Kilcummin Harbour Surf Break

Lat Long: 54.28° N 9.22° W

Kilcummin Harbour Surf Forecast and Surf Report

Issued: 6 pm 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, 7PM (local time) - 15ft (4.5m), 13s period, WNW swell with cross-shore winds.
  • Most powerful swell: Sunday 20 Sep, 1AM (local time) - 16ft (5.0m), 14s period, WNW swell with 10,754 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 5.0m 14s and forecast to arrive on Sunday (Sep 20) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Sep 14) at 1PM.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Sat 12th Sep)7ft (2.2m) 12s
Best Surf 7PM (Thu 17th Sep)15ft (4.5m) 13s
Most Powerful 1AM (Sun 20th Sep)16ft (5.0m) 14s

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


The Lowdown

Alright, Rusty here. Let's have a look at what's cooking for us over the next couple of weeks.

Right off the bat, the water temp is sitting at 60°, which is a touch warmer than you'd normally expect this time of year, so that's a little bonus.

The story for the next 16 days is mostly about size, and a lot of it. The first real window kicks off on Saturday morning, the 12th of September, at Kilcummin Harbour. We're looking at a solid 12 ft W swell rolling in, with a 12-second period that’s packing serious punch – the energy is up there at 2865. It's clean with a cross-offish wind, but the size is already in that expert-only territory. That afternoon drops to 10 ft, but it goes a bit cross-choppy.

Sunday the 13th morning is a real sweet spot. The swell drops to a much more user-friendly 5 ft from the NW, still a decent 11-second period, and we get light offshore winds from the south. The combined energy is a moderate 715. It's clean and lined up. This is the standout for the first few days. It’s not huge, but it’ll be the best quality for the average surfer. The afternoon hangs in there with 5 ft waves and clean offshores too.

Monday the 14th has a bit of a surge, with 5 ft W swell in the afternoon and moderate offshores from the SSW. Good conditions, but the morning is a bit smaller and rain-soaked.

Tuesday the 15th kicks up to 6 ft but the wind goes cross, and by the afternoon it's a choppy mess with 8 ft and a short 7-second period. Not worth it.

From Wednesday the 16th right through the rest of the week, the swell just starts pumping and won't stop growing. We're talking 8 ft to 13 ft plus, with energy readings going from 1261 all the way up to 4501. The problem is the wind; it’s mostly cross or cross-on with lumpy conditions. By Saturday the 19th, the swell is hitting 15 ft, but the forecast is outright saying it's too big for this break. The same goes for Sunday the 20th (16 ft) and Monday the 21st (18 ft). That Monday morning has a massive energy reading of 10034, but it's a beast only for the brave.

The light at the end of the tunnel is Wednesday the 23rd of September. After all that chaos, the swell eases back to a nice 7 ft from the west, the period is a manageable 9 seconds, and we get fresh offshore winds from the SSE. The energy is a moderate 718. Thursday the 24th stays in that 10 ft range, but with fresh offshores it'll be clean, though the size is pushing it.

So, if you’re a regular surfer, your best bet is Sunday morning, the 13th of September. For the bigger-wave crew, those mid-week days from the 23rd and 24th will be your best shot at clean, powerful waves, just watch that size.

Stay safe out there.

- Rusty

Short Range Forecast

Light rain (total 6mm), mostly falling on Mon morning. Very mild (max 18°C on Sun afternoon, min 12°C on Sat night). Winds increasing (calm on Sat night, fresh winds from the SW by Mon night).

Days 5-7 Weather Summary

Light rain (total 5mm), mostly falling on Wed night. Very mild (max 15°C on Fri morning, min 12°C on Wed night). Mainly fresh winds.

Sat
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
3
2
2
2
1
1
0
0
0
2
2
0
1
2
!
4
2
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
WNW
12
2
WNW
12
1.6
NW
11
1.4
NW
10
1
NW
9
0.8
WSW
8
1.5
W
11
2.1
W
10
1.9
W
10
1.8
WNW
10
3
WNW
12
2.5
WNW
10
2.2
WNW
10
2.5
WNW
8
3
WNW
10
4
WNW
12
4.5
WNW
14
4
WNW
13
3.5
WNW
12
4
WNW
11
Wave Graph
Metric surfscale
Energy kJ
2455
1100
561
348
155
90
524
847
697
627
2243
1479
923
773
1941
4786
8628
5383
3471
3423
Wind (km/h)
15
WNW
5
NW
10
S
15
S
15
S
20
S
25
SSW
30
WSW
25
W
35
NW
30
WNW
20
WNW
20
SW
30
WNW
30
W
30
W
25
W
30
SW
35
SW
30
WSW
Wind State
cross
cross-on
off
off
off
off
cross-off
cross-off
cross
cross-on
cross-on
cross
cross-off
cross
cross
cross
cross-off
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
1:31AM-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
cloud
part cloud
part cloud
cloud
part cloud
light rain
light rain
rain showers
rain showers
clear
rain showers
rain showers
part cloud
rain showers
cloud
part cloud
part cloud
cloud
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
2
1
2
1
1
1
3
1
2
Temp °C
15
14
16
18
16
16
18
15
15
14
13
14
14
14
14
14
13
15
16
14
Feels °C
13
13
15
16
15
14
15
9
9
8
7
9
10
10
7
8
8
8
10
8
  • 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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