Surf Forecasts:
Kilcummin Harbour surf forecast from 21 Aug 2026:
- Best quality surf: Monday 24 Aug, 4AM (local time) - 5.5ft (1.7m), 12s period, NW swell with offshore winds.
- Most powerful swell: Monday 24 Aug, 4AM (local time) - 5.5ft (1.7m), 12s period, NW swell with 808 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 10PM (local time) - 2ft (0.6m), 10s 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 Sunday (Aug 23) at 10PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.8m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kilcummin Harbour in the next 16 days are 1.7m 12s and forecast to arrive on Monday (Aug 24) at 4AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 25) at 10PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 23rd Aug) | 2ft (0.6m) 10s |
| Best Surf | 4AM (Mon 24th Aug) | 5.5ft (1.7m) 12s |
| Most Powerful | 4AM (Mon 24th Aug) | 5.5ft (1.7m) 12s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, Rusty here, lookin’ at the same stretch of water at Kilcummin Harbour.
First few days are a total bust. Friday the 21st and Saturday the 22nd of August are blown out and flat. Not worth wetting a suit. Sunday the 23rd is glassy but tiny.
Come Monday morning the 24th of August, we get a pulse. A 6ft swell from the NNW, with an 11-second period, and a light cross-offshore breeze. The water’s a touch warmer than normal at 62°F. That’s clean, lined-up reef surf, and the energy is moderate (763). That’s your best bet of the first week. The afternoon drops off a bit.
Tuesday the 25th is weak, and from Wednesday 26th through Tuesday 1st September, it’s a mix of small, windy, or just average. There’s a tiny window Sunday morning 30th August with a light offshore and 4ft, but it’s nothing to write home about.
Now, the long-range. Wednesday morning the 2nd of September brings a 7ft swell from the west (10-second period), with light offshore wind and a clean surface. The energy is strong (768). That’s the pick of the whole forecast. That same afternoon gets huge—12ft from the west with a very long 12-second period. That’s for experts only. The energy is massive (3372), and the wind is cross-shore, so it might be a little bumpy. That’s a serious groundswell, perfect for a reef.
Thursday 3rd and Friday 4th September are back to onshore junk. Then Saturday morning the 5th of September has a clean, offshore morning with 6ft from the NW (9 seconds) and moderate energy (542). A good finish.
The standout mornings: Monday 24th August for a clean, solid wave, and Wednesday 2nd September for the big, powerful session.
Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri morning. Very mild (max 17°C on Sun afternoon, min 12°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Wed afternoon. Warm (max 20°C on Mon afternoon, min 13°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | N 6 | N 6 | N 6 | N 5 | WSW 9 | NNE 9 | WNW 9 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | W 9 | WSW 9 | W 8 | NW 8 | NW 8 | N 10 | WNW 10 | WNW 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 243 | 156 | 66 | 20 | 15 | 16 | 15 | 36 | 377 | 759 | 555 | 362 | 202 | 147 | 69 | 35 | 43 | 32 | 346 | 399 | 393 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | cross | off | on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on |
High Tide | 12:49PM2.36m | 1:31AM2.17m | 2:25PM2.35m | 3:09AM2.20m | 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 | ||||||||
Low Tide | 7:15PM1.34m | 7:46AM1.33m | 9:03PM1.31m | 9:17AM1.23m | 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 | ||||||||
 | |  |  |  |  |  | | | | | | | | |  |  | | | | | |
 | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — |
 | — | 8:54 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — |
mm | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | — | — | — | — |
Temp °C | 14 | 14 | 14 | 16 | 16 | 14 | 16 | 17 | 14 | 18 | 20 | 17 | 18 | 19 | 18 | 18 | 18 | 17 | 18 | 18 | 15 |
Feels °C | 8 | 8 | 9 | 14 | 13 | 13 | 15 | 15 | 13 | 14 | 15 | 14 | 13 | 14 | 14 | 15 | 15 | 13 | 17 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | W 8 | WSW 8 | WSW 8 | N 5 | N 5 | WNW 6 | NW 5 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | W 9 | WSW 9 | W 8 | NW 8 | NW 8 | NW 8 | WNW 10 | WNW 10 | W 9 |
| kJ | 45 | 14 | 14 | 20 | 13 | 13 | 14 | 36 | 377 | 759 | 555 | 362 | 202 | 147 | 69 | 35 | 43 | 30 | 346 | 399 | 393 |
Swell 2 Height (m) Direction Period (s) | W 17 | WNW 8 | NNE 9 | WNW 6 | WSW 9 | NNE 9 | WNW 9 | WNW 8 | WSW 9 | W 14 | NW 12 | NW 11 | NW 9 | NW 11 | NW 9 | W 8 | WSW 8 | W 7 | N 10 | N 9 | N 9 |
| kJ | 6 | 11 | 15 | 13 | 15 | 16 | 15 | 13 | 17 | 4 | 124 | 42 | 21 | 29 | 22 | 31 | 19 | 15 | 29 | 27 | 24 |
Swell 3 Height (m) Direction Period (s) | — | W 16 | WNW 7 | WSW 9 | NW 10 | WSW 9 | WSW 9 | WSW 8 | N 8 | — | — | — | NW 12 | NW 8 | NE 6 | N 10 | N 11 | N 10 | — | — | — |
| kJ | — | 5 | 9 | 16 | 4 | 15 | 7 | 7 | 5 | — | — | — | 21 | 11 | 1 | 9 | 21 | 32 | — | — | — |
Wind waves Height (m) Direction Period (s) | N 6 | N 6 | N 6 | — | WNW 6 | — | — | — | — | E 8 | E 8 | — | E 3 | E 3 | ESE 4 | SE 3 | SE 3 | — | SSE 2 | — | — |
| kJ | 243 | 156 | 66 | — | 15 | — | — | — | — | 5 | 1 | — | 5 | 6 | 11 | 5 | 2 | — | 1 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 297 | 297 | 139 | 69 | 246 | 244 | 171 | 11 | 0 | 0 | 10 | 0 | 39 | 139 | 10 | 11 | 83 | 11 | 10 | 11 | 201 |
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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