Surf Forecasts:
Kilcummin Harbour surf forecast from 8 Sep 2026:
- Best quality surf: Friday 11 Sep, 7PM (local time) - 8ft (2.5m), 11s period, WNW swell with cross-offshore winds.
- Most powerful swell: Saturday 12 Sep, 7AM (local time) - 10ft (3.0m), 13s period, W swell with 3,289 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 10AM (local time) - 5.5ft (1.7m), 9s period with N 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 Wednesday (Sep 09) at 10AM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 1.5m 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 3.0m 13s and forecast to arrive on Saturday (Sep 12) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Saturday (Sep 12) at 7AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Wed 9th Sep) | 5.5ft (1.7m) 9s |
| Best Surf | 7PM (Fri 11th Sep) | 8ft (2.5m) 11s |
| Most Powerful | 7AM (Sat 12th Sep) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, Rusty here, lookin' at the same charts for Kilcummin Harbour but in feet and miles. Let’s cut the small talk.
The first few days are a total bust. Tuesday the 8th is a howling cross-onshore mess. Don’t even paddle out.
The first good chance is Wednesday morning, September 9th. We’ve got a 6 ft swell from the North, period of 9 seconds, with a clean cross-offshore wind. The water is about 61°, which is a touch warmer than average for this time of year.
Thursday the 10th morning sees a clean, light offshore wind blowing into a 5 ft WSW swell. Nice and clean, but the energy is moderate.
The standout is Saturday, September 12th. That morning delivers a solid 8 ft WNW swell (strong wave energy of 3653) with clean cross-offshore winds. That’s a big, powerful day. Beginners stay on the beach. For everyone else? That’s the call of the week.
Sunday the 13th lightens up to a cleaner 6 ft swell with lighter wind. The following Monday, the 14th, gives us a good 6 ft swell with a clean offshore breeze.
Later in the run, Monday, September 21st, is a proper sleeper. You’ve got a 7 ft swell with a long 11-second period and a ton of energy (1044). A gentle offshore wind will make it glassy and perfect for experienced surfers.
The very end of the window, around the 22nd and 23rd, turns nasty. Wednesday the 23rd shows a massive 12 ft groundswell but with howling onshore winds—that’s for the very brave or maybe just the kiteboarders. The energy is extreme at 5519.
Save your energy for Saturday the 12th and Monday the 21st.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue morning. Very mild (max 16°C on Wed afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the NW on Tue morning, light winds from the W by Tue night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Very mild (max 18°C on Sat morning, min 12°C on Sat night). Winds decreasing (fresh winds from the S on Fri night, light winds from the W by Sat night). | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | WNW 10 | NW 10 | NNW 10 | N 9 | N 9 | W 7 | WSW 9 | WSW 10 | W 10 | WNW 9 | WNW 11 | WNW 13 | WNW 12 | NW 13 | NW 12 | WNW 11 | WNW 10 | WSW 8 | W 11 | W 11 | W 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3034 | 2629 | 1412 | 505 | 215 | 159 | 355 | 680 | 761 | 724 | 1439 | 2717 | 1869 | 1676 | 1346 | 622 | 320 | 144 | 813 | 990 | 1128 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-off | cross-off | off | off | cross-off | cross | cross | cross | off | cross-off | cross-off | cross-on | cross-off | off | off | off | cross-off | cross |
High Tide | 4:35PM3.27m | 5:09AM2.95m | 5:23PM3.57m | 5:53AM3.15m | 6:06PM3.78m | 6:32AM3.30m | 6:44PM3.86m | 7:09AM3.38m | 7:21PM3.82m | 7:43AM3.38m | 7:56PM3.66m | 8:16AM3.32m | 8:31PM3.42m | ||||||||
Low Tide | 10:12AM0.71m | 11:00PM0.36m | 11:01AM0.45m | 11:44PM0.11m | 11:44AM0.24m | 00:22AM-0.05m | 12:23PM0.09m | 00:58AM-0.11m | 1:00PM0.04m | 1:31AM-0.07m | 1:36PM0.07m | 2:03AM0.06m | 2:11PM0.19m | 2:33AM0.27m | |||||||
 |  |  |  | |  |  |  |  | | |  | | | | | | | | |  | |
 | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — |
 | — | 8:12 | — | — | 8:08 | — | — | 8:07 | — | — | 8:04 | — | — | 8:01 | — | — | 7:59 | — | — | 7:57 | — |
mm | 2 | — | — | — | — | — | 1 | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | 8 |
Temp °C | 14 | 14 | 13 | 15 | 16 | 13 | 16 | 16 | 14 | 15 | 16 | 17 | 18 | 17 | 15 | 15 | 16 | 16 | 20 | 20 | 18 |
Feels °C | 7 | 7 | 7 | 11 | 12 | 9 | 13 | 12 | 10 | 11 | 13 | 13 | 13 | 14 | 14 | 13 | 14 | 13 | 16 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | — | NNW 12 | NNW 10 | N 9 | WNW 8 | W 7 | WSW 9 | N 7 | N 8 | WNW 9 | WNW 11 | WNW 13 | WNW 12 | NW 13 | NW 12 | WNW 11 | WNW 10 | WSW 8 | W 11 | W 11 | W 11 |
| kJ | — | 192 | 1412 | 505 | 197 | 159 | 355 | 4 | 1 | 724 | 1439 | 2717 | 1869 | 1676 | 1346 | 622 | 320 | 144 | 813 | 990 | 1128 |
Swell 2 Height (m) Direction Period (s) | — | — | WNW 9 | WNW 8 | N 9 | N 8 | N 7 | — | — | WNW 11 | — | — | N 11 | N 10 | WSW 9 | WSW 9 | WSW 9 | NW 9 | N 12 | N 12 | N 12 |
| kJ | — | — | 589 | 293 | 215 | 61 | 9 | — | — | 48 | — | — | 9 | 8 | 225 | 84 | 62 | 97 | 26 | 42 | 44 |
Swell 3 Height (m) Direction Period (s) | — | — | — | NW 9 | W 13 | W 12 | — | — | — | — | — | — | — | — | N 10 | N 9 | N 9 | N 13 | NNW 7 | — | — |
| kJ | — | — | — | 13 | 3 | 11 | — | — | — | — | — | — | — | — | 7 | 6 | 6 | 29 | 5 | — | — |
Wind waves Height (m) Direction Period (s) | WNW 10 | NW 10 | — | — | — | S 3 | S 4 | WSW 10 | W 10 | — | — | S 3 | WSW 10 | W 11 | — | — | SSE 2 | S 3 | S 3 | — | WNW 5 |
| kJ | 3034 | 2629 | — | — | — | 8 | 46 | 680 | 761 | — | — | 7 | 1775 | 1450 | — | — | 1 | 8 | 6 | — | 40 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 456 | 730 | 730 | 0 | 2 | 0 | 0 | 550 | 277 | 233 | 2 | 11 | 233 | 2 | 55 | 0 | 0 | 0 | 0 | 15 | 233 |
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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