
Surf Forecasts:
Crab Island surf forecast from 10 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 13 Aug, 7PM (local time) - 3.5ft (1.0m), 10s period, WSW swell with 209 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 10PM (local time) - 2.5ft (0.7m), 9s period with WSW 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 Wednesday (Aug 12) at 10PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.2m and 3s. 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 1.0m 10s and forecast to arrive on Thursday (Aug 13) 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 0.4m 3s period and expected on Friday (Aug 14) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 10PM (Wed 12th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 7PM (Thu 13th Aug) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
G’day, it’s Rusty here. Let’s be straight with you: the next couple of weeks are looking pretty grim for a paddle. We’ve got a long stretch of tiny, weak surf and a lot of choppy, cross-shore wind that’s going to have you pulling the plug on the session before you even get your wetsuit on. I’m talking about Crab Island, a reef setup that stays pretty consistent, but it’s not going to do you any favors with what’s coming through.
The water is sitting at 69° right now, which is a solid 7° warmer than normal for this time of year. That’s a big deal – we’re talking about a seriously warm ocean, so you can ditch the thick rubber and enjoy the feeling of being in a bath.
Looking at the pattern, the first real chance of anything worthwhile is a long way off. From now until the 22nd, it’s basically a write-off. The swell is tiny, mostly under 2ft, and the energy is weak – we're talking combined energy values in the single digits to the 70s, which is just nothing. The wind is mostly onshore or cross-shore, making things messy. There are a couple of clean moments, like the glassy spells on the morning of the 16th and the 21st, but with no swell behind them, it’s just a flat, pretty ocean.
Now, keep your eyes on Sunday the 23rd. That’s the one that’s got my attention. The morning shows a jump to 7ft of swell from the W, with a period of 9 seconds. The combined energy leaps to 621, which is strong. The wind is light and offshore from the NW, making it clean. This is the standout of the whole window. It’s a groundswell, but at 9 seconds it’s not super long, so it should hold some shape. This is going to be big – over 5ft, so it’s not for the beginners. It's a proper wave for the crew who know what they’re doing. The afternoon sees it drop a bit to 5ft and the wind swings cross-shore, so the morning is definitely the call. This is more than a week out, so treat it as a promising lead, not a guarantee, but it’s the only real highlight on the board.
After that, it fades out again quickly, with the rest of the window looking pretty average. The swell drops back to under 3ft, and we’re back to ordinary conditions. There’s a weak, very long-period swell on the 25th, but it’s tiny and blown out, so it’s not worth the effort. Honestly, if you’ve got a window, you’re waiting for the 23rd. Everything else is a skunk.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Wed afternoon, min 15°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 14°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 6 | WSW 5 | SW 7 | W 8 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | W 9 | W 6 | W 8 | W 8 | WSW 7 | W 8 | WSW 7 | WSW 7 | WSW 7 |
Wave Graph | |||||||||||||||||||||
33 | 9 | 7 | 5 | 7 | 25 | 58 | 74 | 94 | 158 | 173 | 123 | 40 | 44 | 64 | 57 | 30 | 29 | 18 | 10 | 5 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-off | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross-off | cross-off | off | off | cross-off | off | glassy | cross | cross-off |
High Tide | 5:13PM8.36m | 5:50AM8.55m | 6:15PM9.02m | 6:47AM9.10m | 7:08PM9.53m | 7:37AM9.48m | 7:55PM9.82m | 8:21AM9.64m | 8:38PM9.89m | 9:01AM9.60m | 9:16PM9.76m | 9:37AM9.39m | 9:51PM9.46m | ||||||||
Low Tide | 10:52AM2.46m | 11:32PM2.07m | 11:58AM1.85m | 00:33AM1.47m | 12:53PM1.33m | 1:26AM1.04m | 1:41PM1.00m | 2:12AM0.82m | 2:23PM0.87m | 2:52AM0.81m | 3:01PM0.92m | 3:27AM0.99m | 3:34PM1.13m | 3:57AM1.32m | |||||||
5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | |
— | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 21 | 19 | 23 | 26 | 23 | 27 | 31 | 27 | 26 | 26 | 19 | 20 | 22 | 16 | 20 | 21 | 15 | 18 | 20 | 18 |
Feels °C | 18 | 18 | 17 | 21 | 23 | 21 | 23 | 28 | 26 | 22 | 23 | 19 | 17 | 18 | 12 | 17 | 16 | 11 | 16 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 6 | WSW 5 | SW 7 | SW 6 | W 10 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 10 | W 10 | WSW 10 | W 6 | W 9 | W 8 | W 8 | WSW 7 | W 8 | WSW 7 | WSW 7 | WSW 7 |
33 | 9 | 7 | 2 | 7 | 25 | 58 | 74 | 94 | 158 | 127 | 123 | 34 | 39 | 64 | 57 | 30 | 29 | 18 | 10 | 5 | |
Swell 2 Height (m) Direction Period (s) | W 9 | SW 6 | W 5 | W 8 | SW 6 | W 9 | SW 6 | — | — | — | — | — | W 9 | — | — | WSW 8 | — | WSW 8 | — | — | W 5 |
1 | 6 | 2 | 5 | 2 | 2 | 1 | — | — | — | — | — | 40 | — | — | 21 | — | 19 | — | — | 2 | |
Swell 3 Height (m) Direction Period (s) | — | W 8 | W 8 | W 10 | W 13 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 1 | 1 | 2 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | SE 3 | ESE 2 | — | — | ESE 2 | — | — | WSW 10 | WSW 4 | — | W 6 | — | NNW 3 | WNW 6 | NNW 3 | — | — | — |
— | — | — | 2 | 1 | — | — | 1 | — | — | 173 | 5 | — | 44 | — | 1 | 22 | 2 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 189 | 190 | 135 | 369 | 396 | 20 | 25 | 14 | 2 | 19 | 361 | 1 | 0 | 319 | 0 | 0 | 412 | 13 | 190 | 367 | 351 |
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.











