Surf Forecasts:
Crab Island surf forecast from 22 Aug 2026:
- Best quality surf: Friday 28 Aug, 1AM (local time) - 3.5ft (1.1m), 7s period, SW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 7PM (local time) - 8ft (2.5m), 8s period, W swell with 847 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 1AM (local time) - 3.5ft (1.1m), 7s period with SW 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 Friday (Aug 28) at 1AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.1m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Crab Island in the next 16 days are 2.5m 8s and forecast to arrive on Friday (Aug 28) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Saturday (Aug 22) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 28th Aug) | 3.5ft (1.1m) 7s |
| Best Surf | 1AM (Fri 28th Aug) | 3.5ft (1.1m) 7s |
| Most Powerful | 7PM (Fri 28th Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, Rusty here, let's take a look at what's on offer for the next stretch.
First up, the water temperature at Crab Island (reef) is a toasty 69.9°F which is a staggering 8.6°F warmer than usual for this time of year. That is very unusual, mate – like swimming in a bath compared to what we'd normally expect.
Truth be told, this whole 16-day window looks pretty grim. We're staring at a long, quiet run. There's no real surf on the table to get excited about. From now through to the end of the month, it's a wasteland of tiny, weak slop. You've got a few days where the swell tries to kick, but the wind and quality just aren't there.
The only time the ocean shows a bit of life is around the afternoon of Friday, August 28th. The swell bumps up to 7.9ft from the WSW with a period of only 7 seconds. That's a lot of messy, short-period energy with wave energy at 607 (moderate to strong). Combined with a moderate cross-shore breeze and a marginal tide call, it's going to be a lumpy, bumpy mess. At that size, this is really only for the experts, and honestly, it looks more like a day for the kite surfers than the paddle crew.
Then it all fades again. The morning of Monday, August 31st gives us a small window with a cleaner 2.9ft wave from the W (8-second period) and a light cross-offshore breeze. The energy is weak at 105, and it's "surfable but very ordinary." That's about the best we get, and that's not saying much.
The rest of the run into the first week of September is all tiny surf, onshore winds, and generally poor conditions. There is nothing here that stands out as a good bet. It’s a poor run, but the forecasts can always change, so keep an eye on it.
Short Range ForecastMostly dry. Warm (max 24°C on Mon afternoon, min 13°C on Sat night). Winds increasing (calm on Sun afternoon, fresh winds from the E by Mon morning). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Wed night. Warm (max 24°C on Tue afternoon, min 16°C on Tue night). Winds decreasing (fresh winds from the E on Tue morning, calm by Thu night). | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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 10 | WSW 10 | WSW 9 | W 9 | WSW 9 | WSW 10 | WSW 9 | E 4 | E 4 | E 4 | E 4 | W 10 | W 9 | W 8 | W 8 | SW 8 | SW 6 | SW 7 | WSW 7 | WSW 7 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 18 | 18 | 16 | 8 | 7 | 19 | 8 | 9 | 24 | 13 | 14 | 7 | 14 | 12 | 10 | 95 | 129 | 119 | 404 | 607 | 676 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | cross | glassy | cross-off | cross | cross | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-off | on | cross-on | glassy | cross-on | cross | cross-off |
High Tide | 2:19PM6.75m | 2:58AM6.69m | 3:48PM7.01m | 4:21AM7.06m | 4:55PM7.57m | 5:22AM7.63m | 5:45PM8.16m | 6:07AM8.18m | 6:26PM8.66m | 6:45AM8.62m | 7:02PM9.05m | 7:20AM8.96m | 7:36PM9.33m | ||||||||
Low Tide | 8:36PM3.79m | 9:21AM3.79m | 10:00PM3.49m | 10:37AM3.32m | 11:04PM2.94m | 11:31AM2.75m | 11:52PM2.38m | 12:13PM2.23m | 00:32AM1.92m | 12:49PM1.83m | 1:08AM1.55m | 1:22PM1.53m | 1:41AM1.29m | ||||||||
 | |  | | |  |  |  | | | | | | |  |  | | |  | | | |
 | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — |
 | — | 8:24 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | 2 | — | — | 1 | — | — |
Temp °C | 16 | 18 | 15 | 18 | 22 | 19 | 20 | 24 | 20 | 21 | 24 | 20 | 20 | 23 | 20 | 19 | 21 | 18 | 18 | 18 | 17 |
Feels °C | 14 | 15 | 11 | 16 | 20 | 17 | 14 | 19 | 13 | 15 | 21 | 18 | 20 | 23 | 20 | 17 | 18 | 17 | 17 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | WSW 9 | W 9 | WSW 9 | WSW 10 | WSW 9 | W 9 | W 9 | W 8 | SW 8 | SW 8 | SW 4 | W 8 | W 8 | SW 8 | WSW 9 | SW 7 | — | — | — |
| kJ | 18 | 18 | 16 | 6 | 7 | 19 | 8 | 2 | 2 | 1 | 3 | 3 | 2 | 12 | 10 | 95 | 8 | 119 | — | — | — |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | W 10 | SW 9 | SW 13 | SW 9 | W 8 | W 10 | W 9 | WSW 4 | — | W 7 | W 12 | W 13 | — | — | — |
| kJ | 9 | 8 | 8 | 8 | 7 | 8 | 2 | 3 | 7 | 3 | 1 | 7 | 14 | 1 | — | 4 | 3 | 3 | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 15 | — | — | SW 15 | — | W 14 | SW 14 | SW 14 | SW 9 | SW 13 | W 10 | W 8 | SW 8 | SW 7 | SW 7 | — | W 12 | — | — | — | — |
| kJ | 9 | — | — | 8 | — | 4 | 8 | 7 | 3 | 7 | 2 | 1 | 2 | 2 | 2 | — | 3 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NNW 3 | — | — | — | E 3 | E 4 | E 4 | E 4 | E 4 | SSE 3 | — | SSW 4 | — | — | SW 6 | — | WSW 7 | WSW 7 | WSW 9 |
| kJ | — | — | 1 | — | — | — | 7 | 9 | 24 | 13 | 14 | 1 | — | 2 | — | — | 129 | — | 404 | 607 | 676 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 199 | 20 | 135 | 127 | 73 | 394 | 308 | 307 | 385 | 149 | 86 | 136 | 86 | 86 | 125 | 251 | 0 | 112 | 50 | 319 |
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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