Surf Forecasts:
Crab Island surf forecast from 5 Sep 2026:
- Best quality surf: Saturday 12 Sep, 1AM (local time) - 6ft (1.9m), 11s period, WNW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 7AM (local time) - 11ft (3.5m), 11s period, W swell with 2,822 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 1AM (local time) - 6ft (1.9m), 11s 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 Saturday (Sep 12) at 1AM. The primary swell is predicted to be 1.9m and 11s period. 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 11s and forecast to arrive on Tuesday (Sep 08) at 7AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Sep 06) at 10AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sat 12th Sep) | 6ft (1.9m) 11s |
| Best Surf | 1AM (Sat 12th Sep) | 6ft (1.9m) 11s |
| Most Powerful | 7AM (Tue 8th Sep) | 11ft (3.5m) 11s |
Table - best surf conditions forecast for Crab Island over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about what’s cooking at Crab Island.
First off, the next week and a half is a bit of a write-off. The wind is just not playing ball, and we’ve got a whole lot of days with strong onshore or cross-onshore winds. The swell shows up, but the conditions are mostly messy, choppy, or blown out. Not much to get excited about.
Your first real chance to look at comes around Saturday, September 12th. On Saturday morning, we’ve got a 5ft swell coming from the WNW with a moderate, clean offshore breeze from the east. The period is a solid 11 seconds, so there’s some proper groundswell energy in the water (622). That’s around the best we’ll see in this whole run. The wind is offshore and the surf looks clean. The water temp is about average for the time of year, so nothing weird there. Keep in mind this break is a reef setup, so it’s one for the advanced crew. You’ll likely have some company, too – it’s often crowded.
Sunday, September 13th, morning and afternoon, the swell drops right off to 3ft and 2ft, with light offshore breezes. It’s clean but small – only 123 and 102 for energy. Good for a longboard or a fun little cruiser session, but not a standout.
The following Saturday, September 19th, the morning looks clean again with a light cross-off breeze from the SSE, but it’s only 3ft from the WNW, so very ordinary. The energy is weak (110). Then Sunday, September 20th, the morning is glassy as it gets – no wind – but the swell is tiny at 2ft from the west, with only 76 energy. A glassy session is always worth a paddle, but don’t expect much push.
If I had to pick the best of the lot, it’s that Saturday, September 12th morning. Offshore wind, 5ft of long-period groundswell, and clean conditions. That’s the one to circle.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Very mild (max 19°C on Sun morning, min 14°C on Sat afternoon). Winds increasing (light winds from the S on Sat morning, strong winds from the SW by Sun night). | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Mon night. Very mild (max 16°C on Wed night, min 13°C on Wed afternoon). Winds decreasing (strong winds from the W on Mon night, moderate winds from the WNW by Tue night). | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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 10 | W 10 | W 9 | WSW 8 | WSW 10 | WSW 14 | WSW 10 | W 10 | W 11 | W 11 | W 11 | WNW 10 | W 9 | W 9 | WSW 8 | W 8 | W 10 | W 9 | W 8 | W 8 | WNW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 709 | 363 | 189 | 181 | 821 | 2420 | 1787 | 1872 | 2401 | 2622 | 2108 | 951 | 372 | 343 | 408 | 257 | 509 | 481 | 439 | 512 | 944 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-off | cross-on | on | cross-on | on | on | on | on | cross-on | on | cross-on | on | cross-on | cross-on | on | cross-on | on | cross-off |
High Tide | 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 | 6:03AM4.44m | 6:13PM4.70m | ||||||||
Low Tide | 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 | 11:59AM0.15m | 00:22AM-0.19m | |||||||
 | |  | | |  |  |  |  | |  | | | | |  | | | | | | |
 | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — |
 | — | 8:17 | — | — | 8:15 | — | — | 8:13 | — | — | 8:10 | — | — | 8:07 | — | — | 8:06 | — | — | 8:04 | — |
mm | — | — | 1 | — | — | — | 1 | — | 5 | 1 | 1 | — | — | 3 | 2 | — | 1 | — | — | — | 4 |
Temp °C | 15 | 16 | 18 | 19 | 17 | 16 | 15 | 15 | 14 | 15 | 14 | 15 | 15 | 14 | 16 | 16 | 16 | 16 | 14 | 14 | 14 |
Feels °C | 11 | 12 | 14 | 14 | 10 | 11 | 8 | 7 | 6 | 7 | 6 | 8 | 10 | 9 | 12 | 12 | 11 | 11 | 9 | 10 | 12 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | W 9 | WSW 8 | W 18 | — | — | — | — | — | — | — | — | — | W 12 | W 8 | — | — | — | — | — |
| kJ | 709 | 363 | 189 | 181 | 6 | — | — | — | — | — | — | — | — | — | 11 | 257 | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 7 | 7 | 7 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSE 3 | S 4 | WSW 10 | WSW 14 | WSW 10 | W 10 | W 11 | W 11 | W 11 | WNW 10 | W 9 | W 9 | WSW 8 | — | W 10 | W 9 | W 8 | W 8 | WNW 11 |
| kJ | — | — | 3 | 18 | 821 | 2420 | 1787 | 1872 | 2401 | 2622 | 2108 | 951 | 372 | 343 | 408 | — | 509 | 481 | 439 | 512 | 944 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 11 | 16 | 411 | 615 | 138 | 574 | 453 | 162 | 453 | 617 | 687 | 92 | 97 | 97 | 117 | 627 | 162 | 498 | 97 | 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.
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