Surf Forecasts:
Crab Island surf forecast from 27 Aug 2026:
- Best quality surf: Sunday 30 Aug, 10AM (local time) - 3.5ft (1.0m), 9s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 4PM (local time) - 7ft (2.1m), 8s period, WSW swell with 589 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 10AM (local time) - 3.5ft (1.0m), 9s 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 Sunday (Aug 30) at 10AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.1m and 6s. 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 2.1m 8s and forecast to arrive on Wednesday (Sep 02) at 4PM. 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 Thursday (Aug 27) at 10AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 30th Aug) | 3.5ft (1.0m) 9s |
| Best Surf | 10AM (Sun 30th Aug) | 3.5ft (1.0m) 9s |
| Most Powerful | 4PM (Wed 2nd Sep) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
G’day crew, Rusty here.
Look, I’ll be straight with you – the next couple of weeks are a real mixed bag and there’s a fair bit of patience required. The forecast for Crab Island (Clare) is a tough one. Most of the time the swell is tiny, the wind is blowing the wrong way, or the conditions are just messy. The water temp is sitting at 63°, which is a touch warmer than normal for this time of year, so you can leave the thickest wetsuit at home.
We kick off on Wednesday 26th with a tiny 2 ft west swell, period of 7 seconds, and the energy is weak at 29. Thursday 27th has a bit more size – 2 ft – but the wind is a moderate cross-offshore from the NE. It’s clean, but the waves are still small and weak. Friday 28th and Saturday 29th are even smaller, with messy onshore winds. Sunday 30th sees a slight bump to 3 ft from the WSW with a 10-second period, energy at 158, and the wind is cross-offshore from the SE – clean, but still not enough to get excited about.
Monday 31st is when the swell actually starts to show some teeth. By morning we’ve got 5 ft from the west, period 10 seconds, and the combined energy is moderate at 408. But the wind is howling onshore from the WSW at 15 mph, and it gets worse by afternoon – 6 ft but onshore at 22 mph, making it a choppy, messy mess. Tuesday 1st September is similar with 5 ft and cross-onshore wind, still poor. The pattern continues through Wednesday 2nd and Thursday 3rd – the swell is there, size up to 6 ft, but the wind is always onshore or cross-onshore, so the surf quality is just rubbish.
Friday 4th and Saturday 5th are a bit of a tease. Saturday morning has 7 ft from the west, period 10 seconds, and the energy is strong at 803. But again, the wind is cross-onshore from the SSW at 9 mph. It’s still poor, but it’s the closest we get to anything rideable.
Now, finally, a glimmer of hope. Sunday 6th September morning: the swell drops to 4 ft from the WSW, period 10 seconds, energy moderate at 279, but the wind swings to a light cross-offshore from the SSE at 6 mph. The surf is clean, and the comment says “expect good surf conditions” – it’s a 2/10, but that’s about as good as it gets in this window. Then Monday 7th September morning is the real standout. The wind is glassy – zero from the NNW – the swell is 4 ft from the WNW, period 10 seconds, and the energy is moderate at 353. The waves will be clean, lined up, and the lightest of breezes. This is the pick of the bunch. The swell direction is slightly west of the optimum west, but it’s close enough. The break is a reef, so that long period (10 seconds) will produce some nice shape. Crowds are often here, so expect company.
After that, Tuesday 8th and Wednesday 9th September are back to onshore wind and small, messy waves. Thursday 10th is tiny with a strong onshore gale – just a write-off for surfing.
The long-range stuff on Saturday 5th afternoon and Sunday 6th morning are the only two sessions that get a “marginal” or “good” rating, and even then, Saturday 5th is still cross-onshore. The real standout is Monday 7th morning – glassy, clean, and a solid 4 ft west-northwest swell. If you can get out then, you’ll have the best of it.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Fri night. Very mild (max 19°C on Wed night, min 15°C on Wed night). Winds increasing (calm on Thu night, fresh winds from the NW by Sat afternoon). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Mon night. Very mild (max 17°C on Sun afternoon, min 14°C on Sat night). Winds increasing (light winds from the ENE on Sun afternoon, strong winds from the WSW by Mon night). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 9 | W 9 | W 8 | WNW 8 | W 4 | WNW 7 | W 7 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | W 10 | W 10 | WSW 9 | W 9 | W 8 | W 8 | WSW 8 | WSW 7 | WSW 8 | W 9 |
Wave Graph | |||||||||||||||||||||
81 | 57 | 34 | 19 | 20 | 5 | 4 | 48 | 220 | 185 | 135 | 245 | 220 | 295 | 257 | 161 | 103 | 81 | 197 | 589 | 528 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | on | cross-on | cross-off | cross-off | cross-on | on | cross-off | cross-off | cross-on | on | cross-on | cross-on | cross-on | on | on | cross-off | cross-on | cross-on |
High Tide | 5:42AM3.89m | 5:50PM4.25m | 6:14AM4.08m | 6:22PM4.40m | 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 | |||||||
Low Tide | 11:39AM0.65m | 00:02AM0.30m | 12:10PM0.46m | 00:32AM0.14m | 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 | |||||||
6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:48 | — | — | |
— | 8:38 | — | — | 8:37 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:27 | — | — | 8:24 | — | |
mm | — | 2 | — | — | — | 9 | 3 | — | — | — | 1 | — | — | 2 | 9 | — | — | — | — | — | 34 |
Temp °C | 17 | 18 | 17 | 16 | 16 | 16 | 15 | 16 | 16 | 16 | 17 | 16 | 15 | 15 | 16 | 15 | 15 | 14 | 17 | 17 | 17 |
Feels °C | 15 | 17 | 17 | 15 | 13 | 16 | 12 | 12 | 14 | 14 | 16 | 13 | 11 | 9 | 10 | 10 | 10 | 11 | 14 | 10 | 12 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 8 | WNW 8 | — | W 4 | W 7 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | W 10 | W 10 | — | — | W 8 | W 8 | WNW 8 | SW 16 | SW 16 | SW 15 |
81 | 57 | 34 | 19 | — | 3 | 4 | 48 | 220 | 185 | 135 | 245 | 220 | — | — | 161 | 103 | 44 | 10 | 10 | 9 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | WNW 7 | — | — | — | N 6 | — | — | — | — | — | — | NW 9 | W 16 | — | — | — |
— | — | — | — | — | 5 | — | — | — | 1 | — | — | — | — | — | — | 38 | 5 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 18 | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NE 3 | — | — | WNW 4 | W 4 | — | NNE 3 | WNW 3 | — | — | — | NW 4 | — | WSW 9 | W 9 | — | — | WSW 8 | WSW 7 | WSW 8 | W 9 |
4 | — | — | 3 | 20 | — | 3 | 6 | — | — | — | 8 | — | 295 | 257 | — | — | 81 | 197 | 589 | 528 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 12 | 12 | 63 | 164 | 101 | 244 | 163 | 588 | 67 | 11 | 107 | 138 | 138 | 293 | 431 | 97 | 107 | 0 | 82 | 234 |
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.











