Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Ballyhiernan Bay surfForecast / Donegal / Ireland
48hr Weather and Surf, issued 11 am Sunday 21 Dec 2025 ISTForecast update in hr min s Forecast update imminent
Ballyhiernan Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Ballyhiernan Bay sea temperature is
9.5° C
(Which is slightly cooler than normal)How big are the waves at Ballyhiernan Bay today?
The current surf forecast for Ballyhiernan Bay at 7PM is: 2.5m 15s primary swell from a Northwest direction (forecast issued at 11:00am December 21). The wind direction is predicted to be cross-offshore.
| Time (IST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Dec) | 10ft (3.0m) | 16s |
| Afternoon (21 Dec) | 10ft (3.0m) | 16s |
| Evening (21 Dec) | 8ft (2.5m) | 14s |
Table - waves today at Ballyhiernan Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||||||||
| 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 16 | 15 | 14 | 13 | 13 | 16 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 5110 | 4784 | 3970 | 3282 | 2626 | 1997 | 1444 | 1198 | 876 | 658 | 536 | 459 | 346 | 291 | 265 | 299 | 551 | 1210 | 1253 | 1077 | 2578 | 1972 | 2032 | 1504 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | glass | glass | off | off | cross- off | glass | off | glass | glass | glass | on | cross- on | cross- on | cross- on | cross- on | cross |
High Tide / height (m) | 6:43AM 3.13 | 6:57PM 2.89 | 7:18AM 3.14 | 7:31PM 2.84 | 7:54AM 3.11 | 8:06PM 2.76 | ||||||||||||||||||
Low Tide / height (m) | 12:50PM 0.51 | 12:57AM 0.43 | 1:26PM 0.53 | 1:30AM 0.44 | 2:02PM 0.57 | 2:05AM 0.47 | ||||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||||||||
| Sunrise | 8:55 | - | - | - | - | - | - | - | 8:55 | - | - | - | - | - | - | - | 8:56 | - | - | - | - | - | - | - |
| Sunset | - | - | 4:01 | - | - | - | - | - | - | - | 4:01 | - | - | - | - | - | - | - | 4:02 | - | - | - | - | - |
 | | |  |  | | | | |  | | | | | | | | | |  |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - |
| Temp. °C | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 9 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 |
| Feels °C (?) | 2 | 4 | 4 | 4 | 5 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 8 | 9 | 8 | 7 | 9 | 9 | 4 | 4 | 5 | 3 | 4 | 5 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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