Surf Forecasts:
Kilcummin Harbour surf forecast from 21 Jul 2026:
- Best quality surf: Friday 24 Jul, 4AM (local time) - 4.5ft (1.4m), 10s period, WNW swell with cross-offshore winds.
- Most powerful swell: Saturday 25 Jul, 1PM (local time) - 8ft (2.5m), 10s period, WNW swell with 1,135 kJ wave energy.
- Next surfable swell (1★+): Friday 24 Jul, 4AM (local time) - 4.5ft (1.4m), 10s 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 (Jul 24) at 4AM. The primary swell is predicted to be 1.4m and 10s period. 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 2.5m 10s and forecast to arrive on Saturday (Jul 25) at 1PM. 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+) | 4AM (Fri 24th Jul) | 4.5ft (1.4m) 10s |
| Best Surf | 4AM (Fri 24th Jul) | 4.5ft (1.4m) 10s |
| Most Powerful | 1PM (Sat 25th Jul) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, grab a coffee, let’s talk surf. Rusty here. Honestly, the next 16 days are a tale of two halves: a big, blank early run, followed by a couple of punchy days, then a fizzle.
We start on Tuesday, 21st July, and for the first three days it’s a complete bust. Onshore winds blowing 15–16 mph, no decent swell – it’s a total write-off.
Things change on Friday, 24th July. A new WNW swell pushes to about 5 feet with a 9-second period at Kilcummin Harbour (Kilcummin-Harbour) . The combined energy hits 336, which is moderate but feels solid for a reef. The wind is a clean cross-offshore from the west, so the waves will look good. It’s still marginal due to tide, but it’s the first real chance to get wet.
But the standout window opens on Saturday, 25th July. The swell peaks at a solid 8 feet out of the WNW, with a 9-second period and strong energy of 1020. That’s powerful water. The wind is a cross-shore westerly, which should line up the sets. At 8 feet, this is expert territory—definitely not for the faint of heart. If you’re after punch, Saturday is your day.
Sunday, 26th July, still has 8-foot sets, but a fresh 19 mph cross-onshore wind ruins it, making everything lumpy.
We get a second chance on Monday, 27th July. The swell is still a solid 7 feet with a longer 10-second period (energy 1067) and the wind swings to a clean cross-offshore from the WSW. That’s a great combo – a decent, powerful groundswell with clean conditions. It’s a marginal call due to tide, but the morning session could be really special.
After that, things fade quickly. Tuesday, 28th July, drops to 5 feet with a 30 km/h wind that’s just too strong for the smaller swell.
From Thursday, 30th July through the first week of August, the surf vanishes. We’re talking 1–3 foot leftovers with very low energy (values under 100) and mostly onshore winds. On Monday, 3rd August, the wind goes glassy, but with only 2 feet of swell, it’s flat.
The final day, Wednesday, 5th August, morning has surfable but very ordinary 2-foot waves with a light offshore, but nothing to write home about.
Water temp on the 21st is 63°F , which is 4° warmer than normal for this time of year. So expect a warm bath.
In short, Saturday the 25th and Monday the 27th are your real targets. Everything else is either small or blown out. Stay sharp.
Rusty
Short Range ForecastMostly dry. Very mild (max 15°C on Thu morning, min 12°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Fri night. Very mild (max 18°C on Fri morning, min 13°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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 6 | N 6 | NNW 6 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | W 8 | WNW 10 | WNW 9 | WNW 8 | WNW 8 | WNW 9 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 10 | WNW 10 | WNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 85 | 88 | 92 | 99 | 82 | 47 | 34 | 22 | 141 | 336 | 287 | 306 | 1020 | 1102 | 832 | 913 | 878 | 1004 | 942 | 832 | 528 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross-off | cross | cross-off | cross | cross | cross | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 11:44AM2.59m | 00:01AM2.76m | 12:41PM2.49m | 1:02AM2.51m | 1:49PM2.44m | 2:15AM2.38m | 3:03PM2.48m | 3:30AM2.37m | 4:07PM2.60m | 4:31AM2.46m | 4:59PM2.78m | 5:18AM2.59m | 5:41PM2.97m | ||||||||
Low Tide | 5:34PM0.95m | 6:21AM0.94m | 6:41PM1.14m | 7:23AM1.08m | 8:03PM1.23m | 8:34AM1.13m | 9:22PM1.18m | 9:39AM1.07m | 10:24PM1.06m | 10:32AM0.94m | 11:12PM0.90m | 11:15AM0.78m | 11:52PM0.74m | ||||||||
 |  |  | | |  |  | | | | |  | | |  | | | |  | | | |
 | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — | 5:39 | — | — |
 | — | — | 9:54 | — | — | 9:52 | — | — | 9:52 | — | — | 9:50 | — | — | 9:49 | — | — | 9:46 | — | — | 9:45 |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 3 | 3 | — |
Temp °C | 12 | 12 | 12 | 14 | 14 | 14 | 15 | 15 | 13 | 18 | 18 | 14 | 16 | 16 | 15 | 15 | 15 | 15 | 16 | 16 | 16 |
Feels °C | 8 | 8 | 8 | 12 | 12 | 13 | 14 | 13 | 11 | 14 | 14 | 11 | 13 | 13 | 12 | 10 | 10 | 11 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 9 | W 9 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | WNW 10 | — | — | — | — | WNW 10 | WNW 10 | — | N 9 | N 9 | WNW 10 | WNW 10 | WNW 9 |
| kJ | 47 | 42 | 27 | 99 | 82 | 47 | 34 | 20 | 141 | — | — | — | — | 1102 | 832 | — | 6 | 39 | 942 | 832 | 528 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 9 | W 9 | W 9 | W 8 | W 8 | NW 6 | — | — | — | — | — | — | — | — | — | N 10 | N 10 | N 10 |
| kJ | — | — | — | 26 | 25 | 13 | 22 | 22 | 46 | — | — | — | — | — | — | — | — | — | 125 | 123 | 90 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 8 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 12 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 6 | N 6 | NNW 6 | — | — | — | — | — | — | WNW 9 | WNW 8 | WNW 8 | WNW 9 | — | — | WNW 9 | WNW 9 | WNW 9 | — | — | — |
| kJ | 85 | 88 | 92 | — | — | — | — | — | — | 336 | 287 | 306 | 1020 | — | — | 913 | 878 | 1004 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 251 | 1203 | 376 | 55 | 1063 | 171 | 171 | 524 | 2 | 1032 | 610 | 610 | 233 | 70 | 451 | 451 | 497 | 2 | 2 | 2 | 2 |
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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