Surf Forecasts:
Kilcummin Harbour surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 4AM (local time) - 4.5ft (1.4m), 12s period, NW swell with offshore winds.
- Most powerful swell: Saturday 29 Aug, 7AM (local time) - 8ft (2.5m), 7s period, NW swell with 641 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 1AM (local time) - 4ft (1.2m), 11s period with NW 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 Monday (Aug 24) at 1AM. The primary swell is predicted to be 1.2m and 11s period with a secondary swell of 0.2m and 9s. 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 2.5m 7s and forecast to arrive on Saturday (Aug 29) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Wednesday (Aug 26) at 10AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 24th Aug) | 4ft (1.2m) 11s |
| Best Surf | 4AM (Mon 24th Aug) | 4.5ft (1.4m) 12s |
| Most Powerful | 7AM (Sat 29th Aug) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, Rusty here, let's talk about what Kilcummin Harbour is doing.
It's a slow start. Sunday the 23rd has nothing going on – tiny 1ft waves and barely any energy, so don't bother. The real highlight is Monday the 24th. We've got a solid 5ft swell coming from the WNW with an 11-second period, giving the waves some proper shape and power. The combined energy is 606, so there's plenty of punch. The wind is light and cross-offshore, keeping the surface clean. This is your best session by a long shot. The water is about 61°, which is a touch warmer than usual for the time of year.
Tuesday the 25th drops to around 3-4ft and the energy falls off. It's still clean in the morning but more marginal. From Wednesday the 26th through the end of August, it's pretty flat and messy. There's a small window on Sunday the 30th with 4ft waves and offshore wind in the morning, and the afternoon goes glassy with 4ft waves – worth a look if you're keen, but it's not firing.
Into September, Thursday the 3rd afternoon has a decent 4-5ft swell with clean conditions and a light cross-offshore breeze. That's another solid option. But Friday the 4th is a write-off with 25-30 mph winds.
The second week is inconsistent. There are some pulses of swell, but the wind is always messy. Saturday the 6th has 5ft waves but with gale-force wind, and Sunday the 7th is similar with bigger swell but strong cross-shore winds. It's not good for paddling, and with this setup, it might be more interesting for kite surfing than a traditional surf.
The standout is Monday the 24th of August – best swell, best wind, best energy. Sunday the 30th and Thursday the 3rd are worth a look if you're around, but don't expect magic.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Tue night. Warm (max 20°C on Mon afternoon, min 11°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Wed morning. Very mild (max 19°C on Wed afternoon, min 15°C on Wed morning). Winds increasing (light winds from the N on Thu night, fresh winds from the WNW by Fri afternoon). | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 9 | NW 7 | NW 11 | WNW 11 | W 10 | W 10 | W 10 | W 9 | W 8 | W 8 | WSW 8 | WNW 10 | WNW 9 | W 9 | W 8 | NNW 5 | NW 7 | NW 7 | NW 7 | WNW 7 | NW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 15 | 22 | 319 | 597 | 573 | 477 | 216 | 127 | 64 | 28 | 22 | 157 | 141 | 78 | 33 | 52 | 398 | 479 | 585 | 282 | 126 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross |
High Tide | 3:46PM2.51m | 4:16AM2.35m | 4:40PM2.74m | 5:01AM2.54m | 5:20PM3.00m | 5:37AM2.73m | 5:53PM3.23m | 6:10AM2.90m | 6:24PM3.43m | 6:42AM3.05m | 6:55PM3.57m | 7:13AM3.15m | 7:25PM3.64m | ||||||||
Low Tide | 10:12PM1.13m | 10:15AM1.04m | 10:58PM0.92m | 10:56AM0.81m | 11:34PM0.70m | 11:31AM0.60m | 00:07AM0.49m | 12:03PM0.42m | 00:37AM0.31m | 12:34PM0.29m | 1:06AM0.18m | 1:05PM0.21m | 1:36AM0.10m | ||||||||
 |  |  | | |  | |  |  |  |  |  | | |  |  | | | | | | |
 | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — |
 | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:36 | — |
mm | — | — | — | — | — | — | — | 1 | 11 | 6 | 2 | — | — | 1 | 1 | — | 1 | — | 1 | — | — |
Temp °C | 15 | 17 | 17 | 17 | 20 | 18 | 19 | 20 | 17 | 17 | 19 | 17 | 17 | 17 | 16 | 16 | 15 | 15 | 15 | 16 | 15 |
Feels °C | 14 | 15 | 15 | 14 | 17 | 16 | 15 | 17 | 16 | 15 | 19 | 16 | 16 | 16 | 16 | 12 | 11 | 10 | 10 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | NW 6 | NW 7 | NW 11 | WNW 11 | W 10 | W 10 | W 10 | W 9 | W 8 | NE 5 | NE 5 | WNW 10 | WNW 9 | W 9 | W 8 | — | — | — | — | N 7 | NW 6 |
| kJ | 8 | 22 | 319 | 597 | 573 | 477 | 216 | 127 | 64 | 18 | 13 | 157 | 141 | 78 | 33 | — | — | — | — | 87 | 126 |
Swell 2 Height (m) Direction Period (s) | WNW 9 | WNW 8 | WSW 9 | WSW 9 | NE 8 | — | — | NW 8 | NW 8 | W 8 | WSW 8 | NE 5 | NNE 7 | NNE 5 | N 4 | — | — | — | — | — | N 7 |
| kJ | 15 | 13 | 8 | 8 | 2 | — | — | 11 | 14 | 28 | 19 | 3 | 11 | 5 | 4 | — | — | — | — | — | 34 |
Swell 3 Height (m) Direction Period (s) | NNW 7 | WSW 8 | N 8 | N 8 | W 14 | — | — | — | — | NW 8 | WNW 10 | NNW 10 | N 9 | NW 6 | NNW 8 | — | — | — | — | — | — |
| kJ | 9 | 7 | 5 | 1 | 4 | — | — | — | — | 10 | 22 | 10 | 2 | 2 | 6 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | SE 3 | — | E 3 | E 3 | E 3 | ENE 3 | ESE 4 | ESE 3 | — | — | — | — | NNW 5 | NW 7 | NW 7 | NW 7 | WNW 7 | — |
| kJ | — | — | — | 2 | — | 1 | 5 | 2 | 1 | 11 | 2 | — | — | — | — | 52 | 398 | 479 | 585 | 282 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 116 | 52 | 0 | 0 | 0 | 10 | 10 | 10 | 11 | 226 | 11 | 0 | 10 | 37 | 235 | 269 | 269 | 487 | 451 | 531 | 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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