
Surf Forecasts:
Kilcummin Harbour surf forecast from 3 Aug 2026:
- Best quality surf: Sunday 9 Aug, 7AM (local time) - 8ft (2.5m), 10s period, WNW swell with glassy winds.
- Most powerful swell: Wednesday 5 Aug, 7AM (local time) - 15ft (4.5m), 10s period, NW swell with 4,018 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 1AM (local time) - 3.5ft (1.0m), 9s period with N 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 Tuesday (Aug 04) at 1AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.2m and 6s. 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 4.5m 10s and forecast to arrive on Wednesday (Aug 05) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Aug 07) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Tue 4th Aug) | 3.5ft (1.0m) 9s |
| Best Surf | 7AM (Sun 9th Aug) | 8ft (2.5m) 10s |
| Most Powerful | 7AM (Wed 5th Aug) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming up for Kilcummin Harbour.
First thing to note – the water’s sitting at 61°F right now, which is a touch warmer than normal for this time of year. Not a big deal, but worth knowing if you're used to a chillier paddle.
The next week and a half is a bit of a mixed bag. We’ve got some small, clean windows early on, but the real standout is without a doubt Sunday, the 9th of August. That morning, we’re looking at a solid 10ft swell from the NW, with a period of 10 seconds – that’s proper groundswell, plenty of energy behind it. The combined energy is a hefty 1539, so there’s serious power in the water. And the wind? Glassy. Absolutely dead calm. That’s a rare combo, and it’ll mean clean, lined-up waves. This is for experienced surfers only – at 10ft, it’s too big for beginners. The swell direction is NNW, which is right in the sweet spot for this reef. Expect some real quality.
The afternoon holds a slightly smaller 8ft, still glassy, still excellent. This is the best on offer, no question.
Before that, we have a few smaller opportunities. Tuesday the 4th of August morning sees a clean 4ft from the N with a light cross-offshore breeze. Not big, but surfable. Wednesday the 5th is a write-off – strong winds and a messy 15ft+ swell that’s just too blown out. Kite surfers might enjoy it, but for a paddle surfer, it’s a no-go.
Thursday the 6th morning is worth a mention – clean again, 4ft from the N, and a gentle breeze. It’s small, but the conditions are clean. Friday the 7th and Saturday the 8th have some size (5ft to 7ft) with clean winds, but the surf quality is described as marginal – likely due to tide or shape issues.
After the 9th, things drop off. Monday the 10th morning has a clean 5ft from the N, but the afternoon turns onshore and messy. The rest of the week into the second week is mostly small, weak, and not worth the drive. From the 11th through to the 14th, we’re looking at tiny waves under 3ft with very low energy (23 to 145). There’s a brief uptick around the 15th and 16th with some 4ft to 6ft swell, but the wind is cross-shore and choppy, and the surf quality is poor. It’s not until the 18th that we see another 7ft swell, but again, it’s marginal.
So, the honest take: Sunday the 9th of August is the one to circle. The morning glass-off and that solid NW groundswell at Kilcummin Harbour will be something special. Everything else is either too small, too windy, or too average. The gap after the 9th is a long, quiet stretch – nearly a week of barely anything rideable. But that one day? That’s the kind of session you remember.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Tue night. Very mild (max 18°C on Tue morning, min 13°C on Tue night). Winds increasing (light winds from the SSW on Tue morning, strong winds from the WNW by Tue night). | Days 4-6 Weather SummarySome drizzle, heaviest during Thu afternoon. Very mild (max 18°C on Fri afternoon, min 13°C on Thu night). Winds decreasing (fresh winds from the SW on Fri afternoon, calm by Sat night). | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 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) | N 9 | N 9 | N 9 | N 9 | N 8 | NW 9 | NW 10 | NW 10 | NW 8 | N 7 | WNW 6 | W 7 | WNW 8 | WNW 9 | W 9 | W 9 | W 8 | WNW 8 | NW 10 | NW 10 | NW 9 |
Wave Graph | |||||||||||||||||||||
102 | 129 | 164 | 184 | 245 | 1566 | 3599 | 2944 | 767 | 123 | 45 | 107 | 376 | 736 | 885 | 758 | 472 | 463 | 1539 | 1254 | 586 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | glassy | glassy | glassy |
High Tide | 9:35PM3.31m | 10:00AM2.84m | 10:14PM3.15m | 10:46AM2.74m | 11:02PM2.95m | 11:42AM2.63m | 00:04AM2.74m | 12:54PM2.57m | 1:26AM2.61m | 2:20PM2.64m | 2:57AM2.62m | 3:40PM2.86m | |||||||||
Low Tide | 3:09PM0.48m | 3:47AM0.44m | 3:48PM0.62m | 4:28AM0.56m | 4:35PM0.79m | 5:18AM0.72m | 5:36PM0.95m | 6:23AM0.88m | 7:00PM1.06m | 7:48AM0.94m | 8:38PM0.99m | 9:12AM0.86m | 10:00PM0.75m | ||||||||
5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | |
— | — | 9:32 | — | — | 9:30 | — | — | 9:29 | — | — | 9:27 | — | — | 9:24 | — | — | 9:22 | — | — | 9:21 | |
mm | — | — | 4 | 1 | 1 | 5 | — | — | — | — | 1 | — | — | — | — | — | — | — | 3 | 6 | — |
Temp °C | 14 | 17 | 16 | 18 | 16 | 14 | 14 | 14 | 14 | 15 | 16 | 14 | 17 | 18 | 16 | 15 | 16 | 14 | 15 | 15 | 16 |
Feels °C | 12 | 15 | 14 | 18 | 13 | 9 | 6 | 7 | 9 | 11 | 13 | 12 | 12 | 12 | 12 | 12 | 14 | 13 | 15 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | N 9 | N 9 | N 9 | N 9 | N 8 | — | — | — | — | N 7 | N 7 | W 7 | WNW 8 | WNW 9 | W 9 | N 10 | N 10 | N 9 | — | — | NW 9 |
102 | 129 | 164 | 184 | 245 | — | — | — | — | 123 | 43 | 107 | 376 | 736 | 885 | 2 | 2 | 7 | — | — | 586 | |
Swell 2 Height (m) Direction Period (s) | NW 7 | NW 7 | NNW 6 | ESE 3 | W 11 | — | — | — | — | W 10 | W 10 | N 6 | N 7 | N 7 | N 11 | N 11 | N 10 | N 9 | — | — | — |
17 | 11 | 4 | 1 | 9 | — | — | — | — | 30 | 17 | 12 | 4 | 1 | 2 | 2 | 2 | 2 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SW 9 | WSW 9 | SW 8 | W 9 | W 7 | — | — | — | — | — | — | NW 9 | W 9 | — | — | — | — | — | — | — | — |
22 | 8 | 3 | 2 | 1 | — | — | — | — | — | — | 20 | 6 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | ENE 3 | E 4 | ESE 3 | — | NW 3 | NW 9 | NW 10 | NW 10 | NW 8 | WNW 6 | WNW 6 | SW 3 | SSW 3 | — | — | W 9 | W 8 | WNW 8 | NW 10 | NW 10 | — |
6 | 9 | 2 | — | 5 | 1566 | 3599 | 2944 | 767 | 52 | 45 | 3 | 5 | — | — | 758 | 472 | 463 | 1539 | 1254 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 11 | 0 | 0 | 117 | 148 | 235 | 550 | 473 | 0 | 171 | 0 | 2 | 185 | 31 | 2 | 233 | 0 | 0 | 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.











