Surf Forecasts:
Kilcummin Harbour surf forecast from 24 Aug 2026:
- Best quality surf: Sunday 30 Aug, 7PM (local time) - 7ft (2.1m), 7s period, NNW swell with offshore winds.
- Most powerful swell: Monday 31 Aug, 7PM (local time) - 11ft (3.5m), 8s period, NW swell with 1,805 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 4AM (local time) - 4.5ft (1.4m), 10s period with W 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 25) 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 3.5m 8s and forecast to arrive on Monday (Aug 31) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 9s period and expected on Sunday (Aug 30) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 25th Aug) | 4.5ft (1.4m) 10s |
| Best Surf | 7PM (Sun 30th Aug) | 7ft (2.1m) 7s |
| Most Powerful | 7PM (Mon 31st Aug) | 11ft (3.5m) 8s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down the only spot on the menu for the next couple weeks, Kilcummin Harbour.
Overall, it’s the same story we always get at this exposed reef: a couple of golden windows, then long stretches of wind trash. The water is sitting at 61°F, which is a touch warmer than normal for late summer. Good for the soul.
The best waves of the whole run kick things off on Monday, August 24th. Morning and afternoon both look solid. You’ve got a clean 5ft of WNW groundswell, with a long 11-second period pushing in, and the wind is cross-off from the SSE. That face is going to be lined up. The combined energy is moderate at 606, but the direction lines up with the optimum NNW. This is the one to circle.
Tuesday the 25th is smaller, but the afternoon is a sleeper. Swell drops to 3ft from the west, but the wind goes glassy from the ESE. The energy is low at 136, but it’ll be clean. Worth a paddle if you’re desperate.
Then the curtain drops. From Wednesday the 26th through to Saturday the 29th, the surf is poor. Onshore winds, weak energy, short periods. A proper dry spell of nearly four days.
Sunday the 30th offers a chance. Morning brings 3ft from the WSW with a moderate offshore SSE wind at 12 mph. It’s clean and the energy climbs back to 282. Good, rideable waves for anyone keen.
Monday the 31st sees the size jump, but it’s messy. Swell hits 8ft from the NW, then 10ft in the afternoon, with energy climbing to 1089. But the wind is cross, the period is short, and it’s lumpy. For experienced crew who know this reef, the morning might offer powerful, if bumpy, waves. It’s getting big for the average surfer.
Another poor run rolls in from Tuesday, September 1st through Wednesday the 2nd. Strong cross-winds and lumpy conditions. On Tuesday morning, you’ve got 6ft of swell but with 19 mph cross-winds and a short period. No thanks.
Thursday, September 3rd is a solid comeback. 5ft from the west, an 8-second period, and a proper offshore SSE breeze at 12 mph. The energy sits at 602, the conditions are clean, and this is a proper window for solid reef waves.
Friday the 4th is back to poor, with 8ft swell and nasty 19 mph cross-winds.
Now, a promise for Saturday, September 5th. The morning looks excellent for the brave. Swell hits 8ft from the west with a 10-second period, the wind is a light cross-off from the SW, and the energy is strong at 1475. This is expert territory. Big, clean, and heavy.
Sunday the 6th and Monday the 7th get blown out by strong winds. Then, Tuesday the 8th of September we see a monster. A 16ft west swell with a very long 16-second period. The energy is an extreme 12951. That’s way too big for this break. Even with good winds, it’s for the insane only. Honestly, that setup looks more interesting for kite surfing than paddle surfing in here.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Tue night. Warm (max 20°C on Mon afternoon, min 12°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Fri night. Very mild (max 17°C on Thu morning, min 12°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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) | WNW 11 | W 10 | W 10 | W 10 | W 9 | W 8 | W 8 | W 7 | WNW 10 | WNW 9 | WNW 9 | N 5 | NNW 6 | NW 6 | NW 6 | NNW 6 | NW 6 | WSW 9 | WSW 9 | W 9 | NNW 8 |
Wave Graph | |||||||||||||||||||||
597 | 573 | 400 | 220 | 127 | 66 | 34 | 27 | 154 | 138 | 80 | 74 | 141 | 157 | 101 | 71 | 34 | 44 | 162 | 173 | 383 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | cross-off | cross | cross-on | cross-on | on | on | cross-on | cross-on | off | cross-off | off | cross-off | off | off | cross |
High Tide | 4:40PM2.74m | 5:01AM2.54m | 5:20PM3.00m | 5:37AM2.73m | 5:53PM3.23m | 6:10AM2.90m | 6:24PM3.43m | 6:42AM3.05m | 6:55PM3.57m | 7:13AM3.15m | 7:25PM3.64m | 7:45AM3.21m | 7:56PM3.62m | ||||||||
Low Tide | 10:15AM1.04m | 10:58PM0.92m | 10:56AM0.81m | 11:34PM0.70m | 11:31AM0.60m | 00:07AM0.49m | 12:03PM0.42m | 00:37AM0.31m | 12:34PM0.29m | 1:06AM0.18m | 1:05PM0.21m | 1:36AM0.10m | 1:36PM0.19m | 2:06AM0.10m | |||||||
6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | |
— | 8:47 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:36 | — | — | 8:34 | — | |
mm | — | — | — | — | — | 10 | — | — | — | — | — | 1 | — | — | 3 | 3 | 1 | — | 5 | 4 | 1 |
Temp °C | 17 | 20 | 18 | 18 | 18 | 16 | 16 | 17 | 16 | 17 | 17 | 16 | 16 | 16 | 14 | 14 | 16 | 14 | 16 | 16 | 14 |
Feels °C | 14 | 17 | 15 | 15 | 17 | 13 | 15 | 16 | 15 | 16 | 16 | 14 | 13 | 14 | 13 | 12 | 15 | 12 | 13 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | WNW 11 | W 10 | W 10 | W 10 | W 9 | W 8 | W 8 | W 7 | WNW 10 | WNW 9 | WNW 9 | W 8 | N 9 | N 9 | NW 6 | NNW 6 | NW 6 | WSW 9 | WSW 9 | W 9 | W 9 |
597 | 573 | 400 | 220 | 127 | 66 | 29 | 27 | 154 | 138 | 80 | 33 | 2 | 1 | 101 | 71 | 34 | 44 | 162 | 160 | 168 | |
Swell 2 Height (m) Direction Period (s) | WSW 9 | W 14 | — | — | WNW 8 | WNW 8 | WNW 7 | WNW 11 | NNE 5 | N 6 | NW 11 | NW 10 | — | — | — | — | N 6 | NW 7 | N 8 | W 9 | — |
8 | 4 | — | — | 7 | 6 | 5 | 23 | 9 | 15 | 5 | 4 | — | — | — | — | 12 | 21 | 113 | 130 | — | |
Swell 3 Height (m) Direction Period (s) | N 8 | — | — | — | — | — | W 12 | NW 7 | — | N 12 | N 9 | — | — | — | — | — | W 7 | N 6 | NW 6 | — | — |
1 | — | — | — | — | — | 3 | 2 | — | 3 | 2 | — | — | — | — | — | 3 | 12 | 7 | — | — | |
Wind waves Height (m) Direction Period (s) | SE 3 | NE 8 | — | E 3 | E 3 | ENE 3 | ENE 4 | NE 4 | — | — | N 6 | N 5 | NNW 6 | NW 6 | — | — | — | SSE 3 | SSE 3 | N 8 | NNW 8 |
2 | 2 | — | 5 | 2 | 1 | 34 | 24 | — | — | 15 | 74 | 141 | 157 | — | — | — | 3 | 3 | 173 | 383 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 10 | 10 | 0 | 11 | 11 | 52 | 37 | 37 | 55 | 39 | 130 | 450 | 0 | 10 | 15 | 0 | 0 | 0 | 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.











