Surf Forecasts:
Crab Island surf forecast from 2 Aug 2026:
- Best quality surf: Thursday 6 Aug, 4AM (local time) - 4.5ft (1.3m), 6s period, W swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 4PM (local time) - 5ft (1.5m), 7s period, WSW swell with 200 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 4AM (local time) - 4.5ft (1.3m), 6s 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 Thursday (Aug 06) at 4AM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 0.1m and 11s. Another secondary swell of 0.1m and 13s is also forecast. 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 Wednesday (Aug 05) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 6th Aug) | 4.5ft (1.3m) 6s |
| Best Surf | 4AM (Thu 6th Aug) | 4.5ft (1.3m) 6s |
| Most Powerful | 4PM (Wed 5th Aug) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Rusty here. I've taken a long hard look at the entire 16-day window for Crab Island, and I've got to be straight with you: it's a tough run. The forecast is showing nothing but "poor surf conditions" across the entire period, with scores of zero across the board, so there's nothing to get excited about at all.
The first day with any real swell energy bumps into the moderate range on Wednesday, August 5th, with the combined swell energy hitting 125 (moderate) in the morning and 200 (moderate) in the afternoon. That afternoon sees a 5 ft swell from the WSW, but the period is a short 7 seconds, and the wind is a fresh 19 mph cross-shore, creating lumpy, choppy conditions. It's just not surfable. The water temperature is about average for this time of year, so no surprises there.
We see a similar pattern on Thursday, August 6th, with a morning clean-up from a WNW cross-offshore wind at 16 mph, and a 3.6 ft swell from the W, but the period is a gutless 6 seconds. The energy is 105 (moderate), but the wave quality is still poor. Honestly, the best-looking setups for wind here are actually more interesting for kite surfing than paddle surfing, especially on the afternoons with that fresh cross-shore wind.
The rest of the two weeks is a ghost town of tiny, weak, and mostly messy swell. From the 7th of August onward, the energy drops into the teens and low double digits, with heights barely cracking 1.6 ft. We get a few glassy mornings, like Friday the 7th, Saturday the 8th, and Sunday the 9th, but the swell is so small (0.7 ft to 2 ft) and short-period that it's not worth paddling out for. There's a long gap of consistent flatness from the 8th through to the 17th, with no real hope of a rideable wave.
This kind of blank run, while frustrating, is not unusual for the area. The swell windows are just not lining up, and the wind is working against us every time there's a pulse. Forecasts can change, but right now, you're better off saving the wax and waiting for the next system.
Short Range ForecastSome drizzle, heaviest during Tue morning. Warm (max 24°C on Sun afternoon, min 14°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Fri afternoon, min 13°C on Wed night). Winds decreasing (fresh winds from the WSW on Wed afternoon, calm by Thu night). | ||||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | |||||||||||||||
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 9 | WSW 9 | WSW 8 | WSW 8 | WSW 7 | SW 6 | WSW 7 | WSW 7 | WSW 6 | W 6 | W 6 | W 5 | WSW 5 | W 5 | W 9 | W 9 | W 4 | W 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 13 | 13 | 35 | 84 | 65 | 45 | 98 | 96 | 109 | 125 | 200 | 127 | 100 | 91 | 20 | 8 | 17 | 6 | 6 | 9 | 4 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross | cross-on | cross | glassy | cross-on | cross-on | cross-on | cross-off | cross | cross-off | cross-off | cross | off | glassy | cross | off | glassy | cross | cross-off |
High Tide | 9:22AM8.97m | 9:40PM9.18m | 9:54AM8.86m | 10:13PM9.00m | 10:28AM8.65m | 10:49PM8.70m | 11:05AM8.34m | 11:30PM8.31m | 11:51AM7.95m | 00:25AM7.86m | 12:55PM7.55m | 1:42AM7.49m | 2:26PM7.40m | 3:17AM7.49m | |||||||
Low Tide | 3:18PM1.51m | 3:41AM1.44m | 3:50PM1.63m | 4:14AM1.63m | 4:23PM1.85m | 4:49AM1.92m | 5:02PM2.18m | 5:31AM2.32m | 5:52PM2.60m | 6:29AM2.77m | 7:06PM3.01m | 7:54AM3.09m | 8:47PM3.09m | ||||||||
 | |  | | | |  |  | | | |  | | | | | | |  | | | |
 | 5:39 | — | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — |
 | — | — | 9:02 | — | — | 9:00 | — | — | 9:00 | — | 8:58 | — | — | 8:55 | — | — | 8:53 | — | — | 8:52 | — |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 24 | 20 | 22 | 23 | 19 | 20 | 19 | 18 | 17 | 17 | 17 | 16 | 17 | 16 | 18 | 20 | 16 | 18 | 19 | 17 |
Feels °C | 15 | 22 | 17 | 19 | 19 | 17 | 19 | 16 | 17 | 12 | 11 | 14 | 10 | 11 | 13 | 14 | 14 | 12 | 16 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | WSW 8 | WSW 10 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | — | WSW 6 | — | — | W 11 | W 10 | — | W 5 | WSW 5 | W 9 | W 4 | W 4 | W 9 | W 4 |
| kJ | 13 | 13 | 35 | 84 | 65 | 45 | 98 | — | 64 | — | — | 2 | 2 | — | 20 | 8 | 7 | 6 | 3 | 6 | 4 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 13 | W 13 | — | W 10 | W 9 | — | W 9 | W 9 | — | W 9 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 3 | 3 | — | 7 | 7 | — | 6 | 6 | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | W 11 | — | — | — | — | — | — | — | — | — | — | — | — | SW 12 | W 12 | — | W 12 | — | — | — |
| kJ | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 3 | — | 3 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | WSW 7 | SW 6 | WSW 7 | WSW 7 | WSW 6 | W 6 | W 6 | — | — | W 5 | — | — | W 4 | — |
| kJ | — | — | — | — | — | — | — | 96 | 109 | 125 | 200 | 127 | 100 | 91 | — | — | 17 | — | — | 9 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 414 | 190 | 15 | 21 | 20 | 20 | 351 | 252 | 361 | 49 | 361 | 219 | 190 | 206 | 190 | 367 | 444 | 364 | 364 | 395 | 190 |
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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