Surf Forecasts:
Kilcummin Harbour surf forecast from 31 Aug 2026:
- Best quality surf: Friday 4 Sep, 7AM (local time) - 15ft (4.5m), 13s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 10AM (local time) - 16ft (5.0m), 13s period, WNW swell with 8,844 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 10PM (local time) - 5ft (1.5m), 8s period with W 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 (Sep 01) at 10PM. The primary swell is predicted to be 1.5m and 8s period with a secondary swell of 0.2m and 6s. 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 13s and forecast to arrive on Friday (Sep 04) at 10AM. 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 Wednesday (Sep 02) at 4PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 1st Sep) | 5ft (1.5m) 8s |
| Best Surf | 7AM (Fri 4th Sep) | 15ft (4.5m) 13s |
| Most Powerful | 10AM (Fri 4th Sep) | 16ft (5.0m) 13s |
Table - best surf conditions forecast for Kilcummin Harbour over the next 16 days.
The Lowdown
Alright, Rusty here, let's take a look at what's coming down the pipe over the next couple of weeks at Kilcummin Harbour.
We've got a bit of a slow start through the first few days, with some messy, weak swell on offer. Honestly, for the first few days, it looks pretty grim with poor conditions and not much to get excited about. The water's sitting at a mild 62°, which is a touch warmer than usual for this time of year.
There's a big spike coming, though. Friday the 4th of September is looking *mental*. We're talking a massive 16 ft W/NW groundswell hitting, but the wind is going to be howling from the WSW at 25 mph, so it’ll be all cross-shore and choppy. That's too much for this spot – a true expert-only, massive, dangerous day. Saturday the 5th of September is the real standout. It’s a 8 ft W/NW swell with a 10-second period, giving it solid juice, and the wind flips to a light offshore from the SSW at just 9 mph. That’s going to groom the waves into something special. It's a reef break that can get crowded, so get there early for some clean, lined-up waves. Saturday afternoon holds up nicely with a 6 ft W/NW swell but the wind picks up a bit.
Sunday the 6th is a smaller, cleaner day with 4 ft W swell and offshore winds, great for a longboard or a fun board.
The following week gets interesting again. Monday the 14th of September shows some serious size building with an 12 ft W swell and offshore wind, but that's edging into serious territory. Then Tuesday the 15th of September looks like another massive groundswell event with an 18 ft W/NW swell, making it purely a big-wave spot for experts only.
Overall, there are a couple of proper days, but a lot of the big stuff is for the experienced crew. For the average surfer, lock in Saturday the 5th of September for the best combo of size, power, and clean conditions.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Wed morning. Very mild (max 18°C on Wed afternoon, min 13°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Very mild (max 18°C on Thu morning, min 13°C on Thu night). Winds decreasing (strong winds from the WSW on Fri morning, light winds from the WSW by Fri night). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 7 | W 10 | W 6 | W 8 | W 8 | WNW 8 | W 8 | W 7 | W 7 | W 8 | W 9 | W 11 | WNW 13 | WNW 13 | WNW 12 | WNW 10 | WNW 10 | NW 8 | W 8 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 343 | 273 | 120 | 377 | 476 | 257 | 93 | 67 | 215 | 264 | 476 | 2360 | 8844 | 6957 | 3253 | 1202 | 688 | 160 | 153 | 153 | 173 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | off | off | off | off | off | cross-on |
High Tide | 8:30PM3.53m | 8:52AM3.16m | 9:06PM3.35m | 9:31AM3.05m | 9:47PM3.11m | 10:16AM2.89m | 10:39PM2.83m | 11:14AM2.71m | 11:49PM2.56m | 12:36PM2.60m | 1:27AM2.41m | 2:14PM2.67m | 3:05AM2.49m | ||||||||
Low Tide | 2:10PM0.23m | 2:39AM0.17m | 2:46PM0.33m | 3:14AM0.32m | 3:26PM0.50m | 3:54AM0.54m | 4:14PM0.72m | 4:44AM0.79m | 5:20PM0.95m | 5:55AM1.03m | 6:59PM1.08m | 7:36AM1.11m | 8:50PM0.96m | ||||||||
 | |  | |  |  | | |  | | | |  | | |  | | | | | | |
 | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — |
 | — | 8:30 | — | — | 8:29 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:19 | — | — | 8:16 | — |
mm | — | — | — | — | 2 | 2 | 4 | 1 | — | — | — | — | — | — | — | — | — | 1 | 5 | — | — |
Temp °C | 15 | 16 | 15 | 17 | 16 | 15 | 17 | 18 | 17 | 18 | 17 | 15 | 15 | 15 | 14 | 15 | 16 | 18 | 18 | 19 | 17 |
Feels °C | 10 | 11 | 12 | 12 | 13 | 14 | 15 | 14 | 14 | 13 | 12 | 10 | 7 | 8 | 10 | 12 | 12 | 15 | 16 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | NNW 7 | W 9 | N 7 | N 6 | WNW 8 | W 8 | W 7 | N 9 | N 11 | N 10 | N 10 | N 9 | N 9 | — | WNW 10 | WNW 10 | NW 8 | W 8 | W 8 | W 8 |
| kJ | 128 | 93 | 74 | 8 | 3 | 257 | 93 | 67 | 74 | 185 | 138 | 46 | 15 | 6 | — | 1202 | 688 | 160 | 153 | 153 | 173 |
Swell 2 Height (m) Direction Period (s) | N 6 | NNE 6 | N 6 | — | W 18 | N 6 | N 8 | N 8 | N 11 | W 18 | W 11 | — | — | — | — | NNW 8 | N 8 | W 9 | NW 8 | NNW 8 | NW 8 |
| kJ | 20 | 8 | 28 | — | 6 | 3 | 33 | 45 | 112 | 6 | 59 | — | — | — | — | 107 | 61 | 126 | 72 | 47 | 17 |
Swell 3 Height (m) Direction Period (s) | — | — | N 10 | — | — | N 8 | N 14 | N 12 | W 16 | — | W 17 | — | — | — | — | — | — | — | N 9 | N 9 | N 10 |
| kJ | — | — | 2 | — | — | 6 | 4 | 12 | 5 | — | 6 | — | — | — | — | — | — | — | 2 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | WNW 7 | W 10 | W 6 | W 8 | W 8 | — | SE 3 | SW 4 | W 7 | W 8 | W 9 | W 11 | WNW 13 | WNW 13 | WNW 12 | — | — | S 3 | SSE 3 | SSE 4 | S 2 |
| kJ | 343 | 273 | 120 | 377 | 476 | — | 5 | 28 | 215 | 264 | 476 | 2360 | 8844 | 6957 | 3253 | — | — | 8 | 7 | 9 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 564 | 2 | 2 | 2 | 2 | 0 | 10 | 131 | 2 | 2 | 553 | 351 | 513 | 730 | 233 | 0 | 11 | 0 | 0 | 0 | 508 |
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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