Surf Forecasts:
Kilcummin Harbour surf forecast from 29 Aug 2026:
- Best quality surf: Friday 4 Sep, 10PM (local time) - 10ft (3.0m), 11s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 10AM (local time) - 16ft (5.0m), 13s period, WNW swell with 8,265 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 5.0m 13s and forecast to arrive on Friday (Sep 04) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Sep 02) at 7AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 30th Aug) | 2ft (0.6m) 10s |
| Best Surf | 10PM (Fri 4th Sep) | 10ft (3.0m) 11s |
| Most Powerful | 10AM (Fri 4th Sep) | 16ft (5.0m) 13s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Kilcummin Harbour.
It’s a slow start, no doubt about it. The first few days are a bit of a write-off, with tiny, weak swell and poor conditions. You’ll be sitting on the beach for Saturday and Sunday, the 29th and 30th, watching the ripples. The water temp is sitting at 62°, which is a touch warmer than normal for this time of year, so it’s not all bad news.
We finally get a little pulse of life on Monday the 31st, but it’s messy with a cross-shore wind. The combined energy is moderate (740), but it’s not worth getting excited about. The real window opens up on Tuesday, the 1st of September. Morning looks the pick with a clean 8ft swell from the west, a solid offshore breeze from the SSW, and a decent kick of energy (746). That’s the first true standout – a clean, powerful day for the experienced crew. Anything over 8ft is expert territory, and this one’s right on the edge.
Wednesday the 2nd has a smaller, cleaner morning at 5ft, and the energy is still there (455). It’s a good follow-up session. Thursday the 3rd gets a bit wild with an 8ft swell in the morning and a 10ft in the afternoon, but the wind is a cross-offshore, keeping it reasonably clean. The energy is huge (1256 and 1477), so it’s powerful – again, only for the brave.
The 4th of September is a no-go. That’s a big, stormy, lumpy mess with 16ft swell and a cross-on wind. The energy is off the charts (8295), but it’s unsurfable. The 5th has a clean offshore wind but the swell is down again, and the 6th is choppy.
Now, look ahead to the 7th of September (Monday). That’s another standout. The morning is glassy with a light cross-offshore breeze, a clean 7ft swell from the west, and a combined energy of 988. This is a top-tier session. The water is likely still warm, and the conditions are set up for a great day. The 8th and 9th get messy again with cross-shore winds and longer period swells that might not hold their shape perfectly at this spot.
The last few days of the forecast, from the 10th onward, fizzle out. The swell drops, the wind picks up, and it’s back to the drawing board. Nothing to report there.
The Pick: Tuesday the 1st of September morning for the big, clean power, and Monday the 7th of September morning for the near-perfect, glassy conditions. Don’t sleep on those.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Sat morning. Very mild (max 16°C on Sat afternoon, min 13°C on Sat night). Winds increasing (calm on Sat afternoon, fresh winds from the WNW by Sun night). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Tue afternoon. Very mild (max 18°C on Wed morning, min 13°C on Wed night). Winds increasing (light winds from the SSW on Tue night, near gales from the W by Thu night). | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 | WSW 10 | W 9 | WNW 6 | NW 8 | W 10 | W 7 | W 8 | WNW 9 | W 8 | WSW 8 | N 10 | W 8 | W 9 | WNW 9 | W 10 | WNW 13 | WNW 12 | WNW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 26 | 29 | 19 | 131 | 169 | 387 | 408 | 369 | 161 | 728 | 708 | 283 | 333 | 305 | 828 | 1106 | 1361 | 2337 | 8265 | 4934 | 1526 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | off | cross-off | cross-on | cross-on | cross | cross-off | off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | off |
High Tide | 7:25PM3.64m | 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 | ||||||||
Low Tide | 1:05PM0.21m | 1:36AM0.10m | 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 | ||||||||
 |  |  |  | |  | |  | | |  | | |  |  | | | | | |  | |
 | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — | 6:48 | — | — |
 | — | 8:36 | — | — | 8:34 | — | — | 8:30 | — | — | 8:29 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — |
mm | 1 | — | — | 2 | 2 | 1 | — | — | — | 1 | 8 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 15 | 16 | 14 | 15 | 16 | 14 | 16 | 15 | 15 | 18 | 18 | 15 | 15 | 15 | 14 | 14 | 15 | 13 |
Feels °C | 14 | 16 | 14 | 15 | 15 | 8 | 10 | 11 | 11 | 12 | 12 | 14 | 15 | 14 | 11 | 8 | 7 | 4 | 7 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | N 6 | N 6 | N 6 | WSW 10 | W 9 | W 11 | NW 8 | NNW 8 | NNW 7 | NNW 7 | WNW 9 | W 8 | N 8 | N 10 | N 11 | N 11 | N 11 | N 10 | N 10 | — | WNW 10 |
| kJ | 26 | 29 | 19 | 131 | 169 | 10 | 408 | 209 | 57 | 18 | 708 | 283 | 105 | 305 | 267 | 144 | 110 | 72 | 30 | — | 1526 |
Swell 2 Height (m) Direction Period (s) | NW 7 | NW 7 | NW 6 | N 6 | N 7 | — | — | — | W 9 | — | NNW 7 | N 9 | N 12 | W 16 | NW 10 | W 18 | W 17 | — | — | — | N 8 |
| kJ | 14 | 8 | 6 | 30 | 33 | — | — | — | 73 | — | 18 | 220 | 12 | 5 | 25 | 6 | 6 | — | — | — | 63 |
Swell 3 Height (m) Direction Period (s) | W 7 | W 7 | WSW 10 | NW 6 | NW 6 | — | — | — | W 9 | — | W 18 | W 17 | W 16 | — | — | — | — | — | — | — | — |
| kJ | 4 | 3 | 10 | 1 | 1 | — | — | — | 74 | — | 6 | 6 | 5 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | SSW 4 | — | WNW 6 | W 10 | W 10 | W 7 | W 8 | — | SSE 2 | WSW 8 | WSW 7 | W 8 | W 9 | WNW 9 | W 10 | WNW 13 | WNW 12 | — |
| kJ | — | — | — | 1 | — | 387 | 332 | 369 | 161 | 728 | — | 1 | 333 | 302 | 828 | 1106 | 1361 | 2337 | 8265 | 4934 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 116 | 171 | 155 | 0 | 163 | 289 | 233 | 2 | 0 | 0 | 2 | 0 | 0 | 129 | 159 | 589 | 1212 | 538 | 561 | 730 | 0 |
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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