Surf Forecasts:
Crab Island surf forecast from 10 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 10PM (local time) - 3.5ft (1.0m), 10s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 1AM (local time) - 4ft (1.2m), 10s period, WSW swell with 324 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 10PM (local time) - 3.5ft (1.0m), 10s 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 Tuesday (Aug 11) at 10PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.1m and 7s. 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 1.2m 10s and forecast to arrive on Thursday (Aug 13) at 1AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Tuesday (Aug 11) at 10AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 11th Aug) | 3.5ft (1.0m) 10s |
| Best Surf | 10PM (Tue 11th Aug) | 3.5ft (1.0m) 10s |
| Most Powerful | 1AM (Thu 13th Aug) | 4ft (1.2m) 10s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s have a yarn about the next few weeks at Crab Island. Gotta be straight with you – the 16-day window starts off pretty ordinary. There’s a big gap right at the beginning with no real surf to get excited about.
For the first week and a bit, it’s a tough run. From Monday the 10th of August right through to the morning of Wednesday the 19th, it’s mostly small, weak, and messy. The odd session might be surfable but nothing you’d drive for. Winds are often cross-on or just wrong, and most of the time the scores tell the story: poor conditions. The swell energy is low, often below 100 (82, 58, 33, 98) – just not enough push. The one bright spark in that stretch is the Wednesday the 19th morning: clean conditions with a light cross-off breeze from the NE, and about 3ft of west swell, but still nothing special.
Now, the real standout doesn’t arrive until a week later. You gotta be patient. Look to the morning of Friday the 21st of August. That’s your best bet for the whole run. We’ve got a clean 3ft swell coming from the WNW, period of 10 seconds – that’s a decent groundswell, good energy and shape for a reef like this. The wind is light offshore from the NE, so you’ll be looking at glassy faces. Combined swell energy jumps up to a healthy 212 (moderate energy), and the optimum direction is west, so the WNW angle is dialled in nicely. This is an advanced wave, fairly consistent, but crowds can be a thing here. Still, for one morning only, it’s worth it.
Before that, the morning of Thursday the 20th of August has a bit more size – 5ft to 5ft from the WNW – but the wind is a fresh 19 mph northerly. The energy is higher (372 and 368) but with that much wind, it’s messy and only for experts. The water temp sits around 62°F, about 2°F warmer than usual – a touch warmer than normal, nothing crazy.
By the second week, from Saturday the 22nd onward, it’s back to small, choppy, and cross-on. The end of the run is pretty cooked, with strong winds and lumpy conditions. Not a lot to chase there.
So, if you’re keen, pencil in the Friday 21st morning and maybe keep an eye on the Thursday morning before if you’re a confident surfer. Otherwise, it’s a lean stretch.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Tue afternoon, min 13°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 21°C on Thu morning, min 13°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) | W 8 | W 8 | W 7 | W 7 | W 11 | WSW 10 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | W 9 | W 8 | W 8 | W 8 | W 8 | W 8 | WNW 7 | W 7 | NW 7 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 82 | 57 | 39 | 15 | 91 | 186 | 184 | 168 | 324 | 250 | 282 | 194 | 161 | 223 | 257 | 181 | 138 | 67 | 14 | 10 | 57 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | glassy | cross | cross-on | on | on | on | cross-on | cross-on | on | on | cross-off | cross-off | off |
High Tide | 4:08PM4.00m | 4:47AM3.95m | 5:03PM4.33m | 5:39AM4.22m | 5:51PM4.60m | 6:24AM4.40m | 6:35PM4.76m | 7:07AM4.48m | 7:17PM4.78m | 7:46AM4.45m | 7:56PM4.66m | 8:25AM4.32m | 8:35PM4.42m | ||||||||
Low Tide | 10:31PM0.52m | 10:49AM0.63m | 11:21PM0.16m | 11:36AM0.38m | 00:05AM-0.10m | 12:18PM0.21m | 00:47AM-0.23m | 12:59PM0.14m | 1:26AM-0.21m | 1:37PM0.19m | 2:03AM-0.04m | 2:15PM0.35m | 2:39AM0.24m | ||||||||
 | |  |  | |  | | | |  | |  | | | | | |  |  | | | |
 | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | — | 9:15 | — | — | 9:13 | — | — | 9:10 | — | — | 9:08 | — | — | 9:07 | — | — | 9:05 | — | — | 9:02 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — |
Temp °C | 16 | 17 | 17 | 21 | 23 | 21 | 21 | 21 | 19 | 21 | 19 | 15 | 15 | 15 | 16 | 16 | 14 | 14 | 13 | 16 | 14 |
Feels °C | 16 | 15 | 16 | 19 | 23 | 20 | 21 | 21 | 21 | 20 | 17 | 13 | 11 | 11 | 13 | 13 | 10 | 12 | 11 | 15 | 11 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 7 | W 7 | W 11 | WSW 10 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | — | W 9 | — | — | — | — | — | WNW 7 | W 7 | W 6 | W 9 |
| kJ | 82 | 57 | 39 | 15 | 91 | 186 | 184 | 168 | 324 | 250 | — | 194 | — | — | — | — | — | 67 | 14 | 7 | 57 |
Swell 2 Height (m) Direction Period (s) | — | S 6 | W 10 | W 9 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 7 | NW 7 | NW 7 |
| kJ | — | 1 | 8 | 6 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | 14 | 8 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | S 6 | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 8 | WSW 7 | — |
| kJ | — | — | 1 | 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 10 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | SE 2 | — | — | — | — | — | — | WSW 10 | — | W 8 | W 8 | W 8 | W 8 | W 8 | — | — | — | — |
| kJ | — | — | — | 2 | — | — | — | — | — | — | 282 | — | 161 | 223 | 257 | 181 | 138 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 11 | 12 | 92 | 16 | 11 | 0 | 92 | 0 | 16 | 138 | 99 | 164 | 164 | 305 | 376 | 422 | 63 | 63 | 63 | 11 |
Best forecast wave conditions in Clare | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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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.
Are you planning a holiday in Clare? If you are looking for accommodation near Crab Island, camping, hotels and holiday cottages in Clare, consider staying in Galway which is 35 km (22 miles) away. Other places in and around Clare where you can find information about places to rent, and car hire include Inis which is 35 km (22 miles) away, Shannon, Foynes and Limerick.
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