Surf Forecasts:
Kilcummin Harbour surf forecast from 1 Sep 2026:
- Best quality surf: Friday 4 Sep, 7AM (local time) - 15ft (4.5m), 12s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 4PM (local time) - 16ft (5.0m), 13s period, WNW swell with 7,328 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 10PM (local time) - 5ft (1.5m), 8s period with W 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 Tuesday (Sep 01) at 10PM. The primary swell is predicted to be 1.5m and 8s period with a secondary swell of 0.2m and 6s. 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 5.0m 13s and forecast to arrive on Friday (Sep 04) at 4PM. 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 10AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 1st Sep) | 5ft (1.5m) 8s |
| Best Surf | 7AM (Fri 4th Sep) | 15ft (4.5m) 12s |
| Most Powerful | 4PM (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 break down what’s happening at Kilcummin Harbour over the next couple of weeks.
First thing, the first few days are a total washout. There’s some swell, but the wind is all over the place and we’ve got rain, so it’s a no-go. The water is sitting at 62°F, which is a little warmer than usual for this time of year, so the water ain’t bad.
Our first real chance at a decent session comes on Monday the 7th of September. By the afternoon, the wind shifts to a cross-off from the WSW, and we’ve got a solid 8ft swell from the West with a 9-second period. The combined energy is 1140 (moderate wave energy), and it’s finally clean. This is a reef break, so the tide is going to be a big factor, but the setup is there for a good session.
Now, the real standout is Monday the 14th of September. This is the one you want to wait for. Monday afternoon, we’ve got offshore winds from the SSE, which is absolute gold for this spot. The swell is a heavy 13ft from the WNW with an 11-second period. That’s a big, powerful groundswell with a combined energy of 3635 (strong wave energy). This is for experts only – the reef will handle that long period swell perfectly, giving you some serious, hollow waves. It’s a rare spot, so when it fires, it’s a special thing.
The rest of the second week offers smaller, cleaner windows. Tuesday the 15th has a 7ft swell from the West with gentle offshore winds, and the 16th of September has a 6ft swell from the West with light winds, both clean. But the real magic is that Monday the 14th.
So, the first week is a bit of a dud, but the second week has some serious potential, especially that Monday. Keep an eye on it, because that one could be a real gem.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Thu afternoon. Very mild (max 18°C on Wed afternoon, min 13°C on Thu night). Winds increasing (light winds from the S on Tue night, strong winds from the W by Fri morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Sun night. Very mild (max 19°C on Sun afternoon, min 12°C on Sat night). Winds decreasing (fresh winds from the W on Fri afternoon, light winds from the WSW by Sun night). | |||||||||||||||||||
Tue 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | ||||||||||||||
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 8 | W 8 | W 8 | W 7 | N 11 | N 11 | WSW 8 | W 11 | WNW 12 | WNW 13 | WNW 12 | WNW 10 | WNW 10 | WNW 9 | WSW 9 | WSW 11 | W 14 | WSW 11 | W 10 | W 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 383 | 212 | 93 | 70 | 269 | 220 | 484 | 2276 | 6644 | 7328 | 3496 | 1450 | 838 | 307 | 166 | 1412 | 2736 | 2130 | 2018 | 1958 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | off | off | off | off | cross | cross-off | off | off |
High Tide | 9:06PM3.35m | 9:31AM3.05m | 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 | ||||||||
Low Tide | 3:14AM0.32m | 3:26PM0.50m | 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 | ||||||||
 |  | |  |  |  |  |  |  | | | | | | | | | | | | |
 | — | — | 6:45 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — |
 | 8:29 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:19 | — | — | 8:16 | — | — | 8:14 | — |
mm | 2 | 1 | 4 | — | 1 | — | 6 | — | — | — | — | — | — | — | — | — | 1 | — | — | 9 |
Temp °C | 16 | 15 | 16 | 18 | 17 | 18 | 14 | 14 | 15 | 15 | 14 | 16 | 15 | 15 | 18 | 19 | 16 | 16 | 17 | 14 |
Feels °C | 14 | 14 | 15 | 14 | 14 | 13 | 9 | 9 | 7 | 8 | 9 | 11 | 12 | 11 | 14 | 15 | 12 | 13 | 13 | 8 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 8 | W 7 | N 11 | W 8 | N 10 | N 10 | N 9 | N 9 | — | WNW 10 | WNW 10 | WNW 9 | WSW 9 | W 19 | W 14 | N 10 | — | — |
| kJ | 383 | 212 | 93 | 70 | 269 | 212 | 168 | 46 | 15 | 6 | — | 1450 | 838 | 307 | 166 | 7 | 496 | 2 | — | — |
Swell 2 Height (m) Direction Period (s) | N 6 | N 8 | NW 6 | N 8 | W 16 | N 11 | W 17 | — | — | — | — | — | N 9 | N 8 | WNW 9 | — | — | — | — | — |
| kJ | 3 | 6 | 9 | 51 | 5 | 220 | 6 | — | — | — | — | — | 14 | 29 | 43 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 18 | N 6 | N 8 | NW 6 | — | W 15 | — | — | — | — | — | — | — | W 13 | N 7 | — | — | — | — | — |
| kJ | 6 | 3 | 12 | 10 | — | 4 | — | — | — | — | — | — | — | 3 | 4 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | ESE 3 | SW 3 | W 7 | SSW 3 | WSW 8 | W 11 | WNW 12 | WNW 13 | WNW 12 | — | — | SSE 4 | SSE 4 | WSW 11 | W 14 | WSW 11 | W 10 | W 10 |
| kJ | — | — | 4 | 6 | 192 | 6 | 484 | 2276 | 6644 | 7328 | 3496 | — | — | 13 | 54 | 1412 | 2736 | 2130 | 2018 | 1958 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2 | 2 | 0 | 10 | 2 | 2 | 131 | 2 | 194 | 283 | 351 | 233 | 2 | 2 | 10 | 11 | 145 | 2 | 55 | 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.
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