Surf Forecasts:
Kilcummin Harbour surf forecast from 17 Jul 2026:
- Most powerful swell: Friday 24 Jul, 7AM (local time) - 8ft (2.4m), 10s period, WNW swell with 1,057 kJ wave energy.
Best Forecast Surf Conditions for Kilcummin Harbour this week:
The most powerful waves expected at Kilcummin Harbour in the next 16 days are 2.4m 10s and forecast to arrive on Friday (Jul 24) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Fri 24th Jul) | 8ft (2.4m) 10s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright folks, Rusty here. We’ve got a full 16-day window for this spot, but it’s gonna be a real slow burn before we see anything worthwhile. Get ready for a long wait.
The first week is a write-off, I’m not gonna sugarcoat it. From Friday the 17th right through to Sunday the 23rd, we’ve got persistent onshore winds and weak, short-period windswell. The wave energy is low, and the conditions are consistently labeled as poor. You’ll be looking at bumpy, choppy lines with no real power. The wind is hammering from the north and northwest, staying on it like a dog with a bone. Just leave the board in the shed.
Things start to get a bit more interesting around the 24th of July. The swell picks up, but it’s a messy affair. The wind, swinging from the west and WNW, is still cross-shore, making for lumpy, cross-chop conditions. The waves hit 8ft on Friday the 24th, but the energy is there for the wrong reasons – it’s messy and blown out. This is strictly for the die-hard crew or perhaps the kite surfers, as the beach-and-reef setup looks more like a wind sport zone than a paddle session.
The real standout, the one you’ve been waiting for, arrives on Tuesday the 28th of July. This is the cream of the crop. We’ve got a solid 7ft of WNW groundswell with a gorgeous 10-second period, and the wind... the wind drops to nothing. Glass-off. The wave state is described as "glassy" – that’s the magic word. For a spot like Kilcummin Harbour, which is a reef break exposed to the optimum northwest swell direction, this is about as clean as it gets. This is the one to clear your diary for. The morning of the 29th (Wednesday) also looks promising with a clean 4ft NW swell, but Tuesday is the king.
The rest of the second week is a bit of a mixed bag. The 27th July (Monday) offers a clean 7ft swell with a cross-offshore wind, which is good, but Tuesday is the main event. After that, the swell sticks around in the 5ft to 6ft range, but the wind picks up again, making it a bit more of a gamble. The water temperature will be about average for this time of year.
Remember, this is a reef break that’s fairly consistent, and with the offshore wind direction being from the south, you can get some really clean lines. But for the love of all things holy, don’t get excited about the first week. It’s all about that Tuesday the 28th of July.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Thu night, min 12°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 14°C on Tue afternoon, min 12°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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) | N 5 | N 6 | N 6 | N 6 | N 6 | NNW 7 | NNW 7 | NNW 7 | W 11 | W 11 | W 10 | W 10 | W 10 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NW 6 | WNW 6 | NW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 76 | 144 | 124 | 91 | 108 | 163 | 105 | 64 | 61 | 82 | 78 | 69 | 53 | 48 | 43 | 52 | 55 | 47 | 75 | 124 | 719 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | on | on | cross-on | cross | cross | cross-off |
High Tide | 8:37AM3.14m | 8:55PM3.83m | 9:22AM3.02m | 9:39PM3.65m | 10:07AM2.88m | 10:24PM3.39m | 10:54AM2.73m | 11:10PM3.07m | 11:44AM2.59m | 00:01AM2.76m | 12:41PM2.49m | 1:02AM2.51m | 1:49PM2.44m | 2:15AM2.38m | |||||||
Low Tide | 2:23PM0.15m | 3:13AM0.11m | 3:07PM0.29m | 3:57AM0.29m | 3:52PM0.48m | 4:42AM0.50m | 4:40PM0.72m | 5:28AM0.73m | 5:34PM0.95m | 6:21AM0.94m | 6:41PM1.14m | 7:23AM1.08m | 8:03PM1.23m | ||||||||
 |  |  |  | |  | | | | | | | | |  | | | | | | | |
 | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — |
 | — | — | 10:00 | — | — | 9:59 | — | — | 9:58 | — | — | 9:55 | — | — | 9:54 | — | — | 9:52 | — | — | 9:52 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 12 | 13 | 13 | 14 | 14 | 13 | 13 | 13 | 12 | 13 | 14 | 14 | 13 | 13 | 13 | 16 | 17 | 15 |
Feels °C | 9 | 9 | 9 | 7 | 8 | 10 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 11 | 12 | 10 | 10 | 10 | 12 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | W 8 | NW 9 | WNW 8 | NW 8 | NW 7 | WNW 9 | NNW 7 | WNW 12 | W 11 | W 11 | W 10 | W 10 | W 10 | W 9 | W 9 | W 9 | W 9 | W 8 | — | W 14 | WNW 12 |
| kJ | 21 | 43 | 45 | 28 | 33 | 8 | 105 | 47 | 61 | 82 | 78 | 69 | 46 | 41 | 28 | 26 | 25 | 23 | — | 4 | 29 |
Swell 2 Height (m) Direction Period (s) | NW 10 | W 8 | W 8 | W 8 | W 7 | W 7 | W 9 | W 8 | W 19 | — | N 8 | W 18 | — | — | W 16 | — | — | — | — | — | — |
| kJ | 26 | 12 | 11 | 10 | 4 | 4 | 13 | 13 | 7 | — | 1 | 6 | — | — | 5 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 14 | W 13 | — | — | W 10 | W 13 | WNW 12 | — | — | — | W 8 | — | — | — | — | — | — | — | — | — | — |
| kJ | 4 | 4 | — | — | 2 | 4 | 29 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 5 | N 6 | N 6 | N 6 | N 6 | NNW 7 | — | NNW 7 | NNW 6 | NNW 4 | NNW 5 | NNW 6 | NNW 6 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NW 6 | WNW 6 | NW 9 |
| kJ | 76 | 144 | 124 | 91 | 108 | 163 | — | 64 | 40 | 25 | 39 | 66 | 53 | 48 | 43 | 52 | 55 | 47 | 75 | 124 | 719 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 297 | 550 | 151 | 451 | 450 | 55 | 55 | 148 | 55 | 201 | 151 | 201 | 201 | 1203 | 151 | 1069 | 1146 | 174 | 489 | 506 | 572 |
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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