Surf Forecasts:
Kilcummin Harbour surf forecast from 31 Aug 2026:
- Best quality surf: Friday 4 Sep, 7AM (local time) - 18ft (5.5m), 12s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 10AM (local time) - 18ft (5.5m), 13s period, WNW swell with 10,210 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 7PM (local time) - 5ft (1.6m), 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 7PM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.2m and 7s. 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 5.5m 13s 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 1.3m 6s period and expected on Monday (Aug 31) at 7PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Tue 1st Sep) | 5ft (1.6m) 8s |
| Best Surf | 7AM (Fri 4th Sep) | 18ft (5.5m) 12s |
| Most Powerful | 10AM (Fri 4th Sep) | 18ft (5.5m) 13s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at what’s on offer for the local stretch around Kilcummin Harbour. It’s a reef setup, and it’s fairly consistent, but the next week and a bit is going to test our patience a little.
We’ve got a bit of a slow start. The first few days, from Monday the 31st of August right through to Wednesday the 2nd of September, are a real mixed bag of mediocrity. The swell is hanging around that 3 ft to 6 ft mark, but it’s mostly short period, wind-affected chop, and the wind is all over the shop. Monday morning has a 12 mph cross-shore that’s just messing things up. The combined energy is weak to moderate at best (425), and it’s just not doing the reef any favours. We’re looking at a few days of “maybe if you’re desperate” surf.
Then we get a little flicker of hope on Thursday the 3rd of September. The swell builds to 6 ft in the morning, and then hits 8 ft in the afternoon from the west with a 10-second period. The combined energy jumps right up to 1584, and the wind is a clean cross-offshore. That’s a big step up. The afternoon session is looking like the pick of the first week, with clean lines and some proper push. It’s getting into that intermediate-to-strong territory, so it’s not for the groms, but it’ll be a good one.
Now, Friday the 4th of September is a write-off. A massive 18 ft swell from the WNW with a 13-second period, but it’s getting hammered by a 25 mph cross-shore wind. The combined energy is a wild 10225, but it’s a total mess. It’s going to be a washing machine out there. That sort of power and wind is more of a kitesurfer’s dream than a paddle surfer’s.
The weekend clears up a bit. Saturday the 5th of September has a cleaner 8 ft from the WNW in the morning, with a gentle 9 mph cross-offshore breeze. The combined energy is strong at 1245, and the waves will have some shape. It’s a much better bet than Friday. Sunday the 6th is a drop-off in size, but we get a fresh offshore wind from the SSE, so the 4 ft to 5 ft swell will be groomed and clean. It’s a different kind of day, but a good one for a longboard.
Looking further out, the highlight of the entire forecast is shaping up for Tuesday the 8th of September. We’ve got a solid 8 ft swell from the west, with a 9 to 10-second period, and a clean offshore wind from the south. The combined energy is strong (1180, then 1267 in the afternoon). That’s proper surf. The break handles the size well, and with that offshore wind, it’s going to be hollow and clean. This is the standout session. The only word of caution is that with a clean, strong swell, this spot can get crowded, so you’ll want to be early.
After that, the swell fades fast. Wednesday the 9th is still surfable in the morning, but the wind gets strong again, and by Thursday the 10th, it’s all gone. There’s a big gap from the 10th right through to the 15th of September where the swell is tiny, under 3 ft, and the energy is weak. It’s a flat spell. The last day we see, Tuesday the 15th of September, gets a little bump back up to 4 ft from the west with a 11-second period, and the combined energy is building back to 351. The wind is light, so it’s a sign of life. It’s a long way out, so keep an eye on it, but it’s promising.
So, to sum it up: the best bet is the afternoon of Thursday the 3rd of September, and the absolute standout to circle on your calendar is Tuesday the 8th of September. That’s the one.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Tue night. Very mild (max 18°C on Wed afternoon, min 13°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Thu morning. Very mild (max 17°C on Sat afternoon, min 13°C on Thu night). Winds decreasing (strong winds from the WSW on Thu night, light winds from the SSW by Sat afternoon). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
AM | 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 7 | W 10 | W 6 | W 7 | W 8 | WNW 8 | W 8 | W 8 | W 7 | W 10 | W 10 | W 11 | WNW 13 | WNW 13 | WNW 12 | WNW 10 | WNW 9 | WNW 8 | WSW 8 | WSW 10 | WSW 10 |
Wave Graph | |||||||||||||||||||||
274 | 320 | 127 | 242 | 334 | 212 | 114 | 72 | 279 | 641 | 1470 | 2875 | 10210 | 7048 | 3801 | 1179 | 544 | 322 | 212 | 502 | 544 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | off | off | off | cross-off |
High Tide | 8:17AM3.22m | 8:30PM3.53m | 8:52AM3.16m | 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 | |||||||
Low Tide | 2:10PM0.23m | 2:39AM0.17m | 2:46PM0.33m | 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 | ||||||||
6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | |
— | 8:30 | — | — | 8:29 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:19 | — | — | 8:16 | — | |
mm | — | — | — | — | — | 5 | — | 1 | — | 1 | 2 | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 15 | 16 | 14 | 17 | 17 | 14 | 17 | 18 | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 16 | 17 | 14 | 17 | 19 | 18 |
Feels °C | 10 | 12 | 11 | 13 | 14 | 12 | 14 | 15 | 13 | 12 | 11 | 8 | 6 | 6 | 7 | 12 | 13 | 10 | 12 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | NNW 7 | W 9 | N 7 | N 7 | WNW 8 | W 8 | W 8 | N 8 | N 11 | N 11 | N 10 | N 9 | — | — | WNW 10 | WNW 9 | WNW 8 | WSW 8 | WSW 10 | WSW 10 |
131 | 85 | 74 | 15 | 8 | 212 | 114 | 72 | 47 | 141 | 108 | 47 | 15 | — | — | 1179 | 544 | 322 | 212 | 502 | 544 | |
Swell 2 Height (m) Direction Period (s) | N 6 | — | N 6 | — | W 18 | N 7 | N 8 | N 8 | N 11 | W 18 | W 18 | — | — | — | — | N 7 | N 7 | W 13 | NNW 8 | NNW 8 | W 16 |
20 | — | 20 | — | 6 | 4 | 20 | 31 | 59 | 6 | 6 | — | — | — | — | 66 | 86 | 3 | 45 | 7 | 45 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | N 8 | W 16 | N 12 | W 16 | — | — | — | — | — | — | — | W 14 | — | — | SE 5 | N 8 |
— | — | — | — | — | 6 | 5 | 12 | 5 | — | — | — | — | — | — | — | 4 | — | — | 1 | 1 | |
Wind waves Height (m) Direction Period (s) | WNW 7 | W 10 | W 6 | W 7 | W 8 | SSE 2 | SSE 3 | SW 8 | W 7 | W 10 | W 10 | W 11 | WNW 13 | WNW 13 | WNW 12 | — | — | S 3 | SSE 4 | S 4 | SSE 4 |
274 | 320 | 127 | 242 | 334 | 1 | 3 | 107 | 279 | 641 | 1470 | 2875 | 10210 | 7048 | 3801 | — | — | 5 | 20 | 10 | 15 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 564 | 2 | 2 | 2 | 2 | 0 | 0 | 0 | 2 | 233 | 2 | 546 | 562 | 662 | 233 | 2 | 2 | 0 | 11 | 452 | 505 |
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.











