
Surf Forecasts:
Ballyhiernan Bay surf forecast from 14 Sep 2026:
- Best quality surf: Friday 18 Sep, 1AM (local time) - 13ft (4.0m), 14s period, NW swell with cross-shore winds.
- Most powerful swell: Thursday 17 Sep, 7PM (local time) - 15ft (4.5m), 16s period, NW swell with 9,539 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 1AM (local time) - 13ft (4.0m), 14s period with NW swell.
Best Forecast Surf Conditions for Ballyhiernan Bay this week:
The surf forecast for Ballyhiernan Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 18) at 1AM. The primary swell is predicted to be 4.0m and 14s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Ballyhiernan Bay in the next 16 days are 4.5m 16s and forecast to arrive on Thursday (Sep 17) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Monday (Sep 21) at 10AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 18th Sep) | 13ft (4.0m) 14s |
| Best Surf | 1AM (Fri 18th Sep) | 13ft (4.0m) 14s |
| Most Powerful | 7PM (Thu 17th Sep) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Ballyhiernan Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here, giving you the lowdown on what’s coming our way.
We’ve got a bit of a mixed bag to kick things off, but there are a few windows that’ll get the heart pumping. Right now, it’s pretty quiet, but we’re looking at a slow build into the weekend and beyond.
The first real sniff of a wave is this Monday morning, September 14th. Ballyhiernan Bay will have clean, small 2ft waves coming from the NNW with a nice long 13-second period, making for some smooth lines. The water is sitting at 60°, which is a touch warmer than normal for this time of year. It’s small, but with that SSE offshore breeze, it’ll be glassy and inviting for a longboard. The wave energy is moderate (251).
Monday afternoon sees the swell picking up a touch to 3ft, but the direction swings to the west with a short 8-second period, so it’ll be a bit crumbly. Still, the offshore wind holds, so it’s surfable.
Tuesday (Sept 15th) is a write-off with strong onshore winds and a messy, lumpy sea. Wednesday (Sept 16th) morning gets bigger – 7ft – but it’s still blown out and choppy. Not worth the paddle.
Now, here’s where it gets interesting. Sunday, September 20th is the standout. Ballyhiernan Bay is going to fire. We’re looking at a solid 7ft NW groundswell with a 12-second period. That’s a proper swell. The real kicker is the offshore wind from the SE – gentle breeze, making for clean, peeling faces. The wave energy is strong (1366). This is one for the experienced crew, as it’ll be a bit of a handful for beginners. It’s exposed here, so it’ll handle that size well.
After that, the following week looks promising but with less size. Monday, September 21st, has a nice 5ft WNW swell and offshore winds again – a great morning for a session with moderate energy (527). Tuesday morning (Sept 22nd) stays clean with 4ft from the west. Things go a bit onshore again by Tuesday afternoon, so hit the morning windows.
There’s a long gap in the quality from Wednesday the 23rd through Friday the 25th, with onshore winds and smaller, weaker swell. The energy drops right down.
We get a glimpse of something better on Thursday, September 24th morning – a clean 7ft WNW swell with a 12-second period and a cross-off breeze, giving us moderate to strong energy (1063). That one is worth a look for the more experienced crew.
The very end of the forecast, Tuesday, September 29th, shows a glimmer of hope with a 4ft WNW groundswell and a very long 14-second period. The wind is offshore and the energy is moderate (510). That’s a promising call for a clean session, but it’s a long way out.
So, to wrap it up: the best bet on the table is Sunday, September 20th for the biggest, cleanest swell of the period. After that, hit the morning sessions on Monday the 21st and Tuesday the 22nd, and keep an eye on Thursday the 24th morning.
Stay stoked.
Rusty
Short Range ForecastModerate rain (total 14mm), heaviest on Wed night. Very mild (max 18°C on Mon morning, min 13°C on Tue afternoon). Winds increasing (light winds from the S on Mon morning, strong winds from the WSW by Wed night). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Fri morning. Very mild (max 16°C on Fri night, min 11°C on Sat night). Winds decreasing (strong winds from the W on Thu afternoon, light winds from the S by Sat night). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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) | NNW 13 | W 8 | W 9 | WNW 10 | WNW 9 | WNW 8 | WNW 11 | WNW 10 | W 8 | WNW 10 | WNW 15 | NW 14 | NW 13 | WNW 12 | WNW 11 | WNW 10 | WNW 11 | WNW 12 | NW 12 | NW 13 | NW 12 |
Wave Graph | |||||||||||||||||||||
133 | 144 | 573 | 328 | 456 | 638 | 1062 | 574 | 552 | 1455 | 8156 | 6705 | 3318 | 1971 | 1121 | 984 | 1285 | 1485 | 1366 | 1471 | 1060 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross | cross-on | cross-on | cross-on | cross-on | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross-off | off | cross-off | cross-off |
High Tide | 8:54PM3.31m | 9:09AM3.09m | 9:27PM3.03m | 9:42AM2.90m | 10:00PM2.73m | 10:18AM2.67m | 10:38PM2.44m | 11:03AM2.43m | 11:32PM2.17m | 12:21PM2.22m | 1:21AM2.01m | 2:32PM2.20m | 3:23AM2.09m | ||||||||
Low Tide | 2:38PM0.12m | 2:59AM0.27m | 3:13PM0.35m | 3:31AM0.53m | 3:49PM0.63m | 4:04AM0.80m | 4:29PM0.93m | 4:44AM1.07m | 5:23PM1.22m | 5:44AM1.31m | 7:01PM1.41m | 7:38AM1.40m | 9:09PM1.35m | ||||||||
6:58 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — | |
— | 7:52 | — | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — | — | 7:40 | — | — | 7:38 | — | — | 7:36 | — | |
mm | — | 1 | 1 | 2 | 2 | 4 | 1 | — | 3 | 2 | — | — | 2 | 3 | — | — | — | — | 1 | 1 | — |
Temp °C | 18 | 18 | 17 | 14 | 14 | 13 | 13 | 14 | 14 | 13 | 13 | 14 | 14 | 15 | 16 | 15 | 14 | 13 | 13 | 19 | 18 |
Feels °C | 17 | 16 | 15 | 9 | 8 | 6 | 7 | 8 | 8 | 4 | 3 | 8 | 9 | 9 | 11 | 10 | 9 | 9 | 10 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | W 8 | N 12 | WNW 10 | NNW 11 | N 10 | WNW 11 | WNW 10 | N 8 | N 8 | N 8 | — | NW 13 | WNW 12 | WNW 11 | — | WNW 11 | WNW 12 | NW 12 | NW 13 | NW 12 |
118 | 144 | 71 | 328 | 38 | 17 | 1062 | 574 | 36 | 12 | 1 | — | 3318 | 1971 | 1121 | — | 1285 | 1485 | 1366 | 1471 | 1060 | |
Swell 2 Height (m) Direction Period (s) | NNW 13 | N 12 | — | NNW 11 | — | — | N 9 | N 9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
133 | 113 | — | 40 | — | — | 7 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | S 2 | W 9 | — | WNW 9 | WNW 8 | — | — | W 8 | WNW 10 | WNW 15 | NW 14 | — | — | — | WNW 10 | — | — | — | — | — |
— | 1 | 573 | — | 456 | 638 | — | — | 552 | 1455 | 8156 | 6705 | — | — | — | 984 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 146 | 409 | 794 | 445 | 128 | 36 | 336 | 398 | 794 | 366 | 36 | 366 | 36 | 67 | 214 | 0 | 0 | 28 | 28 |
Best forecast wave conditions in Donegal | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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Information about the Ballyhiernan Bay Surf forecast
The above surf forecast table for Ballyhiernan Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ballyhiernan Bay can be found by selecting the local surf guide option on the grey menu. Our Ballyhiernan Bay 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 (Ballyhiernan Bay) 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 Ballyhiernan Bay 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.
Ballyhiernan Bay is 28 km (17 miles) from Malin Head. If you plan a holiday in Donegal, look for hotels and other accommodation in Malin Head. Malin Head has rooms for a wide range of budgets as well as car hire and transport links.










