Surf Forecasts:
Crab Island surf forecast from 8 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 0.8m 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 | 10AM (Fri 10th Jul) | 1.5ft (0.5m) 9s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
Alright folks, Rusty here. Let's cut to the chase. We've got a flat run ahead of us for the next couple of weeks. There's no standout swell to get excited about, so we're looking at a long stretch of small, weak waves. It's one of those periods where you might just want to save the gas money for a while.
We're starting off with a blank. The first opportunity to even think about a paddle comes on Wednesday morning at Crab Island, but don't get your hopes up. It's a small 1ft groundswell from the WSW, but the swell energy is a measly (23), and it's labeled as poor surf conditions. On the plus side, the wind is glassy from the south at just 3 mph, so the water will be like a mirror. The water temp is pretty average for this time of year, nothing weird going on there.
Thursday morning looks similar with that same 1ft swell, glassy calm winds, but the energy is still weak (32). The wait between sets will be long because the period is 10 seconds. It's not going to be rideable.
The pattern just continues with tiny, weak swell all through the first week and into the second. By Thursday, July 17th the swell drops to a desperate 0.7ft. It’s a long, dry spell.
The only real change in character happens around Sunday, July 12th and Monday, July 13th. We get a quick little bump from the east, up to 3ft. But the period is a dreadful 4 seconds—that’s pure wind chop, not surf. It’s basically just messy whitewater. The wind is cross-offshore at 16 mph, so it’ll be clean on the surface, but the wave energy is still weak (27). Not worth a paddle.
There is another very brief spike on Thursday, July 16th with a 3ft, 4-second windswell from the east, combined with a nice offshore NNE wind at 12 mph. That’s clean, but again, the period is just too short to produce any proper shape. The energy is still low (40).
After that, it fades away completely. From Friday, July 17th all the way through to the end of the forecast on Thursday, July 23rd, we are looking at swell heights between 0.3ft and 1ft. There is simply no surfable energy at all. It's a total flat spell for over a week.
Bottom line: Crab Island is a reef break that needs a proper SW groundswell to do its thing, and that just isn't showing up. There's nothing to recommend here. The whole 16-day window is a washout for surfing.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Fri afternoon, min 16°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Sat afternoon, min 12°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | |||||||||||||||
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 8 | WSW 8 | WSW 10 | WSW 10 | W 10 | W 9 | W 9 | W 9 | W 8 | WSW 7 | WSW 8 | WSW 8 | E 4 | E 4 | W 8 | E 4 | SW 19 | E 4 | E 4 | E 4 | ESE 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 23 | 24 | 32 | 31 | 16 | 16 | 42 | 40 | 35 | 9 | 13 | 6 | 16 | 12 | 1 | 12 | 15 | 23 | 35 | 15 | 20 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | glassy | cross | cross-off | cross-on | cross-off | cross-off | cross | glassy | cross | cross-off | cross-off | cross-off | cross | cross | cross-off | cross | cross-off | cross-off |
High Tide | 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 | 5:52AM8.65m | 6:19PM8.99m | 6:52AM9.05m | 7:15PM9.41m | ||||||||
Low Tide | 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 | 11:58AM1.75m | 00:32AM1.52m | 12:56PM1.39m | 1:30AM1.17m | |||||||
 | |  | | | | | | | | |  |  | | | | | | | | | |
 | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — |
 | — | — | 9:32 | — | — | 9:31 | — | — | 9:31 | — | — | 9:30 | — | — | 9:30 | — | — | 9:29 | — | — | 9:28 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 22 | 19 | 21 | 25 | 23 | 25 | 30 | 28 | 27 | 30 | 26 | 24 | 28 | 23 | 21 | 28 | 24 | 25 | 31 | 27 |
Feels °C | 20 | 21 | 18 | 20 | 24 | 22 | 25 | 30 | 27 | 25 | 29 | 20 | 20 | 23 | 16 | 17 | 25 | 17 | 21 | 26 | 21 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | WSW 8 | WSW 10 | WSW 10 | W 10 | W 9 | W 9 | W 9 | W 8 | WSW 7 | WSW 8 | WSW 8 | W 8 | W 8 | W 8 | W 19 | SW 19 | SW 15 | SW 18 | W 11 | W 10 |
| kJ | 23 | 24 | 32 | 31 | 16 | 16 | 42 | 40 | 35 | 9 | 13 | 6 | 1 | 1 | 1 | 7 | 15 | 8 | 12 | 9 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | W 4 | W 4 | W 5 | WNW 4 | — | — | — | WSW 8 | — | — | W 16 | — | — | — | W 15 | — | W 12 | SW 18 | SW 14 |
| kJ | — | — | 1 | 1 | 4 | 4 | — | — | — | 7 | — | — | 5 | — | — | — | 4 | — | 3 | 12 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | W 8 | W 8 | — | — | W 14 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | 1 | 1 | — | — | 4 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | E 2 | E 3 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | ESE 4 |
| kJ | — | — | — | — | — | — | — | — | — | 1 | 1 | 12 | 16 | 12 | 14 | 12 | 9 | 23 | 35 | 15 | 20 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 72 | 316 | 189 | 51 | 189 | 51 | 15 | 15 | 51 | 88 | 121 | 88 | 421 | 202 | 345 | 222 | 178 | 135 | 395 | 83 | 319 |
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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