
Surf Forecasts:
Crab Island surf forecast from 4 Aug 2026:
- Best quality surf: Sunday 9 Aug, 4AM (local time) - 4ft (1.2m), 8s period, WNW swell with glassy winds.
- Most powerful swell: Friday 7 Aug, 10PM (local time) - 5ft (1.5m), 10s period, W swell with 443 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 4AM (local time) - 4ft (1.2m), 8s period with WNW 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 Sunday (Aug 09) at 4AM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.3m and 7s. 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 1.5m 10s and forecast to arrive on Friday (Aug 07) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Aug 11) at 1PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sun 9th Aug) | 4ft (1.2m) 8s |
| Best Surf | 4AM (Sun 9th Aug) | 4ft (1.2m) 8s |
| Most Powerful | 10PM (Fri 7th Aug) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, listen up. We got a long stretch here, and the start is a total bummer. The first week at Crab Island is mostly junk. Onshore winds, lumpy, messy, and just not worth your time. The swell energy is weak, barely registering in the low double digits (13, 52, 38) for the first few days. You’ll be looking at a lot of poor surf, and the water is 62°F, which is about normal. Nothing to get excited about.
The first real window is the morning of Sunday the 9th. The wind goes glassy, and we get a clean 5ft wave from the WNW with a 9-second period. The energy is a solid 307, so there's a little push. It’s a small, clean window, but the afternoon has onshore wind and it’s gone.
From the 10th to the 12th, it’s back to the same old story. Small swell, messy wind, and the energy stays in the low to mid-100s (158, 100, 123, 159, 172). It’s just weak and not worth the paddle.
Then we get a push of bigger swell on the 13th and 14th. The swell is there, but the wind is straight onshore, and it’s going to be a chaotic mess. The 13th sees 7ft to 8ft waves with energy readings of 675 and 775. That’s a lot of water, but it’s blown out and ugly. Too big for the beginners, and just a battle for everyone else. The 14th has a cross-offshore wind from the ESE, which helps, but the swell is dropping and the period is short. The energy is still high (495, 262), but the quality is just marginal.
The 15th and 16th are small and weak again. The 15th has a fresh offshore wind from the ESE, but only 2ft of swell. It’s clean, but there’s nothing to ride. The 16th is glassy in the morning, but again, just 3ft of weak swell.
Now, here’s the good stuff. The morning of Monday the 17th is the standout. It’s glassy, with a long-period swell from the W at 12 seconds, pushing 6ft. The energy jumps to 773, which is a strong, powerful groundswell. This is serious. The long period is going to make it powerful and lined up on the reef. It’s a real standout, but it’s eight days out, so think of it as promising, not a guarantee.
The 18th is a step down, still big but with a shorter period and more onshore wind. Marginal at best. Then the 19th gives us another shot. The morning has a light cross-offshore breeze from the SE, and a solid 6ft WNW swell with a 9-second period. The energy is 513, which is strong. This looks like a very good morning with clean conditions and a decent-sized swell. The direction is right, and the wind is right. Another standout, but again, it's a long-range call.
So, the first week is a painful wait. The best of it is the 17th morning, with the 19th morning as a close second. Both are long-range, so keep your fingers crossed. The 9th morning is the only thing in the near term that’s worth a paddle, but it’s small. If you’re a beginner, the 17th and 19th are too big. For the experts, that’s your time. The rest of the time, it’s a lot of frustrated staring at the ocean.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Tue morning. Very mild (max 16°C on Tue morning, min 14°C on Tue night). Winds increasing (light winds from the W on Tue morning, strong winds from the NW by Tue night). | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Sat morning. Very mild (max 17°C on Fri afternoon, min 14°C on Sat night). Winds decreasing (fresh winds from the SSW on Sat morning, calm by Sat night). | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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 7 | WNW 4 | NW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | W 6 | W 5 | W 5 | W 9 | W 10 | WSW 8 | WSW 8 | WNW 8 | WNW 9 | WNW 9 | W 9 | W 8 | W 6 | W 7 |
Wave Graph | |||||||||||||||||||||
5 | 50 | 216 | 238 | 155 | 95 | 35 | 38 | 24 | 69 | 258 | 363 | 354 | 157 | 180 | 300 | 295 | 186 | 156 | 74 | 66 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross | cross-on | on | on | glassy | on | on | on | on | cross-off |
High Tide | 9:48PM3.89m | 10:21AM3.73m | 10:38PM3.67m | 11:16AM3.58m | 11:41PM3.47m | 12:24PM3.48m | 1:00AM3.35m | 1:43PM3.50m | 2:26AM3.42m | 3:01PM3.69m | 3:44AM3.65m | 4:08PM4.00m | |||||||||
Low Tide | 3:25PM0.83m | 3:49AM0.70m | 4:11PM1.03m | 4:39AM0.95m | 5:11PM1.23m | 5:45AM1.20m | 6:36PM1.35m | 7:17AM1.32m | 8:15PM1.24m | 8:48AM1.20m | 9:32PM0.91m | 9:55AM0.93m | 10:31PM0.52m | ||||||||
5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | — | 9:27 | — | — | 9:24 | — | — | 9:22 | — | — | 9:21 | — | — | 9:19 | — | — | 9:16 | — | — | 9:15 | |
mm | 2 | — | 1 | — | — | — | — | — | — | — | — | 2 | 6 | 1 | 2 | 5 | — | — | — | — | 1 |
Temp °C | 16 | 16 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 17 | 16 | 16 | 16 | 15 | 14 | 16 | 15 | 15 | 17 | 18 |
Feels °C | 15 | 11 | 7 | 6 | 7 | 8 | 10 | 11 | 12 | 11 | 14 | 12 | 11 | 15 | 14 | 14 | 15 | 13 | 14 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | SW 7 | SW 7 | — | — | — | W 10 | — | W 9 | W 12 | WNW 11 | W 10 | WNW 9 | WSW 8 | SW 7 | SW 7 | SW 6 | W 9 | W 11 | WNW 8 | W 7 |
5 | 2 | 2 | — | — | — | 17 | — | 15 | 3 | 24 | 363 | 119 | 157 | 18 | 7 | 2 | 186 | 2 | 24 | 66 | |
Swell 2 Height (m) Direction Period (s) | W 9 | — | — | — | — | — | — | — | W 12 | — | — | — | — | WNW 9 | — | — | — | — | — | W 10 | W 10 |
2 | — | — | — | — | — | — | — | 3 | — | — | — | — | 137 | — | — | — | — | — | 2 | 8 | |
Swell 3 Height (m) Direction Period (s) | W 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 6 |
2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | |
Wind waves Height (m) Direction Period (s) | WSW 3 | WNW 4 | NW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | W 6 | W 5 | W 5 | W 9 | — | WSW 8 | — | WNW 8 | WNW 9 | WNW 9 | — | W 8 | W 6 | — |
4 | 50 | 216 | 238 | 155 | 95 | 35 | 38 | 24 | 69 | 258 | — | 354 | — | 180 | 300 | 295 | — | 156 | 74 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 248 | 271 | 329 | 617 | 617 | 655 | 353 | 545 | 92 | 92 | 97 | 97 | 101 | 92 | 63 | 0 | 87 | 97 | 82 | 67 | 0 |
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.











