Surf Forecasts:
Carrownisky surf forecast from 21 Aug 2026:
- Best quality surf: Monday 24 Aug, 4AM (local time) - 1.5ft (0.4m), 12s period, WNW swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 4AM (local time) - 1.5ft (0.4m), 12s period, WNW swell with 54 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 4AM (local time) - 1.5ft (0.4m), 12s period with WNW swell.
Best Forecast Surf Conditions for Carrownisky this week:
The surf forecast for Carrownisky over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 4AM. The primary swell is predicted to be 0.4m and 12s period with a secondary swell of 0.1m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Carrownisky in the next 16 days are 0.4m 12s and forecast to arrive on Monday (Aug 24) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 25) at 4PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Mon 24th Aug) | 1.5ft (0.4m) 12s |
| Best Surf | 4AM (Mon 24th Aug) | 1.5ft (0.4m) 12s |
| Most Powerful | 4AM (Mon 24th Aug) | 1.5ft (0.4m) 12s |
Table - best surf conditions forecast for Carrownisky over the next 16 days.
The Lowdown
Alright, let’s be real – the next 16 days are a total bust for Carrownisky. There’s nothing worth paddling out for, and I mean nothing. The first few days are flat and messy, and that pattern just drags on through the end of August and into early September. You’ll see a lot of tiny, weak swell with cross-shore winds that kill any chance of a decent wave.
The only day that even shows a pulse is Saturday, August 29th, when the swell hits about 4 feet from the west, with a combined energy of 219. But the wind is blowing onshore and choppy, so it’s just a mess. That’s kite-surfing weather, not surf. The swell direction is WNW, which is what this spot likes, but it doesn’t matter with that wind.
Water temp? No reading here, so I can’t say if it’s warm or cold for this time of year.
Bottom line: this is a tough stretch. Carrownisky is usually consistent, so a dry spell like this is a bit of a surprise. But for now, save your energy and wait for a change.
Rusty
Short Range ForecastMostly dry. Very mild (max 16°C on Sat afternoon, min 13°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Wed afternoon. Warm (max 22°C on Mon afternoon, min 13°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the ESE by Tue afternoon). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 3 | NNW 3 | WNW 6 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | NW 10 | WNW 10 | W 10 | W 10 | W 9 | W 9 | W 8 | WSW 8 | WSW 8 | W 7 | W 10 | WNW 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 9 | 3 | 10 | 8 | 9 | 8 | 7 | 27 | 37 | 50 | 30 | 14 | 6 | 6 | 12 | 12 | 9 | 16 | 20 | 14 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | glassy | cross | cross-on | cross-off | off | cross-off | off | off | cross-off | off | off | cross-off | off | off | off | cross-off |
High Tide | 12:25PM2.73m | 1:13AM2.52m | 1:55PM2.70m | 2:51AM2.56m | 3:17PM2.84m | 4:00AM2.73m | 4:13PM3.08m | 4:46AM2.95m | 4:54PM3.33m | 5:22AM3.17m | 5:29PM3.57m | 5:55AM3.37m | 6:01PM3.77m | ||||||||
Low Tide | 5:52AM1.48m | 6:58PM1.53m | 7:30AM1.60m | 8:42PM1.48m | 9:01AM1.51m | 9:50PM1.27m | 9:59AM1.31m | 10:36PM1.01m | 10:41AM1.07m | 11:12PM0.74m | 11:16AM0.84m | 11:44PM0.49m | 11:48AM0.64m | 00:15AM0.28m | |||||||
 |  |  | | | | | | | | |  |  | |  |  |  | | |  | | |
 | 6:26 | — | — | 6:28 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — |
 | — | 8:55 | — | — | 8:53 | — | — | 8:52 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:42 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 1 | 10 | 8 | — | 1 | — |
Temp °C | 14 | 15 | 13 | 15 | 16 | 15 | 15 | 15 | 15 | 18 | 22 | 19 | 19 | 19 | 17 | 17 | 16 | 15 | 18 | 18 | 15 |
Feels °C | 9 | 9 | 10 | 13 | 13 | 13 | 13 | 13 | 14 | 15 | 19 | 16 | 13 | 14 | 17 | 16 | 15 | 15 | 14 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | W 9 | WNW 6 | NW 5 | NW 5 | NW 6 | NW 5 | NW 6 | NW 10 | WNW 10 | W 10 | W 10 | W 9 | W 9 | W 8 | WSW 8 | WSW 8 | W 7 | W 10 | WNW 10 | W 9 |
| kJ | 5 | 1 | 3 | 1 | 1 | 1 | 1 | 2 | 27 | 37 | 50 | 30 | 14 | 6 | 6 | 12 | 12 | 9 | 16 | 20 | 14 |
Swell 2 Height (m) Direction Period (s) | W 9 | W 7 | W 10 | W 9 | W 9 | W 9 | SW 15 | SW 14 | W 9 | W 9 | W 14 | W 13 | NW 11 | NW 11 | W 9 | — | — | W 10 | W 13 | — | — |
| kJ | 1 | 1 | 2 | 2 | 2 | 2 | 8 | 7 | 2 | 2 | 4 | 3 | 5 | 4 | 2 | — | — | 2 | 3 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | W 7 | SW 16 | SW 15 | SW 15 | W 8 | W 8 | SW 11 | SW 14 | — | — | S 13 | — | — | — | — | — | — | — | — |
| kJ | — | — | 1 | 10 | 8 | 9 | 1 | 1 | 4 | 8 | — | — | 3 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 3 | NNW 3 | N 3 | — | — | — | — | — | — | — | — | — | — | SE 3 | — | — | — | — | — | — | — |
| kJ | 5 | 9 | 1 | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 249 | 248 | 80 | 30 | 180 | 177 | 177 | 127 | 32 | 22 | 0 | 70 | 150 | 166 | 80 | 22 | 22 | 22 | 74 | 80 | 22 |
Best forecast wave conditions in Mayo and Achill Island | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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Information about the Carrownisky Surf forecast
The above surf forecast table for Carrownisky provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Carrownisky can be found by selecting the local surf guide option on the grey menu. Our Carrownisky 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 (Carrownisky) 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 Carrownisky 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.
Are you planning a holiday in Mayo and Achill Island? If you are looking for accommodation near Carrownisky, camping, hotels and holiday cottages in Mayo and Achill Island, consider staying in Westport which is 25 km (16 miles) away. Other places in and around Mayo and Achill Island where you can find information about places to rent, and car hire include Belmullet which is 55 km (34 miles) away, Claremorris, Ballina and Galway.
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