Surf Forecasts:
Crab Island surf forecast from 12 Aug 2026:
- Best quality surf: Thursday 13 Aug, 4AM (local time) - 4ft (1.2m), 10s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 1AM (local time) - 8ft (2.4m), 9s period, WNW swell with 822 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 4AM (local time) - 4ft (1.2m), 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 Thursday (Aug 13) at 4AM. The primary swell is predicted to be 1.2m and 10s 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 2.4m 9s and forecast to arrive on Thursday (Aug 20) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Monday (Aug 17) at 1AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 13th Aug) | 4ft (1.2m) 10s |
| Best Surf | 4AM (Thu 13th Aug) | 4ft (1.2m) 10s |
| Most Powerful | 1AM (Thu 20th Aug) | 8ft (2.4m) 9s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – this outlook for Crab Island is a tough one. We've got a long stretch ahead with very little to get excited about, so let's break it down.
Looking at the whole 16-day run, the pattern is dominated by poor surf conditions. There's a significant gap right at the start with no real recommendations. The first whisper of anything half-decent doesn't appear until Thursday the 13th of August, and even that is a fleeting moment. After that, we slide back into a long, poor run all the way through to the 24th of August. That's over a week of mostly average to poor waves.
The one and only standout, if you can call it that, is Thursday morning, the 13th of August at Crab Island. We'll see a clean 4ft swell coming from the WSW with a period of 10 seconds. The wind will be a light, cross-offshore breeze from the SSE, keeping the surface clean. The combined swell energy will be moderate at 294, so there's a bit of push behind it. It's a reef break that's fairly consistent, so it might offer a few fun ones for the advanced crew. The water temp is sitting at 62°F, which feels a touch warmer than normal for this time of year, so not a bad bonus. Keep in mind this spot can get crowded, so get in early.
After that window, it's grim. From Thursday afternoon the 13th right through to Monday morning the 24th, we're looking at persistent onshore and cross-onshore winds, choppy conditions, and poor quality waves. The swell tries to build around the 19th and 20th of August, with wave heights up to 6ft and strong energy readings (over 500), but it's completely blown out by strong onshore winds. That kind of messy, lumpy, onshore power would be more interesting for a kite session than a paddle surf.
The only other slight chance appears on Monday morning, the 24th of August. We get a brief moment of glassy conditions with a light 3 mph wind from the SW and a 4ft swell from the W. The swell period is a short 8 seconds, and the energy is moderate at 157, but it's described as "surfable waves but very ordinary conditions". It's not a standout, but if you're desperate, it's the cleanest looking paddle of the whole two weeks after the 13th.
So, to sum it up: your best bet is that Thursday morning on the 13th. After that, it's a waiting game until the 24th for a chance at a glassy but average wave. The forecast can always change, but as it stands, it's a lean run for Crab Island.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu night. Warm (max 21°C on Wed afternoon, min 13°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Tue morning. Very mild (max 17°C on Tue morning, min 13°C on Sat night). Winds increasing (calm on Sat night, strong winds from the SSW by Tue morning). | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 9 | WSW 10 | WSW 10 | W 10 | W 9 | W 8 | W 8 | W 8 | W 8 | WNW 8 | W 7 | NW 7 | W 7 | W 8 | WSW 8 | WSW 7 | WSW 7 | WSW 6 | W 8 | W 9 |
Wave Graph | ||||||||||||||||||||
164 | 324 | 294 | 231 | 230 | 138 | 161 | 153 | 71 | 40 | 35 | 14 | 14 | 105 | 96 | 114 | 79 | 179 | 319 | 607 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | cross | cross-off | cross-on | cross-on | on | cross-on | on | on |
High Tide | 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 | 9:02AM4.12m | 9:15PM4.10m | 9:40AM3.86m | 9:56PM3.74m | |||||||
Low Tide | 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 | 2:53PM0.59m | 3:15AM0.60m | 3:32PM0.90m | 3:52AM0.99m | |||||||
— | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | |
— | 9:10 | — | — | 9:08 | — | — | 9:07 | — | — | 9:05 | — | — | 9:02 | — | — | 9:00 | — | 8:59 | — | |
mm | — | — | — | — | 1 | — | — | — | — | — | 1 | — | — | 2 | 1 | — | — | 2 | 1 | — |
Temp °C | 21 | 19 | 21 | 21 | 16 | 15 | 15 | 16 | 14 | 14 | 14 | 14 | 15 | 15 | 16 | 16 | 16 | 17 | 15 | 15 |
Feels °C | 21 | 20 | 21 | 21 | 14 | 11 | 10 | 12 | 11 | 10 | 11 | 12 | 14 | 13 | 15 | 12 | 14 | 10 | 7 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 10 | WSW 10 | W 10 | — | W 8 | — | W 8 | W 8 | W 7 | W 7 | NW 7 | W 7 | W 8 | WSW 8 | W 18 | — | — | SW 17 | SW 17 |
164 | 324 | 294 | 231 | — | 138 | — | 153 | 71 | 38 | 35 | 14 | 14 | 105 | 96 | 6 | — | — | 12 | 12 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | WNW 8 | WNW 8 | WNW 7 | WSW 7 | NW 7 | NW 7 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | 42 | 40 | 21 | 10 | 8 | 2 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 6 | W 11 | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | 7 | 3 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | W 9 | — | W 8 | — | — | NW 3 | — | — | — | SSE 2 | — | WSW 7 | WSW 7 | WSW 6 | W 8 | W 9 |
— | — | — | — | 230 | — | 161 | — | — | 2 | — | — | — | 1 | — | 114 | 79 | 179 | 319 | 607 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 92 | 12 | 0 | 117 | 373 | 108 | 108 | 138 | 127 | 661 | 63 | 63 | 63 | 0 | 16 | 101 | 101 | 101 | 292 | 97 |
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.











