Surf Forecasts:
Kilcummin Harbour surf forecast from 27 Aug 2026:
- Best quality surf: Monday 31 Aug, 10PM (local time) - 5ft (1.6m), 9s period, W swell with offshore winds.
- Most powerful swell: Thursday 3 Sep, 1PM (local time) - 8ft (2.5m), 10s period, W swell with 1,379 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 1AM (local time) - 2ft (0.6m), 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 Sunday (Aug 30) at 1AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.7m and 7s. 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 2.5m 10s and forecast to arrive on Thursday (Sep 03) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Wednesday (Sep 02) at 10PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 30th Aug) | 2ft (0.6m) 10s |
| Best Surf | 10PM (Mon 31st Aug) | 5ft (1.6m) 9s |
| Most Powerful | 1PM (Thu 3rd Sep) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright folks, Rusty here. Looking at the long-range for Kilcummin Harbour (Kilcummin-Harbour). I’ll be straight with you: the opening days are a total flat-out bust. Thursday the 27th and Friday the 28th are tiny, crumbly, and blown out. There's just nothing to sink your fins into. Saturday the 29th is more of the same, small and onshore. Save your energy.
Sunday the 30th finally gives us a little break. A light offshore wind shows up in the afternoon, and the swell is a feeble 3ft. It’s surfable, but you’ll be on the longboard. The energy is still weak, around 154, so expect small, soft rollers.
Monday the 31st and Tuesday the 1st see some more size, pushing to around 5ft, but the wind is all over the place, and it’s short-period junk. The water temperature is running a bit warmer than usual, about 3°F above normal, which is noticeable for this time of year. It feels nice when you’re in it, but the waves are messy.
There’s another small window on the morning of Wednesday the 2nd. The wind goes light offshore, and the surf is a clean 3ft. It’s not exciting, but it’s clean. The afternoon is a washout with rain and wind.
Now, fast forward to Thursday the 3rd. The swell kicks up big time, hitting 9-10ft by the afternoon, but it’s on a strong cross-shore breeze, making it a nasty, choppy mix. You could paddle out if you had a death wish, but it’s really not for surfing.
Friday the 4th is the big one. The swell is up to 15ft, with a 12-second period, and the energy readings are massive – 5419 in the morning, 6059 in the afternoon. That’s a lot of water moving. But it’s way too big for this reef. This is a life-or-death session for the most experienced chargers only. It looks like a washing machine out there. Not for the faint of heart, that’s for sure.
But then we get Saturday the 5th. And this is the one. The surf eases to a still-hefty 8ft in the morning, with a light offshore breeze. That’s proper groundswell with some grunt. The afternoon looks even better. The wind goes glassy, and the waves are a clean 7ft. This is the pick of the whole fortnight. For the experienced surfers, this is firing and clean. A proper day out.
Sunday the 6th is a step down, with a fresh offshore breeze but smaller swell and a shorter period. It’s ok, but not the same. Monday the 7th is a write-off with a near-gale. Forget about it.
But look at Tuesday the 8th, the morning has a light breeze and a 6ft swell from the NW. It’s a solid, clean size, and could be really fun for the stronger surfers. After that, the week just fades away. The swell drops off, the wind turns onshore, and we’re back to small, messy slop through the end of the period.
So, here’s the bottom line. The first week is a waste. Don’t even think about it. The standout day is Saturday the 5th – glassy and solid. There’s also a promising morning on Tuesday the 8th. Friday the 4th is a big-wave spectacle for the experts only, it’s going to be giant, but dangerous. The second week, starting the 9th, looks quiet, so grab any clean windows you get.
Stay safe out there.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Thu afternoon. Warm (max 20°C on Thu afternoon, min 13°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Mon night. Very mild (max 17°C on Sun afternoon, min 12°C on Tue night). Winds increasing (light winds from the SSE on Sun afternoon, fresh winds from the S by Mon night). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 9 | WNW 9 | W 8 | WNW 8 | WNW 7 | N 5 | N 6 | N 6 | WSW 10 | WSW 9 | W 9 | WSW 11 | WNW 6 | W 9 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 9 |
Wave Graph | |||||||||||||||||||||
135 | 80 | 33 | 19 | 10 | 12 | 31 | 36 | 72 | 115 | 103 | 191 | 201 | 392 | 401 | 298 | 224 | 131 | 72 | 50 | 215 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | cross-on | on | on | cross-off | cross-off | off | cross-on | cross-off | cross-off | off | cross | cross | cross-off | off | cross-off | cross-off |
High Tide | 6:24PM3.43m | 6:42AM3.05m | 6:55PM3.57m | 7:13AM3.15m | 7:25PM3.64m | 7:45AM3.21m | 7:56PM3.62m | 8:17AM3.22m | 8:30PM3.53m | 8:52AM3.16m | 9:06PM3.35m | 9:31AM3.05m | 9:47PM3.11m | ||||||||
Low Tide | 12:03PM0.42m | 00:37AM0.31m | 12:34PM0.29m | 1:06AM0.18m | 1:05PM0.21m | 1:36AM0.10m | 1:36PM0.19m | 2:06AM0.10m | 2:10PM0.23m | 2:39AM0.17m | 2:46PM0.33m | 3:14AM0.32m | 3:26PM0.50m | 3:54AM0.54m | |||||||
6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | |
— | 8:40 | — | — | 8:38 | — | — | 8:36 | — | — | 8:34 | — | — | 8:30 | — | — | 8:29 | — | — | 8:25 | — | |
mm | — | 4 | 2 | — | — | 2 | 6 | — | — | 1 | 5 | 1 | — | 1 | 7 | — | — | — | — | 6 | 2 |
Temp °C | 19 | 20 | 17 | 17 | 17 | 15 | 15 | 16 | 15 | 16 | 17 | 15 | 16 | 14 | 14 | 15 | 16 | 14 | 16 | 16 | 16 |
Feels °C | 19 | 19 | 18 | 17 | 15 | 14 | 13 | 14 | 14 | 14 | 17 | 12 | 12 | 9 | 10 | 9 | 11 | 12 | 12 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | W 8 | WNW 8 | WNW 7 | NW 7 | NNW 7 | NW 7 | NNW 7 | WSW 9 | W 9 | WSW 11 | W 10 | N 7 | N 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 9 |
135 | 80 | 33 | 19 | 10 | 8 | 5 | 8 | 45 | 115 | 103 | 191 | 120 | 32 | 18 | 298 | 224 | 131 | 72 | 50 | 215 | |
Swell 2 Height (m) Direction Period (s) | N 13 | NW 12 | N 9 | NW 8 | NNW 8 | WNW 7 | W 7 | W 7 | WSW 10 | N 7 | N 7 | N 7 | N 7 | — | NNE 7 | N 9 | N 6 | N 7 | N 7 | N 7 | N 7 |
3 | 5 | 1 | 3 | 6 | 5 | 4 | 3 | 72 | 51 | 51 | 34 | 23 | — | 9 | 6 | 98 | 103 | 46 | 38 | 17 | |
Swell 3 Height (m) Direction Period (s) | — | N 8 | NW 10 | N 8 | N 8 | N 8 | W 11 | W 10 | NNW 6 | — | — | WSW 11 | — | — | — | — | W 18 | W 17 | W 16 | W 16 | N 10 |
— | 1 | 4 | 1 | 1 | 1 | 2 | 2 | 4 | — | — | 40 | — | — | — | — | 6 | 6 | 5 | 5 | 2 | |
Wind waves Height (m) Direction Period (s) | NE 3 | NE 5 | NNE 5 | N 4 | N 4 | N 5 | N 6 | N 6 | — | SE 3 | ESE 3 | NW 3 | WNW 6 | W 9 | W 8 | N 6 | — | — | SSE 3 | SSE 4 | SSE 4 |
2 | 6 | 19 | 13 | 9 | 12 | 31 | 36 | — | 2 | 1 | 2 | 201 | 392 | 401 | 77 | — | — | 2 | 11 | 38 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 37 | 10 | 111 | 272 | 233 | 457 | 269 | 259 | 0 | 10 | 0 | 163 | 233 | 2 | 453 | 451 | 1233 | 0 | 0 | 116 | 453 |
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.











