Surf Forecasts:
Crab Island surf forecast from 29 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 1AM (local time) - 3.5ft (1.0m), 8s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 10AM (local time) - 6.5ft (2.0m), 13s period, W swell with 1,298 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 1AM (local time) - 3.5ft (1.0m), 8s period with W 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 Wednesday (Sep 02) at 1AM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.1m and 16s. 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 2.0m 13s and forecast to arrive on Friday (Sep 04) at 10AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Aug 30) at 7AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 2nd Sep) | 3.5ft (1.0m) 8s |
| Best Surf | 1AM (Wed 2nd Sep) | 3.5ft (1.0m) 8s |
| Most Powerful | 10AM (Fri 4th Sep) | 6.5ft (2.0m) 13s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's cookin' at Crab Island over the next couple of weeks.
Well, I gotta be straight with you – this is a tough run to call a surf outlook. The whole 16-day window is a bit of a dud for us. We're looking at a long, painful stretch of poor surf conditions from start to finish. There's a real gap here with no solid options, so don't be holding your breath for any magic sessions.
The first couple of days, starting from the 29th of August, are flat and weak. We're talking tiny dribbles of 0.7 ft from the WNW, with a short period of 7 seconds. The combined energy is barely a whisper at (4). Not worth paddling out for.
We get a little bump in size around the 30th and 31st of August, with the swell pushing up to 5 ft from the W. But the wind is all wrong – mostly onshore or cross-onshore, ranging from a moderate breeze to a fresh breeze. It creates choppy, lumpy conditions that just ruin any chance of a decent wave. The energy ramps up to a moderate (424) by Monday, but it's all for nothing.
As we roll into September, the swell sticks around, getting bigger. In fact, by the 4th of September, we see a significant long-period groundswell hitting 7 ft from the W with a period of 13 seconds, pushing the combined energy up to a strong (1306). But here's the kicker – the wind is hammering straight onshore at 22 mph. For a reef break like Crab Island, that's game over. That long-period swell would be incredible if it were clean, but with that wind, it's going to be a complete washing machine. The setup looks far more interesting for kite surfing than paddle surfing. This is really only for experts if they're feeling masochistic, and only if the conditions miraculously line up, which they don't.
The rest of the period into the second week is more of the same. The swell drops off, pops up again, but is always paired with onshore or strong cross-onshore winds. The water temp is about average for the time of year, so nothing unusual there, but you'll be fighting a messy, blown-out surface. There are glimmers of clean conditions on the morning of the 2nd of September, with a light cross-offshore breeze, but the swell is only 4 ft with a short period of 7 seconds – not enough punch to make it worthwhile.
Honestly, don't bother. This is a blank run for the area. Just keep an eye on the charts because it tends not to stay this poor for long. The forecasts can change.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Fri night. Very mild (max 16°C on Fri night, min 14°C on Fri night). Winds increasing (calm on Sat morning, strong winds from the NW by Sun night). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Mon night. Very mild (max 17°C on Wed morning, min 14°C on Tue night). Winds increasing (light winds from the SSW on Tue night, strong winds from the W by Wed night). | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | WNW 7 | WNW 7 | WSW 9 | WSW 10 | WSW 9 | W 6 | W 10 | W 9 | WSW 8 | W 7 | W 8 | W 8 | WSW 7 | WSW 7 | W 7 | W 8 | W 9 | W 9 | W 13 | W 12 | WSW 9 |
Wave Graph | |||||||||||||||||||||
4 | 9 | 84 | 312 | 283 | 344 | 424 | 347 | 300 | 269 | 235 | 124 | 193 | 279 | 483 | 624 | 702 | 695 | 1298 | 887 | 729 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross | cross-on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-on | on | on | on | on | on | on | on |
High Tide | 6:46AM4.22m | 6:54PM4.48m | 7:17AM4.30m | 7:26PM4.48m | 7:50AM4.29m | 8:01PM4.38m | 8:25AM4.21m | 8:39PM4.20m | 9:04AM4.04m | 9:22PM3.94m | 9:50AM3.81m | 10:16PM3.64m | 10:49AM3.56m | 11:27PM3.35m | |||||||
Low Tide | 12:40PM0.34m | 1:01AM0.06m | 1:12PM0.29m | 1:32AM0.07m | 1:45PM0.32m | 2:05AM0.19m | 2:20PM0.44m | 2:40AM0.41m | 2:59PM0.65m | 3:21AM0.71m | 3:46PM0.92m | 4:11AM1.06m | 4:49PM1.22m | ||||||||
6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | |
— | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:20 | — | |
mm | 1 | — | 2 | — | — | — | — | — | 2 | 1 | — | 1 | 1 | 1 | — | — | 1 | 1 | — | — | — |
Temp °C | 15 | 16 | 15 | 16 | 16 | 15 | 16 | 16 | 15 | 16 | 16 | 16 | 17 | 17 | 16 | 15 | 15 | 15 | 15 | 15 | 15 |
Feels °C | 15 | 14 | 13 | 13 | 14 | 10 | 11 | 11 | 10 | 11 | 13 | 15 | 13 | 11 | 10 | 8 | 8 | 8 | 8 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | W 10 | WSW 9 | WSW 10 | WSW 9 | — | — | — | — | — | W 18 | W 8 | — | NW 11 | — | SW 15 | SW 15 | SW 15 | W 13 | — | WNW 11 |
4 | 2 | 84 | 312 | 283 | — | — | — | — | — | 6 | 124 | — | 5 | — | 8 | 9 | 9 | 1298 | — | 256 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | — | — | — | — | SW 15 | — | — |
— | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | 8 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | WNW 7 | SW 2 | — | — | W 6 | W 10 | W 9 | WSW 8 | W 7 | W 8 | — | WSW 7 | WSW 7 | W 7 | W 8 | W 9 | W 9 | — | W 12 | WSW 9 |
— | 9 | 1 | — | — | 344 | 424 | 347 | 300 | 269 | 235 | — | 193 | 279 | 483 | 624 | 702 | 695 | — | 887 | 729 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 172 | 169 | 16 | 117 | 139 | 328 | 162 | 138 | 138 | 99 | 99 | 0 | 101 | 251 | 162 | 956 | 628 | 630 | 409 | 439 | 138 |
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.











