Kilcummin Harbour Surf Break

Lat Long: 54.28° N 9.22° W

Kilcummin Harbour Surf Forecast and Surf Report

Issued: 6 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Kilcummin Harbour sea temperature is
15.7°C
1.4° 

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 12 Sep 2026:

  • Best quality surf: Thursday 17 Sep, 4PM (local time) - 15ft (4.5m), 13s period, WNW swell with cross-shore winds.
  • Most powerful swell: Thursday 17 Sep, 7PM (local time) - 15ft (4.5m), 13s period, WNW swell with 7,327 kJ wave energy.
  • Next surfable swell (1★+): Saturday 12 Sep, 10PM (local time) - 7ft (2.2m), 12s 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 Saturday (Sep 12) at 10PM. The primary swell is predicted to be 2.2m and 12s period with a secondary swell of 1.2m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Kilcummin Harbour in the next 16 days are 4.5m 13s and forecast to arrive on Thursday (Sep 17) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Sep 14) at 10AM.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Sat 12th Sep)7ft (2.2m) 12s
Best Surf 4PM (Thu 17th Sep)15ft (4.5m) 13s
Most Powerful 7PM (Thu 17th Sep)15ft (4.5m) 13s

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


The Lowdown

Alright, Rusty here, and let’s talk about what’s on the cards for Kilcummin Harbour.

The pattern for this stretch is a big one – we’ve got a significant run of solid, thumping swell on the radar, but it’s a mixed bag for quality. The water’s hanging in at 60°F, which is a touch warmer than normal for this time of year, so you might get away with a thinner suit for a bit longer.

We start with a build over the first weekend. Saturday the 12th is a write-off with a messy 10ft west swell and a strong cross-off wind. Not worth paddling out. Sunday the 13th looks a bit better, with the wind turning offshore early and the swell dropping to a clean 5ft from the northwest – a nice window for a few fun ones if you pick your tides.

Monday the 14th morning sees a small 3ft southwest swell with a moderate offshore wind, so the reef will be clean but gutless. Not a stand-out.

Now, the week from Thursday the 17th through the following weekend gets serious, but it’s a challenge. A massive pulse of groundswell hits. By Thursday the 17th morning, we’re looking at a huge 13ft to 15ft west-northwest swell with periods over 12 seconds. The energy readings are massive, but here’s the thing – the break is simply too small for this kind of size. It’s too big for this break. For expert chargers only, and even then, the wind is cross or cross-onshore, making it lumpy and chaotic. Friday the 18th is still pushing 12ft with cleaner conditions but still massive for a reef setup.

The best genuine window I’m seeing is a Monday the 21st morning. The swell has dropped slightly to a still-chunky 10ft from the west-northwest, but the wind goes glassy-light from the southeast, giving you a clean, cross-off bump. The conditions are excellent for experienced surfers. That’s the one to circle. Get out there early.

The very end of the run, Saturday the 26th morning, is another promising blip. An 8ft groundswell from the northwest with a very long 15-second period is forecast, with a gentle offshore wind. That’s a classic reef setup at Kilcummin Harbour with clean lines. It’s over a week away, so keep an eye on the forecast, but that’s the standout on the horizon. After that, it gets too big and windy again.

Expect big crowds to be possible at this spot when the wind lines up, and given the size of this swell run, the lineup will be busy with those looking for a big wave fix.

Rusty out.

Short Range Forecast

Some drizzle, heaviest during Mon night. Warm (max 20°C on Sun afternoon, min 13°C on Sat night). Winds decreasing (fresh winds from the WSW on Sat morning, calm by Sat night).

Days 4-6 Weather Summary

Some drizzle, heaviest during Wed night. Very mild (max 15°C on Tue morning, min 12°C on Tue night). Mainly fresh winds.

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
AM
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
4
3
2
2
2
1
2
1
0
0
2
1
1
0
!
!
4
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
W
12
3
WNW
12
2
WNW
12
1.6
NW
11
1.3
WNW
10
0.9
WNW
9
0.8
WSW
8
1.8
W
10
1.7
W
10
1.8
W
10
2.2
WNW
10
3
WNW
11
2.4
WNW
10
2.3
WNW
10
3
WNW
9
4
WNW
11
4.5
WNW
13
4.5
WNW
13
3.5
WNW
13
3.5
WNW
12
3.5
WNW
11
Wave Graph
Metric surfscale
Energy kJ
2557
2455
1100
561
320
141
87
720
601
640
923
2039
1108
920
1361
3851
6399
6492
4112
3055
2872
Wind (km/h)
30
WSW
15
WNW
0
N
10
SSE
15
SSW
20
SSW
25
SSW
30
SSW
20
SW
20
W
30
NW
25
NW
20
WNW
30
WSW
25
W
35
W
30
W
30
W
25
WSW
30
SW
25
SSW
Wind State
cross-off
cross-on
glassy
off
cross-off
off
off
cross-off
cross-off
cross
cross-on
cross-on
cross
cross-off
cross
cross
cross
cross
cross-off
cross-off
cross-off
High Tide
7:21PM3.82m
7:43AM3.38m
7:56PM3.66m
8:16AM3.32m
8:31PM3.42m
8:49AM3.19m
9:05PM3.12m
9:23AM3.01m
9:40PM2.80m
9:59AM2.79m
10:20PM2.49m
10:45AM2.56m
11:14PM2.22m
Low Tide
1:00PM0.04m
1:31AM-0.07m
1:36PM0.07m
2:03AM0.06m
2:11PM0.19m
2:33AM0.27m
2:47PM0.39m
3:04AM0.51m
3:24PM0.63m
3:36AM0.78m
4:04PM0.91m
4:14AM1.04m
4:57PM1.19m
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
rain showers
clear
clear
part cloud
cloud
part cloud
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:03
7:05
7:05
7:07
7:09
7:11
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:01
7:59
7:57
7:53
7:52
7:49
7:46
 mm
1
1
1
Temp °C
17
15
14
17
20
16
19
17
14
15
14
13
14
15
15
14
14
13
16
15
14
Feels °C
12
13
14
15
18
14
15
12
12
10
8
7
10
9
10
7
8
8
10
9
10
  • 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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