Kilcummin Harbour Surf Break

Lat Long: 54.28° N 9.22° W

Kilcummin Harbour Surf Forecast and Surf Report

Issued: 6 am 03 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, WNW swell with cross-offshore winds.
  • Most powerful swell: Friday 4 Sep, 10AM (local time) - 16ft (5.0m), 12s period, WNW swell with 7,971 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 7AM (local time) - 16ft (5.0m), 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 Friday (Sep 04) at 7AM. The primary swell is predicted to be 5.0m and 12s period with a secondary swell of 0.4m and 9s. 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 12s and forecast to arrive on Friday (Sep 04) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Sunday (Sep 06) at 7AM.

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

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


The Lowdown

Alright folks, Rusty here. Let’s have a proper look at what’s coming our way for Kilcummin Harbour over the next couple of weeks. It’s a bit of a mixed bag, so we’ll take it step by step.

We start off on Thursday, the 3rd of September, with some rideable but not spectacular surf. The morning shows 5 feet from the west, with a period of 8 seconds – that’s a short-period wind swell, so the energy is a bit weak. The wind is a cross-off from the southwest, which is okay for keeping things clean, but it’s not going to blow you away. The water temp is sitting at 62°, which is a touch warmer than normal for this time of year – feels like a little gift from the sea. By the afternoon, the swell picks up to 7 feet from the WSW, still short period, but the wind picks up too, making things feel a bit messy.

Friday the 4th is one to skip. The swell jumps to 16 feet and 15 feet from the WNW with a 12-second period, so there’s serious energy here, but the wind is howling straight cross-shore, creating horrible lumpy, cross-chop. That’s not surfable; that’s a washing machine. For the vast majority of us, it’s a no-go. Unless you’re a tow-in expert, sit this one out.

Things settle down a little for Saturday the 5th. The morning sees 8 feet from the WNW, period 10 seconds, with a gentle cross-off from the SSW. It’s clean, but the energy is moderate. The real highlight of the day is Saturday afternoon: 7 feet from the WNW, period 9 seconds, and the wind swings to a clean offshore from the south at 15 mph. That’s your best bet for the weekend. It’s not huge, but the offshore wind will hold the waves up nicely. It could get a little busy, as this spot can see a crowd sometimes.

Sunday the 6th drops off quickly. Swell drops below 5 feet, and while the wind stays offshore, it’s a fresh breeze, making it a bit more work for the paddle. Not the best.

We then hit a rough patch. From Monday the 7th right through to Tuesday the 8th, and into Wednesday the 9th morning, conditions are poor. Onshore winds, lumpy seas, and messy swell. There’s a brief moment of calm on Wednesday afternoon the 9th – the wind goes glassy (NE, 3 mph), and the swell is a tiny 4 feet from the west, 7 seconds. It’s a quiet, clean session for a log or a mini-mal, but no real power behind it.

Thursday the 10th sees a return of some hope. The morning brings 6 feet from the west with an 11-second period, a nice groundswell, cross-off winds from the SSE. Energy is moderate. The afternoon is cleaner still with a moderate offshore from the south at 12 mph, offering 5 feet from the west. That’s a solid, clean afternoon session.

Friday the 11th is a write-off – messy cross-shore winds and weak swell.

Now, we’re looking further ahead. Saturday the 12th of September brings a bump in size again: 8 feet from the WNW with an 11-second period in the morning, and 8 feet in the afternoon. The energy is strong, but the wind is a problem – strong cross-shore in the morning, and onshore in the afternoon. Not ideal.

Sunday the 13th and Monday the 14th are poor with onshore and cross-onshore winds. Not worth the drive.

Now, the real standout in the whole forecast is Tuesday the 15th of September. The morning shows a massive 12 feet swell from the WNW with a very long 16-second period. The energy reading is huge. This is a serious groundswell, deep ocean energy. The wind is light from the north, so it’s clean. The only caveat is that a swell this long can feel a little straight at a beach or exposed reef, but Kilcummin Harbour, being a reef setup, should handle it nicely. This is for experts only – 12 feet is big and powerful. The afternoon holds similar size at 12 feet, 15-second period, though the wind turns cross-onshore from the northwest, so morning is the call. It’s a long way out, so keep an eye on it, but this is the one to circle on the calendar.

After that, Wednesday the 16th drops back to 8 feet, but the wind is cross-shore, making it lumpy. The rest of the week fades into small, weak surf with little energy and tiny waves (2 feet and 2 feet) by Friday the 18th. A long gap of quiet conditions to finish.

Best on offer: Saturday afternoon the 5th for a clean, fun session with offshore wind, and the big one – Tuesday morning the 15th of September – for a powerful, groundswell hit for the experienced crew.

Stay safe, keep your wetsuit zipped, and I’ll see you in the water.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu morning, 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 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Sun afternoon. Warm (max 20°C on Sun afternoon, min 12°C on Mon night). Mainly fresh winds.

Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
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
1
2
0
0
4
3
3
1
1
1
0
1
1
0
0
0
1
0
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
W
8
2.1
WSW
8
3
W
10
5
WNW
12
4.5
WNW
12
3.5
WNW
12
2.5
WNW
10
2
WNW
9
1.1
WSW
8
1.2
WSW
9
1.3
WSW
10
1.9
W
7
2
W
8
1.1
WSW
9
1.8
WNW
9
3
WNW
9
3
WNW
10
2.1
WNW
9
1.4
WNW
8
1.2
W
7
1.4
WSW
8
Wave Graph
Metric surfscale
Energy kJ
291
588
2040
7971
5440
3253
1233
688
160
243
295
328
488
202
477
1229
1361
631
238
159
270
Wind (km/h)
20
SW
30
SW
35
WSW
40
W
35
W
15
WSW
15
SSW
25
S
25
SSE
35
S
30
SSW
25
WSW
35
SW
20
WSW
25
W
30
WNW
35
NW
25
WNW
20
NW
5
NE
15
S
Wind State
cross-off
cross-off
cross-off
cross
cross
cross-off
cross-off
off
cross-off
off
off
cross-off
cross-off
cross-off
cross
cross-on
cross-on
cross
cross-on
glassy
off
High Tide
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
5:09AM2.95m
5:23PM3.57m
Low Tide
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
11:01AM0.45m
11:44PM0.11m
part cloud
light rain
rain showers
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
rain showers
cloud
light rain
light rain
rain showers
rain showers
clear
clear
part cloud
cloud
cloud
<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
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:23
8:22
8:19
8:16
8:14
8:12
8:08
 mm
5
1
1
1
1
1
1
Temp °C
17
15
14
15
15
13
14
15
15
18
20
15
15
14
13
14
14
13
14
15
13
Feels °C
12
11
9
7
8
9
11
10
11
13
16
9
9
10
7
7
7
7
10
14
11
  • 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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