Surf Forecasts:
Crab Island surf forecast from 14 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10AM (local time) - 3ft (0.9m), 8s period, W swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 10AM (local time) - 10ft (3.0m), 10s period, WNW swell with 1,377 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10AM (local time) - 3ft (0.9m), 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 Thursday (Aug 20) at 10AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.1m and 15s. 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 3.0m 10s and forecast to arrive on Wednesday (Aug 19) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Friday (Aug 21) at 1AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 20th Aug) | 3ft (0.9m) 8s |
| Best Surf | 10AM (Thu 20th Aug) | 3ft (0.9m) 8s |
| Most Powerful | 10AM (Wed 19th Aug) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Gutted is the word, folks. I’ve been staring at the charts for the next couple of weeks and it’s a proper slow burn. For a stretch here, the surf is just not happening. We’re looking at a big gap of flat, messy days from right now through to the start of next week. The few bits of energy we see are weak and chopped up, with cross-onshore winds doing their best to ruin anything. It’s a write-off, plain and simple.
The best of the first week is, honestly, not good. We see a pulse of moderate energy building into Tuesday the 18th and Wednesday the 19th, with swell from the W and WNW pushing up to 7 ft. But the wind is on it or cross-onshore, and it’s messy. That’s a “stay at home and check the webcam” kind of surf. Not worth the paddle.
There’s another weak kick around Thursday the 27th of August, where a bit of a longer period WNW swell shows up, but it’s still small and clean. The air gets glassy on the Saturday the 22nd, but there’s only 1 ft of swell. Painful.
Then, hold onto your boardies, because the 28th of August is where things go absolutely mental. We’re talking a massive, very strong energy reading of 11355 on Friday morning, with a 14-second period W groundswell stacking up to a solid 18 ft. The direction is right, the tide is right, but this is way, way too big for Crab Island. This is expert-only, and even then, it’s dangerous. The wind is clean, but it doesn’t matter when the ocean is that angry. The same goes for Saturday the 29th, with a still-too-big 12 ft on offer. This isn’t surf; it’s a survival mission.
So, what’s the one to pick out of the rubble? The standout, and I’m saying this with a lot of caution, is the Thursday afternoon of the 27th of August. We get a jump in swell to 7 ft from the WSW, the wind goes light and cross-off, and the energy jumps to 470. It’s still a week and a half out, so treat it as promising, not a promise. But it’s the only window with size and decent conditions before the ocean just goes nuts.
A quick word on the water: at Crab Island, it’s 63°, which is a touch warmer than normal for this time of year. Not a game-changer, but you might get away with a thinner suit.
So, there you have it. A long, flat stretch, one very promising but distant day, and then a monster swell. Keep your expectations low for a while and be ready to move if that Thursday window firms up.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun morning. Very mild (max 16°C on Fri morning, min 13°C on Fri night). Winds decreasing (fresh winds from the NW on Fri afternoon, light winds from the W by Sat night). | Days 4-6 Weather SummarySome drizzle, heaviest during Mon afternoon. Very mild (max 17°C on Mon morning, min 14°C on Wed night). Winds decreasing (strong winds from the W on Tue night, light winds from the N by Wed night). | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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 8 | W 8 | W 7 | WNW 7 | NW 7 | WSW 7 | W 8 | W 8 | WSW 5 | W 7 | W 8 | W 9 | W 9 | WNW 10 | WNW 10 | WNW 9 | W 8 | W 9 | W 9 |
Wave Graph | |||||||||||||||||||||
113 | 66 | 124 | 72 | 37 | 21 | 10 | 175 | 165 | 80 | 140 | 235 | 418 | 685 | 950 | 1377 | 959 | 276 | 105 | 56 | 39 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | cross | cross-on | on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-off | on | cross-off |
High Tide | 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 | 10:21AM3.58m | 10:42PM3.39m | 11:09AM3.32m | 11:40PM3.09m | ||||||||
Low Tide | 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 | 4:15PM1.23m | 4:35AM1.37m | 5:11PM1.54m | ||||||||
6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | |
— | — | 9:07 | — | — | 9:05 | — | — | 9:02 | — | — | 9:00 | — | 8:59 | — | — | 8:57 | — | — | 8:54 | — | |
mm | — | — | — | — | — | — | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 14 | 14 | 14 | 14 | 15 | 16 | 15 | 17 | 17 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 15 | 16 | 15 |
Feels °C | 13 | 12 | 9 | 11 | 10 | 11 | 11 | 13 | 13 | 12 | 11 | 13 | 10 | 10 | 8 | 8 | 9 | 11 | 14 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 8 | W 8 | NW 8 | WNW 7 | W 4 | — | W 8 | W 8 | — | — | W 17 | SW 17 | — | SW 17 | SW 16 | WNW 9 | W 8 | W 9 | W 9 |
113 | 66 | 124 | 72 | 28 | 21 | 8 | — | 165 | 80 | — | — | 5 | 11 | — | 11 | 10 | 276 | 105 | 56 | 39 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | WNW 8 | — | W 7 | NW 7 | — | NW 7 | — | — | — | — | — | — | — | — | SW 16 | SW 15 | WNW 8 | WNW 8 |
— | — | — | 22 | — | 14 | 8 | — | 2 | — | — | — | — | — | — | — | — | 10 | 9 | 24 | 22 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | WSW 7 | WSW 7 | — | — | — | — | — | — | — | — | — | — | — | — | SW 15 | SW 14 |
— | — | — | — | — | 11 | 10 | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 8 | |
Wind waves Height (m) Direction Period (s) | — | WNW 4 | — | — | W 7 | — | SSW 3 | WSW 7 | — | — | WSW 5 | W 7 | W 8 | W 9 | W 9 | WNW 10 | WNW 10 | — | — | — | NE 2 |
— | 15 | — | — | 37 | — | 3 | 175 | — | — | 140 | 235 | 418 | 685 | 950 | 1377 | 959 | — | — | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 108 | 109 | 108 | 138 | 646 | 82 | 101 | 99 | 101 | 98 | 248 | 670 | 97 | 617 | 617 | 1115 | 353 | 97 | 0 | 63 | 12 |
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.











