Kilcummin Harbour Surf Break

Lat Long: 54.28° N 9.22° W

Kilcummin Harbour Surf Forecast and Surf Report

Issued: 12 pm 06 Sep 2026 (local time)

Forecast update in  hr  min

Today's Kilcummin Harbour sea temperature is
16.3°C
1.6° 

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 6 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 10AM (local time) - 6ft (1.8m), 10s period, N swell with cross-offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 7PM (local time) - 15ft (4.5m), 11s period, NW swell with 4,414 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 10AM (local time) - 6ft (1.8m), 10s 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 Wednesday (Sep 09) at 10AM. The primary swell is predicted to be 1.8m and 10s period with a secondary swell of 1.5m and 8s. 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 4.5m 11s and forecast to arrive on Tuesday (Sep 08) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Sunday (Sep 13) at 4AM.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+)10AM (Wed 9th Sep)6ft (1.8m) 10s
Best Surf10AM (Wed 9th Sep)6ft (1.8m) 10s
Most Powerful 7PM (Tue 8th Sep)15ft (4.5m) 11s

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


The Lowdown

Alright buddy, let’s talk about Kilcummin Harbour in proper units. This is a reef set-up, sheltered, facing north-northwest. The water’s sitting at 61° – that’s a touch warmer than usual for this time of year. Not bad.

The forecast starts with Sunday morning – 4ft of west swell, 8-second period, weak energy (200). South wind howling at 35 km/h but offshore, so it’s clean but barely surfable. Sunday afternoon bumps to 7ft from west-southwest, 10-second period, energy at 899 – that’s moderate. Light rain and cross-offshore wind, but still marked as marginal.

Monday the 7th is where it gets real. Morning has 8ft from the west, 9-second period, moderate cross-offshore wind from the southwest at 25 km/h. Energy is 1465 – strong. Clean. Monday afternoon pushes to 10ft, west, 10 seconds, energy hits 1812 – very strong wave energy. Still clean, but that’s expert-only size.

Tuesday the 8th is a mess. Strong onshore winds, rain, 13ft plus of cross-shore junk. Energy over 4000 but it’s all chop and wind. That’s kite-surfing conditions, not paddle surfing.

Wednesday the 9th morning is the first standout. Clear skies, gentle west-southwest breeze at 15 km/h, cross-off. Swell drops to a clean 6ft from the north, 10-second period. Energy 1068 – moderate to strong. Rated excellent for experienced surfers. Clean, solid, no chaos. Thursday through Friday is smaller and cleaner but more marginal – 6ft west swell with moderate energy (503-583). Friday afternoon goes glassy – light breezes – with 6ft west-northwest swell at 8 seconds. Clean but weak.

Saturday the 12th brings another big pulse. Morning has 40 km/h cross-shore winds and 8ft west-northwest swell at 12 seconds, energy 1422 – strong but messy. Afternoon eases to a moderate cross-off breeze, swell at 8ft with a 13-second period, energy 1939. Cleaner but still big and marginal.

Sunday the 13th morning is the absolute standout of the second week. Moderate offshore from the south at 20 km/h, 8ft of west-northwest swell at 12 seconds. Energy 1647. Conditions are excellent for experienced surfers. The reef will handle that long-period groundswell beautifully. After that, Monday the 14th through Wednesday the 16th is mostly messy – fresh cross-shore winds, dropping swell, energy down from 1821 to under 200.

Thursday the 17th morning shows a glimmer – cross-off breeze from the southeast at 20 km/h, 8ft west swell, 10 seconds, energy 1229 – clean. But afternoon turns to strong cross-shore wind and 10ft of messy swell. Friday and Saturday the 18th and 19th are write-offs: strong breeze, rain, cross and cross-on winds.

Sunday the 20th afternoon brings a final clean session. Offshore from the south at 20 km/h, 4ft of west-northwest swell, 10-second period, energy 501. Tagged as “expect very good surf conditions”. Perfect for a longer board, glassy offshore texture. Nice finish.

Top calls? Wednesday morning the 9th – clean, 6ft north swell – and Sunday morning the 13th – big 8ft, clean, offshore, expert-only but excellent. The rest is mostly a mixed bag.

That’s the picture from here.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Sun morning. Very mild (max 19°C on Sun morning, min 13°C on Mon night). Winds decreasing (strong winds from the WNW on Tue afternoon, light winds from the WNW by Tue night).

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Fri night. Very mild (max 18°C on Fri night, min 13°C on Wed morning). Mainly strong winds.

Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
2
2
3
0
0
0
4
2
1
2
1
1
1
2
1
0
3
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
W
8
2.1
WSW
10
1.8
W
10
2.5
W
9
3
W
10
3.5
W
11
4
WNW
10
4.5
NW
11
4
NW
10
1.8
N
10
1.4
N
9
1.4
W
8
1.7
W
9
1.7
WSW
10
1.9
W
9
1.8
W
8
1.7
WNW
8
1
WNW
13
2.3
WNW
12
2.4
WNW
13
2.2
WNW
13
Wave Graph
Metric surfscale
Energy kJ
169
884
693
1016
1810
2726
3370
4153
2818
602
318
216
486
574
588
461
412
357
1422
1939
1524
Wind (km/h)
35
S
30
SSW
25
SW
25
SW
35
WSW
30
WSW
40
WNW
40
WNW
30
NW
15
WSW
25
SW
30
S
20
SSW
30
SW
15
W
10
W
10
SSW
35
S
40
W
20
WSW
15
SSE
Wind State
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
cross-on
cross-off
cross-off
off
cross-off
cross-off
cross
cross
cross-off
off
cross
cross-off
off
High Tide
2:14PM2.67m
3:05AM2.49m
3:35PM2.94m
4:17AM2.71m
4:35PM3.27m
5:09AM2.95m
5:23PM3.57m
5:53AM3.15m
6:06PM3.78m
6:32AM3.30m
6:44PM3.86m
7:09AM3.38m
7:21PM3.82m
Low Tide
8:50PM0.96m
9:09AM0.97m
10:06PM0.67m
10:12AM0.71m
11:00PM0.36m
11:01AM0.45m
11:44PM0.11m
11:44AM0.24m
00:22AM-0.05m
12:23PM0.09m
00:58AM-0.11m
1:00PM0.04m
1:31AM-0.07m
light rain
light rain
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rain showers
cloud
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rain showers
rain showers
part cloud
part cloud
part cloud
rain showers
cloud
cloud
part cloud
part cloud
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light rain
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:54
6:56
6:56
6:58
7:01
7:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:16
8:14
8:12
8:08
8:07
8:04
8:01
 mm
1
1
1
2
1
1
3
Temp °C
19
18
15
15
15
13
14
14
13
15
15
15
16
17
15
15
16
18
16
16
16
Feels °C
15
14
12
8
8
7
6
6
6
10
10
13
13
13
12
12
14
13
12
12
14
  • 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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