
Surf Forecasts:
Kilcummin Harbour surf forecast from 3 Sep 2026:
- Best quality surf: Friday 4 Sep, 7AM (local time) - 16ft (5.0m), 12s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 10AM (local time) - 16ft (5.0m), 12s period, WNW swell with 7,971 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 7AM (local time) - 16ft (5.0m), 12s 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 04) at 7AM. The primary swell is predicted to be 5.0m and 12s period with a secondary swell of 0.4m 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 5.0m 12s and forecast to arrive on Friday (Sep 04) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Sunday (Sep 06) at 7AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 4th Sep) | 16ft (5.0m) 12s |
| Best Surf | 7AM (Fri 4th Sep) | 16ft (5.0m) 12s |
| Most Powerful | 10AM (Fri 4th Sep) | 16ft (5.0m) 12s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a proper look at what’s coming our way for Kilcummin Harbour over the next couple of weeks. It’s a bit of a mixed bag, so we’ll take it step by step.
We start off on Thursday, the 3rd of September, with some rideable but not spectacular surf. The morning shows 5 feet from the west, with a period of 8 seconds – that’s a short-period wind swell, so the energy is a bit weak. The wind is a cross-off from the southwest, which is okay for keeping things clean, but it’s not going to blow you away. The water temp is sitting at 62°, which is a touch warmer than normal for this time of year – feels like a little gift from the sea. By the afternoon, the swell picks up to 7 feet from the WSW, still short period, but the wind picks up too, making things feel a bit messy.
Friday the 4th is one to skip. The swell jumps to 16 feet and 15 feet from the WNW with a 12-second period, so there’s serious energy here, but the wind is howling straight cross-shore, creating horrible lumpy, cross-chop. That’s not surfable; that’s a washing machine. For the vast majority of us, it’s a no-go. Unless you’re a tow-in expert, sit this one out.
Things settle down a little for Saturday the 5th. The morning sees 8 feet from the WNW, period 10 seconds, with a gentle cross-off from the SSW. It’s clean, but the energy is moderate. The real highlight of the day is Saturday afternoon: 7 feet from the WNW, period 9 seconds, and the wind swings to a clean offshore from the south at 15 mph. That’s your best bet for the weekend. It’s not huge, but the offshore wind will hold the waves up nicely. It could get a little busy, as this spot can see a crowd sometimes.
Sunday the 6th drops off quickly. Swell drops below 5 feet, and while the wind stays offshore, it’s a fresh breeze, making it a bit more work for the paddle. Not the best.
We then hit a rough patch. From Monday the 7th right through to Tuesday the 8th, and into Wednesday the 9th morning, conditions are poor. Onshore winds, lumpy seas, and messy swell. There’s a brief moment of calm on Wednesday afternoon the 9th – the wind goes glassy (NE, 3 mph), and the swell is a tiny 4 feet from the west, 7 seconds. It’s a quiet, clean session for a log or a mini-mal, but no real power behind it.
Thursday the 10th sees a return of some hope. The morning brings 6 feet from the west with an 11-second period, a nice groundswell, cross-off winds from the SSE. Energy is moderate. The afternoon is cleaner still with a moderate offshore from the south at 12 mph, offering 5 feet from the west. That’s a solid, clean afternoon session.
Friday the 11th is a write-off – messy cross-shore winds and weak swell.
Now, we’re looking further ahead. Saturday the 12th of September brings a bump in size again: 8 feet from the WNW with an 11-second period in the morning, and 8 feet in the afternoon. The energy is strong, but the wind is a problem – strong cross-shore in the morning, and onshore in the afternoon. Not ideal.
Sunday the 13th and Monday the 14th are poor with onshore and cross-onshore winds. Not worth the drive.
Now, the real standout in the whole forecast is Tuesday the 15th of September. The morning shows a massive 12 feet swell from the WNW with a very long 16-second period. The energy reading is huge. This is a serious groundswell, deep ocean energy. The wind is light from the north, so it’s clean. The only caveat is that a swell this long can feel a little straight at a beach or exposed reef, but Kilcummin Harbour, being a reef setup, should handle it nicely. This is for experts only – 12 feet is big and powerful. The afternoon holds similar size at 12 feet, 15-second period, though the wind turns cross-onshore from the northwest, so morning is the call. It’s a long way out, so keep an eye on it, but this is the one to circle on the calendar.
After that, Wednesday the 16th drops back to 8 feet, but the wind is cross-shore, making it lumpy. The rest of the week fades into small, weak surf with little energy and tiny waves (2 feet and 2 feet) by Friday the 18th. A long gap of quiet conditions to finish.
Best on offer: Saturday afternoon the 5th for a clean, fun session with offshore wind, and the big one – Tuesday morning the 15th of September – for a powerful, groundswell hit for the experienced crew.
Stay safe, keep your wetsuit zipped, and I’ll see you in the water.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu morning, min 13°C on Thu night). Winds decreasing (strong winds from the WSW on Thu night, light winds from the SW by Fri night). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Sun afternoon. Warm (max 20°C on Sun afternoon, min 12°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 8 | WSW 8 | W 10 | WNW 12 | WNW 12 | WNW 12 | WNW 10 | WNW 9 | WSW 8 | WSW 9 | WSW 10 | W 7 | W 8 | WSW 9 | WNW 9 | WNW 9 | WNW 10 | WNW 9 | WNW 8 | W 7 | WSW 8 |
Wave Graph | |||||||||||||||||||||
291 | 588 | 2040 | 7971 | 5440 | 3253 | 1233 | 688 | 160 | 243 | 295 | 328 | 488 | 202 | 477 | 1229 | 1361 | 631 | 238 | 159 | 270 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-on | glassy | off |
High Tide | 10:16AM2.89m | 10:39PM2.83m | 11:14AM2.71m | 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 | ||||||||
Low Tide | 4:14PM0.72m | 4:44AM0.79m | 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 | ||||||||
6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | |
— | 8:23 | — | — | 8:22 | — | — | 8:19 | — | — | 8:16 | — | — | 8:14 | — | — | 8:12 | — | — | 8:08 | — | |
mm | — | 5 | 1 | — | — | — | — | — | — | — | 1 | — | 1 | 1 | 1 | 1 | — | — | — | — | — |
Temp °C | 17 | 15 | 14 | 15 | 15 | 13 | 14 | 15 | 15 | 18 | 20 | 15 | 15 | 14 | 13 | 14 | 14 | 13 | 14 | 15 | 13 |
Feels °C | 12 | 11 | 9 | 7 | 8 | 9 | 11 | 10 | 11 | 13 | 16 | 9 | 9 | 10 | 7 | 7 | 7 | 7 | 10 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | N 11 | N 10 | N 10 | N 9 | — | WNW 12 | WNW 10 | WNW 9 | WSW 8 | WSW 9 | WSW 10 | N 10 | WSW 12 | NW 7 | WNW 9 | N 9 | — | N 7 | WNW 8 | NNW 8 | WSW 8 |
220 | 131 | 46 | 15 | — | 3253 | 1233 | 688 | 160 | 243 | 295 | 2 | 161 | 193 | 477 | 6 | — | 123 | 238 | 117 | 270 | |
Swell 2 Height (m) Direction Period (s) | W 15 | W 17 | — | — | — | — | — | N 8 | WNW 9 | NW 8 | NNW 8 | N 10 | N 9 | WSW 9 | N 9 | — | — | — | N 9 | N 9 | NNW 8 |
4 | 6 | — | — | — | — | — | 29 | 111 | 15 | 6 | 2 | 2 | 202 | 1 | — | — | — | 129 | 109 | 44 | |
Swell 3 Height (m) Direction Period (s) | W 18 | — | — | — | — | — | — | W 14 | NW 8 | — | N 9 | — | — | WSW 11 | — | — | — | — | NW 8 | N 10 | N 9 |
6 | — | — | — | — | — | — | 4 | 33 | — | 2 | — | — | 73 | — | — | — | — | 57 | 90 | 40 | |
Wind waves Height (m) Direction Period (s) | W 8 | WSW 8 | W 10 | WNW 12 | WNW 12 | — | — | S 3 | SSE 4 | SSE 4 | SSW 4 | W 7 | W 8 | — | — | WNW 9 | WNW 10 | WNW 9 | — | W 7 | S 4 |
291 | 588 | 2040 | 7971 | 5440 | — | — | 5 | 16 | 47 | 29 | 328 | 488 | — | — | 1229 | 1361 | 631 | — | 159 | 28 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 233 | 283 | 575 | 730 | 233 | 2 | 0 | 10 | 233 | 550 | 233 | 194 | 2 | 285 | 283 | 730 | 297 | 233 | 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.










