Surf Forecasts:
Crab Island surf forecast from 9 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 Tuesday (Jul 14) 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, Rusty here. Let's have a look at this 16-day stretch.
Honestly, mate, it’s a tough run. The forecast for Crab Island is pretty flat for the vast majority of the period. We’re looking at a solid two weeks of near-nothing. The swell is just tiny, with the combined energy sitting in the low double digits most days – we’re talking 20, 16, 13 – that’s weak, weak energy. There’s a long gap here where there’s just nothing worth paddling out for.
The first real, albeit small, pulse doesn't show up until the very end of the outlook. On Friday, July 24th, there’s a bump in the numbers. We see a 4 ft swell from the west with a period of 6 seconds. The combined energy jumps to 95, which is still on the lower side of moderate, but it’s the biggest reading we’ve got. The wind is light and cross-shore from the WSW, so it won't be a complete mess, but with that short period, don't expect any real power or shape. It’s the best of a bad bunch, but it’s not a standout by any real standard.
Honestly, a lot of these conditions look more suited to a kite than a surfboard. With the swell being so small and the wind often being cross or cross-off, you’ll be doing a lot of waiting for nothing. The water temp is about average for this time of year, nothing to report there.
The one saving grace is that the spot is a fairly consistent reef, so it’s not a complete write-off for the area, but this forecast is a dud. Keep an eye on it, forecasts can change, but right now, I’d save the wax.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Fri afternoon, min 15°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 31°C on Tue afternoon, min 14°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | |||||||||||||||
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 10 | W 10 | W 9 | W 9 | W 9 | W 8 | WSW 7 | WSW 8 | E 3 | E 3 | E 4 | W 8 | E 4 | E 4 | W 15 | E 4 | E 4 | ESE 4 | E 4 | E 4 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 17 | 16 | 16 | 42 | 40 | 37 | 9 | 13 | 7 | 8 | 9 | 1 | 13 | 15 | 4 | 27 | 14 | 22 | 27 | 14 | 10 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | cross-on | off | cross-off | cross-on | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross | cross | cross | cross | cross | glassy |
High Tide | 1:35PM7.64m | 2:14AM7.80m | 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 | ||||||||
Low Tide | 7:14AM2.62m | 7:46PM2.80m | 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 | |||||||
 | |  | | | | | | | |  |  | |  | | | |  |  | | | |
 | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — |
 | — | — | 9:31 | — | — | 9:31 | — | — | 9:30 | — | — | 9:30 | — | — | 9:29 | — | — | 9:28 | — | — | 9:27 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 4 | 4 | 6 |
Temp °C | 21 | 25 | 23 | 26 | 31 | 28 | 28 | 30 | 27 | 25 | 28 | 22 | 24 | 29 | 23 | 26 | 31 | 24 | 22 | 24 | 19 |
Feels °C | 20 | 24 | 21 | 26 | 30 | 27 | 27 | 29 | 24 | 21 | 24 | 15 | 18 | 24 | 16 | 21 | 26 | 18 | 22 | 24 | 19 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 5 | W 9 | W 9 | W 9 | W 8 | WSW 7 | WSW 8 | WSW 8 | W 8 | W 8 | W 8 | W 19 | SW 19 | W 15 | W 12 | W 11 | W 10 | W 10 | W 9 | WSW 9 |
| kJ | 17 | 4 | 16 | 42 | 40 | 37 | 9 | 13 | 6 | 5 | 1 | 1 | 7 | 15 | 4 | 3 | 9 | 8 | 8 | 7 | 8 |
Swell 2 Height (m) Direction Period (s) | W 4 | W 10 | W 5 | — | — | — | WSW 8 | — | — | W 16 | — | — | W 8 | W 15 | W 13 | SW 18 | SW 18 | SW 14 | SW 16 | SW 16 | SW 16 |
| kJ | 3 | 16 | 2 | — | — | — | 7 | — | — | 5 | — | — | 1 | 4 | 3 | 12 | 12 | 7 | 10 | 10 | 10 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 8 | W 8 | — | W 14 | — | — | — | SW 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 4 | — | — | — | 7 |
Wind waves Height (m) Direction Period (s) | — | — | — | SW 4 | — | — | — | ENE 2 | E 3 | E 3 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | ESE 4 | E 4 | E 4 | ESE 3 |
| kJ | — | — | — | 1 | — | — | — | 1 | 7 | 8 | 9 | 18 | 13 | 12 | 27 | 27 | 14 | 22 | 27 | 14 | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 51 | 189 | 51 | 15 | 15 | 20 | 51 | 153 | 72 | 135 | 141 | 369 | 426 | 414 | 136 | 73 | 73 | 112 | 136 | 152 | 120 |
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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