Surf Forecasts:
Crab Island surf forecast from 25 Jul 2026:
- Best quality surf: Sunday 26 Jul, 10PM (local time) - 4.5ft (1.3m), 7s period, W swell with cross-offshore winds.
- Most powerful swell: Sunday 26 Jul, 1PM (local time) - 5ft (1.5m), 7s period, W swell with 214 kJ wave energy.
- Next surfable swell (1★+): Sunday 26 Jul, 10PM (local time) - 4.5ft (1.3m), 7s period with W swell.
Best Forecast Surf Conditions for Crab Island this week:
The surf forecast for Crab Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 26) at 10PM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 1.2m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Crab Island in the next 16 days are 1.5m 7s and forecast to arrive on Sunday (Jul 26) at 1PM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 26th Jul) | 4.5ft (1.3m) 7s |
| Best Surf | 10PM (Sun 26th Jul) | 4.5ft (1.3m) 7s |
| Most Powerful | 1PM (Sun 26th Jul) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at what’s cooking for the next couple of weeks here at Crab Island. Let’s be straight with each other—this stretch is a tough one. The forecasts are showing a lot of nothing with a flicker of hope way down the line. Be patient.
Right now, and for the next week and a half, it’s a flat spell. We’re looking at a run from Saturday the 25th of July all the way through to Saturday the 8th of August with hardly a wave worth paddling for. The swell energy is bottomed out, mostly in the single digits or low double digits, with heights barely scraping 2 ft on a good day. The water temp is sitting at a very warm 69°F which is more than 7°F above normal for this time of year—so it’s like bathwater, but there’s simply no punch to it. Winds are mostly cross or cross-onshore, making things messy when there’s even a ripple.
Now, if you’re a die-hard, keep your eyes on Sunday the 9th of August. That morning, the swell finally shows a pulse. Crab Island is an exposed reef break, and it’s catching a 4 ft west swell with a period of 7 seconds. It’s a short-period swell, so it’s not going to have that long, groundswell power, but the energy jumps to 298 (moderate wave energy). The wind is a clean cross-off from the WNW at 16 mph, which is a major positive. This will be the cleanest and most surfable window in the entire 16-day forecast.
Overall, this is a lean run. The consistency is low, and most days are a write-off. But that Sunday morning on the 9th has a chance. It’s not a stand-out classic, but it’s the only real offer on the table. The crowd factor at Crab Island is listed as “sometimes”, so you might have a few others with the same idea, but it won’t be a circus.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Tue morning, min 13°C on Sun night). Winds decreasing (fresh winds from the W on Sun afternoon, light winds from the SW by Mon night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Wed afternoon, min 16°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | ||||||||||||||
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 4 | W 6 | W 7 | W 7 | W 7 | W 6 | WSW 6 | WSW 6 | W 6 | W 5 | WSW 5 | W 11 | W 10 | W 10 | WSW 5 | WSW 6 | WSW 6 | W 6 | W 5 | WSW 5 |
Wave Graph  | ||||||||||||||||||||
 kJ | 24 | 94 | 208 | 211 | 104 | 84 | 68 | 43 | 32 | 13 | 5 | 2 | 2 | 8 | 47 | 95 | 56 | 46 | 15 | 9 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross | cross-on | cross | glassy | cross-on | cross | cross-off | cross-off | cross | off | on | cross | cross-off |
High Tide | 4:18PM7.38m | 4:45AM7.40m | 5:18PM7.78m | 5:41AM7.77m | 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 | |||||||
Low Tide | 10:24PM3.08m | 10:57AM2.97m | 11:22PM2.74m | 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 | |||||||
 |  |  | |  | | |  | | | | | | | |  | | | | | |
 | — | — | 5:28 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — |
 | — | 9:15 | — | — | 9:14 | — | — | 9:12 | — | — | 9:10 | — | — | 9:08 | — | — | 9:07 | — | — | 9:06 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 19 | 19 | 18 | 17 | 18 | 18 | 20 | 23 | 22 | 25 | 26 | 20 | 21 | 20 | 19 | 20 | 22 | 20 |
Feels °C | 14 | 15 | 13 | 13 | 15 | 13 | 15 | 18 | 20 | 22 | 21 | 24 | 23 | 19 | 18 | 17 | 17 | 18 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | — | W 6 | — | — | W 7 | W 6 | — | WSW 6 | W 6 | W 5 | WSW 5 | W 5 | W 10 | W 10 | W 10 | W 9 | WSW 6 | W 6 | W 5 | WSW 5 |
| kJ | — | 94 | — | — | 104 | 84 | — | 43 | 32 | 13 | 5 | 2 | 2 | 8 | 2 | 2 | 56 | 46 | 15 | 9 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 8 | W 8 | W 8 | W 11 | W 8 | W 10 | — | — | — | — | W 7 | W 12 |
| kJ | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 2 | 1 | 2 | — | — | — | — | 8 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 12 | — | W 11 | W 8 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 3 | — | 2 | 1 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 4 | WSW 6 | W 7 | W 7 | — | — | WSW 6 | — | — | — | — | — | WSW 2 | WSW 4 | WSW 5 | WSW 6 | — | — | — | — |
| kJ | 24 | 85 | 208 | 211 | — | — | 68 | — | — | — | — | — | 1 | 8 | 47 | 95 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 414 | 503 | 760 | 361 | 152 | 361 | 308 | 183 | 86 | 158 | 135 | 163 | 320 | 233 | 19 | 360 | 13 | 20 | 190 | 73 |
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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