
Surf Forecasts:
Crab Island surf forecast from 30 Jul 2026:
- Best quality surf: Monday 3 Aug, 1PM (local time) - 2.5ft (0.7m), 9s period, WSW swell with glassy winds.
- Most powerful swell: Monday 3 Aug, 7AM (local time) - 2.5ft (0.7m), 9s period, WSW swell with 70 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 1PM (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 Monday (Aug 03) at 1PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.3m 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 0.7m 9s and forecast to arrive on Monday (Aug 03) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 04) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Mon 3rd Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 1PM (Mon 3rd Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 7AM (Mon 3rd Aug) | 2.5ft (0.7m) 9s |
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 – this is a tough outlook for Crab Island. Over the next two weeks, we're looking at a real dry spell. The surf is going to be small and the conditions are more about flat spells than anything worth paddling out for. It's a blank run, and for this area, that's not unusual when the swell windows don't line up. But don't lose hope, forecasts can change, and it rarely stays this poor for long.
We start off Thursday the 30th of July with nothing to write home about. A tiny 2 ft swell from the west, with a short period of 5 seconds, meaning weak, gutless waves. The combined energy is a measly 27 (weak energy), and the wind is cross-off from the north-west at 9 mph, which is actually clean, but the swell is too small to do anything with. It's poor surf conditions, plain and simple.
Friday the 31st of July is even worse. The swell drops to 0.3 ft in the morning, with a long period of 9 seconds, but there's no energy behind it. The combined energy is just 3 (weak energy). The wind stays cross-off and clean, but you'd be chasing whitewash.
Saturday the 1st of August sees a similar story: 2 ft of west swell, 5-second period, combined energy of 40 (weak energy). The cross-off wind in the morning keeps it clean, but the waves are tiny and weak. Sunday the 2nd of August offers a brief moment of calm with a glassy morning and 1 ft of swell from the west-southwest, but the combined energy is only 15 (weak energy). It's a pretty scene, but not a surfing one.
The following week, from Monday the 3rd of August through to Monday the 10th of August, is more of the same. The swell height maxes out at 2 ft on Monday the 3rd, with a combined energy of 71 (weak energy), but the wind is cross-shore and the wave quality is poor. The water temperature is about average for this time of year, so no thermals needed.
The second week, from Tuesday the 11th of August onwards, sees the swell bottom out. We're looking at 0.3 ft to 0.7 ft of swell for most of the week, with combined energy values in the single digits. There are a couple of glassy moments on Wednesday the 12th and Thursday the 13th of August, with 2 ft and 1 ft of swell respectively, but the energy is still weak (20 and 9). Nothing here is going to get you excited.
Honestly, there's no standout. There's no one or two days to highlight. The best you could hope for is a session on the 2 ft days with glassy conditions, but even then, it's a marginal surf. It's a real bummer, but that's the way it goes sometimes.
Stay patient.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Thu afternoon, min 13°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Mon afternoon, min 14°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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) | W 5 | W 5 | W 4 | W 9 | W 5 | W 4 | W 5 | W 5 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | SW 8 | WSW 8 | SW 7 | SW 7 | SW 7 | SW 7 | E 3 |
Wave Graph | |||||||||||||||||||||
19 | 12 | 6 | 2 | 37 | 8 | 21 | 17 | 24 | 22 | 13 | 49 | 70 | 62 | 32 | 22 | 14 | 12 | 8 | 11 | 11 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | off | cross-off | cross | cross-off | cross-off | cross | off | cross | glassy | off | cross | cross | cross-off | cross-on | cross | cross | cross-on | cross | cross-off |
High Tide | 7:42AM8.66m | 7:59PM9.04m | 8:16AM8.84m | 8:33PM9.18m | 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 | |||||||
Low Tide | 1:43PM1.77m | 2:03AM1.57m | 2:15PM1.60m | 2:37AM1.43m | 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 | ||||||||
5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | |
— | — | 9:07 | — | — | 9:06 | — | — | 9:05 | — | — | 9:02 | — | — | 9:00 | — | — | 9:00 | — | 8:58 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 19 | 17 | 17 | 17 | 16 | 17 | 17 | 16 | 19 | 22 | 21 | 21 | 25 | 22 | 20 | 20 | 18 | 17 | 18 | 16 |
Feels °C | 16 | 14 | 14 | 12 | 11 | 13 | 13 | 12 | 13 | 16 | 20 | 18 | 21 | 21 | 18 | 18 | 19 | 17 | 16 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | W 5 | W 10 | W 4 | W 9 | W 12 | W 11 | W 5 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | SW 8 | WSW 8 | SW 7 | SW 7 | SW 7 | SW 7 | WSW 6 |
19 | 2 | 6 | 2 | 3 | 2 | 21 | 16 | 24 | 22 | 13 | 49 | 70 | 62 | 32 | 22 | 14 | 12 | 7 | 7 | 4 | |
Swell 2 Height (m) Direction Period (s) | W 10 | W 7 | W 9 | W 8 | W 9 | W 9 | WSW 10 | — | W 4 | — | W 11 | — | — | — | — | W 9 | — | W 9 | W 10 | W 10 | W 11 |
7 | 1 | 2 | 1 | 2 | 2 | 19 | — | 3 | — | 2 | — | — | — | — | 2 | — | 2 | 2 | 2 | 2 | |
Swell 3 Height (m) Direction Period (s) | W 8 | — | W 7 | — | — | W 9 | — | — | — | — | — | — | — | — | — | — | — | W 11 | — | W 13 | W 13 |
1 | — | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | 2 | — | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | W 5 | W 5 | NNW 3 | W 5 | W 5 | W 4 | — | W 5 | — | — | — | — | E 2 | ESE 2 | E 4 | E 3 | — | E 3 | E 3 | E 3 | E 3 |
20 | 12 | 1 | 12 | 37 | 8 | — | 17 | — | — | — | — | 1 | 1 | 12 | 1 | — | 8 | 8 | 11 | 11 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 361 | 398 | 360 | 190 | 206 | 206 | 424 | 206 | 190 | 202 | 73 | 15 | 14 | 175 | 15 | 224 | 279 | 402 | 421 | 368 | 178 |
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.










