Surf Forecasts:
Kilcummin Harbour surf forecast from 26 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 1AM (local time) - 7ft (2.1m), 8s period, W swell with offshore winds.
- Most powerful swell: Tuesday 1 Sep, 4AM (local time) - 7ft (2.1m), 8s period, W swell with 617 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 1AM (local time) - 4.5ft (1.4m), 7s period with NNW 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 1AM. The primary swell is predicted to be 1.4m and 7s period with a secondary swell of 0.7m and 11s. 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 2.1m 8s and forecast to arrive on Tuesday (Sep 01) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Monday (Aug 31) at 7AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 30th Aug) | 4.5ft (1.4m) 7s |
| Best Surf | 1AM (Tue 1st Sep) | 7ft (2.1m) 8s |
| Most Powerful | 4AM (Tue 1st Sep) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, let's break down the surf around Kilcummin Harbour. The first few days, from Wednesday the 26th through Saturday the 29th of August, are pretty much a total loss. We're talking small, weak, and messy swell with no decent wind. The wave energy is pitiful, barely registering. Don't even think about paddling out.
Finally, on Sunday the 30th of August, we get a window. The morning is glassy, with a light WSW breeze, and a clean 1.3m swell from the NNW. The period is 8 seconds, and the combined energy is a moderate 292. It's a small, clean wave, perfect for a longboard or a funboard. The water temp is about what you'd expect for this time of year.
The next real standout, and it's a big one, is Thursday the 3rd of September. The morning brings a solid 3.0m swell from the WSW with a 10-second period. The combined energy is a massive 1727 – that's strong. The wind is clean offshore from the SSW. This is a powerful, expert-only wave. The afternoon sees it drop to 1.9m, still clean.
After that, we get a few days of big, choppy, wind-affected swell. Then, on Sunday the 6th of September, we get a clean morning with 0.8m swell from the west and a 9-second period, with a moderate offshore wind. The energy is 211 (moderate). A nice, clean, smaller option.
Then comes a monster. Monday the 7th of September morning is showing a massive 4.5m swell from the NW with a 10-second period. The combined energy hits 4132 – that's very strong. The wind is a strong cross-offshore, but it's blowing a near-gale at 30 mph. That's not a surf session; that's a survival situation. The setup looks more interesting for kite surfing than paddle surfing. The afternoon is a bit smaller at 4.0m with an 11-second period, but still a gale.
The final nice spot is Wednesday the 9th of September. A clean 1.6m from the west with an 8-second period, and a gentle offshore wind from the south. Energy is 441 (moderate). A solid, clean, everyday wave.
So, the best clean session is Sunday the 30th of August. The big, expert-only standout is the morning of Thursday the 3rd of September. And keep an eye on Wednesday the 9th of September for a clean, solid wave.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Tue night. Very mild (max 17°C on Wed morning, min 15°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Fri night. Very mild (max 17°C on Sun afternoon, min 12°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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) | W 8 | W 7 | WNW 10 | WNW 9 | WNW 9 | W 8 | WNW 7 | WNW 7 | N 5 | N 6 | N 6 | NNW 7 | NNW 8 | NNW 8 | N 8 | W 10 | W 9 | W 8 | W 8 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 29 | 27 | 150 | 135 | 80 | 33 | 18 | 18 | 19 | 62 | 69 | 180 | 204 | 186 | 120 | 158 | 327 | 583 | 351 | 311 | 196 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-off | glassy | cross | cross | cross | cross | off | cross-off | off | cross-off |
High Tide | 5:37AM2.73m | 5:53PM3.23m | 6:10AM2.90m | 6:24PM3.43m | 6:42AM3.05m | 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 | |||||||
Low Tide | 11:31AM0.60m | 00:07AM0.49m | 12:03PM0.42m | 00:37AM0.31m | 12:34PM0.29m | 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 | |||||||
 | |  | |  |  |  |  |  |  |  | | | | | | |  | | | | |
 | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — |
 | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:36 | — | — | 8:34 | — | — | 8:30 | — | — | 8:29 | — |
mm | — | — | — | — | — | 1 | 1 | — | 7 | 7 | 5 | — | — | — | 1 | 1 | — | 1 | — | 1 | 1 |
Temp °C | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 16 | 17 | 14 | 15 | 16 | 16 | 18 | 18 | 17 |
Feels °C | 15 | 16 | 17 | 16 | 16 | 16 | 15 | 15 | 15 | 11 | 9 | 10 | 14 | 14 | 8 | 9 | 11 | 13 | 13 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 7 | WNW 10 | WNW 9 | WNW 9 | W 8 | WNW 7 | NNW 4 | N 5 | W 7 | W 7 | WSW 11 | NNW 8 | W 9 | N 8 | W 10 | N 7 | N 7 | W 8 | W 8 | W 8 |
| kJ | 29 | 27 | 150 | 135 | 80 | 33 | 18 | 12 | 19 | 4 | 1 | 117 | 204 | 56 | 120 | 158 | 39 | 9 | 351 | 311 | 196 |
Swell 2 Height (m) Direction Period (s) | NW 7 | WNW 11 | NE 4 | NNE 4 | NNE 5 | N 9 | NW 8 | WNW 7 | NW 6 | NW 7 | W 10 | — | WSW 9 | W 12 | W 8 | N 7 | N 11 | — | NNW 6 | NNW 6 | N 6 |
| kJ | 8 | 23 | 4 | 2 | 5 | 1 | 3 | 18 | 6 | 2 | 2 | — | 88 | 11 | 51 | 69 | 2 | — | 48 | 18 | 15 |
Swell 3 Height (m) Direction Period (s) | W 12 | NW 7 | — | NNE 5 | NW 12 | NW 10 | N 8 | NNW 8 | WNW 7 | W 11 | W 8 | — | — | W 12 | W 11 | — | — | — | N 8 | N 6 | N 8 |
| kJ | 3 | 2 | — | 3 | 5 | 4 | 1 | 7 | 9 | 2 | 1 | — | — | 11 | 37 | — | — | — | 5 | 10 | 5 |
Wind waves Height (m) Direction Period (s) | ENE 4 | ENE 4 | E 3 | — | N 5 | N 4 | N 4 | — | — | N 6 | N 6 | NNW 7 | — | NNW 8 | WNW 5 | W 5 | W 9 | W 8 | — | — | — |
| kJ | 7 | 11 | 1 | — | 4 | 15 | 18 | — | — | 62 | 69 | 180 | — | 186 | 44 | 67 | 327 | 583 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 66 | 52 | 10 | 37 | 55 | 394 | 269 | 235 | 166 | 151 | 259 | 0 | 0 | 131 | 171 | 289 | 233 | 0 | 2 | 171 | 2 |
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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