Surf Forecasts:
Kilcummin Harbour surf forecast from 4 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 1AM (local time) - 16ft (5.0m), 12s period, WNW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 4AM (local time) - 18ft (5.5m), 13s period, WNW swell with 9,410 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 7AM (local time) - 8ft (2.5m), 11s period with WNW 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 Saturday (Sep 05) at 7AM. The primary swell is predicted to be 2.5m and 11s period with a secondary swell of 1.0m and 8s. 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 5.5m 13s and forecast to arrive on Tuesday (Sep 08) 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 1.9m 10s period and expected on Sunday (Sep 06) at 4PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 5th Sep) | 8ft (2.5m) 11s |
| Best Surf | 1AM (Tue 8th Sep) | 16ft (5.0m) 12s |
| Most Powerful | 4AM (Tue 8th Sep) | 18ft (5.5m) 13s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, Rusty here again, this time in feet and miles. Let’s talk Kilcummin Harbour.
The water’s about 62°F, a little warmer than usual for the season – not bad.
Your best chance to score is going to be Saturday, September 5th. We’ve got a WNW groundswell easing from 8ft in the morning down to 7ft in the afternoon, with a solid 10-second period. The wind is light SW, cross-off in the morning, then light S and offshore in the afternoon. That means clean faces and good shape. Moderate wave energy at 1237. This is the session to point your car at.
Sunday the 6th, the swell gets small – 3ft from the W with a short 8-second period. The offshore wind is there but the energy is only 175. A kite board would be more fun than a paddle board with that fresh breeze.
Monday the 7th sees the swell jump back up to 10ft to 12ft of WNW groundswell, 10-second period. But the wind is fresh to strong cross-off, so it’s messy and marginal. Tuesday the 8th is even bigger – 18ft to 16ft of WNW swell at a long 12-second period, with massive energy readings of 8397 and 6621. That’s a lot of water moving, but the cross-shore wind makes it poor and lumpy. Experts only if you’re crazy enough.
Wednesday afternoon the 9th might give you a clean-up. Swell drops to 5ft from the N, 9-second period, with a light cross-off from the W. Conditions turn clean, and the energy sits at 782. A decent sneaky session.
Into the second week, look at Sunday the 13th. NW swell at 5ft, light offshore from the S, 422 energy. Clean, user-friendly surf. Friday the 18th is also a good bet – 4ft from the WNW with a light S offshore, clean and fun at 255 energy.
Tuesday the 15th afternoon is another one for the experienced. Swell is 7ft from the WNW with a long 12-second period, cross-off wind from the SW, and 1426 energy. Clean enough, but watch for the longer lulls between sets.
So the standout is Saturday the 5th. The rest has some small windows of clean fun, but that Saturday is the one to circle.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon morning. Very mild (max 19°C on Sun morning, min 12°C on Mon morning). Winds decreasing (fresh winds from the W on Fri afternoon, light winds from the S by Sat afternoon). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Wed night. Very mild (max 17°C on Thu morning, min 12°C on Mon night). Winds decreasing (fresh winds from the WSW on Mon afternoon, light winds from the S by Wed afternoon). | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 12 | WNW 12 | WNW 10 | WNW 10 | W 9 | W 8 | W 19 | W 11 | W 10 | W 10 | WNW 12 | WNW 12 | WNW 12 | NW 11 | NW 9 | N 9 | W 8 | W 8 | W 9 | W 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 5942 | 3551 | 1130 | 752 | 225 | 144 | 7 | 831 | 1697 | 2423 | 7540 | 8397 | 6621 | 3776 | 1532 | 402 | 186 | 198 | 286 | 400 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 11:49PM2.56m | 12:36PM2.60m | 1:27AM2.41m | 2:14PM2.67m | 3:05AM2.49m | 3:35PM2.94m | 4:17AM2.71m | 4:35PM3.27m | 5:09AM2.95m | 5:23PM3.57m | 5:53AM3.15m | 6:06PM3.78m | ||||||||
Low Tide | 5:20PM0.95m | 5:55AM1.03m | 6:59PM1.08m | 7:36AM1.11m | 8:50PM0.96m | 9:09AM0.97m | 10:06PM0.67m | 10:12AM0.71m | 11:00PM0.36m | 11:01AM0.45m | 11:44PM0.11m | 11:44AM0.24m | 00:22AM-0.05m | |||||||
 |  |  |  |  | |  | |  | | | | | | | |  | | | | |
 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — |
 | 8:22 | — | — | 8:19 | — | — | 8:16 | — | — | 8:14 | — | — | 8:12 | — | — | 8:08 | — | — | 8:07 | — |
mm | — | — | — | — | — | — | 2 | — | 3 | — | — | 1 | 1 | — | — | — | 6 | 1 | — | — |
Temp °C | 15 | 14 | 16 | 15 | 17 | 19 | 18 | 14 | 14 | 14 | 13 | 14 | 14 | 13 | 14 | 14 | 13 | 17 | 18 | 16 |
Feels °C | 8 | 9 | 13 | 13 | 14 | 15 | 14 | 9 | 7 | 6 | 6 | 7 | 7 | 7 | 10 | 11 | 11 | 14 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | — | — | WNW 10 | WNW 10 | W 9 | W 8 | NNW 8 | W 15 | N 9 | — | — | — | — | — | NW 9 | N 9 | W 8 | W 8 | W 9 | N 6 |
| kJ | — | — | 1130 | 752 | 225 | 144 | 7 | 275 | 2 | — | — | — | — | — | 1532 | 402 | 186 | 198 | 286 | 3 |
Swell 2 Height (m) Direction Period (s) | — | — | NNW 8 | NNW 8 | NNW 8 | NNW 8 | N 10 | N 10 | — | — | — | — | — | — | — | WNW 9 | N 8 | N 7 | N 6 | W 8 |
| kJ | — | — | 107 | 60 | 76 | 23 | 2 | 2 | — | — | — | — | — | — | — | 380 | 117 | 24 | 12 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 13 | NNW 9 | W 19 | — | — | — | — | — | — | — | — | — | W 12 | SSE 3 | — | — |
| kJ | — | — | — | — | 3 | 8 | 7 | — | — | — | — | — | — | — | — | — | 11 | 1 | — | — |
Wind waves Height (m) Direction Period (s) | WNW 12 | WNW 12 | — | — | SSE 4 | SSE 4 | SW 10 | W 11 | W 10 | W 10 | WNW 12 | WNW 12 | WNW 12 | NW 11 | — | — | S 3 | — | — | W 10 |
| kJ | 5942 | 3551 | — | — | 18 | 50 | 739 | 831 | 1697 | 2423 | 7540 | 8397 | 6621 | 3776 | — | — | 4 | — | — | 400 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 730 | 233 | 0 | 0 | 0 | 484 | 519 | 2 | 209 | 730 | 283 | 639 | 837 | 1013 | 227 | 0 | 0 | 31 | 233 | 283 |
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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