Crab Island Surf Break

Lat Long: 53.04° N 9.39° W

Crab Island Surf Forecast and Surf Report

Issued: 12 am 07 Sep 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
16.6°C
1.3° 

Crab Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Crab Island surf forecast from 7 Sep 2026:

  • Most powerful swell: Monday 7 Sep, 10AM (local time) - 8ft (2.4m), 13s period, WSW swell with 1,815 kJ wave energy.

Best Forecast Surf Conditions for Crab Island this week:

The most powerful waves expected at Crab Island in the next 16 days are 2.4m 13s and forecast to arrive on Monday (Sep 07) 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 0.5m 3s period and expected on Thursday (Sep 10) at 4AM.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful10AM (Mon 7th Sep)8ft (2.4m) 13s

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 the next couple of weeks.

Honestly, it’s a rough start. We’re looking at a solid block of poor conditions right through the first week and into the second. The wind is just relentless, howling from the southwest and northwest, and it’s messing up everything. You’ll see some serious swell energy come through—like 1815 (moderate) on Monday the 7th and 2038 (strong) on the 14th—but the onshore and cross-onshore wind is going to leave it all lumpy and chopped out. For a spot like Crab Island (Clare), an advanced reef break that’s fairly consistent, it’s a real gut punch. The water temp is about average for this time of year, so at least you won’t be freezing while you’re staring at junk.

The only glimmer of hope comes towards the end of the run. On the morning of Tuesday the 16th of September, things finally look like they might line up. We’ve got a 7 ft swell from the WSW with a period of 8 seconds, but the big news is the wind shifting to a light cross-offshore from the southeast. That’s going to clean things right up. The combined energy is 588 (moderate), so it’s not a monster, but it’ll be surfable. The score is a 2, but compared to everything else, that’s a win. Keep in mind the swell direction is WSW, and this break loves it from the west, so it’s a bit off the optimum, but with clean conditions we’ll take it.

Then there’s a potential standout way out on Saturday the 19th of September. The forecast shows a massive 12 ft swell from the west with a 12-second period, and the combined energy is a whopping 3809 (very strong). That’s a lot of water moving. For the afternoon, the wind goes cross-shore from the south, and the report says it’s wind and tide favorable, but the swell is predicted to be too big for this break. At 12 ft, this is strictly for experts only. The period is 12 seconds, so it’s a proper groundswell, and at a reef break like Crab Island, it could be absolutely pumping, but it’s going to be a heavy, dangerous day. Expect crowds, because this spot is often busy when it’s good.

The very last entry, on the morning of Monday the 22nd of September, shows another promising window. We’re looking at a 8 ft swell from the west with a 14-second period, giving us 1950 (strong) combined energy. The wind is a light cross-shore from the north-northwest, only 3 mph, almost glassy. That’s a long-period groundswell, which is a good sign for shape and power, but it can make things a bit fat at a beach break; at a reef like this, it should be fantastic. The score is a 3, the best of the entire forecast. This is the one to circle on the calendar, but it’s over two weeks away, so don’t lock it in yet.

So, to sum it up: the first week and a half is a write-off. The 16th gives us a brief, clean window, but the real prize is the 19th for the brave, and the 22nd for the hopeful. Stay patient.

Rusty.

Short Range Forecast

Moderate rain (total 11mm), heaviest on Mon afternoon. Very mild (max 16°C on Sun night, min 12°C on Mon afternoon). Winds decreasing (strong winds from the NW on Tue morning, light winds from the NW by Wed morning).

Days 4-6 Weather Summary

Moderate rain (total 15mm), heaviest on Sat morning. Very mild (max 17°C on Thu morning, min 13°C on Wed night). Winds decreasing (strong winds from the SSW on Wed night, light winds from the WSW by Fri afternoon).

Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
1
0
0
0
0
0
0
0
2
0
1
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
WSW
13
2.4
WSW
10
2.3
W
9
2.5
W
9
2.5
WNW
10
2
WNW
10
1.3
W
9
1.1
W
8
1.2
WSW
7
1.7
WSW
9
1.9
WSW
10
1.3
WSW
9
1.3
W
8
1.3
W
8
1.3
W
10
1.4
WNW
13
2
W
13
1.4
WNW
13
1.1
WNW
12
0.9
WNW
11
1.4
WSW
5
Wave Graph
Metric surfscale
Energy kJ
1815
1043
899
1148
1219
717
263
157
143
442
631
283
217
223
345
643
1419
623
306
164
106
Wind (km/h)
35
SW
25
WSW
35
W
40
WNW
40
NW
25
NW
10
WNW
25
SW
30
SSW
30
SSW
35
SW
15
W
15
WNW
10
WSW
20
SSE
35
SW
20
WSW
10
SW
20
SW
25
SW
25
S
Wind State
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-off
cross-on
cross-on
cross-on
cross-on
cross-on
cross
High Tide
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
7:14AM4.49m
7:27PM4.56m
Low Tide
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
1:10PM0.13m
1:30AM0.06m
light rain
mod rain
rain showers
rain showers
rain showers
clear
part cloud
part cloud
light rain
rain showers
rain showers
part cloud
cloud
clear
light rain
light rain
cloud
cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:56
6:58
7:00
7:01
7:03
7:05
7:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:13
8:10
8:07
8:06
8:04
8:00
7:59
 mm
2
6
1
1
1
3
2
2
3
5
Temp °C
16
13
14
14
14
14
14
15
15
17
17
16
14
14
16
17
17
16
16
17
16
Feels °C
9
8
7
5
6
7
12
10
10
12
12
14
11
12
11
13
15
16
13
14
12
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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