
Surf Forecasts:
Crab Island surf forecast from 9 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 13 Aug, 10PM (local time) - 3ft (0.9m), 10s period, W swell with 154 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period with WSW swell.
Best Forecast Surf Conditions for Crab Island this week:
The surf forecast for Crab Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 10PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.2m and 3s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Crab Island in the next 16 days are 0.9m 10s and forecast to arrive on Thursday (Aug 13) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Friday (Aug 14) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 10PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 10PM (Thu 13th Aug) | 3ft (0.9m) 10s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s be straight with you. Looking at the charts for the next couple of weeks, it’s a pretty quiet stretch for our shores. We’ve got a lot of tiny, weak swell and not much push behind it. The energy in the water is gonna be low for the most part, and you’ll be scratching around for anything rideable. It’s not a total write-off, but you gotta be patient and pick your moments.
The first few days are looking pretty sad. Through Sunday and Monday, we’re looking at knee-high mush at best. The swell is weak, with combined energy readings in the low double digits, like 5 and 24. The wind is mostly cross or light, so it’s not going to be a total mess, but there’s just nothing to work with. You’re better off doing something else.
We finally see a little pulse of energy roll in for Thursday morning, the 13th. It’s still small, only about 2.5ft, but the period stretches out to 11 seconds, which gives it a bit more grunt. The energy reading jumps to 177, which is the best we’ll see for a while. The wind is dead glassy, so it’ll be clean. This is the standout of the first week, but don’t get too excited. It’s still just a small, clean, surfable wave. The water temp is about average for this time of year, so nothing crazy there.
After that, it’s back to the small stuff. Friday and Saturday are pretty much flat with weak, short-period wind swell. The energy drops right back down, and we’re back to chasing shadows. The wind is okay, clean at times, but the surf is just not there.
The following week doesn't offer much hope either. We’ve got a long stretch of small, weak surf from about the 17th through the 23rd. There’s a slight bump in the swell on the 19th, with 2.5ft and a bit more energy (51 and 84), and the wind is offshore in the morning, so it’ll be clean. But again, it’s not going to be anything to write home about. The period is short, around 6 seconds, so it’ll be soft and crumbly, not really offering any punch.
There’s another moment on the 23rd, a Sunday, where the morning goes glassy with a 2.5ft swell, but the energy is still modest. It’s surfable, but ordinary. The whole window is just lacking that real groundswell. We’ve got a lot of small, short-period stuff, which isn't great for the reef here. It’ll be and a bit fat, not the kind of wave that gets your heart pumping.
So, the honest truth is, this 16-day run is a bit of a bust. There’s nothing that stands out as a proper session. The only time I’d really consider paddling out is that Thursday morning glass-off, but only if you’re desperate for a slide. The rest of the time, the kites might have more fun than us. The forecast can change, and it tends not to stay this poor for long, but as it stands, keep your board in the car and your expectations low.
Keep an eye on the charts, and I’ll see you out there when it turns on.
Short Range ForecastMostly dry. Warm (max 26°C on Tue afternoon, min 14°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 31°C on Wed afternoon, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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 8 | SW 4 | W 6 | SW 6 | SW 7 | W 8 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | W 9 | WSW 8 | WSW 8 | WSW 8 | WSW 7 |
Wave Graph | |||||||||||||||||||||
4 | 2 | 4 | 23 | 6 | 7 | 5 | 7 | 25 | 57 | 74 | 92 | 153 | 136 | 128 | 64 | 57 | 22 | 12 | 11 | 11 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | off | cross | cross-off | cross-on | cross-on | cross | cross-on | cross-on | glassy | glassy | cross | cross-off | cross-off | cross-off | off | glassy | cross | cross |
High Tide | 3:58PM7.72m | 4:41AM7.93m | 5:13PM8.36m | 5:50AM8.55m | 6:15PM9.02m | 6:47AM9.10m | 7:08PM9.53m | 7:37AM9.48m | 7:55PM9.82m | 8:21AM9.64m | 8:38PM9.89m | 9:01AM9.60m | 9:16PM9.76m | ||||||||
Low Tide | 9:32AM2.97m | 10:18PM2.69m | 10:52AM2.46m | 11:32PM2.07m | 11:58AM1.85m | 00:33AM1.47m | 12:53PM1.33m | 1:26AM1.04m | 1:41PM1.00m | 2:12AM0.82m | 2:23PM0.87m | 2:52AM0.81m | 3:01PM0.92m | 3:27AM0.99m | |||||||
5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | |
— | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 17 | 20 | 21 | 19 | 23 | 26 | 23 | 27 | 31 | 27 | 27 | 30 | 22 | 26 | 26 | 22 | 23 | 26 | 24 |
Feels °C | 18 | 16 | 15 | 18 | 19 | 16 | 21 | 23 | 21 | 22 | 27 | 26 | 24 | 26 | 19 | 22 | 21 | 19 | 22 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | SW 6 | SW 4 | W 6 | W 5 | SW 7 | SW 6 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | W 9 | WSW 8 | WSW 8 | WSW 8 | NW 4 |
4 | 2 | 3 | 23 | 5 | 7 | 2 | 7 | 25 | 57 | 74 | 92 | 153 | 136 | 128 | 64 | 57 | 22 | 12 | 11 | 2 | |
Swell 2 Height (m) Direction Period (s) | W 8 | W 8 | WNW 4 | W 8 | SW 6 | W 4 | W 8 | SW 6 | W 8 | W 6 | — | — | WSW 11 | — | — | NW 3 | — | NW 4 | W 10 | W 10 | WSW 7 |
1 | 1 | 3 | 1 | 6 | 2 | 5 | 2 | 1 | 1 | — | — | 24 | — | — | 3 | — | 2 | 2 | 2 | 11 | |
Swell 3 Height (m) Direction Period (s) | — | — | SW 6 | — | W 8 | W 8 | W 10 | W 13 | SW 6 | — | — | — | — | — | — | — | — | — | — | W 10 | — |
— | — | 1 | — | 1 | 1 | 2 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | 2 | — | |
Wind waves Height (m) Direction Period (s) | — | WSW 2 | WSW 4 | — | — | — | ESE 3 | ESE 3 | SE 3 | ESE 3 | ESE 3 | — | — | — | NNW 3 | — | NW 3 | NW 4 | — | N 4 | — |
— | 1 | 4 | — | — | — | 3 | 2 | 1 | 3 | 3 | — | — | — | 1 | — | 3 | 4 | — | 1 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 424 | 360 | 360 | 189 | 190 | 135 | 414 | 340 | 15 | 19 | 14 | 0 | 0 | 151 | 1 | 20 | 190 | 15 | 127 | 415 | 51 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
Information about the Crab Island Surf forecast
The above surf forecast table for Crab Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Crab Island can be found by selecting the local surf guide option on the grey menu. Our Crab Island 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 (Crab Island) 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 Crab Island 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.
Crab Island is 8 km (5 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.











