
Surf Forecasts:
Kilcummin Harbour surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 10PM (local time) - 3ft (0.9m), 11s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 7AM (local time) - 5ft (1.6m), 9s period, W swell with 399 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 4PM (local time) - 2.5ft (0.7m), 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 11) at 4PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.4m and 7s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Kilcummin Harbour in the next 16 days are 1.6m 9s and forecast to arrive on Monday (Aug 17) 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 0.7m 3s period and expected on Monday (Aug 17) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Tue 11th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 10PM (Tue 11th Aug) | 3ft (0.9m) 11s |
| Most Powerful | 7AM (Mon 17th Aug) | 5ft (1.6m) 9s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Right, folks, Rusty here. Let’s have a look at Kilcummin Harbour for the next couple of weeks.
The start of this stretch looks a bit flat and ordinary, nothing that’s gonna get the heart racing just yet. We’ve got a few days of small, weak surf, and the wind is mostly a cross-off or off, which is good for tidiness, but the swell just isn’t there. We’re looking at a gap of a couple of days with nothing really worth paddling out for. The water temperature is 61°F, which is a touch warmer than normal for this time of year.
The first real nod comes on Thursday the 13th, with the swell nudging up to 4ft from the west-southwest, a period of 10 seconds and a gentle offshore wind. The energy is still moderate, around 257 on the dial. It’ll be clean, but still pretty average – just a surfable wave. The wind goes a bit cross-off in the afternoon and it gets a touch messier.
Friday and Saturday the 14th and 15th look poor, with a cross-shore and then cross-on wind throwing chop at us. The swell is there, 4ft to 5ft, but it’s short-period wind swell at 8 seconds and the surface will be messy. Not your friend.
Sunday the 16th is a little better, with a morning offshore breeze and a small 4ft from the northwest, cleaning things up a bit, but it’s still nothing special. The beginning of the following week, Monday the 17th, has a bit more size but the quality won't be there.
Then, hold on to your boardies. Around Wednesday the 19th, we’ve got a huge pulse of swell coming in. The models are showing a serious 23ft from the west-northwest with a 13-second period and a massive energy reading of 16219. That’s a big, powerful groundswell, but it’s too much for this spot. It’s going to be a washing machine, and with a cross-on wind, it’s a definite skip for paddling. The energy drops a bit on Thursday but it’s still way too big and onshore. This is kite-surf territory if anything.
Things start to settle down after that. We’re looking at a few days of still-large but messy surf, around 7ft. Finally, on Saturday the 22nd, the window opens. The swell drops down to 8ft from the west-northwest with a 10-second period. The wind is light, cross-off, and the energy is still strong at 1111. For an experienced surfer, this is going to be a proper session. It’s still a heavy wave, so not one for the learners.
And if you miss that, Sunday the 23rd is looking like another gem. The swell is still solid at 8ft from the northwest, but the wind goes light offshore, and the energy is around 1081. Clean, lined-up, and pushing hard. Another one for the experienced crew. The period is a moderate 10 seconds.
The last few days of the window fade out with smaller surf and the wind starts to blow again, so it looks like those two days at the end are the pick of the bunch. Look, it’s a long-range call, so treat it as promising rather than a guarantee, but worth circling in the diary.
That’s it from me. Stay safe out there.
Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Thu morning. Warm (max 22°C on Wed afternoon, min 14°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sun morning. Very mild (max 16°C on Fri morning, min 12°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 | WSW 10 | WSW 10 | WSW 9 | W 11 | WSW 10 | WSW 10 | W 9 | W 8 | W 8 | WNW 8 | WNW 8 | WNW 8 | NW 8 | NW 7 | NW 7 | W 10 | W 9 | W 8 | WNW 7 |
Wave Graph | |||||||||||||||||||||
102 | 73 | 180 | 135 | 124 | 281 | 255 | 245 | 160 | 171 | 257 | 330 | 277 | 277 | 210 | 121 | 89 | 67 | 304 | 157 | 167 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | off | off | cross-off | cross | cross | cross-on | cross-on | cross | cross-on | cross-off | off | off | cross | cross-off | off | cross |
High Tide | 5:37PM3.50m | 6:06AM3.13m | 6:24PM3.77m | 6:51AM3.25m | 7:07PM3.92m | 7:33AM3.29m | 7:48PM3.95m | 8:12AM3.27m | 8:27PM3.83m | 8:51AM3.19m | 9:06PM3.60m | 9:28AM3.06m | 9:44PM3.29m | ||||||||
Low Tide | 11:12AM0.43m | 11:55PM0.18m | 11:59AM0.22m | 00:41AM-0.01m | 12:41PM0.08m | 1:23AM-0.10m | 1:22PM0.03m | 2:03AM-0.08m | 2:01PM0.07m | 2:40AM0.04m | 2:40PM0.20m | 3:16AM0.24m | 3:19PM0.40m | 3:51AM0.49m | |||||||
6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:16 | — | — | |
— | — | 9:16 | — | — | 9:15 | — | — | 9:13 | — | — | 9:10 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 | |
mm | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — | 1 | — | 1 | 16 | — | — |
Temp °C | 19 | 21 | 20 | 21 | 22 | 20 | 20 | 21 | 15 | 16 | 16 | 15 | 15 | 15 | 13 | 16 | 16 | 15 | 15 | 17 | 15 |
Feels °C | 14 | 20 | 19 | 19 | 21 | 21 | 19 | 20 | 13 | 13 | 12 | 13 | 11 | 11 | 11 | 12 | 13 | 15 | 12 | 16 | 12 |
Swell 1 Height (m) Direction Period (s) | N 9 | N 9 | WSW 10 | WSW 10 | WSW 9 | W 11 | WSW 10 | WSW 10 | W 9 | N 10 | N 10 | N 9 | N 10 | N 10 | NW 8 | NW 7 | NW 7 | W 6 | W 9 | W 8 | N 7 |
102 | 73 | 180 | 135 | 124 | 281 | 255 | 245 | 160 | 8 | 17 | 15 | 17 | 16 | 210 | 121 | 89 | 39 | 304 | 157 | 4 | |
Swell 2 Height (m) Direction Period (s) | NW 8 | WSW 7 | N 8 | N 8 | N 8 | N 7 | NE 7 | N 7 | N 11 | — | — | — | — | — | N 9 | N 9 | N 9 | N 8 | N 8 | N 8 | W 19 |
20 | 16 | 33 | 11 | 5 | 4 | 2 | 1 | 2 | — | — | — | — | — | 15 | 26 | 38 | 49 | 21 | 11 | 7 | |
Swell 3 Height (m) Direction Period (s) | W 7 | WSW 12 | NW 7 | — | — | — | — | — | N 9 | — | — | — | — | — | W 8 | WSW 8 | WSW 8 | W 10 | N 7 | W 18 | — |
15 | 48 | 2 | — | — | — | — | — | 2 | — | — | — | — | — | 1 | 6 | 6 | 67 | 1 | 6 | — | |
Wind waves Height (m) Direction Period (s) | SE 4 | SSE 3 | SSE 3 | SE 3 | SSE 3 | — | SSE 2 | — | W 4 | W 8 | W 8 | WNW 8 | WNW 8 | WNW 8 | — | — | — | S 2 | S 4 | — | WNW 7 |
10 | 4 | 1 | 5 | 1 | — | 1 | — | 7 | 171 | 257 | 330 | 277 | 277 | — | — | — | 2 | 10 | — | 167 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 504 | 281 | 174 | 531 | 531 | 0 | 0 | 0 | 2 | 10 | 0 | 289 |
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.











