Surf Forecasts:
Kilcummin Harbour surf forecast from 30 Aug 2026:
- Best quality surf: Thursday 3 Sep, 7PM (local time) - 15ft (4.5m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 4AM (local time) - 20ft (6.0m), 13s period, W swell with 11,416 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 7AM (local time) - 2ft (0.6m), 10s period with WSW 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 7AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.5m and 6s. 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 6.0m 13s and forecast to arrive on Friday (Sep 04) 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 0.7m 4s period and expected on Wednesday (Sep 02) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 30th Aug) | 2ft (0.6m) 10s |
| Best Surf | 7PM (Thu 3rd Sep) | 15ft (4.5m) 11s |
| Most Powerful | 4AM (Fri 4th Sep) | 20ft (6.0m) 13s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Right then, folks. Rusty here. Let's have a look at what's on the cards for our patch.
The start of this 16-day run is a bit of a write-off, truth be told. We're looking at a solid four days of nothing much to write home about, with only small, weak swells and the odd bit of rain. The first real glimmer of hope doesn't show up until Monday, the 1st of September, but even then it's a marginal affair with moderate cross-off winds.
The real standout, and I mean the one to circle on the calendar, is Thursday, the 3rd of September. We’ve got a massive pulse of energy heading our way. The swell is forecast to be a serious 20ft out of the west, with a long-period of 13 seconds – that's proper groundswell. The combined energy is absolutely pumping, a colossal 13330, which is way up there. Now, the wind is a strong cross-off, but for a reef break, that can work. The catch? This is *expert only* territory. 20ft is no joke; it's a beast. The water temp is a touch warmer than average at 62°F for this time of year, which is a nice bonus if you're brave enough. This is not a day for beginners, and the crowds are only *sometimes* an issue, but on a day like this, only the brave will be out.
The other session worth a mention is Sunday, the 6th of September. The morning is looking at 8ft from the WSW with a moderate offshore wind from the SSE, which is clean. But the afternoon is where it's at – 8ft from the west with a 10-second period, and that same clean offshore wind. The combined energy is a solid 1180. This is excellent for experienced surfers, but it's still a solid wave, so keep your wits about you.
After that, the swell drops off again and the wind goes a bit haywire, with a lot of cross-shore and onshore junk. The 10th of September brings a late-afternoon pulse of 8ft with a 14-second period, but the wind is light cross-off, so it might be worth a look, though conditions are described as ordinary.
So, to sum it up: the first few days are a bust. The big one is Thursday the 3rd, but it's for experts only. Sunday the 6th afternoon is your best bet for a big, clean wave without it being a life-threatening size. After that, it gets patchy again.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Sat night. Very mild (max 18°C on Tue morning, min 13°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Tue night. Very mild (max 19°C on Wed afternoon, min 12°C on Thu night). Winds increasing (moderate winds from the SSE on Tue night, strong winds from the WNW by Fri morning). | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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) | WSW 10 | WSW 9 | WSW 9 | NW 7 | W 10 | W 9 | W 8 | W 8 | W 8 | W 8 | WSW 7 | W 8 | W 10 | W 11 | W 13 | WNW 13 | WNW 12 | WNW 11 | W 10 | WSW 9 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 131 | 138 | 108 | 226 | 320 | 343 | 466 | 450 | 190 | 227 | 314 | 675 | 2354 | 3677 | 10643 | 7260 | 4000 | 1273 | 363 | 724 | 813 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | cross | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-off | off | cross-off |
High Tide | 7:45AM3.21m | 7:56PM3.62m | 8:17AM3.22m | 8:30PM3.53m | 8:52AM3.16m | 9:06PM3.35m | 9:31AM3.05m | 9:47PM3.11m | 10:16AM2.89m | 10:39PM2.83m | 11:14AM2.71m | 11:49PM2.56m | 12:36PM2.60m | 1:27AM2.41m | |||||||
Low Tide | 1:36PM0.19m | 2:06AM0.10m | 2:10PM0.23m | 2:39AM0.17m | 2:46PM0.33m | 3:14AM0.32m | 3:26PM0.50m | 3:54AM0.54m | 4:14PM0.72m | 4:44AM0.79m | 5:20PM0.95m | 5:55AM1.03m | 6:59PM1.08m | ||||||||
 |  |  |  | |  |  | |  | | |  |  | | | | | | | | | |
 | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — |
 | — | 8:34 | — | — | 8:30 | — | — | 8:29 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:19 | — |
mm | 2 | 3 | 1 | — | — | — | — | — | 6 | 1 | — | — | — | — | 4 | — | — | — | — | 1 | 8 |
Temp °C | 16 | 17 | 15 | 15 | 16 | 14 | 18 | 17 | 17 | 17 | 19 | 16 | 16 | 16 | 14 | 14 | 14 | 14 | 15 | 15 | 18 |
Feels °C | 15 | 17 | 14 | 11 | 11 | 10 | 15 | 14 | 13 | 13 | 15 | 11 | 8 | 9 | 8 | 7 | 6 | 8 | 12 | 12 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 9 | WSW 9 | WSW 10 | NNW 7 | N 7 | N 7 | W 8 | W 8 | N 6 | N 8 | N 11 | N 11 | N 11 | N 10 | — | NNW 8 | WNW 11 | NNW 8 | NNW 7 | N 8 |
| kJ | 131 | 138 | 108 | 163 | 96 | 32 | 8 | 450 | 190 | 7 | 11 | 61 | 84 | 56 | 17 | — | 354 | 1273 | 116 | 43 | 19 |
Swell 2 Height (m) Direction Period (s) | N 6 | N 7 | WSW 11 | — | — | — | — | N 7 | N 6 | N 8 | N 12 | N 8 | N 10 | — | — | — | — | N 8 | W 14 | N 9 | — |
| kJ | 21 | 33 | 13 | — | — | — | — | 4 | 7 | 5 | 12 | 22 | 7 | — | — | — | — | 157 | 4 | 13 | — |
Swell 3 Height (m) Direction Period (s) | NW 6 | NW 6 | — | — | — | — | — | W 18 | N 9 | W 16 | W 16 | N 11 | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 1 | — | — | — | — | — | 6 | 6 | 5 | 5 | 9 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 3 | — | NW 5 | NW 7 | W 10 | W 9 | W 8 | — | SSE 3 | W 8 | WSW 7 | W 8 | W 10 | W 11 | W 13 | WNW 13 | WNW 12 | — | W 10 | WSW 9 | WSW 9 |
| kJ | 2 | — | 82 | 226 | 320 | 343 | 466 | — | 7 | 227 | 314 | 675 | 2354 | 3677 | 10643 | 7260 | 4000 | — | 363 | 724 | 813 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 155 | 2 | 10 | 171 | 550 | 2 | 2 | 233 | 2 | 11 | 817 | 194 | 508 | 1025 | 730 | 609 | 801 | 416 | 0 | 303 | 235 |
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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