Surf Forecasts:
Kilcummin Harbour surf forecast from 29 Aug 2026:
- Best quality surf: Friday 4 Sep, 10AM (local time) - 15ft (4.5m), 12s period, WNW swell with cross-shore winds.
- Most powerful swell: Friday 4 Sep, 7PM (local time) - 16ft (5.0m), 12s period, WNW swell with 7,869 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 7AM (local time) - 2ft (0.6m), 10s period with WSW 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 Sunday (Aug 30) at 7AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.5m and 6s. 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 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Monday (Aug 31) at 7PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 30th Aug) | 2ft (0.6m) 10s |
| Best Surf | 10AM (Fri 4th Sep) | 15ft (4.5m) 12s |
| Most Powerful | 7PM (Fri 4th Sep) | 16ft (5.0m) 12s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's have a look at what's coming down the line for Kilcummin Harbour.
Right now, it is pretty flat and quiet. There's a bit of a gap at the start. We've got to wait until Sunday the 30th of August for the first proper swell to show up. And even then, it's not much of a party.
That Sunday morning, the 30th, we get a little pulse of 3ft from the WSW with a period of 10 seconds. The wind goes cross-offshore from the SSE, cleaning things up. The combined energy is still pretty weak at 169, but for a moment there, it's surfable. Hardly a standout, but it's a start. By the afternoon the wind swings onshore and it's over.
Monday the 31st sees the swell bump up to a cleaner 5ft from the WNW. The morning is choppy, but Monday afternoon could be the call for that window. The swell direction is a touch more W, and it's clean with a cross-offshore breeze from the WSW. That combined energy jumps to a moderate 523. It's still not epic, but it's the first decent window of the run.
Wednesday the 2nd of September has a bit of promise. Early morning, the wind goes offshore from the south, and we're looking at 4ft of swell from the north with a 10-second period. The energy is solid at 396, and it's clean. This is the first proper chance for a smooth session.
Then things get weird. By the end of that week and into the next, we start seeing some numbers that look huge. On Friday the 4th of September, the swell is forecast to be 16ft from the WNW with a period of 12 seconds and a combined energy of 7482. That's massive energy. But the wind is howling at 22 mph from the same direction. This spot is a reef, and at that size, with that wind, it's going to be a washing machine and essentially unsurfable, even for the experts. It's too big.
The real standout, the one that makes you want to clear your schedule, is Saturday the 5th of September. Early morning, we have a 10ft NW swell, with a period of 11 seconds. The wind is a magical offshore from the SSE at just 9 mph. The combined energy is 2014, which is strong. This is a long-period groundswell, so it will have power and shape. On a reef setup like this, that is a recipe for some proper, clean, heaving pits. This is the one. Thursday the 4th is too big and messy, so this Saturday morning is your window. It will be for experienced surfers only at that size, but the conditions are set to be excellent.
After that, things drop off. The water temperature is 62°, which is a touch warmer than normal for this time of year, so not too bad for a wetsuit.
Sunday the 6th and beyond fades out, with smaller messy, onshore, and choppy conditions. A couple of days towards the end of the run, like Wednesday the 9th, show a 8ft groundswell from the north with a clean wind, but the energy is a lot weaker and the quality drops off. Nothing else worth the hype.
So, to sum it up: you wait a few days for the first waves, you get a few clean sessions here and there, but that Saturday morning, the 5th of September, is the clear winner for the skilled crew.
Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Sun afternoon. Very mild (max 17°C on Sun morning, min 13°C on Sat night). Winds increasing (calm on Sat night, fresh winds from the NW by Sun night). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Wed morning. Very mild (max 17°C on Wed morning, min 13°C on Mon night). Winds increasing (light winds from the NNW on Tue afternoon, fresh winds from the W by Thu morning). | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | N 5 | N 6 | N 6 | N 6 | N 6 | WSW 10 | WSW 9 | WSW 9 | WNW 10 | W 10 | W 9 | W 8 | WNW 8 | N 10 | N 10 | WSW 7 | W 8 | WNW 10 | WNW 10 | WNW 10 |
Wave Graph | ||||||||||||||||||||
17 | 21 | 26 | 28 | 29 | 131 | 138 | 132 | 473 | 480 | 128 | 286 | 183 | 245 | 319 | 432 | 527 | 1382 | 1640 | 1860 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | off | cross-off | on | cross-on | cross | cross-off | off | cross-on | cross-on | cross-off | off | cross-off | cross-off | cross | cross | cross-off |
High Tide | 6:55PM3.57m | 7:13AM3.15m | 7:25PM3.64m | 7:45AM3.21m | 7:56PM3.62m | 8:17AM3.22m | 8:30PM3.53m | 8:52AM3.16m | 9:06PM3.35m | 9:31AM3.05m | 9:47PM3.11m | 10:16AM2.89m | 10:39PM2.83m | |||||||
Low Tide | 1:06AM0.18m | 1:05PM0.21m | 1:36AM0.10m | 1:36PM0.19m | 2:06AM0.10m | 2:10PM0.23m | 2:39AM0.17m | 2:46PM0.33m | 3:14AM0.32m | 3:26PM0.50m | 3:54AM0.54m | 4:14PM0.72m | ||||||||
— | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — | |
8:38 | — | — | 8:36 | — | — | 8:34 | — | — | 8:30 | — | — | 8:29 | — | — | 8:25 | — | — | 8:23 | — | |
mm | — | — | — | — | 1 | — | 4 | 1 | — | — | — | 1 | — | 3 | 3 | 1 | — | 1 | — | — |
Temp °C | 16 | 15 | 16 | 16 | 15 | 17 | 17 | 14 | 16 | 16 | 15 | 15 | 15 | 13 | 17 | 17 | 15 | 14 | 15 | 14 |
Feels °C | 14 | 14 | 15 | 15 | 15 | 16 | 16 | 12 | 11 | 11 | 11 | 10 | 12 | 11 | 12 | 13 | 10 | 7 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | N 6 | N 6 | N 6 | N 6 | WSW 10 | WSW 9 | WSW 9 | N 7 | NNW 6 | W 9 | W 8 | WNW 8 | W 8 | N 10 | N 9 | N 9 | N 11 | N 11 | N 10 |
10 | 21 | 26 | 28 | 29 | 131 | 138 | 132 | 42 | 34 | 120 | 286 | 183 | 149 | 319 | 169 | 106 | 114 | 82 | 31 | |
Swell 2 Height (m) Direction Period (s) | NNW 8 | NW 6 | NW 7 | NW 7 | NW 6 | N 7 | N 7 | W 11 | — | NNE 7 | NNW 6 | NNW 6 | W 18 | N 10 | W 8 | — | W 16 | W 18 | — | — |
6 | 7 | 9 | 8 | 6 | 34 | 34 | 9 | — | 9 | 14 | 8 | 6 | 245 | 72 | — | 5 | 6 | — | — | |
Swell 3 Height (m) Direction Period (s) | N 8 | WNW 7 | W 7 | W 7 | WSW 10 | NNW 6 | NW 6 | — | — | — | N 6 | N 7 | — | W 17 | W 16 | — | — | — | — | — |
1 | 5 | 4 | 3 | 10 | 4 | 1 | — | — | — | 3 | 1 | — | 6 | 5 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | N 5 | — | — | — | — | SE 3 | — | NW 5 | WNW 10 | W 10 | W 6 | — | N 6 | — | SSE 4 | WSW 7 | W 8 | WNW 10 | WNW 10 | WNW 10 |
17 | — | — | — | — | 3 | — | 65 | 473 | 480 | 128 | — | 31 | — | 29 | 432 | 527 | 1382 | 1640 | 1860 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 488 | 112 | 112 | 112 | 155 | 0 | 10 | 235 | 416 | 2 | 0 | 513 | 235 | 0 | 0 | 551 | 283 | 1174 | 730 | 283 |
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.











