
Surf Forecasts:
Kilcummin Harbour surf forecast from 12 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 7PM (local time) - 15ft (4.5m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Tuesday 18 Aug, 10PM (local time) - 16ft (5.0m), 12s period, W swell with 7,219 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 7AM (local time) - 3ft (0.9m), 10s period with WSW 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 Wednesday (Aug 12) at 7AM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 0.4m and 8s. 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 5.0m 12s and forecast to arrive on Tuesday (Aug 18) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Aug 17) at 1PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 12th Aug) | 3ft (0.9m) 10s |
| Best Surf | 7PM (Tue 18th Aug) | 15ft (4.5m) 11s |
| Most Powerful | 10PM (Tue 18th Aug) | 16ft (5.0m) 12s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks.
Right off the bat, the first few days are a bit of a write-off. We’ve got some small waves at Kilcummin Harbour, but the conditions are just ordinary. Wednesday the 12th has waist-high 3ft swell from the WSW, but the wind is off and on and the combined energy is weak (146). Not worth paddling out for. Thursday the 13th morning is a little better with 4ft and a cleaner look, but still not a standout.
Friday the 14th through to the start of the following week, it’s a poor run. Onshore winds and choppy conditions take over. The swell jumps around but the quality is shot. There’s a gap of several days here where the surf just isn’t worth your time.
Now, the real action starts to build on Tuesday the 18th. The morning brings a solid 8ft swell from the west, with a moderate offshore wind from the south. That’s clean, and the combined energy is ramping up to 766 – that’s solid, moderate energy. This is a proper session. By the afternoon, the swell jumps to 13ft, but the wind crosses off and the energy is very strong (2849). That’s big, powerful surf. It’s going to be a handful. For experienced surfers, Tuesday morning is the pick of the first week: clean, strong, and punchy. Beginners should stay well clear of that 8ft+ stuff.
The following Wednesday the 19th is a write-off. Strong onshore winds and a massive, messy 15ft swell. That’s kite-surfing territory, not paddle surfing. The energy is extraordinary (4465) but it’s a blown-out mess.
After that, the swell drops and the week from the 20th to the 24th is mostly poor to marginal. There’s a bright spot though. Saturday the 22nd morning sees 5ft from the WSW with a light offshore breeze from the SSW. The combined energy is 428 – moderate – and the report says “expect good surf conditions.” That’s a solid window for a clean, fun session.
The real standout, the one you need to circle on your calendar, is Tuesday the 25th. The morning offers 5ft from the north, with a clean offshore wind from the south. The combined energy is 546 (moderate), and the forecast rates it as “very good surf conditions.” The wind is gentle and offshore, the swell has a nice 9-second period – that’s a proper groundswell. It’s going to be clean, lined up, and fun for intermediate and advanced surfers. The afternoon sees a bit more size at 6ft and still offshore, though the wind picks up a touch. Still, the morning session on Tuesday the 25th is the best bet across the entire outlook.
Remember, this is a reef break that likes a NNW swell direction. The north swell on the 25th is a great match. Crowds are sometimes an issue here, so get in early.
Stay stoked, and I’ll see you in the water.
Rusty
Short Range ForecastModerate rain (total 13mm), heaviest 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 5mm), mostly falling on Sun night. Very mild (max 16°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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) | WSW 10 | WSW 9 | WSW 11 | WSW 10 | W 10 | W 9 | W 9 | W 8 | WNW 7 | WNW 8 | NW 8 | NW 8 | NW 8 | NW 8 | N 8 | W 8 | W 8 | WSW 7 | W 8 | W 10 | WNW 12 |
Wave Graph | |||||||||||||||||||||
135 | 124 | 343 | 255 | 235 | 164 | 94 | 133 | 186 | 253 | 226 | 208 | 122 | 82 | 47 | 160 | 333 | 337 | 765 | 2849 | 7136 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | off | on | off | cross-off | cross-on | off | off | cross-off | cross-off |
High Tide | 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 | 10:06AM2.89m | 10:23PM2.94m | |||||||
Low Tide | 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 | 3:59PM0.66m | ||||||||
6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:16 | — | — | 6:18 | — | — | |
— | — | 9:15 | — | — | 9:13 | — | — | 9:10 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 | — | — | 9:01 | |
mm | — | — | 3 | 7 | 2 | 1 | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | 3 |
Temp °C | 20 | 22 | 20 | 19 | 20 | 16 | 15 | 15 | 13 | 13 | 14 | 14 | 14 | 16 | 14 | 15 | 15 | 15 | 17 | 16 | 15 |
Feels °C | 19 | 21 | 21 | 18 | 19 | 15 | 13 | 12 | 9 | 10 | 10 | 12 | 13 | 15 | 13 | 12 | 13 | 15 | 12 | 10 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 9 | WSW 11 | WSW 10 | W 10 | W 9 | W 9 | N 10 | WNW 8 | WNW 8 | NW 8 | NW 8 | NW 8 | NW 8 | N 8 | W 8 | N 8 | N 7 | N 7 | — | — |
135 | 124 | 343 | 255 | 235 | 164 | 94 | 17 | 40 | 253 | 226 | 208 | 122 | 82 | 47 | 160 | 10 | 4 | 1 | — | — | |
Swell 2 Height (m) Direction Period (s) | N 8 | N 8 | N 7 | NE 7 | NE 7 | N 11 | N 10 | — | N 9 | N 10 | N 9 | WSW 7 | W 6 | N 9 | NW 7 | N 8 | SSE 4 | W 19 | — | — | — |
11 | 5 | 4 | 2 | 2 | 2 | 8 | — | 15 | 16 | 6 | 9 | 7 | 39 | 29 | 31 | 1 | 7 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | SSE 3 | — | — | — | N 9 | — | — | — | — | — | N 9 | N 9 | W 6 | W 9 | NW 6 | N 6 | — | — | — | — |
— | 1 | — | — | — | 2 | — | — | — | — | — | 6 | 15 | 7 | 28 | 2 | 1 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 3 | — | — | SSE 2 | — | WNW 3 | WNW 4 | W 8 | WNW 7 | — | — | — | — | — | — | S 3 | W 8 | WSW 7 | W 8 | W 10 | WNW 12 |
5 | — | — | 1 | — | 4 | 9 | 133 | 186 | — | — | — | — | — | — | 10 | 333 | 337 | 765 | 2849 | 7136 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 2 | 2 | 437 | 437 | 562 | 151 | 775 | 2 | 0 | 10 | 0 | 0 | 55 | 0 | 0 | 194 | 194 |
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.











