Surf Forecasts:
Crab Island surf forecast from 6 Jul 2026:
- Most powerful swell: Friday 10 Jul, 1PM (local time) - 1.5ft (0.5m), 9s period, W swell with 40 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 0.5m 9s and forecast to arrive on Friday (Jul 10) at 1PM. 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 Sunday (Jul 12) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Fri 10th Jul) | 1.5ft (0.5m) 9s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
Updates in hr min s Forecast update imminent
Alright folks, Rusty here. Let’s have a look at what’s coming down the pipe for Crab Island. Gotta be straight with you – it’s a pretty bleak stretch ahead. There’s barely a whisper of surf for the first couple of weeks, so we’re looking at a long gap with nothing worth paddling out for.
We start off on Monday, 6 July, and honestly, it’s a write-off. Tiny 1 ft to 2 ft swell from the west, short periods, and cross-onshore winds making a mess of things. That poor surf continues day after day through the 7th, 8th, 9th, 10th, 11th, and 12th – mostly small, weak, and choppy. No score worth mentioning. The water temp is about average for this time of year, nothing special.
Then there’s a stretch from the 13th to the 16th where we get some glassy or clean conditions, but the swell is essentially flat – less than 1 ft. That’s just not surfable. You’d be better off on a stand-up paddleboard.
Finally, around the 17th we see a bit more life: 2 ft to 3 ft from the west-southwest on Friday, and it picks up into Saturday, 18 July – 4 ft from the west, period around 6 seconds, and clean cross-offshore winds. The combined energy jumps to 116 (moderate) by Saturday morning. Still, the wave quality is marked poor and scores are zero, so it’s not something to get excited about. The swell direction (W) matches the optimum direction (SW) fairly closely, but the period is short and the size is small.
The one that might raise an eyebrow is Tuesday, 21 July – that’s over two weeks away, so take it with a pinch of salt. Early morning we get 5 ft from the west-southwest, period 7 seconds, with offshore wind and a combined energy of 375 (strong). The guidance rates this as “expect good surf conditions” with a score of 2 out of 10 – so not a standout, but the best of a bad bunch. The swell direction is a good match, and the wind is offshore, so it could be clean. But remember, that’s way out in the forecast, so don’t bank on it just yet.
Everything else is tiny or messy. For the whole 16-day window, there’s no true standout – the 21st is the closest thing to hope. If you’re itching for waves, better look elsewhere or wait for a change in the charts.
Stay tuned, and as always – keep an eye on the horizon.
Rusty
Short Range ForecastMostly dry. Warm (max 23°C on Wed afternoon, min 14°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 32°C on Sat afternoon, min 19°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 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 9 | W 5 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | W 8 | W 10 | W 10 | W 9 | W 9 | WSW 9 | W 9 | WSW 8 | E 4 | WSW 8 | E 4 | W 8 | E 4 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 13 | 19 | 14 | 15 | 15 | 13 | 14 | 13 | 17 | 16 | 15 | 15 | 27 | 39 | 22 | 24 | 13 | 12 | 4 | 9 | 1 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | cross-off | cross-on | cross | cross-off | cross-on | cross-off | cross-off | cross | cross-on | cross-off | cross | cross-on | cross | cross | cross-off | cross-off |
High Tide | 10:56AM8.20m | 11:19PM8.35m | 11:39AM7.99m | 00:06AM8.12m | 12:30PM7.78m | 1:04AM7.90m | 1:35PM7.64m | 2:14AM7.80m | 2:51PM7.69m | 3:31AM7.90m | 4:08PM8.00m | 4:45AM8.22m | 5:17PM8.49m | ||||||||
Low Tide | 4:42AM2.03m | 4:52PM2.26m | 5:24AM2.22m | 5:38PM2.47m | 6:13AM2.43m | 6:34PM2.68m | 7:14AM2.62m | 7:46PM2.80m | 8:27AM2.68m | 9:05PM2.71m | 9:43AM2.51m | 10:21PM2.39m | 10:54AM2.17m | 11:29PM1.95m | |||||||
 |  |  |  | |  | | | | | | | | | | | | | | | | |
 | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — |
 | — | — | 9:34 | — | — | 9:34 | — | — | 9:32 | — | — | 9:31 | — | — | 9:31 | — | — | 9:30 | — | — | 9:30 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 18 | 16 | 20 | 21 | 21 | 22 | 23 | 22 | 24 | 28 | 26 | 29 | 31 | 27 | 29 | 32 | 28 | 28 | 32 | 24 |
Feels °C | 15 | 16 | 15 | 18 | 18 | 21 | 23 | 22 | 22 | 26 | 27 | 25 | 27 | 30 | 27 | 29 | 31 | 28 | 24 | 29 | 18 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 8 | WSW 4 | W 5 | WSW 9 | WSW 8 | WSW 8 | W 8 | W 10 | W 10 | W 9 | W 9 | WSW 9 | W 9 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | W 8 | W 8 | W 8 |
| kJ | 13 | 12 | 7 | 7 | 15 | 13 | 14 | 13 | 17 | 16 | 15 | 15 | 27 | 39 | 22 | 22 | 13 | 11 | 4 | 1 | 1 |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 8 | WSW 9 | W 11 | W 4 | — | — | — | — | — | NW 4 | NW 4 | — | — | — | — | — | — | — | — |
| kJ | — | — | 14 | 15 | 2 | 1 | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 10 | — | — | — | — | — | — | — | W 13 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 2 | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 5 | W 5 | — | — | WSW 4 | — | — | — | — | — | — | — | E 3 | E 3 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | ENE 4 |
| kJ | 13 | 19 | — | — | 7 | — | — | — | — | — | — | — | 5 | 6 | 17 | 24 | 9 | 12 | 12 | 9 | 20 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 183 | 183 | 183 | 190 | 206 | 86 | 72 | 190 | 51 | 72 | 189 | 51 | 15 | 45 | 51 | 7 | 189 | 112 | 412 | 141 | 289 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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