
Surf Forecasts:
Kilcummin Harbour surf forecast from 9 Sep 2026:
- Best quality surf: Friday 11 Sep, 7PM (local time) - 8ft (2.5m), 12s period, WNW swell with offshore winds.
- Most powerful swell: Saturday 12 Sep, 4AM (local time) - 11ft (3.5m), 12s period, W swell with 3,000 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 7AM (local time) - 6ft (1.9m), 9s 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 Friday (Sep 11) at 7AM. The primary swell is predicted to be 1.9m and 9s period with a secondary swell of 0.1m 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 3.5m 12s and forecast to arrive on Saturday (Sep 12) 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 2.1m 8s period and expected on Saturday (Sep 12) at 1AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 11th Sep) | 6ft (1.9m) 9s |
| Best Surf | 7PM (Fri 11th Sep) | 8ft (2.5m) 12s |
| Most Powerful | 4AM (Sat 12th Sep) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Right, folks, Rusty here. Let's have a look at what's on the menu for Kilcummin Harbour over the next couple of weeks.
Straight up, it's a mixed bag with some standout windows for the experienced crew, but a fair bit of iffy stuff to wade through first. The water’s sitting at a warm 61°, which is a touch warmer than you'd usually get at this time of year.
We’ve got nothing doing right now, a gap of a few days before the first real action appears. That kicks off early on Wednesday the 9th of September. It’s small, around 6ft from the north with a weak energy reading (811), but the morning wind is clean and cross-off. It’s nothing to write home about though. The last of the ‘marginal’ tags before we get to the good stuff is on Friday the 11th. The afternoon sees a bit of a jump in size to 7ft from the WNW, and the period stretching out to 11 seconds. The energy is moderate to strong (1556), but the wind is just okay.
The first real eye-opener comes early on Saturday the 12th. We’re looking at a solid 10ft of WNW groundswell, with a period of 12 seconds and a combined energy of 2777. That’s a hefty amount of power, but it's pushing into the too-big-for-beginners territory and is more for the experienced lads. The wind is cross-off in the morning, making for a clean, heavy session. By the afternoon, the wind swings onshore and it gets choppy, so hit it early.
Sunday the 13th is where it gets really interesting, especially for the quality. The morning shows 6ft from the NW with a classic 11-second period. The real magic is the wind: a glassy, light offshore from the SSW. That'll put a clean face on it, and the energy (802) is moderate. This is the pick of the first week for a good, clean surfer’s wave. The afternoon holds similar quality with a gentle offshore.
There’s a lull in quality through the middle of the week, with onshore winds and messy conditions, before we get a serious standout on Thursday the 18th of September. Both the morning and afternoon sessions are firing with excellent conditions for experienced surfers. The swell sits around 8ft from the WNW with a 12-second period, packing a strong energy punch (1934). The wind is a moderate offshore, so the waves will be clean and powerful.
The absolute best on offer, no question, is Monday the 21st of September. The morning has a beautiful 7ft of WNW groundswell, a long 12-second period, and an energy of 1240. That alone is solid, but the wind is practically dead calm—a slight air, basically glassy. The afternoon is just as good, with a gentle offshore from the SSE keeping 7ft of W swell perfectly clean. Tuesday the 22nd follows up with more of the same quality: 8ft of W swell and a gentle offshore wind. For the experienced surfer, this is a run of absolute gold. The later days of the month show a big pulse for the 24th, but it’s right on the edge of being too big for many, hitting 12ft.
So, for the average punter, Sunday the 13th of September morning is your best bet for a clean, manageable wave. For the experienced crew who don’t mind some power, the run from Saturday the 12th morning through to Monday the 22nd has some absolute crackers.
Remember, Kilcummin Harbour is a reef setup and it’s fairly consistent, so it’s a reliable spot. Just keep an eye on the crowds, they can show up sometimes when it’s good.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Fri night. Very mild (max 17°C on Fri night, min 12°C on Wed night). Winds decreasing (fresh winds from the S on Wed night, light winds from the SW by Thu night). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Mon night. Very mild (max 19°C on Mon afternoon, min 13°C on Sat night). Winds increasing (light winds from the WSW on Sat night, fresh winds from the SW by Mon morning). | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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 9 | W 7 | WSW 9 | WSW 10 | W 10 | W 9 | WNW 9 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | NW 11 | NW 10 | NW 9 | N 13 | WSW 8 | W 9 | W 10 | WNW 10 | WNW 11 |
Wave Graph | ||||||||||||||||||||
251 | 131 | 436 | 819 | 682 | 617 | 627 | 1968 | 2894 | 1661 | 1082 | 791 | 480 | 190 | 268 | 328 | 670 | 682 | 1202 | 2112 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | cross | cross-off | cross-off | off | cross | cross-on | cross | off | off | cross-off | cross-off | cross-off | off | cross | cross-on | cross-on |
High Tide | 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 | 8:49AM3.19m | 9:05PM3.12m | |||||||
Low Tide | 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 | 2:47PM0.39m | 3:04AM0.51m | |||||||
— | — | 6:58 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | |
8:08 | — | — | 8:07 | — | — | 8:04 | — | — | 8:01 | — | — | 7:59 | — | — | 7:57 | — | — | 7:53 | — | |
mm | — | — | — | 1 | — | — | — | 10 | — | — | — | — | — | 2 | 1 | — | 6 | — | — | — |
Temp °C | 15 | 14 | 16 | 16 | 14 | 16 | 16 | 17 | 16 | 14 | 14 | 15 | 16 | 17 | 18 | 19 | 16 | 15 | 13 | 13 |
Feels °C | 11 | 8 | 12 | 11 | 11 | 12 | 12 | 12 | 14 | 11 | 11 | 12 | 13 | 15 | 14 | 16 | 13 | 12 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | N 9 | W 7 | W 11 | N 7 | N 7 | W 9 | WNW 9 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | NW 11 | NW 10 | NW 9 | N 13 | N 13 | N 12 | N 12 | N 11 | N 10 |
251 | 131 | 85 | 4 | 1 | 617 | 627 | 1968 | 2894 | 1661 | 1082 | 791 | 480 | 190 | 268 | 259 | 139 | 98 | 84 | 32 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | N 8 | SE 5 | — | N 8 | — | NW 12 | — | — | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 9 | WNW 8 | W 11 | — | — | — | — |
197 | 61 | 10 | — | 1 | — | 314 | — | — | 410 | 209 | 147 | 110 | 62 | 62 | 121 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | W 13 | W 12 | N 7 | — | — | — | NW 18 | — | — | N 10 | N 9 | — | N 11 | N 13 | WSW 8 | — | — | — | — | — |
3 | 11 | 9 | — | — | — | 12 | — | — | 2 | 2 | — | 10 | 86 | 53 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SSE 3 | WSW 9 | WSW 10 | W 10 | — | — | SW 8 | — | — | — | — | — | SE 3 | SSE 3 | WSW 8 | W 9 | W 10 | WNW 10 | WNW 11 |
— | 8 | 436 | 819 | 682 | — | — | 599 | — | — | — | — | — | 2 | 9 | 328 | 670 | 682 | 1202 | 2112 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2 | 2 | 0 | 233 | 550 | 233 | 2 | 2 | 501 | 174 | 233 | 2 | 0 | 0 | 0 | 0 | 145 | 2 | 55 | 259 |
Best forecast wave conditions in Mayo and Achill Island | ||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.










