Surf Forecasts:
Kilcummin Harbour surf forecast from 4 Aug 2026:
- Best quality surf: Sunday 9 Aug, 7AM (local time) - 7.5ft (2.3m), 10s period, WNW swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 4PM (local time) - 13ft (4.0m), 10s period, NW swell with 3,146 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 4AM (local time) - 3.5ft (1.1m), 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 4AM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.1m 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 4.0m 10s and forecast to arrive on Wednesday (Aug 05) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Tuesday (Aug 04) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 4th Aug) | 3.5ft (1.1m) 9s |
| Best Surf | 7AM (Sun 9th Aug) | 7.5ft (2.3m) 10s |
| Most Powerful | 4PM (Wed 5th Aug) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Grab your wettie and listen up. Rusty here with the long-range look at Kilcummin Harbour.
The next couple of days are a bit of a write-off, but don't lose hope. The pattern is shaping up for a solid pulse of west-northwest groundswell late in the first week and into the weekend. Water temps are sitting at 61°, which feels a touch warmer than normal for this time of year, so you might get away with a thinner suit.
We’re looking at some fun waves on Saturday the 8th. The morning is the call with a solid 8ft west-northwest swell rolling in. The wind is light cross-offshore from the southwest, keeping things clean. The combined energy is strong at 952, so there's plenty of push. This one is solid, more of an intermediate-to-advanced wave with that size.
But the absolute standout is Sunday the 9th. We’ve got a 8ft swell from the west-northwest with a period of 10 seconds, meaning it’s a proper groundswell with good shape. The wind is absolutely glassy, dead calm in the morning, and the combined energy is pumping at 1006. Conditions will be epic. This is an excellent option for experienced surfers looking for clean, powerful waves.
After that, the swell drops off through the second week, with much smaller, weaker energy and mostly cross-off winds. There are some clean-looking days around the 10th and 11th with chest-high swell from the north, but nothing that will blow your hair back. The surf really fades from the 12th through to the 18th, with combined energy dropping into the double digits, leaving only small, weak waves for the most part.
So, lock in Sunday the 9th for your best chance at a proper session.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Mon night. Very mild (max 17°C on Mon afternoon, min 13°C on Tue night). Winds increasing (calm on Tue morning, strong winds from the WNW by Tue night). | Days 5-7 Weather SummarySome drizzle, heaviest during Thu afternoon. Very mild (max 18°C on Sat morning, min 14°C on Thu night). Winds decreasing (fresh winds from the SW on Fri morning, calm by Sun morning). | |||||||||||||||||||
Mon 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
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 8 | N 8 | NW 9 | NW 9 | NW 10 | NNW 9 | N 7 | N 7 | W 6 | W 8 | WNW 9 | W 10 | W 9 | W 9 | WNW 8 | WNW 10 | WNW 9 | NNW 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 129 | 164 | 201 | 196 | 2128 | 2540 | 3146 | 1060 | 186 | 76 | 69 | 316 | 826 | 1158 | 950 | 632 | 504 | 1004 | 817 | 486 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | glassy | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | 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 | 3:47AM0.44m | 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 | ||||||||
 |  | |  |  |  | |  |  | | | | | | | | |  | |  | |
 | — | — | 5:52 | — | — | 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 | 1 | 6 | 2 | 1 | 3 | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 16 | 16 | 15 | 14 | 14 | 14 | 14 | 16 | 16 | 14 | 17 | 17 | 15 | 18 | 18 | 15 | 17 | 18 | 17 |
Feels °C | 15 | 14 | 17 | 12 | 8 | 6 | 7 | 9 | 12 | 12 | 12 | 11 | 11 | 12 | 16 | 16 | 13 | 17 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | N 9 | N 9 | N 8 | N 8 | — | — | — | W 10 | N 7 | N 7 | N 6 | W 8 | N 7 | W 10 | N 10 | N 11 | N 10 | WNW 10 | NNW 14 | NNW 11 |
| kJ | 129 | 164 | 201 | 196 | — | — | — | 18 | 186 | 76 | 20 | 316 | 4 | 1158 | 2 | 2 | 2 | 1004 | 18 | 486 |
Swell 2 Height (m) Direction Period (s) | NW 7 | NW 6 | SW 9 | NW 9 | — | — | — | — | W 10 | W 10 | W 7 | W 9 | — | — | — | N 10 | N 10 | N 9 | N 8 | — |
| kJ | 11 | 6 | 3 | 86 | — | — | — | — | 30 | 17 | 16 | 16 | — | — | — | 2 | 2 | 2 | 1 | — |
Swell 3 Height (m) Direction Period (s) | WSW 9 | W 10 | W 11 | W 11 | — | — | — | — | — | — | W 10 | N 6 | — | — | — | — | — | — | — | — |
| kJ | 8 | 2 | 2 | 9 | — | — | — | — | — | — | 16 | 7 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ENE 4 | ESE 2 | SSE 2 | NW 4 | NW 9 | NW 9 | NW 10 | NNW 9 | WNW 6 | WNW 6 | W 6 | — | WNW 9 | — | W 9 | W 9 | WNW 8 | — | WNW 9 | WNW 9 |
| kJ | 13 | 1 | 1 | 11 | 2128 | 2540 | 3146 | 1060 | 48 | 42 | 69 | — | 826 | — | 950 | 632 | 504 | — | 817 | 411 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 10 | 0 | 0 | 148 | 148 | 281 | 561 | 420 | 235 | 467 | 11 | 174 | 194 | 2 | 0 | 31 | 0 | 0 | 55 | 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.
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