Crab Island Surf Break

Lat Long: 53.04° N 9.39° W

Crab Island Surf Forecast and Surf Report

Issued: 6 pm 24 Aug 2026 (local time)

Forecast update in  hr  min

Today's Crab Island sea temperature is
17.2°C
1.6° 

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 25 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 4AM (local time) - 3.5ft (1.1m), 10s period, W swell with cross-offshore winds.
  • Most powerful swell: Tuesday 25 Aug, 4AM (local time) - 3.5ft (1.1m), 10s period, W swell with 233 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 4AM (local time) - 3.5ft (1.1m), 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 Tuesday (Aug 25) at 4AM. The primary swell is predicted to be 1.1m and 10s 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 1.1m 10s and forecast to arrive on Tuesday (Aug 25) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Tue 25th Aug)3.5ft (1.1m) 10s
Best Surf 4AM (Tue 25th Aug)3.5ft (1.1m) 10s
Most Powerful 4AM (Tue 25th Aug)3.5ft (1.1m) 10s

Table - best surf conditions forecast for Crab Island over the next 16 days.


The Lowdown

Alright, let’s get into it. The next couple of weeks are a mixed bag, but there’s some serious potential if you’re willing to wait it out. The main event is definitely a long way off, but there’s a window of clean, smaller surf right at the start that’s worth grabbing if you can.

The first real opportunity is Monday afternoon at Crab Island. It’s a reef break, so it’s got that structure to it. We’ve got a clean 3ft of west swell with an 11-second period. The wind is a light cross-offshore breeze, so the face is going to be nice. Water temp is sitting at 63°, which is a touch warmer than usual for this time of year, so it’s not going to be a shock. This is the pick of the early week, no doubt. The energy is moderate at 245, and it’s got that clean, glassy feel. It’s not huge, but it’s clean and the reef will make the most of it.

Tuesday morning stays rideable, with a similar 3ft west swell, but the period drops a touch to 10 seconds. The wind is more direct offshore, which is a positive, but the energy is a bit weaker at 181. It’s surfable, but nothing to write home about. The afternoon drops off a bit more to 3ft, but the wind goes glassy. It’s small, but if you’ve got a log, you might find a few.

After that, we hit a dry spell. Wednesday through the weekend and into early next week is looking pretty ordinary. The swell drops right off and the wind is all over the shop, mostly onshore or cross-onshore. There’s a day on Thursday where the swell bumps up to 4ft, but it’s a short-period wind swell with a cross-onshore breeze, so it’s going to be messy. Then it gets worse. The weekend is a write-off with fresh to strong cross-onshore winds and a dropping swell. This is the kind of stretch where you might be better off sorting out your gear than getting in the water. The long-range models are showing some life, but this blank run looks like it’s going to last a good five or six days.

Now, here’s where things get interesting. On Wednesday, September 2nd, the swell really kicks in. We’re looking at a solid 12ft of west swell, but the note says it’s predicted to be too big for Crab Island. The energy is strong, coming in at 1736, but for a reef break, that size is going to be shutting it down. This is expert territory, and even then, it might be a closeout. The wind is cross-on, which isn’t helping either.

The following Thursday and Friday keep that big energy, with the swell bouncing between 5ft and a massive 12ft. The wind is onshore, so the quality is going to be poor. Honestly, this stretch looks more like a kite-surfing session than a paddle-surfing one, especially with that size and wind combo.

But then we get to the real standout. Saturday, September 5th, early morning. The swell is still huge at 10ft, but the wind goes glassy. The note is again that it’s too big for the break, but that glassy surface on a 3-meter west swell with an 11-second period is something else. The energy is massive at 2476. This is for the brave only, and probably not even for them at Crab Island. It’s a spectacle, but not a surfable option for most.

The following Monday, September 7th, is the one that could be truly special. We’ve got a colossal 30ft west swell with a very long 18-second period. This is a serious, once-in-a-while groundswell. The energy reading is off the charts at 48854. The wind is light cross-on, but with that size and period, it’s going to be absolute chaos. This is a day for watching, not paddling, unless you’re a big-wave charger with a jet ski. The period is so long that it might just break straight and close out completely.

After that monster, it settles down a bit. Tuesday, September 8th, sees the swell drop to a still-chunky 8ft with an 11-second period, but the wind is cross-on, making it messy.

So, to sum it up: the cleanest, most accessible surf is Monday afternoon, August 24th. It’s small but clean. The big swells later in the window are for experts only, and even then, the quality looks questionable with the onshore winds. The real, true standout for its sheer power and promise is that Monday, September 7th event, but it’s a promise of chaos, not clean waves. Keep your eyes on the forecast, because that one could be something to see.

Rusty

Short Range Forecast

Light rain (total 3mm), mostly falling on Tue afternoon. Warm (max 21°C on Mon afternoon, min 14°C on Tue morning). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 22mm), heaviest during Thu night. Very mild (max 17°C on Thu afternoon, min 13°C on Sat night). Winds increasing (light winds from the W on Thu afternoon, fresh winds from the SW by Sun morning).

Mon
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
1
1
1
0
0
1
0
1
0
0
0
0
0
0
0
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)
1
W
11
1.1
W
10
1
W
10
0.8
W
9
0.7
W
8
0.5
W
8
0.5
W
7
0.7
W
10
0.7
W
9
0.6
WNW
9
0.9
WNW
8
1.3
WNW
7
1.3
WNW
7
0.8
WNW
7
0.5
WNW
7
0.5
WNW
3
0.4
NW
4
0.6
WSW
8
0.8
W
10
0.9
W
9
Wave Graph
Metric surfscale
Energy kJ
229
239
181
101
64
29
26
88
81
62
103
142
138
50
25
5
3
49
117
136
Wind (km/h)
10
ENE
10
E
15
E
5
NE
15
ENE
5
ENE
5
N
10
ENE
20
NE
10
ENE
10
WNW
20
NW
25
WNW
10
SW
20
SW
25
SW
25
WSW
30
SSW
30
SW
35
WNW
Wind State
cross-off
off
off
glassy
off
glassy
cross
cross-off
cross-off
cross-off
on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
High Tide
4:31AM3.39m
4:41PM3.75m
5:09AM3.65m
5:17PM4.02m
5:42AM3.89m
5:50PM4.25m
6:14AM4.08m
6:22PM4.40m
6:46AM4.22m
6:54PM4.48m
7:17AM4.30m
7:26PM4.48m
Low Tide
10:24PM1.12m
10:33AM1.16m
11:00PM0.82m
11:07AM0.89m
11:32PM0.53m
11:39AM0.65m
00:02AM0.30m
12:10PM0.46m
00:32AM0.14m
12:40PM0.34m
1:01AM0.06m
1:12PM0.29m
1:32AM0.07m
cloud
part cloud
cloud
light rain
light rain
part cloud
clear
clear
light rain
mod rain
rain showers
cloud
cloud
rain showers
cloud
cloud
rain showers
thunderstorm
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:35
6:37
6:39
6:41
6:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:45
8:43
8:40
8:38
8:37
8:34
8:31
 mm
1
1
1
6
8
1
5
2
2
3
Temp °C
21
19
15
16
15
16
18
17
18
17
16
16
16
15
16
17
16
15
16
15
Feels °C
18
17
13
15
15
16
18
15
17
17
16
13
13
13
13
13
12
10
11
11
  • 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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