Surf Forecasts:
Kilcummin Harbour surf forecast from 5 Aug 2026:
- Best quality surf: Friday 7 Aug, 10PM (local time) - 7ft (2.1m), 10s period, WNW swell with offshore winds.
- Most powerful swell: Sunday 9 Aug, 7AM (local time) - 7ft (2.2m), 10s period, WNW swell with 970 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 7AM (local time) - 4.5ft (1.4m), 8s 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 Thursday (Aug 06) at 7AM. The primary swell is predicted to be 1.4m and 8s period with a secondary swell of 0.3m and 10s. Another secondary swell of 0.6m and 6s is also forecast. 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 2.2m 10s and forecast to arrive on Sunday (Aug 09) at 7AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Friday (Aug 07) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 6th Aug) | 4.5ft (1.4m) 8s |
| Best Surf | 10PM (Fri 7th Aug) | 7ft (2.1m) 10s |
| Most Powerful | 7AM (Sun 9th Aug) | 7ft (2.2m) 10s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, let's break down what's coming your way. The first few days are a bit of a write-off, but there's some real standouts later on.
The first half-decent chance is Thursday, the 6th of August. You've got a small 4ft swell from the north, but the wind turns clean. Kilcummin Harbour is a reef, and with a gentle cross-off breeze, it'll be tidy enough for a session. The water temp is 61°F, which is a touch warmer than usual for this time of year, so you might get away with a thinner suit. The combined energy is weak (175), so no power, but it's a start.
Friday, the 7th, the swell builds, but it's still marginal. The morning's 5ft from the west picks up to 7ft in the afternoon from the west-northwest, with moderate cross-off winds. The energy is getting better (315 to 796), but it's not quite right.
The real action starts Saturday, the 8th of August. The morning is clean with a 6ft west-northwest swell and a gentle cross-off breeze. The afternoon is where it gets good: 6ft of the same swell, clean conditions, and the energy is building (657). This is surfable, and it's looking like a solid session.
Sunday, the 9th, is the standout of the first week. The morning is the pick of the bunch: 7ft from the west-northwest, a light cross-off wind, and the combined energy is a solid 913. This is proper, clean, and punchy. The afternoon drops off a little with the wind, but the morning is the one to chase.
After a bit of a lull, Monday, the 10th of August, brings a nice change. A 5ft northerly swell rolls in with a 12-second period, which is a long-period groundswell. The wind is light and cross-off, and the energy is still strong (789). This is the kind of clean, lined-up reef set-up that should be a treat.
Looking further ahead, the second week has a few promising days. Thursday, the 13th of August, is one to watch. The afternoon shows a beast of a 13ft swell from the west, with a 10-second period. The energy is massive (3297), but the wind is a fresh cross-shore, which makes it tricky. This is for experienced surfers only. Friday, the 14th, is blown out.
The real hidden gem is Saturday, the 15th of August. The afternoon is perfect: 4ft from the west, and the wind goes glassy. The energy is moderate (266), but when it's glassy, this reef will be smooth and fun. Sunday, the 16th, morning is also glassy with a similar 4ft swell. This is the best bet for the long-range.
So, if you're looking for the best waves, chase the sessions on Sunday, the 9th of August, and the glassy windows on Saturday and Sunday, the 15th and 16th. The 13ft on Thursday the 13th is for the brave only.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Fri night. Very mild (max 17°C on Fri morning, min 13°C on Wed morning). Winds decreasing (fresh winds from the NW on Wed morning, light winds from the WSW by Wed night). | Days 4-6 Weather SummarySome drizzle, heaviest during Mon night. Very mild (max 19°C on Sun morning, min 14°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
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) | NNW 9 | NNW 9 | N 8 | N 8 | N 7 | W 5 | W 8 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 10 | WNW 9 | WNW 9 | N 12 | N 11 | N 10 | N 10 | N 9 | WSW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1615 | 1221 | 363 | 137 | 65 | 53 | 294 | 795 | 655 | 484 | 653 | 659 | 906 | 721 | 453 | 546 | 459 | 282 | 149 | 81 | 109 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | on | cross-off | off | off | off |
High Tide | 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 | 4:15AM2.77m | 4:44PM3.18m | 5:15AM2.96m | 5:37PM3.50m | ||||||||
Low Tide | 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 | 10:19AM0.66m | 11:03PM0.45m | 11:12AM0.43m | 11:55PM0.18m | ||||||||
 |  |  |  |  | | | |  | | | | |  | | | |  | | |  | |
 | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — |
 | — | — | 9:29 | — | — | 9:27 | — | — | 9:24 | — | — | 9:22 | — | — | 9:21 | — | — | 9:19 | — | — | 9:16 |
mm | 3 | 1 | — | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 14 | 14 | 13 | 16 | 16 | 14 | 17 | 17 | 15 | 18 | 18 | 16 | 19 | 19 | 15 | 18 | 17 | 16 | 19 | 22 | 20 |
Feels °C | 8 | 7 | 8 | 12 | 11 | 11 | 12 | 12 | 13 | 17 | 15 | 14 | 17 | 15 | 13 | 17 | 16 | 15 | 15 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | — | — | N 8 | N 8 | N 7 | N 7 | W 9 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | N 10 | WNW 10 | N 9 | WNW 9 | N 12 | N 11 | N 10 | N 10 | N 9 | WSW 10 |
| kJ | — | — | 363 | 137 | 65 | 14 | 15 | 795 | 655 | 484 | 653 | 8 | 906 | 6 | 453 | 546 | 459 | 282 | 149 | 81 | 109 |
Swell 2 Height (m) Direction Period (s) | — | — | W 10 | W 10 | W 10 | W 9 | N 6 | N 7 | N 11 | SE 4 | N 11 | — | N 9 | N 9 | N 9 | WNW 8 | NW 9 | NW 8 | NW 8 | NW 8 | N 9 |
| kJ | — | — | 18 | 17 | 30 | 16 | 3 | 1 | 2 | 1 | 2 | — | 7 | 6 | 14 | 243 | 123 | 68 | 54 | 38 | 38 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | NW 6 | NW 9 | N 6 | — | — | N 10 | N 10 | — | — | — | N 15 | — | W 8 | W 7 | W 9 | WSW 8 | NW 8 |
| kJ | — | — | — | — | 8 | 3 | 3 | — | — | 2 | 2 | — | — | — | 4 | — | 41 | 25 | 14 | 14 | 14 |
Wind waves Height (m) Direction Period (s) | NNW 9 | NNW 9 | WNW 6 | WNW 5 | W 5 | W 5 | W 8 | — | — | S 3 | — | WNW 9 | — | WNW 9 | — | — | — | — | SE 3 | SE 3 | SSE 3 |
| kJ | 1615 | 1221 | 118 | 21 | 21 | 53 | 294 | — | — | 6 | — | 659 | — | 721 | — | — | — | — | 9 | 4 | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 531 | 549 | 730 | 0 | 245 | 11 | 2 | 174 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 52 | 0 | 0 | 11 | 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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