Surf Forecasts:
Crab Island surf forecast from 10 Jul 2026:
- Most powerful swell: Friday 10 Jul, 10AM (local time) - 1.5ft (0.5m), 9s period, W swell with 42 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 10AM. Winds are predicted to be cross-onshore 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 | 10AM (Fri 10th Jul) | 1.5ft (0.5m) 9s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
Alright, let’s get straight into it. The outlook for Crab Island is a tough one, folks. Over the next 16 days, there’s just no real surf to get excited about. The swell is tiny, the energy is weak, and we’re looking at a long stretch of flat, unrideable conditions.
Right from the start, Friday the 10th of July, we’ve got a tiny 2ft swell out of the west, with a weak 43 (combined energy) and a 9-second period. The wind is cross-on in the morning but swings cross-off in the afternoon, making it clean. But honestly, that’s a poor surf day. The swell is just too small to do anything with.
Saturday the 11th is even smaller. The swell drops to 1.0ft from the WSW, with a period of just 7 seconds and energy down to 18. The afternoon goes glassy, which is a beautiful thing to see, but with next to no wave height, it’s just a flat, pretty ocean. This poor run continues for days. From Sunday the 12th all the way through to Thursday the 23rd of July, the swell barely pushes above 0.7ft, the energy is in the single digits or low teens, and the periods are mostly short or very long. The swells are either too weak or too long in period to break properly on a reef setup like this.
Now, there’s a tiny flicker of something on Friday the 24th of July. The swell bumps up to 2ft from the west, with a period of 6 seconds and energy reaching 38. Saturday the 25th sees a similar 3ft swell, also from the west, with energy at 58. But the wind is cross-onshore and choppy both days. The combination of a weak, short-period swell and choppy conditions means the surf will be poor. It’s not worth paddling out for.
For a break like Crab Island, which is a fairly consistent reef, this blank run is a real bummer. It’s exposed to the swell, but the forecast just isn’t delivering. With the swell so small and the energy so weak, this setup looks more interesting for kite surfing than paddle surfing. The water temp is about average for the time of year, nothing to write home about.
Hang in there, but don’t plan a session around this one. The forecast can change, but right now, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Fri afternoon, min 17°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Tue afternoon, min 14°C on Sun night). Winds decreasing (fresh winds from the ENE on Sun night, light winds from the E by Wed afternoon). | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||
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 9 | W 8 | WSW 7 | WSW 8 | WSW 8 | E 4 | E 4 | W 8 | E 4 | E 4 | SW 15 | SW 18 | WSW 11 | E 4 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 42 | 40 | 37 | 9 | 13 | 6 | 12 | 12 | 1 | 24 | 15 | 8 | 12 | 12 | 12 | 10 | 10 | 10 | 8 | 8 | 8 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | cross-off | on | off |
High Tide | 2:51PM7.69m | 3:31AM7.90m | 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 | ||||||||
Low Tide | 8:27AM2.68m | 9:05PM2.71m | 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 | |||||||
 | |  | | |  | | | |  | | | | |  | | | |  |  |  | |
 | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — |
 | — | — | 9:31 | — | — | 9:30 | — | — | 9:30 | — | — | 9:29 | — | — | 9:28 | — | — | 9:27 | — | — | 9:25 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | 4 |
Temp °C | 27 | 31 | 27 | 27 | 31 | 26 | 26 | 29 | 23 | 24 | 29 | 25 | 26 | 30 | 26 | 28 | 26 | 25 | 21 | 24 | 21 |
Feels °C | 26 | 31 | 25 | 25 | 29 | 21 | 23 | 25 | 16 | 19 | 25 | 19 | 23 | 27 | 19 | 26 | 23 | 24 | 22 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 8 | 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 | W 9 |
| kJ | 42 | 40 | 37 | 9 | 13 | 6 | 5 | 1 | 1 | 7 | 15 | 3 | 2 | 12 | 10 | 9 | 8 | 8 | 7 | 7 | 6 |
Swell 2 Height (m) Direction Period (s) | — | — | — | WSW 8 | — | — | W 16 | — | — | — | SW 15 | SW 15 | SW 18 | SW 18 | SW 6 | SW 16 | SW 16 | SW 6 | SW 14 | SW 14 | SW 15 |
| kJ | — | — | — | 7 | — | — | 5 | — | — | — | 8 | 8 | 12 | 12 | 2 | 10 | 10 | 1 | 8 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 8 | W 8 | W 8 | — | W 14 | SW 14 | SW 6 | SW 6 | SW 16 | SW 6 | SW 5 | — |
| kJ | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | 4 | 7 | 1 | 1 | 10 | 1 | 1 | — |
Wind waves Height (m) Direction Period (s) | SW 4 | — | — | E 3 | E 3 | E 3 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | E 3 | E 3 | E 4 | E 3 | E 3 | ENE 3 | E 3 | E 3 | E 3 |
| kJ | 1 | — | — | 2 | 1 | 8 | 12 | 12 | 27 | 24 | 9 | 9 | 5 | 8 | 12 | 3 | 2 | 9 | 5 | 3 | 8 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 15 | 20 | 88 | 94 | 127 | 402 | 421 | 454 | 341 | 73 | 135 | 84 | 127 | 135 | 86 | 159 | 88 | 138 | 175 | 176 |
Best forecast wave conditions in Wales - Gower | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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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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