Surf Forecasts:
Crab Island surf forecast from 3 Aug 2026:
- Most powerful swell: Wednesday 5 Aug, 1PM (local time) - 6.5ft (2.0m), 8s period, WSW swell with 486 kJ wave energy.
Best Forecast Surf Conditions for Crab Island this week:
The most powerful waves expected at Crab Island in the next 16 days are 2.0m 8s and forecast to arrive on Wednesday (Aug 05) at 1PM. 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Wed 5th Aug) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s cut to the chase: the 16-day outlook for Crab Island is a tough one. From the start, there’s a long stretch of poor surf, and that gap runs almost the entire forecast period. Don’t expect much.
Starting Monday, August 3rd, we’ve got a 3ft swell from the WSW with a short period of 9 seconds. The combined energy is weak at 84. Wind is cross-on from the SE, making it choppy. It’s poor. Tuesday the 4th brings a little more size, 3ft, but the period drops to 7 seconds, and the wind is cross-on from the SW. Energy hits 111 (moderate), but it’s still messy with a fresh breeze. Wednesday the 5th sees the biggest swell of the period – 6ft from the WSW, period of 8 seconds, and energy jumping to 452 (strong). But the wind is a strong cross-shore from the W at 19 mph, creating lumpy cross-chop. That’s kite territory, not paddle surfing.
Thursday morning the 6th offers a clean window: 5ft from the W with a cross-offshore wind from the WNW. Energy is 176 (moderate). It’s clean, but the swell is weak and short-period. Friday and Saturday drop off fast, with tiny waves under 2ft and poor wind. The rest of the first week and into the second week is flat. From Sunday the 9th through to Tuesday the 18th of August, we’re looking at swell heights below 1ft, mostly 0.3ft to 0.7ft, with energy values in the single digits or low teens. The best you’ll see is a few glassy moments on the 9th and 10th, but with no swell, it’s just a mirror.
There are no true standouts. Thursday morning, August 6th, is the cleanest of the bunch, but the waves are too small. The rest of the 16 days is a dud. Crab Island is a reef break that’s fairly consistent, but with this weak swell and bad wind, it’s a no-go. Crowds are possible, but right now you’ll have it to yourself. Water temperature is about average for this time of year.
Tough one, folks. Keep an eye out, but for now, the boards can stay in the garage.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue morning. Warm (max 24°C on Mon afternoon, min 15°C on Tue night). Winds increasing (light winds from the S on Sun night, fresh winds from the WSW by Tue night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Fri afternoon, min 14°C on Wed night). Winds decreasing (fresh winds from the W on Wed night, calm by Thu night). | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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 9 | WSW 9 | WSW 8 | WSW 7 | WSW 7 | WSW 7 | WSW 8 | WSW 7 | W 7 | W 7 | W 6 | WSW 6 | W 5 | WSW 5 | W 9 | W 9 | W 9 | WSW 9 | SW 8 | SW 7 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 84 | 65 | 45 | 111 | 138 | 218 | 452 | 376 | 225 | 176 | 76 | 33 | 14 | 8 | 6 | 6 | 6 | 8 | 17 | 14 | 7 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross | cross-off | cross-on | cross-on | cross-off | cross | cross | cross-off | glassy | cross | off |
High Tide | 9:54AM8.86m | 10:13PM9.00m | 10:28AM8.65m | 10:49PM8.70m | 11:05AM8.34m | 11:30PM8.31m | 11:51AM7.95m | 00:25AM7.86m | 12:55PM7.55m | 1:42AM7.49m | 2:26PM7.40m | 3:17AM7.49m | 3:58PM7.72m | ||||||||
Low Tide | 3:50PM1.63m | 4:14AM1.63m | 4:23PM1.85m | 4:49AM1.92m | 5:02PM2.18m | 5:31AM2.32m | 5:52PM2.60m | 6:29AM2.77m | 7:06PM3.01m | 7:54AM3.09m | 8:47PM3.09m | 9:32AM2.97m | 10:18PM2.69m | ||||||||
 | |  |  |  |  | | | | | | | | |  | | | |  | | | |
 | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — | 5:50 | — | — |
 | — | — | 9:00 | — | — | 9:00 | — | 8:58 | — | — | 8:55 | — | — | 8:53 | — | — | 8:52 | — | — | 8:51 | — |
mm | — | — | — | 2 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 24 | 19 | 19 | 19 | 17 | 17 | 17 | 17 | 16 | 17 | 15 | 17 | 18 | 16 | 18 | 18 | 17 | 19 | 21 | 18 |
Feels °C | 20 | 21 | 18 | 17 | 15 | 12 | 11 | 11 | 11 | 11 | 13 | 12 | 14 | 15 | 14 | 14 | 14 | 15 | 18 | 18 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 9 | WSW 8 | — | — | — | — | — | W 13 | — | W 12 | WSW 6 | W 5 | WSW 5 | WSW 5 | W 9 | W 9 | WSW 9 | W 5 | SW 7 | SW 7 |
| kJ | 84 | 65 | 45 | — | — | — | — | — | 3 | — | 3 | 33 | 14 | 8 | 4 | 6 | 6 | 8 | 8 | 14 | 7 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 10 | W 9 | W 9 | W 9 | — | — | W 9 | SW 8 | W 8 | W 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 6 | 6 | — | — | 6 | 17 | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 12 | W 12 | — | W 12 | — | — | — | W 8 | — | W 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 6 | 3 | — | 3 | — | — | — | 1 | — | 1 |
Wind waves Height (m) Direction Period (s) | — | — | — | WSW 7 | WSW 7 | WSW 7 | WSW 8 | WSW 7 | W 7 | W 7 | W 6 | — | — | — | — | W 4 | — | W 4 | — | W 5 | — |
| kJ | — | — | — | 111 | 138 | 218 | 452 | 376 | 225 | 176 | 76 | — | — | — | — | 2 | — | 2 | — | 12 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 86 | 20 | 351 | 320 | 368 | 416 | 320 | 397 | 487 | 361 | 374 | 364 | 386 | 364 | 414 | 360 | 189 | 21 | 190 | 360 |
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