Surf Forecasts:
Crab Island surf forecast from 6 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 7AM (local time) - 1.5ft (0.5m), 11s period, W swell with glassy winds.
- Most powerful swell: Wednesday 12 Aug, 7PM (local time) - 2.5ft (0.8m), 10s period, WSW swell with 120 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 7AM (local time) - 1.5ft (0.5m), 11s period with W 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 7AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.2m and 7s. Another secondary swell of 0.2m and 6s is also forecast. 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 0.8m 10s and forecast to arrive on Wednesday (Aug 12) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 12th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 7AM (Wed 12th Aug) | 1.5ft (0.5m) 11s |
| Most Powerful | 7PM (Wed 12th Aug) | 2.5ft (0.8m) 10s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer for Crab Island over the next couple of weeks.
First off, I’ve got to be straight with you – the start of this period is a write-off. Thursday the 6th through to Tuesday the 11th of August, there’s just nothing worth paddling out for. The swell is tiny, the period is short, and the wind is all over the shop. You’d be better off cleaning the wax off your board.
We finally see a flicker of life on the morning of Wednesday the 12th. The wind goes glassy, which is a beautiful thing, and there’s a tiny 2ft swell from the WSW with a 10-second period. The combined energy is weak at 81, so it’s not going to be pumping, but it’ll be clean. That’s your only real window for a paddle in the first week.
The next decent chance comes on Saturday the 15th of August. The morning looks the pick with a 4ft WSW swell, a 7-second period, and a clean cross-offshore breeze from the WNW. The combined energy bumps up to 152, which is moderate. The water temp is a very unusual 69°, a whopping 8° warmer than normal, so you might not even need a wetsuit. This is the best of a pretty average bunch.
Then things get a bit messy. Sunday the 16th has a bit more size at 4ft, but the wind is onshore and the period is short. Monday the 17th is a write-off with strong winds and a risk of thunderstorms.
Now, for the long-range punters, keep an eye on Wednesday the 19th of August. The swell jumps to a solid 7ft from the WSW, but it’s short-period at 7 seconds. The combined energy is strong at 487, but the wind is a messy cross-onshore, making it poor for a paddle. This is more of a kite-surfing setup than a clean surf session. This size is for experienced crew only.
The morning of Thursday the 20th is marginal, with a 6ft swell and a cross-shore breeze, but it’s not clean. And then Friday the 21st of August offers a small, clean 3ft swell from the WSW to finish the run.
Overall, it’s a lean period. The only real standout is the morning of Saturday the 15th of August at Crab Island. It’s the best combination of clean conditions and a bit of push. The rest is either flat, windy, or messy. Don’t hold your breath.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Sat afternoon, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Tue afternoon, min 17°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 6 | W 6 | W 5 | W 9 | W 5 | SW 12 | W 9 | W 9 | WSW 7 | WSW 7 | WSW 6 | WSW 6 | WSW 5 | W 5 | W 5 | W 8 | W 10 | WSW 12 | WSW 10 | WSW 10 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 76 | 43 | 14 | 7 | 7 | 5 | 2 | 2 | 5 | 9 | 16 | 4 | 15 | 20 | 4 | 5 | 7 | 14 | 80 | 98 | 116 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-on | cross | off | cross-on | cross | cross-off | cross-off | cross | cross-off | cross | cross | off | cross-on | cross | glassy | glassy | cross | cross-off |
High Tide | 11:51AM7.95m | 00:25AM7.86m | 12:55PM7.55m | 1:42AM7.49m | 2:26PM7.40m | 3:17AM7.49m | 3:58PM7.72m | 4:41AM7.93m | 5:13PM8.36m | 5:50AM8.55m | 6:15PM9.02m | 6:47AM9.10m | 7:08PM9.53m | ||||||||
Low Tide | 5:52PM2.60m | 6:29AM2.77m | 7:06PM3.01m | 7:54AM3.09m | 8:47PM3.09m | 9:32AM2.97m | 10:18PM2.69m | 10:52AM2.46m | 11:32PM2.07m | 11:58AM1.85m | 00:33AM1.47m | 12:53PM1.33m | 1:26AM1.04m | ||||||||
 | |  | | | |  | | | | | | | | | | |  | | | | |
 | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — | 5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — |
 | — | 8:55 | — | — | 8:53 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 17 | 17 | 15 | 18 | 20 | 19 | 21 | 21 | 19 | 21 | 23 | 21 | 22 | 24 | 22 | 22 | 23 | 20 |
Feels °C | 11 | 11 | 12 | 14 | 14 | 13 | 16 | 17 | 16 | 17 | 17 | 18 | 19 | 20 | 18 | 21 | 21 | 21 | 20 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | W 5 | WSW 5 | W 9 | W 4 | W 4 | — | WSW 7 | WSW 7 | W 8 | WSW 3 | WSW 5 | WSW 6 | W 5 | W 8 | W 10 | WSW 12 | WSW 10 | WSW 10 | WSW 9 |
| kJ | 2 | 8 | 14 | 5 | 6 | 3 | 1 | — | 5 | 9 | 1 | 2 | 15 | 4 | 4 | 5 | 7 | 14 | 80 | 98 | 116 |
Swell 2 Height (m) Direction Period (s) | — | — | W 10 | W 9 | SW 6 | W 9 | W 9 | W 9 | — | — | — | WSW 6 | W 6 | W 8 | WSW 6 | SW 6 | SW 6 | W 8 | — | — | — |
| kJ | — | — | 7 | 7 | 1 | 2 | 2 | 2 | — | — | — | 4 | 3 | 1 | 3 | 1 | 1 | 5 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 12 | W 12 | — | SW 12 | — | SW 8 | W 9 | — | — | W 8 | W 8 | — | W 8 | W 10 | — | SW 6 | — | — | — |
| kJ | — | — | 6 | 3 | — | 5 | — | 2 | 2 | — | — | 1 | 1 | — | 1 | 2 | — | 1 | — | — | — |
Wind waves Height (m) Direction Period (s) | W 6 | W 6 | — | — | W 5 | — | — | — | — | — | WSW 6 | — | — | W 5 | — | — | — | — | SE 6 | — | W 3 |
| kJ | 76 | 43 | — | — | 7 | — | — | — | — | — | 16 | — | — | 20 | — | — | — | — | 1 | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 206 | 385 | 351 | 351 | 367 | 364 | 202 | 202 | 190 | 361 | 206 | 189 | 183 | 437 | 190 | 190 | 427 | 51 | 0 | 183 | 0 |
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
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Crab Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest