Kilcummin Harbour Surf Break

Lat Long: 54.28° N 9.22° W

Kilcummin Harbour Surf Forecast and Surf Report

Issued: 12 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kilcummin Harbour sea temperature is
16.7° C
1.5° 

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


Kilcummin Harbour surf forecast from 18 Aug 2026:

  • Best quality surf: Monday 24 Aug, 4PM (local time) - 8ft (2.4m), 11s period, W swell with offshore winds.
  • Most powerful swell: Tuesday 18 Aug, 10PM (local time) - 10ft (3.0m), 11s period, WNW swell with 1,812 kJ wave energy.
  • Next surfable swell (1★+): Monday 24 Aug, 10AM (local time) - 2.5ft (0.8m), 11s period with WNW swell.

Best Forecast Surf Conditions for Kilcummin Harbour this week:

The surf forecast for Kilcummin Harbour over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 10AM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 1.0m and 8s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Kilcummin Harbour in the next 16 days are 3.0m 11s and forecast to arrive on Tuesday (Aug 18) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 25) at 7AM.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+)10AM (Mon 24th Aug)2.5ft (0.8m) 11s
Best Surf 4PM (Mon 24th Aug)8ft (2.4m) 11s
Most Powerful10PM (Tue 18th Aug)10ft (3.0m) 11s

Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.


The Lowdown

G’day, Rusty here.

Well, it’s a bit of a slow burner for the next week and a bit, but there’s some serious muscle showing up on the horizon if you’re patient. The first real window of opportunity doesn’t even pop up until Monday the 24th, and even then, it’s a building thing. Before that, we’re staring at a pretty flat and messy run of days, with nothing worth paddling out for.

We’ve got a solid spell of onshore and cross-shore winds keeping things chopped up and messy right through the weekend. The swell is small and weak, with periods struggling to get past 8 seconds. The combined energy is weak, sitting in the low hundreds or even under 100 (like 70 and 46 on Saturday). It’s a classic case of waiting it out. The water temp is about average for this time of year, no real surprises there.

Then Monday the 24th rolls around and things start to get interesting. The morning has some clean conditions with a light offshore, but it’s still only showing 3 ft. The real spark is that afternoon. The wind swings offshore and it’s clean, with a building 8 ft swell from the west at 11 seconds. The energy jumps right up into that moderate range (1318). That’s your first genuine standout, and it’s looking like the best call for a week that’s been mostly dead. Kilcummin Harbour (Kilcummin-Harbour) is the spot here.

Things get messy again for a few days after that, with onshore winds and chop messing up a small swell. We’re back to waiting. There’s a brief window on Thursday the 27th afternoon with a clean 5 ft west-northwest swell and light cross-offshore wind, but it’s not quite the same quality as Monday. It’s surfable, but nothing special.

Now, for the long range, there’s something to keep an eye on. Saturday the 29th of August has a big pulse of 15 ft predicted, but that’s way too much size for this break – that’s expert-only territory and it’s flagged as too big. The following day, Sunday the 30th, still has the clean offshore conditions with a more manageable 8 ft west-northwest swell. That afternoon looks tasty for experienced surfers, with strong moderate energy (1077). Then Monday the 31st keeps that clean offshore flow with a solid 7 ft west-southwest swell, looking very good.

So, the one to circle on the calendar for the second week is that Sunday the 30th, with Monday the 31st as a solid backup. The first week has just the one standout on Monday the 24th. Beyond that, it’s about picking the clean windows when they come.

Stay stoked.

Rusty

Short Range Forecast

Light rain (total 5mm), mostly falling on Tue night. Very mild (max 16°C on Mon night, min 13°C on Tue night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Sun morning. Very mild (max 16°C on Sun afternoon, min 13°C on Thu night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
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
2
3
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
2
4
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
W
8
2.5
W
10
3
WNW
11
3
WNW
10
2.5
W
10
2.3
WNW
10
2.5
N
8
2.1
N
8
1.6
N
7
1.6
N
6
1.4
N
6
1
N
6
0.8
NNW
5
0.6
NNW
5
0.6
NW
5
0.7
NW
5
0.7
NW
8
0.7
NW
7
0.8
WNW
11
2.4
W
11
1.7
W
10
Wave Graph
Metric surfscale
Energy kJ
501
1199
1685
1470
1249
1004
970
527
260
206
148
62
35
19
16
28
57
44
140
1317
561
Wind (km/h)
25
W
25
WSW
20
WSW
25
W
25
W
15
NNW
35
N
30
N
25
N
25
N
30
N
15
N
15
N
25
N
15
WNW
20
W
20
WNW
10
S
20
SSE
25
S
35
SSE
Wind State
cross
cross-off
cross-off
cross
cross
on
on
on
on
on
on
on
on
on
cross-on
cross
cross-on
off
off
off
cross-off
High Tide
10:06AM2.89m
10:23PM2.94m
10:47AM2.70m
11:07PM2.61m
11:38AM2.50m
00:05AM2.33m
12:49PM2.36m
1:31AM2.17m
2:25PM2.35m
3:09AM2.20m
3:46PM2.51m
4:16AM2.35m
4:40PM2.74m
Low Tide
3:59PM0.66m
4:28AM0.76m
4:45PM0.93m
5:11AM1.02m
5:44PM1.18m
6:11AM1.24m
7:15PM1.34m
7:46AM1.33m
9:03PM1.31m
9:17AM1.23m
10:12PM1.13m
10:15AM1.04m
10:58PM0.92m
cloud
cloud
rain showers
rain showers
clear
rain showers
cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
rain showers
rain showers
part cloud
cloud
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:20
6:22
6:24
6:26
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:01
9:00
8:57
8:54
8:52
8:50
8:47
 mm
1
1
3
2
1
3
Temp °C
16
16
14
16
16
14
14
14
13
13
13
14
15
14
14
15
16
14
16
18
16
Feels °C
11
11
10
11
11
12
7
8
7
7
7
11
12
10
11
12
13
14
11
13
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 Kilcummin Harbour Surf forecast

The above surf forecast table for Kilcummin Harbour provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kilcummin Harbour can be found by selecting the local surf guide option on the grey menu. Our Kilcummin Harbour 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 (Kilcummin Harbour) 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 Kilcummin Harbour 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.

Kilcummin Harbour is 19 km (12 miles) from Ballina. If you plan a holiday in Mayo and Achill Island, look for hotels and other accommodation in Ballina. Ballina has rooms for a wide range of budgets as well as car hire and transport links.

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