Surf Forecasts:
Kilcummin Harbour surf forecast from 20 Aug 2026:
- Best quality surf: Monday 24 Aug, 4AM (local time) - 5ft (1.6m), 12s period, NW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 1PM (local time) - 8ft (2.4m), 8s period, N swell with 798 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 10PM (local time) - 3.5ft (1.1m), 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 1.1m and 10s period with a secondary swell of 0.2m and 10s. 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 2.4m 8s and forecast to arrive on Thursday (Aug 20) at 1PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Aug 25) at 1AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 23rd Aug) | 3.5ft (1.1m) 10s |
| Best Surf | 4AM (Mon 24th Aug) | 5ft (1.6m) 12s |
| Most Powerful | 1PM (Thu 20th Aug) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Right then, Rusty here again. Let's talk about Kilcummin Harbour in feet and miles per hour.
I’ll be honest, the forecast is looking bleak for the first week and a bit. Nearly ten days of onshore wind and messy conditions mean you’re better off doing something else. The water is sitting at 62°, which is a touch warmer than usual for this time of year, so that’s one small mercy while you stare at the lumpy, choppy nothing.
The first real chance for a surf comes on Monday, August 24th. There will be a 6ft swell from the WNW with a period of 11 seconds, carrying moderate energy. The wind turns cross-offshore and clean, so that morning and afternoon will have some rideable waves. It’s not going to be magic, but it’s the first clean surf in a while.
The big standout is Sunday, August 30th. Mark it down. We’re looking at a powerful 12ft NW groundswell early, with a huge amount of energy. The wind will be a light, clean offshore from the SSE, which is perfect – expect clean, powerful walls. This is for experts only. The swell direction lines up nicely with the break's best direction. The morning session is the one to chase. The afternoon gets even bigger at 13ft, but the wind changes, so don't sleep in.
Then on Monday, September 1st, there’s another solid day. A 5ft NNW swell with a gentle, clean offshore breeze from the South. The report says "expect good surf conditions," and with that wind, it’ll be a fun, less intimidating session after the big Sunday.
So, to wrap it up: the 24th of August is a low-key option, but the 30th of August is the big dog. That long-period groundswell with clean offshore wind is the best call in the whole forecast. The 1st of September is a solid, more manageable follow-up.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu night. Very mild (max 15°C on Sat morning, min 13°C on Thu night). Winds decreasing (fresh winds from the N on Thu afternoon, light winds from the WSW by Sat night). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon afternoon, min 13°C on Sun morning). Winds increasing (calm on Sun night, fresh winds from the ESE by Tue morning). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 9 | N 8 | N 7 | N 7 | NNW 6 | N 6 | WNW 5 | WSW 9 | NNE 9 | NW 7 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | W 9 | W 9 | W 8 | N 11 | W 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1088 | 569 | 294 | 193 | 160 | 43 | 19 | 15 | 27 | 44 | 36 | 384 | 698 | 562 | 262 | 127 | 74 | 64 | 57 | 234 | 251 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | cross-on | cross-off | cross-off | on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 11:38AM2.50m | 00:05AM2.33m | 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 | ||||||||
Low Tide | 5:44PM1.18m | 6:11AM1.24m | 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 | ||||||||
 |  |  | | |  |  | |  | | | | |  | | | |  |  | | | |
 | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — |
 | — | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:43 | — |
mm | 1 | — | 4 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — |
Temp °C | 14 | 14 | 14 | 13 | 14 | 13 | 15 | 15 | 14 | 16 | 17 | 15 | 17 | 20 | 18 | 19 | 20 | 19 | 17 | 17 | 17 |
Feels °C | 8 | 7 | 8 | 7 | 9 | 9 | 13 | 12 | 13 | 15 | 15 | 14 | 13 | 16 | 15 | 13 | 17 | 17 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 9 | WNW 8 | WNW 8 | WSW 8 | WNW 6 | N 5 | N 5 | NNE 9 | NW 7 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 10 | W 9 |
| kJ | 273 | 173 | 125 | 65 | 14 | 20 | 14 | 14 | 27 | 44 | 36 | 384 | 698 | 562 | 262 | 127 | 74 | 64 | 29 | 234 | 251 |
Swell 2 Height (m) Direction Period (s) | W 16 | W 15 | W 15 | W 17 | WNW 8 | NNE 9 | WSW 9 | WSW 9 | NNW 5 | WNW 9 | WNW 8 | WSW 10 | N 8 | W 14 | NW 12 | NW 10 | NW 9 | N 11 | N 11 | N 10 | N 10 |
| kJ | 5 | 4 | 4 | 6 | 11 | 26 | 16 | 15 | 6 | 15 | 14 | 9 | 1 | 4 | 89 | 49 | 41 | 39 | 57 | 75 | 69 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 16 | WSW 8 | NNE 9 | NW 10 | WNW 6 | WSW 9 | NW 11 | N 8 | W 14 | — | N 8 | N 12 | N 12 | NW 8 | WNW 7 | NE 5 | N 5 |
| kJ | — | — | — | — | 5 | 14 | 15 | 4 | 7 | 7 | 18 | 5 | 4 | — | 1 | 3 | 11 | 11 | 18 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | N 9 | N 8 | N 7 | N 7 | NNW 6 | N 6 | WNW 5 | WNW 6 | — | — | — | — | SE 3 | NE 8 | SE 3 | ESE 3 | E 3 | — | ESE 3 | — | — |
| kJ | 1088 | 569 | 294 | 193 | 160 | 43 | 19 | 15 | — | — | — | — | 1 | 2 | 4 | 4 | 3 | — | 1 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 416 | 1072 | 151 | 297 | 297 | 66 | 69 | 244 | 66 | 10 | 10 | 0 | 10 | 10 | 0 | 226 | 155 | 0 | 39 | 38 | 10 |
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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