Surf Forecasts:
Crab Island surf forecast from 1 Aug 2026:
- Best quality surf: Monday 3 Aug, 10PM (local time) - 2.5ft (0.7m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 10PM (local time) - 4.5ft (1.3m), 7s period, WSW swell with 164 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 10PM (local time) - 2.5ft (0.7m), 8s 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 Monday (Aug 03) at 10PM. The primary swell is predicted to be 0.7m and 8s period. 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 1.3m 7s and forecast to arrive on Wednesday (Aug 05) at 10PM. 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 4s period and expected on Saturday (Aug 01) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Mon 3rd Aug) | 2.5ft (0.7m) 8s |
| Best Surf | 10PM (Mon 3rd Aug) | 2.5ft (0.7m) 8s |
| Most Powerful | 10PM (Wed 5th Aug) | 4.5ft (1.3m) 7s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s cut to the chase – it’s a lean run for the next fortnight. Crab Island is the only break showing, and it’s a tough watch. For a reef that’s fairly consistent, the ocean is just not playing ball.
The pattern is flat and weak, with a long stretch of nothing. The first real chance to even think about it comes on Thursday, August 6th. Before that, from the 1st through the 5th, it’s terrible. Tiny swell, never above 3ft, with short periods and messy winds. The energy is basically non-existent, with values like 31 and 27 (weak). It’s just choppy, onshore junk.
Thursday the 6th morning is the only highlight. We get a 4ft swell from the WSW, with a weak 7-second period, and the combined energy hits a moderate 102. The wind switch is key – a light cross-offshore breeze from the NW will clean it right up. It’s surfable, but pretty ordinary. The water temp is about average for the season.
From there, it’s back to the doldrums. Friday the 7th flattens out, and while we get some glassy calm on the 8th and 9th, the swell is only 1ft to 2ft – barely a bump. There’s a little pulse on the 11th and 12th, with swell hitting 4ft and energy jumping to 220 and 206 (moderate), but the winds are all cross-shore with a chop, so the quality is poor. On a reef, that’s just a messy, frustrating session.
Bottom line: Thursday the 6th morning is your only real shot at a clean wave. The rest is a write-off. Most days, with the onshore winds and weak swell, it’s looking better for kiting than surfing. Don’t force it.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sun afternoon, min 13°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Tue morning, min 13°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | SW 6 | SW 6 | SW 7 | WSW 7 | WSW 7 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 19 | 16 | 24 | 13 | 13 | 52 | 86 | 62 | 45 | 23 | 72 | 91 | 97 | 135 | 142 | 99 | 59 | 21 | 7 | 3 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | off | cross-on | glassy | cross-off | cross-on | cross | cross-off | on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross | off | cross-on | off | off |
High Tide | 8:49AM8.96m | 9:07PM9.24m | 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 | |||||||
Low Tide | 2:47PM1.51m | 3:09AM1.37m | 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 | ||||||||
 |  |  | | | | | | |  | | | | |  | | | | | | | |
 | 5:37 | — | — | 5:39 | — | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:46 | — | — | 5:47 | — | — |
 | — | — | 9:05 | — | — | 9:02 | — | — | 9:00 | — | — | 9:00 | — | 8:58 | — | — | 8:55 | — | — | 8:53 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 16 | 19 | 23 | 21 | 22 | 22 | 19 | 20 | 20 | 19 | 20 | 19 | 17 | 17 | 17 | 17 | 16 | 19 | 18 |
Feels °C | 14 | 12 | 14 | 16 | 19 | 18 | 19 | 18 | 17 | 19 | 18 | 16 | 16 | 16 | 14 | 14 | 13 | 14 | 15 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | W 5 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 10 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | — | WSW 6 | — | — | W 13 | WSW 7 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 7 |
| kJ | 12 | 16 | 24 | 13 | 13 | 52 | 86 | 62 | 45 | 23 | — | 57 | — | — | 3 | 99 | 59 | 21 | 7 | 3 | 5 |
Swell 2 Height (m) Direction Period (s) | WSW 10 | — | W 4 | — | W 11 | NNW 3 | — | — | — | W 9 | — | — | — | — | — | W 13 | W 10 | W 10 | W 9 | W 9 | SW 5 |
| kJ | 19 | — | 3 | — | 2 | 1 | — | — | — | 7 | — | — | — | — | — | 3 | 2 | 7 | 2 | 2 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 12 | SW 12 | W 12 | — | SW 12 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 6 | 3 | — | 5 |
Wind waves Height (m) Direction Period (s) | — | W 5 | — | — | — | — | — | — | — | — | WSW 8 | SW 6 | SW 6 | SW 7 | WSW 7 | — | — | — | — | ESE 2 | — |
| kJ | — | 11 | — | — | — | — | — | — | — | — | 72 | 91 | 97 | 135 | 142 | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 191 | 206 | 202 | 202 | 190 | 15 | 19 | 20 | 19 | 183 | 320 | 320 | 144 | 144 | 0 | 0 | 176 | 190 | 402 | 400 | 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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