Surf Forecasts:
Kilcummin Harbour surf forecast from 18 Aug 2026:
- Best quality surf: Monday 24 Aug, 7PM (local time) - 7.5ft (2.3m), 10s period, W swell with offshore winds.
- Most powerful swell: Wednesday 19 Aug, 1AM (local time) - 8ft (2.5m), 11s period, WNW swell with 1,456 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 4AM (local time) - 2.5ft (0.8m), 6s 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 Monday (Aug 24) at 4AM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.3m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Kilcummin Harbour in the next 16 days are 2.5m 11s and forecast to arrive on Wednesday (Aug 19) 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 0.9m 4s period and expected on Tuesday (Aug 25) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Mon 24th Aug) | 2.5ft (0.8m) 6s |
| Best Surf | 7PM (Mon 24th Aug) | 7.5ft (2.3m) 10s |
| Most Powerful | 1AM (Wed 19th Aug) | 8ft (2.5m) 11s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s cookin’ for Kilcummin Harbour.
First up, the water’s a touch warmer than normal for this time of year at 62°, nothing wild but you’ll notice it if you’re used to a wetsuit.
Alright, to be straight with you, the start of this run is a bit grotty. Tuesday the 18th through Sunday the 23rd, there’s a solid week of poor to marginal conditions. You get a 19 mph cross-off on Tuesday the 18th with 8 ft of west swell, but the wind’s messing it up and the energy is hefty at 1234. Not the kind of day you want to be paddling out for a good time. Wednesday the 19th morning has a bit of hope with 8 ft and clean conditions, but the rain and that cross-off wind keep it average. From Thursday the 20th onwards, it’s a northerly wind event, perfect onshore for this spot, and the swell drops fast. By Saturday the 22nd, you’re looking at knee-high dribble. A real blank patch where I wouldn’t bother waxing up.
Then things change. Monday the 24th is where the magic starts to stir. The wind swings south, blowing offshore with a gentle breeze, and we get a clean 5 ft with a long 11-second period out of the WNW. That’s a proper groundswell, mate. The combined energy hits 589, and this reef setup will love that direction. The morning is the pick – gentle offshore wind, clean lines. It’s not huge, but the quality will be there. Tuesday the 25th still has good energy with a moderate offshore, though the swell settles a bit. Keep Monday the 24th as the standout in this stretch; solid, clean, and the period is nice.
The second week looks more up and down. Wednesday the 26th brings another 6 ft WNW swell with that long 11-second period and a light cross-shore, but it’s marginal on the tide. Not terrible, but not a classic. Thursday the 27th morning gets a gentle offshore and a clean 4 ft swell – a small but fun window if you’ve got a log. After that, things get wind-affected again. The 29th and 30th of August see strong cross-shore and cross-off winds with fresh breezes up to 22 mph, and the swell gets lumpy and choppy.
The real endgame is Monday the 31st of August afternoon and into September the 2nd. On Monday the 31st afternoon, we get a moderate offshore with a 4 ft swell out of the NNW, period of 10 seconds, and the energy jumps to 634. That’s a clean, solid offering. Then Wednesday the 2nd of September morning is promising too – light offshore wind, 6 ft of WSW swell, and very clean conditions. If I had to pick a second standout, that Wednesday morning is the one. But overall, the best of the whole outlook is Monday the 24th of August.
This Kilcummin Harbour spot is a reef break, and with that consistent but not always reliable nature, you gotta time it. It’s fairly consistent, so it tends not to stay poor for long, and this forecast backs that up. Crowds are possible there sometimes, but with it being a bit inconsistent in quality, it’s usually not a circus.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Tue night. Very mild (max 16°C on Tue afternoon, min 13°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Fri afternoon. Very mild (max 17°C on Mon morning, min 12°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | ||||||||||||||||||||
Wave Height (m) Direction Period (s) | W 10 | WNW 11 | W 10 | WNW 10 | WNW 10 | N 8 | N 8 | N 7 | N 7 | N 6 | NNW 6 | WNW 6 | NNW 5 | NW 6 | NW 6 | WNW 8 | WNW 6 | WNW 11 | W 10 | W 10 |
Wave Graph | ||||||||||||||||||||
1224 | 1456 | 1199 | 959 | 904 | 970 | 541 | 302 | 173 | 130 | 67 | 28 | 37 | 44 | 40 | 49 | 54 | 586 | 936 | 683 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | on | on | on | on | on | cross | cross | cross-on | off | off | off | off |
High Tide | 10:23PM2.94m | 10:47AM2.70m | 11:07PM2.61m | 11:38AM2.50m | 00:05AM2.33m | 12:49PM2.36m | 1:31AM2.17m | 2:25PM2.35m | 3:09AM2.20m | 3:46PM2.51m | 4:16AM2.35m | 4:40PM2.74m | ||||||||
Low Tide | 4:28AM0.76m | 4:45PM0.93m | 5:11AM1.02m | 5:44PM1.18m | 6:11AM1.24m | 7:15PM1.34m | 7:46AM1.33m | 9:03PM1.31m | 9:17AM1.23m | 10:12PM1.13m | 10:15AM1.04m | 10:58PM0.92m | ||||||||
— | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | |
— | 9:01 | — | — | 9:00 | — | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | |
mm | — | 1 | 2 | 2 | 3 | — | — | 1 | 1 | 1 | — | — | — | — | 1 | 1 | — | — | — | — |
Temp °C | 16 | 14 | 16 | 16 | 14 | 14 | 14 | 13 | 14 | 14 | 14 | 15 | 14 | 14 | 16 | 15 | 14 | 17 | 18 | 15 |
Feels °C | 11 | 11 | 12 | 11 | 11 | 7 | 7 | 7 | 8 | 9 | 9 | 11 | 10 | 12 | 14 | 13 | 14 | 13 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | N 7 | N 7 | N 8 | WNW 10 | WNW 10 | W 10 | WNW 9 | WNW 8 | WNW 8 | WNW 7 | WSW 8 | N 5 | WNW 6 | NW 6 | NW 6 | WNW 8 | WNW 6 | WNW 11 | W 10 | W 10 |
4 | 4 | 1 | 959 | 904 | 273 | 216 | 101 | 71 | 11 | 14 | 28 | 12 | 44 | 40 | 49 | 54 | 586 | 936 | 683 | |
Swell 2 Height (m) Direction Period (s) | W 18 | — | W 17 | N 8 | — | — | W 15 | W 15 | WSW 9 | WSW 9 | NNE 9 | WSW 9 | WSW 9 | WSW 9 | WNW 9 | NNW 6 | WSW 9 | N 8 | N 8 | — |
6 | — | 6 | 1 | — | — | 4 | 4 | 8 | 15 | 15 | 16 | 15 | 16 | 15 | 31 | 15 | 1 | 1 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 17 | — | — | — | — | W 17 | W 16 | WNW 7 | NNE 9 | NNE 9 | NNE 9 | WSW 9 | WSW 8 | NW 11 | W 9 | — | — |
— | — | — | 6 | — | — | — | — | 6 | 5 | 5 | 16 | 16 | 16 | 15 | 7 | 4 | 2 | — | — | |
Wind waves Height (m) Direction Period (s) | W 10 | WNW 11 | W 10 | — | NNW 11 | N 8 | N 8 | N 7 | N 7 | N 6 | NNW 6 | WNW 6 | NNW 5 | — | — | — | — | S 3 | S 4 | S 4 |
1224 | 1456 | 1199 | — | 39 | 970 | 541 | 302 | 173 | 130 | 67 | 25 | 37 | — | — | — | — | 8 | 18 | 18 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 233 | 2 | 132 | 171 | 242 | 244 | 272 | 437 | 297 | 297 | 151 | 151 | 244 | 2 | 2 | 244 | 2 | 0 | 0 | 0 |
Best forecast wave conditions in Mayo and Achill Island | ||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||
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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.











