
Surf Forecasts:
Kilcummin Harbour surf forecast from 7 Sep 2026:
- Best quality surf: Friday 11 Sep, 10PM (local time) - 10ft (3.0m), 14s period, WNW swell with cross-offshore winds.
- Most powerful swell: Saturday 12 Sep, 4AM (local time) - 11ft (3.5m), 13s period, WNW swell with 4,009 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 4AM (local time) - 7ft (2.2m), 10s period with NNW 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 4AM. The primary swell is predicted to be 2.2m and 10s period with a secondary swell of 1.7m and 9s. 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 13s and forecast to arrive on Saturday (Sep 12) at 4AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Thursday (Sep 10) at 1PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 9th Sep) | 7ft (2.2m) 10s |
| Best Surf | 10PM (Fri 11th Sep) | 10ft (3.0m) 14s |
| Most Powerful | 4AM (Sat 12th Sep) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer for Kilcummin Harbour over the next couple of weeks. It’s a mixed bag, so we’ll have to pick our moments.
The coming days kick off with a fair bit of swell, but the wind is a problem. Monday morning has a 8ft groundswell from the west wrapping in, solid energy (1433), but that 16 mph SW cross-off is not ideal. The water’s sitting at 61°, a touch warmer than normal for the time of year, which is a nice bonus for the back of the car. Monday afternoon gets bigger – 10ft – but the wind jumps to 22 mph and it’s messy. Not the day for it.
Tuesday the 8th is a write-off. Swell hits 13ft with a strong cross-on breeze; that’s over 8ft, so only for experts anyway, and the wind ruins it. Don’t bother.
Wednesday morning the 9th is our first real standout. It drops back to 5ft from the north, period 9 seconds, with a light 9 mph WSW cross-off. The energy is much more manageable at 762, and the water should still be feeling that warmer signal. This is a clean, fun size for an intermediate, and it’s a reef so that longer-period swell will line up nicely. Look for a window there. The crowds are “sometimes,” so you might not have it entirely to yourself, but it’s worth the paddle.
Thursday the 10th is another good call. We get offshore all day – morning has 7ft from the WSW with clean conditions and a moderate offshore breeze. The swell energy (890) is moderate, with a 10-second period. Afternoon cleans up even more with 6ft and a steady offshore. That’s a solid day for Kilcummin.
The weekend kicks off with a big pulse. Saturday the 12th has a 10ft swell early, jumping to a very long 13-second period from the WNW. That’s a heap of energy (3259). The morning’s a fresh offshore, and it’s clean, but that size is only for experienced surfers. The afternoon holds 8ft with a moderate offshore – excellent for those with the skills. This is a standout if you’re after power.
Sunday the 13th afternoon suddenly turns glassy. Only 5ft and 10-second period, but glassy – that’s a rare treat. You’ll get clean little runners.
After that, the second week gets lumpy. Strong cross-shore winds on the 15th push 10ft swell into a messy chop. Not worth it. There’s a brief window Wednesday the 16th with 8ft and clean cross-off, but it’s more of the same. The 19th sees another big groundswell (12ft from the NW, 13 seconds, 3754 energy) with a fresh cross-off, but that’s serious size and you’ll need to be on it.
Overall, the best bets are Wednesday morning the 9th for a clean, manageable session, and Saturday the 12th for the big, powerful groundswell if you’ve got the experience. Sunday afternoon’s glassy spell is a hidden gem. The rest is a mix of wind issues or too much size.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon morning. Very mild (max 16°C on Wed afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the WNW on Tue morning, light winds from the WSW by Tue night). | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Sat morning. Very mild (max 17°C on Thu afternoon, min 12°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | W 9 | W 10 | WNW 10 | WNW 10 | NW 10 | NNW 10 | N 9 | N 9 | W 7 | WSW 10 | W 10 | W 10 | W 8 | WNW 8 | WNW 13 | WNW 13 | WNW 13 | WNW 12 | WNW 11 | WNW 10 | WNW 9 |
Wave Graph | |||||||||||||||||||||
984 | 1662 | 2458 | 3095 | 2514 | 1314 | 449 | 225 | 178 | 880 | 640 | 524 | 412 | 284 | 3805 | 3259 | 2349 | 1425 | 595 | 378 | 148 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-off | cross-off | off | off | off | cross | cross | cross | off | off | off | cross-off | cross-on | glassy | off |
High Tide | 3:35PM2.94m | 4:17AM2.71m | 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 | ||||||||
Low Tide | 10:06PM0.67m | 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 | ||||||||
6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | |
— | 8:14 | — | — | 8:12 | — | — | 8:08 | — | — | 8:07 | — | — | 8:04 | — | — | 8:01 | — | — | 7:59 | — | |
mm | 1 | — | — | 1 | — | — | — | — | — | 1 | 2 | 1 | — | — | 1 | 4 | 2 | — | — | — | — |
Temp °C | 15 | 15 | 13 | 14 | 14 | 13 | 15 | 16 | 14 | 15 | 17 | 15 | 15 | 16 | 13 | 15 | 17 | 17 | 15 | 16 | 14 |
Feels °C | 10 | 7 | 7 | 6 | 7 | 8 | 11 | 11 | 11 | 11 | 14 | 12 | 11 | 12 | 10 | 10 | 14 | 14 | 14 | 16 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | N 9 | — | — | N 12 | NNW 10 | N 9 | W 8 | W 7 | WSW 10 | W 10 | N 8 | — | WNW 8 | WNW 13 | WNW 13 | WNW 13 | WNW 12 | WNW 11 | WNW 10 | WNW 9 |
447 | 2 | — | — | 270 | 1314 | 449 | 223 | 178 | 880 | 640 | 1 | — | 284 | 3805 | 3259 | 2349 | 1425 | 595 | 378 | 148 | |
Swell 2 Height (m) Direction Period (s) | N 9 | — | — | — | — | W 10 | WNW 8 | N 9 | N 8 | N 8 | ESE 5 | — | — | W 9 | — | — | — | N 9 | WSW 9 | N 12 | WSW 8 |
2 | — | — | — | — | 589 | 300 | 225 | 63 | 10 | 2 | — | — | 154 | — | — | — | 2 | 110 | 11 | 112 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NW 9 | W 13 | W 12 | — | N 8 | — | — | WNW 11 | — | — | — | — | N 9 | N 9 | NNW 12 |
— | — | — | — | — | — | 13 | 3 | 11 | — | 4 | — | — | 186 | — | — | — | — | 6 | 6 | 49 | |
Wind waves Height (m) Direction Period (s) | W 9 | W 10 | WNW 10 | WNW 10 | NW 10 | — | — | — | SSW 4 | SE 4 | S 4 | W 10 | W 8 | — | — | S 4 | SSE 4 | — | — | WSW 9 | SSW 3 |
984 | 1662 | 2458 | 3095 | 2514 | — | — | — | 11 | 1 | 16 | 524 | 412 | — | — | 9 | 10 | — | — | 126 | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 544 | 269 | 456 | 730 | 2 | 0 | 2 | 0 | 11 | 0 | 504 | 244 | 247 | 0 | 233 | 0 | 171 | 55 | 0 | 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.










