Surf Forecasts:
Kilcummin Harbour surf forecast from 19 Aug 2026:
- Best quality surf: Monday 24 Aug, 7AM (local time) - 5.5ft (1.7m), 12s period, NW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 10AM (local time) - 10ft (3.0m), 9s period, N swell with 1,312 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 1PM (local time) - 2.5ft (0.7m), 7s 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 1PM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.4m and 8s. 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 3.0m 9s and forecast to arrive on Thursday (Aug 20) at 10AM. Winds are predicted to be onshore 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 7PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Sun 23rd Aug) | 2.5ft (0.7m) 7s |
| Best Surf | 7AM (Mon 24th Aug) | 5.5ft (1.7m) 12s |
| Most Powerful | 10AM (Thu 20th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, grab a coffee and listen up. The next couple of weeks here are a bit of a mixed bag, but there are a couple of sessions that are gonna be worth wetting a line for. We've got a lot of wind and dodgy conditions to start, but the latter part of the forecast period is looking seriously promising.
First up, the water temp is sitting at a relatively mild 62°F which is a touch warmer than usual for this time of year, so you might not need the thickest wetsuit, but it's still not tropical.
The best bet in the whole forecast is Thursday, the 27th of August. Wednesday night on the 26th, we’ve got some clean, offshore winds swinging in, but the real magic happens on Thursday. The morning on the 27th is looking clean with a south wind, and a solid 6 ft swell from the WNW. But the real standout is the Thursday afternoon session. We’re looking at 10 ft of WNW swell, combined with glassy, off-the-charts glass conditions. That’s a proper wave of energy (930) and it's groundswell, so expect some serious power. Kilcummin Harbour is a reef break, so that long-period groundswell is going to wrap in perfectly. Just be warned, with 10 ft faces, this is expert territory only. The crowds are sometimes an issue there, but on a Thursday with that size, you might get a few more waves to yourself.
Before that, we’ve got a long gap of poor surf. From Wednesday the 19th right through to Sunday the 23rd, it’s mostly blown out or tiny. Monday the 24th sees a bit of a pulse with 6 ft from the WNW and clean cross-off winds, but it’s only a marginal call. Things look a bit average until the 26th.
Looking further ahead, the first week of September is also shaping up nicely. On the 30th of August, the Sunday afternoon brings a 8 ft WSW swell with gentle offshore winds, so that’s another clean, powerful session. The 2nd of September Wednesday morning is also looking good with a 7 ft W swell and clean offshore winds. The 3rd of September Thursday morning still has a decent 6 ft WNW swell and clean offshore winds.
So, to sum it up: the first week is a bit of a write-off, but don't get disheartened. The 27th of August is your absolute standout, and the 30th of August and 2nd of September are also very strong options. This reef is exposed to the NNW, so those WNW and W swells are going to be solid.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Wed afternoon. Very mild (max 16°C on Wed afternoon, min 13°C on Thu afternoon). Winds decreasing (fresh winds from the N on Wed night, light winds from the NW by Fri night). | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Mon afternoon, min 12°C on Sat night). Winds increasing (calm on Sun morning, fresh winds from the ESE by Tue morning). | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 10 | W 10 | N 9 | N 8 | N 7 | N 7 | N 6 | NNW 6 | NNW 5 | N 5 | NW 6 | NW 7 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | W 9 | W 9 | W 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1043 | 752 | 1312 | 624 | 340 | 250 | 120 | 57 | 39 | 21 | 33 | 46 | 54 | 284 | 759 | 500 | 267 | 173 | 106 | 51 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | on | on | on | on | on | cross-on | on | cross-on | cross-on | cross-off | on | cross-off | cross-off | cross-off | cross | cross-off | cross | cross-off |
High Tide | 11:07PM2.61m | 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 | ||||||||
Low Tide | 4:45PM0.93m | 5:11AM1.02m | 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 | |||||||
 |  |  |  |  | | |  | |  |  | | | | | | | | | | |
 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — |
 | — | 9:00 | — | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — |
mm | 2 | 2 | — | — | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 16 | 14 | 14 | 14 | 14 | 13 | 14 | 14 | 14 | 14 | 13 | 15 | 15 | 15 | 18 | 21 | 18 | 17 | 18 | 18 |
Feels °C | 11 | 11 | 6 | 7 | 8 | 8 | 8 | 11 | 12 | 11 | 12 | 15 | 13 | 14 | 14 | 17 | 17 | 12 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | N 8 | W 10 | W 10 | W 9 | WNW 8 | WNW 8 | NW 6 | NNE 9 | WSW 9 | N 5 | NW 6 | NW 7 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | W 9 | W 9 | W 8 |
| kJ | 1 | 752 | 273 | 173 | 96 | 35 | 38 | 25 | 16 | 21 | 33 | 46 | 54 | 284 | 759 | 500 | 267 | 173 | 106 | 51 |
Swell 2 Height (m) Direction Period (s) | W 17 | — | W 16 | W 15 | W 15 | WSW 9 | WSW 8 | WSW 8 | WNW 6 | WSW 9 | WSW 9 | WNW 9 | WNW 8 | WSW 9 | WSW 9 | W 14 | NW 12 | NW 10 | NW 9 | N 11 |
| kJ | 6 | — | 5 | 4 | 4 | 16 | 14 | 14 | 4 | 15 | 15 | 15 | 13 | 8 | 8 | 4 | 68 | 25 | 13 | 10 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 17 | WNW 8 | WNW 7 | SW 16 | NW 10 | NNE 9 | WSW 9 | NNE 9 | N 8 | N 8 | — | N 8 | N 13 | N 12 | ENE 4 |
| kJ | — | — | — | — | — | 6 | 11 | 5 | 10 | 4 | 17 | 7 | 7 | 5 | 1 | — | 1 | 3 | 3 | 2 |
Wind waves Height (m) Direction Period (s) | WNW 10 | N 6 | N 9 | N 8 | N 7 | N 7 | N 6 | NNW 6 | NNW 5 | WNW 6 | — | — | — | — | SE 3 | — | ESE 3 | E 3 | E 4 | SE 3 |
| kJ | 1043 | 164 | 1312 | 624 | 340 | 250 | 120 | 57 | 39 | 15 | — | — | — | — | 3 | — | 3 | 8 | 13 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 194 | 1072 | 416 | 730 | 253 | 297 | 297 | 130 | 67 | 244 | 66 | 2 | 52 | 0 | 10 | 10 | 10 | 153 | 219 | 155 |
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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