Surf Forecasts:
Crab Island surf forecast from 11 Jul 2026:
- Most powerful swell: Monday 13 Jul, 4AM (local time) - 3.5ft (1.0m), 4s period, E swell with 33 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 1.0m 4s and forecast to arrive on Monday (Jul 13) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Jul 13) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Mon 13th Jul) | 3.5ft (1.0m) 4s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
Alright, let’s call it like it is. Crab Island is flat-out quiet for the next 16 days. Every single session from Saturday the 11th of July through Sunday the 26th comes up with zero-quality surf — all poor conditions, no scores worth talking about.
We’re talking a long, empty stretch. Swell is tiny, barely a ripple most days — 0.3ft to 1ft at best — and when it does show, the wind’s usually junk: cross-shore or onshore, often with a moderate breeze making a mess. You get a couple of glassy moments, like Saturday afternoon and again on Sunday the 19th, but the wave energy is so weak (combined energy of 13 and then 1) you could paddle on a pond.
Swell directions bounce around from WSW, SW, W, and even some east, but the period’s all over — real short 4-second stuff or long 16-second lines that arrive with no size. Energy readings stay weak, all under 31. Offshore wind is rare; most of the time it’s cross or cross-off, and even the clean windows have nothing to ride.
If you’re into kiteboarding, a few of those breezy afternoons with 12-18 mph winds and some chop could be your thing. But for surfing? Don’t bother. This is one of those normal dry spells for Crab Island. Forecasts can always turn, but right now, you’re on the beach.
Stay patient.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Sun afternoon, min 15°C on Sun night). Winds increasing (calm on Sat afternoon, strong winds from the ENE by Sun night). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Wed night. Warm (max 29°C on Tue afternoon, min 16°C on Mon night). Winds decreasing (fresh winds from the ENE on Tue night, calm by Wed night). | ||||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
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 | WSW 8 | WSW 8 | W 16 | E 4 | W 8 | E 4 | SW 19 | SW 15 | W 11 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | SW 7 | SW 7 | SW 6 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 9 | 13 | 6 | 5 | 12 | 1 | 19 | 15 | 8 | 12 | 12 | 10 | 19 | 16 | 16 | 8 | 8 | 9 | 7 | 7 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:08PM8.00m | 4:45AM8.22m | 5:17PM8.49m | 5:52AM8.65m | 6:19PM8.99m | 6:52AM9.05m | 7:15PM9.41m | 7:47AM9.35m | 8:07PM9.66m | 8:37AM9.47m | 8:55PM9.74m | 9:23AM9.43m | 9:40PM9.63m | ||||||||
Low Tide | 9:43AM2.51m | 10:21PM2.39m | 10:54AM2.17m | 11:29PM1.95m | 11:58AM1.75m | 00:32AM1.52m | 12:56PM1.39m | 1:30AM1.17m | 1:50PM1.13m | 2:24AM0.97m | 2:39PM1.03m | 3:12AM0.94m | 3:24PM1.08m | 3:55AM1.08m | |||||||
 | |  | | | | |  |  |  | | | |  |  | | | |  | | | |
 | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — |
 | — | — | 9:30 | — | — | 9:30 | — | — | 9:29 | — | — | 9:28 | — | — | 9:27 | — | — | 9:25 | — | — | 9:24 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 1 | 2 | 2 | 2 | 3 | — |
Temp °C | 27 | 30 | 27 | 27 | 31 | 23 | 24 | 28 | 24 | 23 | 29 | 24 | 24 | 27 | 21 | 19 | 22 | 19 | 19 | 22 | 18 |
Feels °C | 25 | 28 | 24 | 24 | 26 | 16 | 19 | 25 | 18 | 20 | 26 | 17 | 23 | 25 | 22 | 18 | 21 | 19 | 18 | 20 | 16 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | WSW 8 | WSW 8 | W 8 | W 8 | W 8 | W 19 | SW 19 | W 12 | W 11 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | SW 7 | SW 7 | SW 6 | NW 4 |
| kJ | 9 | 13 | 6 | 1 | 1 | 1 | 7 | 15 | 3 | 10 | 12 | 10 | 19 | 16 | 16 | 7 | 7 | 9 | 7 | 6 | 2 |
Swell 2 Height (m) Direction Period (s) | WSW 8 | — | — | W 16 | — | — | — | SW 15 | SW 15 | SW 18 | SW 18 | SW 14 | SW 16 | SW 8 | SW 7 | SW 6 | SW 6 | W 9 | WSW 8 | W 8 | SW 6 |
| kJ | 7 | — | — | 5 | — | — | — | 8 | 8 | 12 | 12 | 7 | 10 | 2 | 2 | 2 | 1 | 6 | 6 | 5 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 8 | W 8 | W 8 | — | W 14 | — | S 7 | S 6 | SW 16 | SW 14 | SW 14 | SW 15 | W 3 | SW 13 | W 8 |
| kJ | — | — | — | — | — | — | 1 | 1 | 1 | — | 4 | — | 1 | 1 | 10 | 8 | 8 | 8 | 1 | 7 | 5 |
Wind waves Height (m) Direction Period (s) | E 2 | — | E 3 | E 3 | E 4 | E 4 | E 4 | E 4 | E 4 | E 3 | E 3 | E 4 | E 2 | — | WNW 3 | — | WSW 2 | SW 3 | WNW 3 | W 3 | — |
| kJ | 1 | — | 5 | 5 | 12 | 26 | 19 | 9 | 18 | 8 | 6 | 13 | 1 | — | 1 | — | 1 | 3 | 1 | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 86 | 121 | 86 | 135 | 222 | 369 | 426 | 416 | 135 | 73 | 83 | 86 | 73 | 83 | 202 | 307 | 177 | 51 | 319 | 619 | 510 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.
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