Surf Forecasts:
Kilcummin Harbour surf forecast from 19 Aug 2026:
- Best quality surf: Monday 24 Aug, 7AM (local time) - 5.5ft (1.7m), 11s period, WNW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 7AM (local time) - 10ft (3.0m), 9s period, N swell with 1,243 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 10PM (local time) - 2ft (0.6m), 10s period with NW 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 Sunday (Aug 23) at 10PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.8m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kilcummin Harbour in the next 16 days are 3.0m 9s and forecast to arrive on Thursday (Aug 20) at 7AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 25) at 1PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 23rd Aug) | 2ft (0.6m) 10s |
| Best Surf | 7AM (Mon 24th Aug) | 5.5ft (1.7m) 11s |
| Most Powerful | 7AM (Thu 20th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let’s talk about what’s coming up for Kilcummin Harbour.
Right off the bat, we’ve got a bit of a rough patch. The first few days are looking pretty grim. Wednesday the 19th brings some rain and a messy 8ft swell from the WNW, but a strong cross-off wind is ruining any chance of quality. The energy is solid at 1116, but it’s a miss. Conditions just get worse from there into Thursday and Friday with strong onshore winds and poor surf.
We’re looking at a real quiet spell from Saturday the 22nd right through Sunday the 23rd. The swell drops right off to tiny, weak waves with energy down around 50-90. It’s dead. You’re better off doing something else.
The real standout is Monday the 24th. That’s the day to circle. We’ve got a 7ft swell from the WNW rolling in with a nice 11-second period, giving it some real push. The sweet part is the wind – a light, glassy offshore from the S. The water will be clean, and the wave energy is pumping at 943. This is your best shot. The Tuesday the 25th still has some nice 5ft swell from the WSW with a light offshore, but it’s a step down from the Monday.
After that, things get a bit inconsistent again. A small window on Tuesday the 1st of September shows a 4ft WNW swell with a light cross-off breeze, which is surfable but nothing to write home about. Then into the second week, we get a pulse of serious size on Sunday the 30th of August – an 12ft swell from the W with a 12-second period, giving massive energy (3721). But the wind is a strong cross-onshore, making it a lumpy, messy mess. That’s expert-only territory, and even then, it won’t be pretty. The same goes for Monday the 31st with 8-10ft swells and the same wind problem.
Honestly, if you want a wave, Monday the 24th is the only true standout. The rest of the two weeks is a mix of poor conditions or just ordinary surf. The longer-range stuff on the 30th and 31st is promising in size, but the wind is a killer. We’ll see if the forecast changes.
Keep the faith, and I’ll catch you in the water.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Wed morning. Very mild (max 16°C on Wed morning, min 13°C on Thu night). Winds decreasing (fresh winds from the N on Wed night, light winds from the NNW by Fri night). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon afternoon, min 12°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 10 | WNW 10 | WNW 10 | N 9 | N 8 | N 7 | N 7 | N 6 | N 6 | N 5 | NNW 6 | NNE 9 | NW 7 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | WSW 10 | WSW 9 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1219 | 959 | 939 | 993 | 555 | 330 | 229 | 188 | 82 | 28 | 51 | 28 | 36 | 63 | 284 | 732 | 726 | 482 | 335 | 143 | 187 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | on | on | on | on | on | on | on | on | on | cross | cross-off | cross-on | off | off | off | glassy | cross-off | cross-on | cross-on |
High Tide | 10:47AM2.70m | 11:07PM2.61m | 11:38AM2.50m | 00:05AM2.33m | 12:49PM2.36m | 1:31AM2.17m | 2:25PM2.35m | 3:09AM2.20m | 3:46PM2.51m | 4:16AM2.35m | 4:40PM2.74m | 5:01AM2.54m | 5:20PM3.00m | ||||||||
Low Tide | 4:45PM0.93m | 5:11AM1.02m | 5:44PM1.18m | 6:11AM1.24m | 7:15PM1.34m | 7:46AM1.33m | 9:03PM1.31m | 9:17AM1.23m | 10:12PM1.13m | 10:15AM1.04m | 10:58PM0.92m | 10:56AM0.81m | 11:34PM0.70m | ||||||||
 | |  |  | |  | | |  | |  |  | | | | | | |  | |  | |
 | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — |
 | — | — | 9:00 | — | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — |
mm | 3 | 2 | 3 | — | 1 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 14 | 14 | 14 | 13 | 13 | 14 | 14 | 15 | 14 | 13 | 16 | 16 | 14 | 17 | 20 | 15 | 17 | 19 | 16 |
Feels °C | 12 | 11 | 11 | 7 | 7 | 7 | 7 | 8 | 9 | 11 | 10 | 11 | 15 | 14 | 14 | 14 | 16 | 14 | 15 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | N 8 | N 8 | WNW 10 | W 10 | W 9 | WNW 8 | W 8 | W 8 | WSW 8 | N 5 | WSW 9 | NW 6 | NW 7 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | WSW 10 | WSW 9 | W 8 |
| kJ | 1 | 1 | 939 | 231 | 173 | 94 | 45 | 28 | 14 | 28 | 15 | 25 | 36 | 63 | 284 | 732 | 726 | 482 | 335 | 143 | 187 |
Swell 2 Height (m) Direction Period (s) | W 17 | W 17 | — | W 16 | W 15 | W 15 | W 17 | W 16 | NNE 9 | WSW 9 | NNE 9 | NNE 9 | WNW 9 | WNW 8 | WSW 9 | N 8 | NE 8 | — | NW 11 | NW 11 | WNW 7 |
| kJ | 6 | 6 | — | 5 | 4 | 4 | 6 | 5 | 15 | 16 | 16 | 28 | 15 | 13 | 16 | 1 | 3 | — | 18 | 18 | 37 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | WNW 7 | NNE 9 | NW 10 | WSW 9 | WSW 9 | WSW 8 | N 8 | W 14 | — | — | N 11 | N 10 | NW 9 |
| kJ | — | — | — | — | — | — | — | — | 5 | 15 | 4 | 16 | 7 | 7 | 1 | 4 | — | — | 2 | 2 | 22 |
Wind waves Height (m) Direction Period (s) | WNW 10 | WNW 10 | N 11 | N 9 | N 8 | N 7 | N 7 | N 6 | N 6 | WNW 6 | NNW 6 | — | — | — | — | — | — | — | SE 4 | SE 4 | — |
| kJ | 1219 | 959 | 233 | 993 | 555 | 330 | 229 | 188 | 82 | 21 | 51 | — | — | — | — | — | — | — | 17 | 15 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 185 | 171 | 244 | 420 | 1072 | 297 | 297 | 300 | 151 | 151 | 276 | 2 | 15 | 171 | 0 | 0 | 0 | 0 | 0 | 10 | 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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