Surf Forecasts:
Crab Island surf forecast from 23 Aug 2026:
- Best quality surf: Thursday 27 Aug, 10PM (local time) - 3.5ft (1.0m), 8s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 29 Aug, 7AM (local time) - 5ft (1.6m), 7s period, W swell with 285 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 10PM (local time) - 3.5ft (1.0m), 8s 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 Thursday (Aug 27) at 10PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.1m and 11s. 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 1.6m 7s and forecast to arrive on Saturday (Aug 29) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Sunday (Aug 30) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 27th Aug) | 3.5ft (1.0m) 8s |
| Best Surf | 10PM (Thu 27th Aug) | 3.5ft (1.0m) 8s |
| Most Powerful | 7AM (Sat 29th Aug) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, Rusty here again, but this time in feet and miles. So, Crab Island for the next 16 days—we’re looking at pretty much nothing rideable. From Sunday the 23rd all the way to Monday the 7th of September, it’s mostly poor surf.
Water temp is about 69°F right now, and that’s about 8°F warmer than normal for this time of year, so definitely noticeable when you jump in.
First few mornings, swell is ankle-deep—maybe 0.3ft to 0.7ft from the SW, with short periods. Not worth paddling out. The wind gets going through the week and we get a bump around the 29th. On Saturday the 29th morning, we see a 7ft W swell with a 7-second period, energy reading 435 (moderate). But the wind is a fresh cross-shore at 22 mph, so it’s going to be lumpy and choppy. That afternoon, it’ll be about 7ft with energy at 504 (still moderate), but same messy wind. Anything over 5ft is not beginner territory, and the cross-shore chop makes it a fight out there. For the reef setup, you might get a few corners, but you’ll earn them.
After the 29th, it’s back to small, weak surf with cross-onshore junk. There’s a couple of glassy moments—like Sunday the 23rd and even Monday the 31st with clean offshore wind—but the swell is barely a ripple. No power behind it.
No real standout session in this whole 16-day run. The 29th is the biggest but wind wrecked it. Honestly, this would be better for kiteboarding than paddling. I’d say sit this one out.
That’s your lot.
Rusty
Short Range ForecastMostly dry. Warm (max 24°C on Mon afternoon, min 14°C on Sun night). Winds increasing (calm on Sun afternoon, fresh winds from the E by Mon night). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Wed night. Warm (max 23°C on Wed afternoon, min 14°C on Fri night). Mainly fresh winds. | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 9 | WSW 10 | WSW 9 | E 4 | E 4 | E 4 | E 3 | W 10 | W 9 | W 8 | W 8 | SSW 6 | SW 8 | WSW 9 | WSW 7 | WSW 7 | WSW 7 | W 7 | WSW 7 | WSW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 7 | 20 | 8 | 9 | 17 | 13 | 6 | 8 | 14 | 12 | 10 | 16 | 132 | 129 | 70 | 84 | 108 | 251 | 186 | 96 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | off | cross | cross | cross-off | cross-off | cross | cross-on |
High Tide | 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 | 7:53AM9.20m | 8:09PM9.52m | ||||||||
Low Tide | 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 | 1:53PM1.31m | 2:12AM1.13m | |||||||
 |  |  | |  |  | | | | |  | | | | | | | | | | |
 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — |
 | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | 7 | — | — | — | — | — | 2 | — | — | 1 |
Temp °C | 21 | 19 | 21 | 24 | 20 | 23 | 23 | 20 | 19 | 23 | 20 | 19 | 19 | 17 | 18 | 18 | 17 | 18 | 18 | 17 |
Feels °C | 18 | 16 | 15 | 18 | 14 | 19 | 23 | 18 | 19 | 21 | 19 | 19 | 18 | 16 | 16 | 13 | 13 | 13 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 10 | WSW 9 | W 9 | W 9 | W 8 | W 8 | W 10 | W 9 | W 8 | W 8 | W 7 | SW 8 | WSW 9 | WSW 7 | WSW 7 | WSW 7 | — | — | W 7 |
| kJ | 7 | 20 | 8 | 2 | 6 | 1 | 1 | 8 | 14 | 12 | 10 | 4 | 132 | 129 | 70 | 84 | 108 | — | — | 74 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 14 | W 10 | SW 9 | SW 13 | SW 13 | SW 8 | SW 8 | SW 8 | SW 4 | WSW 4 | WSW 9 | W 7 | W 11 | W 8 | W 8 | — | — | — | — |
| kJ | 7 | 8 | 2 | 3 | 7 | 7 | 3 | 3 | 2 | 2 | 2 | 8 | 4 | 2 | 5 | 12 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 14 | SW 14 | S 9 | SW 9 | W 10 | W 13 | W 13 | SW 7 | SW 7 | SW 9 | W 12 | — | — | — | — | — | — | — |
| kJ | — | — | 8 | 8 | 1 | 3 | 2 | 3 | 3 | 2 | 2 | 3 | 3 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | E 3 | E 4 | E 4 | E 4 | E 3 | — | S 3 | — | SE 3 | SSW 6 | — | — | — | — | — | W 7 | WSW 7 | WSW 7 |
| kJ | — | — | 4 | 9 | 17 | 13 | 6 | — | 1 | — | 2 | 16 | — | — | — | — | — | 251 | 186 | 96 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 127 | 73 | 395 | 320 | 289 | 135 | 320 | 20 | 20 | 86 | 319 | 21 | 1 | 0 | 138 | 139 | 10 | 319 | 308 | 102 |
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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