Surf Forecasts:
Kilcummin Harbour surf forecast from 27 Aug 2026:
- Best quality surf: Thursday 3 Sep, 4AM (local time) - 6ft (1.8m), 9s period, WSW swell with offshore winds.
- Most powerful swell: Friday 4 Sep, 1AM (local time) - 10ft (3.0m), 11s period, W swell with 2,196 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 1AM (local time) - 2ft (0.6m), 7s 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 Sunday (Aug 30) at 1AM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.6m 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 3.0m 11s and forecast to arrive on Friday (Sep 04) at 1AM. Winds are predicted to be cross-offshore 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) 7s |
| Best Surf | 4AM (Thu 3rd Sep) | 6ft (1.8m) 9s |
| Most Powerful | 1AM (Fri 4th Sep) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break it down in feet, temps in Fahrenheit, and wind in mph. Kilcummin Harbour sees a rough patch right off the bat – nothing worth surfing from Thursday afternoon through the weekend.
First glimmer arrives Sunday morning, 30 August. Tiny surf – about 3ft from the WSW, combined energy sitting at 163 (moderate wave energy). Clean cross-off breeze. Barely surfable but you could sit and wait.
Monday 31 August sees a bump – waves around 5ft from the west in the afternoon, cross-off wind, combined energy climbing to 478 (moderate). More push but nothing to write home about.
Tuesday 1 September brings head-high sets, about 7ft from the WNW, period still short at 9 seconds. Cross-shore wind puts a chop on it. Combined energy 734 (moderate). Manageable but not clean.
Wednesday 2 September morning is your first clean session. Swell drops to 3ft from the north, 8-second period, but the wind is a light cross-off from the SSE. Combined energy 212 (moderate). Small, tidy, and clean – a fun session.
Thursday 3 September is blown out by a strong breeze and messy cross-off. Skip it. Friday 4 September brings a massive pulse – 12ft from the WNW with a 13-second period. Combined energy roars to 4169 (very strong wave energy). Wind is cross-off but strong. This is strictly for experts. Swell this size over 2.5m (8ft) is no joke.
Saturday morning 5 September is your big standout. Waves holding at 10ft from the WNW, 10-second period, but a light offshore from the SSW keeps it clean. Combined energy at 1561 (strong). Big, powerful, and clean. Only for experienced surfers.
Sunday 6 September is smaller and messy. Monday 7 September morning cleans up – 5ft from the NNW, light cross-off wind from the WSW, combined energy 549 (moderate). Solid and manageable for most.
Tuesday 8 September morning – very good. 4ft from the west with a longer 12-second period, light ESE offshore wind, combined energy 636 (moderate). Clean, shaped up, friendly.
Second week gets iffy. Wednesday 9 September is bumpy with onshore wind, 8ft WSW but messy. Thursday 10 September is cross-shore and not great. Friday 11 September is a mess of wind and rain.
The best two windows: Saturday morning 5 September – big, clean, powerful groundswell for experts. Tuesday morning 8 September – clean, long-period, great shape for everyone.
Water temp is about 62°F, a touch warmer than usual for this time of year. Not bad.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Thu afternoon. Very mild (max 19°C on Thu afternoon, min 13°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Mon night. Very mild (max 17°C on Sun afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the SW on Mon night, light winds from the SW by Tue night). | |||||||||||||||||||
Thu 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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 | W 8 | WNW 8 | N 5 | N 5 | N 6 | N 6 | N 7 | WSW 9 | WSW 9 | WSW 11 | WSW 10 | W 10 | W 8 | WNW 9 | WNW 9 | WNW 8 | N 8 | N 8 | WSW 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 80 | 33 | 19 | 16 | 21 | 33 | 28 | 37 | 118 | 108 | 91 | 163 | 464 | 537 | 734 | 512 | 257 | 135 | 82 | 395 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | cross-on | cross-on | on | off | cross-off | cross-off | cross-on | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | off | 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 | 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 | |||||||
 |  |  | | |  |  | | | |  |  | | | | |  | | |  | |
 | — | — | 6:35 | — | — | 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 | 5 | 3 | — | — | 1 | 2 | — | 1 | — | 1 | — | — | — | 2 | — | — | — | — | — | 3 |
Temp °C | 19 | 17 | 17 | 16 | 15 | 15 | 16 | 15 | 16 | 17 | 15 | 16 | 16 | 15 | 15 | 16 | 13 | 17 | 18 | 17 |
Feels °C | 18 | 18 | 15 | 14 | 14 | 15 | 15 | 15 | 13 | 16 | 14 | 11 | 11 | 9 | 10 | 11 | 11 | 14 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | W 8 | WNW 8 | WNW 7 | N 5 | N 6 | N 6 | N 7 | WSW 9 | WSW 9 | WSW 9 | WSW 10 | N 7 | N 7 | WNW 9 | WNW 9 | WNW 8 | N 8 | N 8 | N 8 |
| kJ | 80 | 33 | 19 | 10 | 21 | 33 | 28 | 32 | 118 | 108 | 80 | 163 | 14 | 8 | 734 | 512 | 257 | 135 | 82 | 18 |
Swell 2 Height (m) Direction Period (s) | N 5 | NW 10 | NW 8 | NNW 8 | NW 6 | NNW 8 | NW 7 | WSW 10 | N 7 | N 7 | WSW 11 | N 7 | — | — | — | N 8 | N 8 | WNW 8 | WNW 7 | N 11 |
| kJ | 4 | 4 | 3 | 6 | 7 | 6 | 8 | 37 | 44 | 46 | 91 | 21 | — | — | — | 1 | 13 | 50 | 20 | 39 |
Swell 3 Height (m) Direction Period (s) | NW 12 | N 8 | N 8 | N 8 | WNW 7 | W 7 | W 7 | NW 6 | NW 6 | NW 6 | N 7 | — | — | — | — | N 9 | NW 9 | W 7 | N 12 | W 16 |
| kJ | 5 | 1 | 1 | 1 | 5 | 4 | 3 | 10 | 1 | 1 | 33 | — | — | — | — | 2 | 3 | 27 | 12 | 5 |
Wind waves Height (m) Direction Period (s) | E 3 | NNE 5 | N 5 | N 5 | — | — | — | — | SE 2 | — | NNW 3 | WNW 5 | W 10 | W 8 | — | — | — | SSE 3 | SW 7 | WSW 9 |
| kJ | 1 | 26 | 16 | 16 | — | — | — | — | 1 | — | 7 | 56 | 464 | 537 | — | — | — | 3 | 82 | 395 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 10 | 69 | 272 | 235 | 112 | 244 | 451 | 0 | 0 | 0 | 171 | 2 | 2 | 492 | 233 | 341 | 0 | 0 | 0 | 0 |
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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