Surf Forecasts:
Crab Island surf forecast from 15 Jul 2026:
- Most powerful swell: Wednesday 15 Jul, 1PM (local time) - 0.5ft (0.2m), 9s period, WSW swell with 10 kJ wave energy.
Best Forecast Surf Conditions for Crab Island this week:
The most powerful waves expected at Crab Island in the next 16 days are 0.1m 16s and forecast to arrive on Wednesday (Jul 15) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Saturday (Jul 18) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Wed 15th Jul) | 0.5ft (0.2m) 9s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, grab a coffee and listen up. Rusty here, looking over the next few weeks for Crab Island. Gotta be straight with you, it's a tough watch.
For the first ten days, from Wednesday the 15th right through to Saturday the 25th of July, it's flat. I'm talking barely a ripple. Swell heights are stuck below 2ft with almost no energy behind them. The combined energy sits around a measly 1 to 24 — that's wobble, not waves. The water is warm, though, coming in at 69°, which is a full 9° warmer than usual for this time of year. Feels more like a bath than a surf. You’d be better off on a boogie board or just floating.
Now, as we head into the last week of the month, things start to rattle a little. We finally see some life toward the end of July, but it's not clean. On Wednesday the 29th, we get a pulse of 3ft swell from the west with a short period of 6 seconds. The wind is onshore, making it choppy, but the energy is finally building to 69. It's not great, but it's something.
The best of the whole run, if you can call it that, looks like Thursday the 30th of July. The swell bumps up to 4ft from the WSW, still with that short 6-second period. The energy cranks up to 101, which is the only moderate reading we see. But the wind is cross-onshore and bumpy, so it's going to be a messy, close-out beach break. The swell direction is from the west-southwest, and the spot works best on a southwest swell, so it's not a perfect match.
Honestly, this whole period is a write-off for a proper surf. The swell is too small and too short-period for most of it, and when it does finally show up, the wind ruins it. If you're desperate, you might get a few grovelly, blown-out closeouts on the 30th, but don't get your hopes up. For a reef break, this setup is more interesting for a kite surfer than a paddle surfer. The forecast can always change, but for now, I'd hang the board up.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Wed afternoon, min 18°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Sat afternoon, min 14°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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 9 | W 8 | WSW 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | E 3 | W 7 | W 10 | W 9 | W 8 | W 11 | ESE 3 | W 10 | W 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 10 | 10 | 8 | 7 | 6 | 5 | 7 | 7 | 5 | 1 | 1 | 5 | 1 | 2 | 2 | 1 | 2 | 3 | 2 | 2 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross | cross | cross-off | cross-off | cross-on | cross | off | glassy | off | cross-off | cross | cross | off | glassy | cross-off | off | cross-on | cross | cross-off |
High Tide | 8:07PM9.66m | 8:37AM9.47m | 8:55PM9.74m | 9:23AM9.43m | 9:40PM9.63m | 10:05AM9.21m | 10:22PM9.35m | 10:45AM8.86m | 11:01PM8.94m | 11:23AM8.43m | 11:40PM8.45m | 12:03PM7.96m | 00:23AM7.94m | ||||||||
Low Tide | 1:50PM1.13m | 2:24AM0.97m | 2:39PM1.03m | 3:12AM0.94m | 3:24PM1.08m | 3:55AM1.08m | 4:05PM1.29m | 4:34AM1.38m | 4:43PM1.62m | 5:11AM1.78m | 5:21PM2.03m | 5:48AM2.25m | 6:03PM2.48m | ||||||||
 | |  | | | |  | | | | | | | | | | | | | | | |
 | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — |
 | — | — | 9:27 | — | — | 9:25 | — | — | 9:24 | — | — | 9:23 | — | — | 9:22 | — | — | 9:22 | — | — | 9:21 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 28 | 26 | 24 | 28 | 25 | 23 | 25 | 23 | 21 | 23 | 20 | 19 | 22 | 21 | 20 | 23 | 21 | 22 | 25 | 24 |
Feels °C | 22 | 26 | 23 | 23 | 24 | 22 | 21 | 22 | 20 | 19 | 20 | 17 | 16 | 19 | 17 | 19 | 20 | 17 | 20 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 9 | WSW 9 | W 8 | WSW 8 | NW 3 | W 8 | W 8 | W 8 | W 8 | W 8 | NW 4 | W 7 | E 3 | NNW 3 | W 9 | W 8 | NW 4 | W 7 | W 10 | NW 3 |
| kJ | 9 | 8 | 8 | 5 | 7 | 2 | 5 | 5 | 5 | 5 | 1 | 4 | 1 | 1 | 1 | 2 | 1 | 4 | 1 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 6 | W 10 | — | W 8 | SW 6 | SW 6 | SW 6 | S 5 | — | W 8 | NW 4 | W 7 | W 10 | — | — | W 8 | W 10 | W 7 | W 10 |
| kJ | 10 | 10 | 1 | 2 | — | 6 | 1 | 1 | 1 | 1 | — | 1 | 1 | 1 | 2 | — | — | 1 | 2 | 1 | 2 |
Swell 3 Height (m) Direction Period (s) | S 7 | SW 7 | SW 16 | SW 14 | SW 7 | SW 7 | — | SW 13 | SW 13 | — | — | — | — | — | W 7 | — | — | W 11 | W 8 | — | W 7 |
| kJ | 1 | 2 | 10 | 8 | 2 | 2 | — | 7 | 7 | — | — | — | — | — | 1 | — | — | 2 | 1 | — | 1 |
Wind waves Height (m) Direction Period (s) | E 3 | E 3 | E 3 | — | — | — | — | — | NW 4 | — | — | NE 2 | E 3 | ENE 3 | — | — | NW 3 | — | ESE 3 | ENE 2 | — |
| kJ | 4 | 2 | 4 | — | — | — | — | — | 3 | — | — | 1 | 5 | 2 | — | — | 2 | — | 3 | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 202 | 202 | 319 | 199 | 222 | 86 | 135 | 1700 | 395 | 420 | 420 | 94 | 141 | 202 | 348 | 348 | 414 | 51 | 135 | 153 | 190 |
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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