
Surf Forecasts:
Rest Bay surf forecast from 15 Sep 2026:
- Best quality surf: Sunday 20 Sep, 7AM (local time) - 3.5ft (1.0m), 7s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 17 Sep, 7AM (local time) - 6ft (1.8m), 7s period, WSW swell with 286 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 7AM (local time) - 3.5ft (1.0m), 7s period with WSW swell.
Best Forecast Surf Conditions for Rest Bay this week:
The surf forecast for Rest Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 20) at 7AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.1m and 14s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rest Bay in the next 16 days are 1.8m 7s and forecast to arrive on Thursday (Sep 17) at 7AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 20th Sep) | 3.5ft (1.0m) 7s |
| Best Surf | 7AM (Sun 20th Sep) | 3.5ft (1.0m) 7s |
| Most Powerful | 7AM (Thu 17th Sep) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Rest Bay over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for Rest Bay. Not gonna lie to ya, it’s a tough stretch ahead. We’ve got a long, long run of real ordinary conditions before anything half decent shows its face.
From now through most of the month, the wind is just relentless. It’s hammering in from the west and northwest, mostly cross-onshore, and that’s absolutely wrecking whatever swell is out there. We’re looking at a solid 8 days straight of poor surf quality, with wave heights bouncing between 2 ft and 5 ft but all of it blown out, lumpy, and choppy. The energy is all over the place, from a weak 108 (moderate wave energy) up to a moderate 354, but it doesn’t matter because the wind just won’t give us a break. The swell is a short-period 7 seconds for most of this, all windswell and no shape to it. Forget about it.
There’s a bit of a tease on the morning of Sunday the 21st when the wind goes glassy, but the swell drops right off to a tiny 2 ft with only 40 (weak wave energy). That’s not worth paddling out for.
Now, the first flash of real hope comes on Tuesday the 22nd of September. It’s still small, at a 2 ft swell from the WSW, but the period stretches to 10 seconds – that’s a bit more of a groundswell pulse. More importantly, the morning is glassy, dead calm. The energy is only 56, so it’s weak, but it’s clean. That’s the best we’ll have seen in two weeks.
The best on offer, and the only real standout, is Wednesday the 23rd of September. We’ve got a light easterly cross-offshore breeze in the morning and afternoon, which means clean conditions. Swell ticks up a bit to 3 ft from the WSW with a 9-second period, and the combined energy sits at a moderate 159. It’s not big, not powerful, but for Rest Bay it’s surfable and clean. This will be the pick of the whole 16-day run. Because the wind is so light and from the east, you’ll get some of the best shaped little waves this place can offer when it’s that small. Keep your expectations low, but this is the window.
After that, it’s back into the doldrums. From the 24th through to the end of the forecast period, the swell drops away to nothing, barely scraping 1 ft, with the energy falling into single digits and weak 9 to 13-second periods. The wind goes clean and offshore again with a lot of clear skies, but there’s just no water moving. It’s a proper flat spell. The last day on the charts, the 30th, shows a tiny bump to 3 ft from the WSW with a 10-second period and moderate energy of 124, with a clean cross-offshore wind, but that’s still mighty small. That’s a mid-week long-range hope for the dedicated.
Honestly, for this stretch, if you’re not on a longboard or a foil, you might be looking at the weather for kite surfing. The setup’s just not there for a proper paddle session for most of it.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Wed night. Very mild (max 18°C on Mon night, min 13°C on Tue night). Winds increasing (light winds from the WNW on Tue night, fresh winds from the WSW by Wed night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri afternoon. Very mild (max 17°C on Fri night, min 13°C on Thu night). Winds decreasing (fresh winds from the WSW on Fri night, calm by Sat night). | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 7 | W 7 | W 7 | W 9 | W 10 | W 10 | WSW 7 | WSW 7 | W 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 9 | WSW 7 | WSW 7 | WSW 7 | WSW 8 |
Wave Graph | |||||||||||||||||||||
143 | 181 | 120 | 256 | 250 | 58 | 276 | 214 | 171 | 111 | 108 | 198 | 173 | 176 | 141 | 66 | 157 | 48 | 36 | 28 | 19 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | on | cross-on | glassy | cross-on | glassy |
High Tide | 9:32AM8.57m | 9:49PM8.36m | 10:05AM8.05m | 10:23PM7.72m | 10:39AM7.43m | 10:59PM7.03m | 11:18AM6.78m | 11:43PM6.35m | 12:10PM6.16m | 00:48AM5.78m | 1:33PM5.74m | 2:32AM5.58m | 3:22PM5.85m | ||||||||
Low Tide | 3:30PM0.76m | 3:47AM1.08m | 4:03PM1.29m | 4:19AM1.68m | 4:39PM1.92m | 4:56AM2.31m | 5:21PM2.57m | 5:44AM2.93m | 6:24PM3.16m | 7:03AM3.41m | 8:09PM3.44m | 8:58AM3.43m | 9:52PM3.17m | ||||||||
6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | |
— | 7:30 | — | — | 7:28 | — | — | 7:25 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:15 | — | |
mm | — | — | — | — | — | 3 | 3 | — | — | — | 1 | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 18 | 20 | 19 |
Feels °C | 11 | 10 | 13 | 12 | 10 | 10 | 12 | 9 | 10 | 11 | 11 | 12 | 13 | 14 | 15 | 17 | 16 | 17 | 18 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | W 11 | — | W 7 | W 9 | W 10 | W 10 | — | — | W 7 | WSW 7 | — | W 12 | — | — | W 14 | W 9 | W 9 | WSW 7 | WSW 7 | WSW 7 | WSW 8 |
2 | — | 120 | 256 | 104 | 52 | — | — | 143 | 111 | — | 3 | — | — | 4 | 39 | 157 | 48 | 36 | 28 | 19 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | WSW 10 | — | — | W 9 | — | — | — | — | — | W 10 | W 14 | — | W 14 | W 14 | W 13 | — |
— | — | — | — | — | 34 | — | — | 44 | — | — | — | — | — | 31 | 4 | — | 4 | 4 | 4 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 14 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 7 | W 7 | — | — | W 10 | WSW 5 | WSW 7 | WSW 7 | W 7 | — | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 8 | — | — | — | — |
143 | 181 | — | — | 250 | 58 | 276 | 214 | 171 | — | 108 | 198 | 173 | 176 | 141 | 66 | 122 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 356 | 356 | 21 | 30 | 159 | 340 | 419 | 356 | 30 | 133 | 311 | 311 | 356 | 152 | 138 | 2 | 84 | 4 | 2 | 124 | 34 |
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.










