Kilcummin Harbour Surf Break

Lat Long: 54.28° N 9.22° W

Kilcummin Harbour Surf Forecast and Surf Report

Issued: 6 pm 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Kilcummin Harbour sea temperature is
16.5°C
1.7° 

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 3 Sep 2026:

  • Best quality surf: Friday 4 Sep, 7AM (local time) - 16ft (5.0m), 12s period, W swell with cross-offshore winds.
  • Most powerful swell: Friday 4 Sep, 10AM (local time) - 16ft (5.0m), 13s period, WNW swell with 8,049 kJ wave energy.
  • Next surfable swell (1★+): Thursday 3 Sep, 7AM (local time) - 3.5ft (1.0m), 11s period with N 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 Thursday (Sep 03) at 7AM. The primary swell is predicted to be 1.5m and 7s period with a secondary swell of 1.0m and 11s. Another secondary swell of 0.1m and 18s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Kilcummin Harbour in the next 16 days are 5.0m 13s and forecast to arrive on Friday (Sep 04) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Sep 06) at 7AM.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Thu 3rd Sep)3.5ft (1.0m) 11s
Best Surf 7AM (Fri 4th Sep)16ft (5.0m) 12s
Most Powerful10AM (Fri 4th Sep)16ft (5.0m) 13s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s coming our way at Kilcummin Harbour.

Overall, the pattern is a bit of a mixed bag. We’ve got a solid pulse of energy building through the end of the first week, but a lot of it is going to be too big or blown out for this place. The real sweet spot looks to be the early mornings around the 5th and the 10th. There’s a notable gap in quality surf towards the end of the second week, with a lot of onshore crud.

We kick off on Wednesday the 2nd with a small 2ft W swell at 7 seconds, weak energy (113). It’s cross-off wind and the water is sitting at 62°, which is a touch warmer than normal for this time of year. The surf is just too small and weak to get excited about.

Thursday the 3rd sees a jump in size, with 5ft to 7ft W swell, but the period is short (8 seconds) and the wind is cross-off from the SW, gusting 18 mph. The conditions are messy and marginal. Not one to get out of bed for.

Friday the 4th is where it gets serious. The early morning has a massive 16ft WNW swell, with a long 13-second period. The combined energy is a huge 8064, which is very strong. The wind is cross-off, but the problem is the swell is just too big for this break. The report flat out says it’s too big. This is expert-only territory, and even then, it’s going to be a battle. The afternoon drops to 13ft but the wind goes cross, making it a total mess.

Saturday the 5th is the standout. The morning is your best bet. We’ve got a clean 7ft WNW swell, with a 10-second period, and the wind is offshore from the S at 9 mph. The combined energy is a solid 1033, giving you moderate wave energy. The report says "excellent surf conditions for experienced surfers". This is the one. Expect a few others out there though, as crowds are sometimes a factor here.

Sunday the 6th the swell drops right back to 3ft to 4ft from the WSW. The wind is offshore in the morning, but it’s a fresh 18 mph, so it’s a bit much for the small waves. The afternoon is better, with a clean 4ft wave and a moderate offshore breeze. It’s small, but rideable.

Monday the 7th is a write-off. The swell jumps to 8ft, but the wind is a cross-off gale at 21 mph, then 25 mph. The surf is poor and messy.

Tuesday the 8th is even worse. A 15ft WNW swell with a strong cross-shore wind. This is a full-on, lumpy, choppy mess. Not for paddle surfing.

Wednesday the 9th offers a bit of hope. The morning has a 8ft WNW swell, clean with a gentle breeze (9 mph). It’s marginal. The afternoon is better, with a 7ft W swell and a clean offshore breeze from the S at 12 mph. The report says "expect very good surf conditions". This is a solid option.

Thursday the 10th is another standout. The morning is absolutely glassy. No wind, just a slight air, with a clean 7ft W swell at 10 seconds. The combined energy is 870. This will be the cleanest, most user-friendly wave of the whole run. The afternoon gets a bit choppy as the wind picks up onshore.

Friday the 11th through to Saturday the 13th sees a return to small, clean waves in the 3ft to 7ft range, with light winds. It’s good for a fun session, but nothing to travel for.

Sunday the 13th things get heavy again. A 13ft WNW groundswell with a 15-second period arrives, but the wind is cross-on to cross, making it choppy and messy. The long period will make it break straight at this beach setup, so it’s not ideal.

Monday the 14th and Tuesday the 15th are a write-off with onshore winds and lumpy conditions. The swell is still 8ft to 8ft, but it’s blown out.

Wednesday the 16th drops to a tiny 3ft, with a strong onshore wind. Don’t bother.

The 17th brings a 7ft W swell, but with a strong cross-shore wind of 25 mph, it’s a kite-surfing day, not a paddle-surfing day.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Thu afternoon. Very mild (max 18°C on Wed afternoon, min 13°C on Thu night). Winds decreasing (strong winds from the WSW on Thu night, light winds from the SW by Fri night).

Days 5-7 Weather Summary

Moderate rain (total 13mm), heaviest on Sat afternoon. Very mild (max 19°C on Sun afternoon, min 12°C on Sat afternoon). Winds increasing (light winds from the W on Sun night, strong winds from the WSW by Mon afternoon).

Wed
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
2
1
2
!
0
5
4
2
1
0
2
0
0
1
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
W
7
1.1
N
11
1.5
W
8
2.2
WSW
8
3
W
10
5
WNW
13
4
WNW
12
3.5
WNW
12
2.2
WNW
10
1.7
WNW
9
1
WSW
8
1
WSW
9
1.1
WSW
10
1.4
WSW
9
2.5
W
8
4
WSW
10
4
WNW
10
4.5
WNW
10
4
WNW
10
3.5
WNW
10
Wave Graph
Metric surfscale
Energy kJ
54
274
289
660
2216
8049
5521
3021
954
506
147
169
240
340
994
2699
3198
3712
3513
2616
Wind (km/h)
20
SW
25
WSW
20
SW
30
SW
35
WSW
40
WSW
35
W
15
WSW
15
S
25
SE
25
SSE
30
SSE
25
S
20
W
35
SW
40
WSW
35
W
40
WNW
35
W
25
W
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
off
cross-off
off
off
off
cross
cross-off
cross-off
cross
cross
cross
cross
High Tide
9:47PM3.11m
10:16AM2.89m
10:39PM2.83m
11:14AM2.71m
11:49PM2.56m
12:36PM2.60m
1:27AM2.41m
2:14PM2.67m
3:05AM2.49m
3:35PM2.94m
4:17AM2.71m
4:35PM3.27m
Low Tide
3:54AM0.54m
4:14PM0.72m
4:44AM0.79m
5:20PM0.95m
5:55AM1.03m
6:59PM1.08m
7:36AM1.11m
8:50PM0.96m
9:09AM0.97m
10:06PM0.67m
10:12AM0.71m
11:00PM0.36m
light rain
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light rain
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clear
part cloud
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light rain
part cloud
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rain showers
rain showers
thunderstorm
rain showers
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part cloud
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:47
6:48
6:50
6:52
6:54
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:25
8:23
8:22
8:19
8:16
8:14
8:12
 mm
1
4
2
2
2
2
3
2
Temp °C
18
16
17
15
14
15
15
14
15
13
16
17
19
14
14
14
13
14
14
14
Feels °C
16
12
12
11
9
8
8
11
12
8
13
12
17
10
7
5
6
6
6
9
  • Map Icons:
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  • 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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