
Surf Forecasts:
Kilcummin Harbour surf forecast from 6 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 4PM (local time) - 5ft (1.5m), 8s period, WNW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 10AM (local time) - 15ft (4.5m), 11s period, WNW swell with 4,950 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 4PM (local time) - 5ft (1.5m), 8s 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 Wednesday (Sep 09) at 4PM. The primary swell is predicted to be 1.5m and 8s period with a secondary swell of 1.2m 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 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 1.1m 4s period and expected on Sunday (Sep 06) at 1PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Wed 9th Sep) | 5ft (1.5m) 8s |
| Best Surf | 4PM (Wed 9th Sep) | 5ft (1.5m) 8s |
| Most Powerful | 10AM (Tue 8th Sep) | 15ft (4.5m) 11s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's chew the fat on what's brewing.
First off, the water is 62°, which is a touch warmer than usual for this time of year – a nice little bonus for the session.
We're looking at a bit of a mixed bag to start with. The first solid call is for Saturday afternoon, September 5th. Kilcummin Harbour is seeing a clean 6ft swell from the WNW with a period of 10 seconds. The wind is a gentle offshore from the SSE, making for some tidy conditions. The combined swell energy is sitting at a solid 707 (moderate wave energy), and while the crowd can be there sometimes, it'll be worth it. This is a decent opener.
The weekend has a bit of a downer. Sunday morning on the 6th is a write-off with a fresh onshore breeze ruining things, but Sunday afternoon sees a spike to 7ft from the WSW with a moderate cross-off breeze. The energy jumps to 894 (moderate), but the quality is marginal. Monday the 7th is much the same story: a building 8ft to 10ft from the W, but strong cross-off winds keep it from being truly clean. The energy is ramping up (1213 and then 1816 – strong), but the conditions are keeping the quality down.
Then we hit a proper wall. Tuesday the 8th is a full-on mess. We’ve got a raw 15ft from the WNW, with a combined energy of 4950 (very strong). That's serious size, but it’s blowing a strong cross-shore and cross-onshore gale. The quality is poor, and this is strictly for experts only – and even then, only if you’re keen on a beatdown. Honestly, with that wind and size, this setup looks more interesting for kite surfing than paddle surfing.
Things settle down a bit by Wednesday morning the 9th with a cross-shore 6ft, but it’s not until Wednesday afternoon that we get a proper clean window: 5ft from the WNW with a gentle cross-off wind and a combined energy of 514 (moderate). That’s a nice, clean little session.
Thursday the 10th and Friday the 11th are a bit average, with clean but small conditions on Thursday, and then a messy cross-shore on Friday spoiling a 7ft swell.
Now, the standout. While the second week has some fun windows, the absolute best on offer is Sunday, September 14th. Monday morning the 14th. We’ve got a pumping 10ft groundswell from the WNW with a very long period of 12 seconds. The combined energy is 2730 (very strong). And the wind? It’s a gentle offshore from the SW. This is big, powerful, and clean. This is for experienced surfers only. But for the right crew, it’s the call of the fortnight.
The run after that holds some promise. The mornings of September 17th and 18th are looking excellent. Thursday the 17th has a strong 12ft WNW swell with glassy conditions and a combined energy of 2980 (very strong). That is a serious, clean groundswell for experts. Friday the 18th stays clean with a 8ft to 8ft W swell, and that run continues through the weekend with clean offshore winds and 7ft+ swell from the WNW through to the 20th. The Thursday and Friday of the second week are the real highlights if you can time it right.
So to sum it up: the first week is patchy with a huge, windy storm in the middle, but the second week, particularly around the 14th and then the 17th and 18th, is where the magic is. The long-range stuff is promising but keep an eye on it.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Mon morning. Very mild (max 19°C on Sun morning, min 13°C on Mon morning). Winds increasing (light winds from the SSE on Sat afternoon, strong winds from the WNW by Tue morning). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Tue afternoon. Very mild (max 17°C on Thu afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the WNW on Tue afternoon, light winds from the SW by Wed afternoon). | |||||||||||||||||||
Sat 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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) | WNW 10 | W 9 | W 8 | WSW 10 | W 10 | W 10 | W 10 | W 11 | WNW 11 | NW 11 | NW 10 | WNW 9 | WNW 8 | WNW 7 | W 8 | WSW 10 | W 9 | W 8 | WNW 9 | WNW 10 |
Wave Graph | ||||||||||||||||||||
637 | 225 | 169 | 886 | 770 | 1209 | 1814 | 2945 | 4950 | 4441 | 2604 | 525 | 306 | 164 | 247 | 445 | 417 | 496 | 662 | 717 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-off | off | off | cross-off | cross-off | cross | cross-on | cross |
High Tide | 1:27AM2.41m | 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 | ||||||||
Low Tide | 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 | 11:44AM0.24m | 00:22AM-0.05m | 12:23PM0.09m | 00:58AM-0.11m | |||||||
— | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 7:01 | — | — | |
8:19 | — | — | 8:16 | — | — | 8:14 | — | — | 8:12 | — | — | 8:08 | — | — | 8:07 | — | — | 8:04 | — | |
mm | — | — | — | 2 | — | 5 | — | — | 1 | 1 | 1 | — | — | — | — | 1 | 2 | 1 | — | — |
Temp °C | 15 | 18 | 19 | 19 | 14 | 14 | 15 | 13 | 13 | 14 | 13 | 15 | 15 | 13 | 15 | 17 | 16 | 14 | 14 | 13 |
Feels °C | 12 | 15 | 15 | 15 | 11 | 8 | 8 | 6 | 5 | 6 | 6 | 12 | 11 | 10 | 11 | 14 | 13 | 8 | 7 | 9 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | W 9 | W 8 | NNW 8 | W 15 | W 10 | N 9 | NW 13 | — | NNW 12 | — | WNW 9 | WNW 8 | WNW 7 | W 8 | N 7 | N 7 | — | — | WNW 10 |
637 | 225 | 169 | 6 | 221 | 1209 | 2 | 330 | — | 267 | — | 525 | 306 | 164 | 247 | 9 | 3 | — | — | 717 | |
Swell 2 Height (m) Direction Period (s) | N 7 | NNW 8 | NNW 8 | SE 5 | NW 8 | N 9 | — | — | — | — | — | N 9 | N 8 | N 8 | N 8 | N 7 | — | — | — | — |
70 | 76 | 23 | 3 | 2 | 2 | — | — | — | — | — | 495 | 205 | 104 | 28 | 9 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | W 13 | NNW 9 | N 10 | N 10 | N 10 | — | — | — | — | — | — | W 13 | W 12 | SE 4 | NW 7 | — | — | — | — |
— | 3 | 8 | 2 | 2 | 2 | — | — | — | — | — | — | 3 | 11 | 4 | 2 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SSE 4 | SSE 4 | WSW 10 | W 10 | — | W 10 | W 11 | WNW 11 | NW 11 | NW 10 | — | — | S 3 | S 4 | WSW 10 | W 9 | W 8 | WNW 9 | — |
— | 19 | 38 | 886 | 770 | — | 1814 | 2945 | 4950 | 4441 | 2604 | — | — | 2 | 2 | 445 | 417 | 496 | 662 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 484 | 562 | 2 | 209 | 716 | 283 | 730 | 730 | 584 | 233 | 0 | 0 | 0 | 2 | 2 | 610 | 730 | 2 |
Best forecast wave conditions in Mayo and Achill Island | ||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










