
Surf Forecasts:
Crab Island surf forecast from 4 Sep 2026:
- Best quality surf: Saturday 5 Sep, 4PM (local time) - 4.5ft (1.4m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 1PM (local time) - 11ft (3.5m), 12s period, W swell with 3,309 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 4PM (local time) - 4.5ft (1.4m), 10s 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 Saturday (Sep 05) at 4PM. The primary swell is predicted to be 1.4m and 10s period with a secondary swell of 0.1m and 13s. 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 3.5m 12s and forecast to arrive on Friday (Sep 04) at 1PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Sunday (Sep 06) at 10AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sat 5th Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 4PM (Sat 5th Sep) | 4.5ft (1.4m) 10s |
| Most Powerful | 1PM (Fri 4th Sep) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for Crab Island (Clare) over the next couple of weeks.
Straight up, this is a tough stretch. This is an advanced reef break that’s fairly consistent, but the wind and conditions are just not playing ball for a long, long time. We’re looking at a massive gap of over a week before anything even remotely rideable shows up. The first proper surf recommendation doesn’t hit until Saturday the 12th of September.
For the first week, it’s a write-off. We’ve got howling westerly winds, strong breeze conditions, and a lot of onshore and cross-onshore slop. The swell is there – in fact, we see a big 12ft W swell pumping on Friday the 4th with a combined energy of 3274 – that’s strong wave energy right there – but it’s accompanied by a 28 mph onshore wind. That’s just a washing machine. No good for surfing. The pattern continues with messy, lumpy, or choppy conditions through until the 11th. Even when the swell drops to 4ft on Sunday the 6th, the wind is still a fresh 22 mph cross-off, so it’s not clean enough to call a goer.
Now, the light at the end of the tunnel. Saturday the 12th of September is your best bet. The morning session is the standout. We’ve got a 4ft W-N-W swell, 11 seconds period, with a light 6 mph offshore breeze from the E-N-E. That’s clean. The combined energy is moderate at 517, but with that offshore wind and a solid period, this reef should start to hold a nice shape. This is for advanced surfers only – the reef demands respect. The afternoon on the same day gets a bit tricky with a cross-shore wind, but the morning is the clear window.
Sunday the 13th of September morning is also worth a mention. We get a 5ft W swell, 10 seconds, with glassy conditions. That’s a rare treat. The wind is basically dead calm at 3 mph from the S-E. The combined energy is 407, so moderate, but the glassy surface will make it look better than the size suggests. The afternoon goes back to cross-on shore, so get out early.
Beyond that, the second week just fades out. Another pulse of 10ft W swell on Monday the 14th is ruined by a 19 mph cross-on wind. The energy is strong (1130-1576), but the wave quality is just poor. It’s a kite-surfing setup at that point, not a paddle-surfing one. The rest of the week is small, messy, and generally not worth getting the wetsuit on for.
So, to sum it up: the only real standouts are the Saturday 12th morning and the Sunday 13th morning at Crab Island. The rest of the forecast is a long, frustrating wait. The water temperature is about average for the time of year.
Stay patient, and keep an eye on the long-range. Forecasts can change.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu night. Warm (max 20°C on Sun morning, min 14°C on Thu night). Winds decreasing (strong winds from the W on Fri morning, light winds from the SE by Sat afternoon). | Days 4-6 Weather SummaryHeavy rain (total 25mm), heaviest during Mon afternoon. Very mild (max 16°C on Sun night, min 13°C on Mon afternoon). Mainly strong winds. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 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) | W 12 | W 12 | W 12 | W 10 | W 10 | WNW 9 | WSW 8 | WSW 10 | WSW 14 | WSW 10 | W 10 | W 9 | W 10 | W 10 | W 10 | W 9 | WSW 7 | WSW 8 | W 9 | W 10 | W 9 |
Wave Graph | |||||||||||||||||||||
3274 | 3100 | 1731 | 709 | 363 | 108 | 197 | 718 | 2234 | 1402 | 942 | 993 | 1802 | 1490 | 830 | 398 | 214 | 534 | 619 | 580 | 509 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-off | cross-off | cross-off | cross | on | on | cross-on | on | on | on | on | on | cross-on | on | on | cross-on | cross-on |
High Tide | 10:49AM3.56m | 11:27PM3.35m | 12:06PM3.39m | 00:58AM3.23m | 1:37PM3.42m | 2:31AM3.36m | 2:58PM3.67m | 3:44AM3.66m | 4:01PM4.02m | 4:39AM3.98m | 4:51PM4.35m | 5:24AM4.26m | 5:34PM4.59m | ||||||||
Low Tide | 4:11AM1.06m | 4:49PM1.22m | 5:24AM1.39m | 6:28PM1.39m | 7:15AM1.51m | 8:19PM1.23m | 8:50AM1.29m | 9:32PM0.84m | 9:52AM0.95m | 10:24PM0.44m | 10:40AM0.61m | 11:07PM0.10m | 11:21AM0.33m | 11:46PM-0.11m | |||||||
6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | |
— | 8:20 | — | — | 8:17 | — | — | 8:15 | — | — | 8:13 | — | — | 8:10 | — | — | 8:07 | — | — | 8:06 | — | |
mm | — | — | — | — | — | 1 | — | — | — | — | 17 | 5 | — | 1 | — | — | 2 | 4 | 1 | — | — |
Temp °C | 15 | 15 | 15 | 14 | 16 | 17 | 20 | 19 | 16 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 17 | 16 | 15 | 14 |
Feels °C | 7 | 8 | 9 | 11 | 12 | 12 | 16 | 13 | 11 | 10 | 7 | 6 | 6 | 6 | 9 | 10 | 10 | 13 | 11 | 9 | 6 |
Swell 1 Height (m) Direction Period (s) | — | — | — | W 10 | W 10 | WSW 7 | WSW 8 | W 18 | — | — | W 10 | — | — | — | — | — | WSW 7 | — | — | — | — |
— | — | — | 709 | 363 | 70 | 197 | 7 | — | — | 942 | — | — | — | — | — | 214 | — | — | — | — | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 14 | SW 13 | WNW 9 | — | — | — | — | — | — | — | — | — | — | WNW 9 | — | — | — | — |
— | — | — | 7 | 7 | 108 | — | — | — | — | — | — | — | — | — | — | 32 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 13 | — | — | — | — | — | — | — | — | — | — | W 13 | — | — | — | — |
— | — | — | — | — | 7 | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | W 12 | W 12 | W 12 | — | — | S 3 | SSE 4 | WSW 10 | WSW 14 | WSW 10 | — | W 9 | W 10 | W 10 | W 10 | W 9 | — | WSW 8 | W 9 | W 10 | W 9 |
3274 | 3100 | 1731 | — | — | 5 | 14 | 718 | 2234 | 1402 | — | 993 | 1802 | 1490 | 830 | 398 | — | 534 | 619 | 580 | 509 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 498 | 617 | 97 | 27 | 0 | 16 | 299 | 413 | 162 | 138 | 300 | 162 | 617 | 617 | 498 | 97 | 138 | 101 | 145 | 610 | 498 |
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.










