
Surf Forecasts:
Crab Island surf forecast from 6 Sep 2026:
- Best quality surf: Friday 11 Sep, 10PM (local time) - 3.5ft (1.1m), 8s period, W swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 1AM (local time) - 7.5ft (2.3m), 14s period, WSW swell with 2,114 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 10PM (local time) - 3.5ft (1.1m), 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 Friday (Sep 11) at 10PM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.3m and 14s. 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 2.3m 14s and forecast to arrive on Monday (Sep 07) at 1AM. 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+) | 10PM (Fri 11th Sep) | 3.5ft (1.1m) 8s |
| Best Surf | 10PM (Fri 11th Sep) | 3.5ft (1.1m) 8s |
| Most Powerful | 1AM (Mon 7th Sep) | 7.5ft (2.3m) 14s |
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 our little slice of the coast at Crab Island. I’ve got to be straight with you – this 16-day outlook is a tough one for us paddle surfers. The numbers are telling me the wind is going to be a constant battle, and the swell is mostly messy. We’ve got a long stretch of poor surf conditions ahead, so let’s not kid ourselves.
The first real chance of anything even worth mentioning comes late in the run. The pattern shows a constant onslaught of cross-onshore and onshore wind for the vast majority of the period, with a few glimmers of hope right at the end.
From Sunday the 6th to the 16th, it’s a write-off. The wind is howling from the SSE, SW, and WNW mostly, with speeds regularly hitting 22 mph to 25 mph. That’s a strong breeze. The swell is there, but it’s blown out. We’re looking at a messy, lumpy, choppy ocean. The combined energy of all swells directed here is a weak 153 early on Sunday, then it jumps up. On Monday the 7th, we get a big 8 ft swell from the WSW with a period of 13 seconds – that’s a groundswell, and it’s got real energy (2008). But the wind is howling onshore, so it’s just a big, bumpy mess. Not for the faint of heart, even for advanced crew. That’s the story for days.
We finally get a break in the madness on Wednesday the 16th. The morning offers a 5 ft swell from the W with a 10-second period. The wind shifts to a SSE cross-off at 16 mph, and for the first time in a while, the waves are described as *clean*. The energy is a moderate 408. It’s a marginal call, but it’s the only window with decent wind. The afternoon turns back to poor conditions, so that morning session is the window.
Then, the very end of the run. Friday the 18th shows some promise. The morning has a 7 ft swell from the WSW with a 9-second period, and a gentle 9 mph onshore wind. The afternoon gets even better: a 6 ft swell from the WSW, period of 9 seconds, and a light breeze of 6 mph. The energy is moderate (705 and 653). Again, it’s marginal, but that Friday afternoon looks like the cleanest, most manageable surf of the whole 16 days. The wind is light, the swell is a decent size, and it’s the best we’ve got.
For a standout, I’d be circling Friday 18th September. The afternoon session at Crab Island looks the most promising. We’ll have a 6 ft swell from the WSW, and with a light breeze, it could actually be clean. It’s still a bit of a gamble, but it’s the only real bet for a decent paddle. The 8 ft days earlier are too big and too windy for most, and the rest is just a battle.
Remember, this is a reef break, advanced, and it’s fairly consistent, but it’s exposed to the swell. The water’s going to be about average for this time of year.
So, get your gear sorted for that Friday the 18th, and keep your eyes peeled for that Thursday morning on the 16th. It’s a long wait, but the ocean might just give us a little something.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Mon afternoon. Very mild (max 19°C on Sun morning, min 13°C on Mon afternoon). Mainly strong winds. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Wed night. Very mild (max 16°C on Thu morning, min 13°C on Wed night). Winds decreasing (fresh winds from the NW on Tue night, light winds from the W by Fri afternoon). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 8 | WSW 10 | WSW 14 | WSW 13 | WSW 10 | W 9 | WNW 9 | WNW 10 | WNW 10 | W 9 | W 8 | WSW 7 | WSW 8 | WSW 10 | W 9 | W 8 | W 8 | W 8 | WNW 12 | WSW 10 | W 9 |
Wave Graph | |||||||||||||||||||||
146 | 732 | 2114 | 2008 | 1260 | 685 | 976 | 1064 | 860 | 311 | 223 | 160 | 333 | 452 | 372 | 217 | 172 | 161 | 293 | 1393 | 664 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | on | cross-on | on | on | cross-on | cross-on | cross-on | on | cross-on | cross | cross | cross-on | on | cross-on | cross-on | cross-off | cross | cross-on | cross-on |
High Tide | 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 | 6:03AM4.44m | 6:13PM4.70m | 6:40AM4.52m | 6:51PM4.69m | ||||||||
Low Tide | 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 | 11:59AM0.15m | 00:22AM-0.19m | 12:35PM0.08m | 00:57AM-0.12m | |||||||
6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | |
— | 8:15 | — | — | 8:13 | — | — | 8:10 | — | — | 8:07 | — | — | 8:06 | — | — | 8:04 | — | — | 8:00 | — | |
mm | 2 | — | — | 1 | 8 | 3 | — | — | — | — | — | 3 | — | — | 2 | — | — | 1 | 1 | — | — |
Temp °C | 19 | 18 | 16 | 16 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 14 | 16 | 16 | 16 | 14 | 14 | 15 | 17 | 17 | 17 |
Feels °C | 15 | 12 | 11 | 9 | 8 | 8 | 5 | 6 | 7 | 9 | 10 | 10 | 14 | 13 | 12 | 9 | 11 | 9 | 14 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | W 18 | — | — | — | — | — | — | — | W 9 | W 13 | WSW 7 | WSW 8 | — | — | W 8 | W 8 | W 8 | WNW 12 | — | — |
146 | 7 | — | — | — | — | — | — | — | 311 | 3 | 160 | 333 | — | — | 217 | 172 | 161 | 293 | — | — | |
Swell 2 Height (m) Direction Period (s) | SW 13 | — | — | — | — | — | — | — | — | — | — | W 12 | — | — | — | — | W 14 | WNW 14 | — | — | — |
7 | — | — | — | — | — | — | — | — | — | — | 11 | — | — | — | — | 4 | 105 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | S 4 | WSW 10 | WSW 14 | WSW 13 | WSW 10 | W 9 | WNW 9 | WNW 10 | WNW 10 | — | W 8 | — | — | WSW 10 | W 9 | — | — | SE 2 | SW 8 | WSW 10 | W 9 |
14 | 732 | 2114 | 2008 | 1260 | 685 | 976 | 1064 | 860 | — | 223 | — | — | 452 | 372 | — | — | 1 | 177 | 1393 | 664 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 600 | 598 | 138 | 97 | 269 | 162 | 162 | 627 | 498 | 97 | 138 | 101 | 92 | 99 | 409 | 108 | 108 | 11 | 97 | 97 | 97 |
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.










