Surf Forecasts:
Rest Bay surf forecast from 29 Aug 2026:
- Most powerful swell: Monday 31 Aug, 7AM (local time) - 6ft (1.8m), 9s period, WSW swell with 564 kJ wave energy.
Best Forecast Surf Conditions for Rest Bay this week:
The most powerful waves expected at Rest Bay in the next 16 days are 1.8m 9s and forecast to arrive on Monday (Aug 31) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Mon 31st Aug) | 6ft (1.8m) 9s |
Table - best surf conditions forecast for Rest Bay over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s cut to it. This 16-day stretch for Rest Bay is a long, flat, and windy slog. The water is sitting at a very unusual 69°F, which is much warmer than normal for this time of year, but that’s the only thing that’s unusual. The first week is a bust: from Saturday the 29th through the end of the month, it’s mostly onshore wind, with swell heights from 2ft to 6ft, but the combined wave energy is weak, sitting between 31 and 63 (moderate wave energy) at best. Short period swells, under 8 seconds, mean the waves are weak and crumbly. The wind is all wrong – cross-on or onshore, so it’s choppy and messy. Not worth the paddle.
Then we hit a big gap of flat days around the 5th and 6th of September. The combined energy drops to 38 or 42, with tiny 2ft waves.
The one true standout comes on Monday the 7th of September. The morning is glassy – calm wind, zero breeze. The swell hits 4ft from the west, with a period of 10 seconds. That’s a solid groundswell, and it’s bringing some decent energy (273 combined wave energy). The wind is offshore or glassy, so the waves will be clean and lined up. This is your best window. The afternoon stays clean with light offshore wind, but the swell drops a bit to 4ft. Still, it’s a good day.
After that, the second week fades fast. The swell drops to 2ft to 3ft, the wind picks up again, and by the 10th of September, it’s flat with only 8 combined energy from a tiny 0.3ft swell. The 11th and 12th are blown out with strong winds, and the swell is just a ripple. The 13th has some chest-high swell but again with strong cross-onshore winds, making it messy.
So, bottom line: if you’re patient, mark Monday the 7th of September. That glassy morning with chest-high, clean waves is your best bet. The rest of the window is a write-off. Don’t bother.
Rusty.
Short Range ForecastHeavy rain (total 34mm), heaviest during Sat morning. Very mild (max 19°C on Sun morning, min 14°C on Sun night). Winds increasing (calm on Sat morning, fresh winds from the WSW by Sun night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Wed morning. Very mild (max 19°C on Wed morning, min 15°C on Thu night). Winds increasing (moderate winds from the SW on Tue morning, strong winds from the W by Thu night). | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 7 | W 9 | WSW 9 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 10 | W 9 | WSW 4 | WSW 6 | WSW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | W 7 | WSW 7 | W 6 | WSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 30 | 63 | 292 | 186 | 254 | 404 | 495 | 352 | 159 | 101 | 34 | 48 | 202 | 522 | 452 | 350 | 335 | 245 | 161 | 165 | 108 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:11PM9.00m | 8:29AM8.84m | 8:45PM9.12m | 9:03AM8.89m | 9:20PM9.04m | 9:38AM8.75m | 9:57PM8.76m | 10:17AM8.41m | 10:38PM8.28m | 11:00AM7.92m | 11:25PM7.66m | 11:52AM7.32m | 00:25AM7.00m | ||||||||
Low Tide | 1:59PM0.51m | 2:18AM0.36m | 2:29PM0.35m | 2:48AM0.29m | 3:00PM0.35m | 3:19AM0.40m | 3:33PM0.53m | 3:54AM0.69m | 4:10PM0.88m | 4:33AM1.15m | 4:54PM1.40m | 5:20AM1.75m | 5:49PM2.00m | ||||||||
 |  |  |  |  |  |  |  |  | | | | | | |  | | | | | | |
 | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — | 6:31 | — | — |
 | — | 8:08 | — | — | 8:06 | — | — | 8:04 | — | — | 8:01 | — | — | 8:00 | — | — | 7:58 | — | — | 7:54 | — |
mm | 19 | 1 | — | 2 | 5 | 6 | — | — | 1 | — | — | 4 | 5 | — | 1 | — | 1 | 1 | — | — | — |
Temp °C | 17 | 18 | 17 | 19 | 17 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 19 | 19 | 18 | 18 | 18 | 17 | 17 | 18 | 16 |
Feels °C | 18 | 16 | 14 | 16 | 13 | 10 | 10 | 11 | 14 | 14 | 13 | 13 | 15 | 15 | 14 | 14 | 13 | 11 | 8 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | WSW 6 | — | W 9 | WSW 9 | — | — | — | — | WSW 10 | W 9 | — | W 8 | — | — | — | W 15 | W 15 | SW 15 | W 9 | — | WSW 9 |
| kJ | 30 | — | 275 | 186 | — | — | — | — | 159 | 101 | — | 6 | — | — | — | 4 | 5 | 9 | 44 | — | 17 |
Swell 2 Height (m) Direction Period (s) | W 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 |
| kJ | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | SW 7 | WSW 9 | — | WSW 8 | WSW 8 | WSW 9 | WSW 9 | — | — | WSW 4 | WSW 6 | WSW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | W 7 | WSW 7 | W 6 | WSW 6 |
| kJ | 4 | 63 | 292 | — | 254 | 404 | 495 | 352 | — | — | 34 | 48 | 202 | 522 | 452 | 350 | 335 | 245 | 161 | 165 | 108 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 391 | 245 | 22 | 29 | 340 | 596 | 356 | 158 | 22 | 138 | 138 | 311 | 442 | 455 | 299 | 311 | 895 | 379 | 584 | 356 | 70 |
Best forecast wave conditions in Wales - South East | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Rest Bay Surf forecast
The above surf forecast table for Rest Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rest Bay can be found by selecting the local surf guide option on the grey menu. Our Rest 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 (Rest 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 Rest 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.
Rest Bay is 1 km (1 miles) from Porthcawl. If you plan a holiday in Wales - South East, look for hotels and other accommodation in Porthcawl. Porthcawl has rooms for a wide range of budgets as well as car hire and transport links.
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