Surf Forecasts:
Crab Island surf forecast from 27 Jul 2026:
- Most powerful swell: Monday 27 Jul, 4PM (local time) - 3ft (0.9m), 6s period, WSW swell with 70 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 0.9m 6s and forecast to arrive on Monday (Jul 27) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 01) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Mon 27th Jul) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the table for the next couple of weeks.
To be straight with you, it’s a grim start. We’re looking at a real dry spell kicking off from Monday the 27th of July, and it just keeps going. The first surf recommendation doesn’t show up until Monday the 10th of August, so that’s a gap of nearly two weeks with nothing worth paddling out for. The swell is tiny, the wind is messy, and the water temp at Crab Island is sitting at 69°, which is a whopping 9° warmer than usual for this time of year – that’s a full-on anomaly, very unusual.
The only real glimmer of hope in the whole 16-day window lands on Monday the 10th of August. On Monday morning, Crab Island (a reef break) finally gets a pulse of life. We’re looking at a 5 ft swell from the WSW, with a 10-second period. The combined energy hits 411 (moderate wave energy), and the wind swings around to a light offshore from the NNW. That’s going to be clean. The afternoon holds onto that 5 ft WSW swell, energy dropping a touch to 396, but still clean with a cross-offshore breeze from the WNW. This is the standout. It’s not huge, but after nothing for so long, this is the best on offer. The direction is a fair match for the optimum SW swell direction.
Tuesday the 11th of August morning is still surfable, with 3 ft from the WSW, 9-second period, and glassy conditions – a light offshore from the WSW, clean as a whistle. The energy drops to 149 (weak), but for a mellow session it’s fine. The afternoon gets a bit lumpy again with the cross-shore wind picking up.
So, there it is. A long wait, then a brief window of clean, rideable waves around the 10th and 11th of August. After that, it’s back to small, choppy junk. For a spot that’s fairly consistent, this is a real flat spell, but it tends not to stay this poor for long. Stay tuned.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Tue afternoon, min 16°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Sat afternoon, min 12°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
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 6 | WSW 6 | WSW 6 | W 6 | W 5 | WSW 5 | WSW 5 | W 5 | W 10 | W 6 | WSW 6 | W 5 | W 5 | W 6 | W 4 | W 10 | W 5 | WSW 8 | WSW 8 | WSW 8 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 81 | 70 | 45 | 32 | 14 | 8 | 8 | 12 | 8 | 52 | 52 | 22 | 20 | 22 | 6 | 8 | 14 | 13 | 13 | 13 | 13 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross | cross-off | cross-on | cross | cross | cross | cross | off | cross-off | cross | off | cross-off | cross | off | glassy | cross | cross-off |
High Tide | 6:06PM8.20m | 6:27AM8.12m | 6:47PM8.55m | 7:06AM8.42m | 7:24PM8.82m | 7:42AM8.66m | 7:59PM9.04m | 8:16AM8.84m | 8:33PM9.18m | 8:49AM8.96m | 9:07PM9.24m | 9:22AM8.97m | 9:40PM9.18m | ||||||||
Low Tide | 11:49AM2.60m | 00:10AM2.37m | 12:31PM2.27m | 00:51AM2.06m | 1:08PM1.99m | 1:28AM1.79m | 1:43PM1.77m | 2:03AM1.57m | 2:15PM1.60m | 2:37AM1.43m | 2:47PM1.51m | 3:09AM1.37m | 3:18PM1.51m | 3:41AM1.44m | |||||||
 |  |  |  | |  | | | | | | | | | | | | | | | | |
 | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — |
 | — | — | 9:12 | — | — | 9:10 | — | — | 9:08 | — | — | 9:07 | — | — | 9:06 | — | — | 9:05 | — | — | 9:02 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 18 | 18 | 19 | 21 | 19 | 19 | 19 | 17 | 17 | 17 | 16 | 16 | 17 | 15 | 17 | 18 | 16 | 19 | 22 | 19 |
Feels °C | 14 | 15 | 17 | 18 | 20 | 20 | 19 | 17 | 16 | 12 | 12 | 12 | 11 | 11 | 11 | 12 | 13 | 12 | 16 | 19 | 16 |
Swell 1 Height (m) Direction Period (s) | — | — | WSW 6 | W 6 | W 5 | WSW 5 | WSW 5 | W 10 | W 10 | W 10 | W 10 | W 5 | W 5 | W 9 | W 4 | W 4 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | NW 4 |
| kJ | — | — | 45 | 32 | 14 | 8 | 8 | 2 | 8 | 2 | 7 | 22 | 20 | 2 | 6 | 1 | 14 | 13 | 13 | 13 | 4 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 12 | W 8 | W 8 | W 8 | W 10 | W 6 | — | — | W 9 | W 9 | — | W 9 | WSW 8 | — | W 4 | — | — | WSW 8 |
| kJ | — | — | — | 3 | 1 | 1 | 1 | 8 | 1 | — | — | 2 | 2 | — | 2 | 7 | — | 3 | — | — | 13 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 12 | W 11 | W 11 | — | — | — | — | — | — | — | W 11 | W 10 | — | — | — | — | — |
| kJ | — | — | — | — | 3 | 2 | 2 | — | — | — | — | — | — | — | 2 | 8 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 6 | WSW 6 | — | — | — | — | — | W 5 | W 4 | W 6 | WSW 6 | — | — | W 6 | NNW 3 | — | W 5 | NNW 3 | — | — | — |
| kJ | 81 | 70 | — | — | — | — | — | 12 | 7 | 52 | 52 | — | — | 22 | 2 | — | 11 | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 361 | 275 | 122 | 143 | 183 | 135 | 183 | 320 | 141 | 190 | 397 | 190 | 190 | 206 | 384 | 206 | 444 | 376 | 393 | 340 | 51 |
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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