell 2 Height (m) Direction Period (s) | W 8 | SW 5 | WNW 4 | — | — | W 10 | — | SW 18 | W 11 | W 7 | W 7 | SW 16 | — | — | W 15 | W 9 | W 14 | W 14 | SW 13 | — | — |
| kJ | 5 | 1 | 1 | — | — | 2 | — | 12 | 2 | 1 | 1 | 10 | — | — | 4 | 6 | 4 | 4 | 7 | — | — |
Swell 3 Height (m) Direction Period (s) | SW 5 | S 11 | W 8 | — | W 19 | W 7 | — | W 11 | W 18 | — | — | W 7 | — | — | — | SW 15 | — | — | — | — | — |
| kJ | 1 | 2 | 1 | — | 7 | 1 | — | 2 | 6 | — | — | 1 | — | — | — | 8 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NW 3 | ENE 3 | E 3 | — | N 3 | N 3 | — | N 4 | ENE 2 | NNE 2 | NNW 3 | N 4 | NNW 4 | NNW 4 | — | — | NNW 3 | — | — | W 3 |
| kJ | — | 4 | 6 | 1 | — | 3 | 1 | — | 7 | 1 | 1 | 4 | 9 | 18 | 18 | — | — | 1 | — | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 403 | 429 | 78 | 384 | 180 | 364 | 364 | 377 | 374 | 125 | 180 | 198 | 198 | 198 | 198 | 78 | 465 | 364 | 378 | 378 | 408 |
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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