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:
Rossnowlagh surfForecast / Donegal / Ireland
48hr Weather and Surf, issued 11 pm Thursday 18 Dec 2025 ISTForecast update in hr min s Forecast update imminent
Rossnowlagh surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Rossnowlagh sea temperature is
8.7° C
(Which is 1.6°C colder than average for this time of year)How big are the waves at Rossnowlagh today?
The current surf forecast for Rossnowlagh at 6AM is: 4.5m 16s primary swell from a West direction (forecast issued at 11:00pm December 18). The wind direction is predicted to be cross-onshore.
| Time (IST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Dec) | 16ft (5.0m) | 16s |
| Afternoon (19 Dec) | 13ft (4.0m) | 16s |
| Evening (19 Dec) | 10ft (3.0m) | 14s |
Table - waves today at Rossnowlagh. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 19 | Saturday 20 | Sunday 21 | ||||||||||||||||||||||
| 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 | 9 AM | 12 PM | 3 PM | 6 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 13 | 12 | 14 | 16 | 16 | 16 | 16 | 16 | 16 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 13004 | 12470 | 11256 | 10971 | 11791 | 10568 | 8428 | 5559 | 3709 | 2291 | 1659 | 1173 | 855 | 775 | 903 | 964 | 1922 | 4506 | 5522 | 6058 | 5718 | 5254 | 4466 | 3666 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross | cross- off | off | off | off | cross- off | cross- off | off |
High Tide / height (m) | 5:11AM 3.22 | 5:26PM 3.00 | 5:47AM 3.31 | 6:02PM 3.02 | 6:23AM 3.38 | |||||||||||||||||||
Low Tide / height (m) | 10:49PM 0.58 | 11:18AM 0.62 | 11:24PM 0.51 | 11:54AM 0.56 | 11:58PM 0.46 | 12:30PM 0.55 | ||||||||||||||||||
Friday 19 | Saturday 20 | Sunday 21 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 8:51 | - | - | - | - | - | - | - | 8:52 | - | - | - | - | - | - | - | 8:52 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:07 | - | - | - | - | - | - | - | 4:07 | - | - | - | - | - | - | - | 4:07 | - |
 |  |  | |  | |  |  | | | | | | | | | | | | |  | | | | |
Rain (mm) | - | 2 | 2 | 2 | 2 | 1 | - | - | - | - | - | - | - | - | 1 | - | - | - | - | 3 | 1 | - | - | 1 |
| Temp. °C | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 9 | 9 | 9 | 8 | 7 | 6 | 5 | 5 | 4 | 3 | 4 | 6 | 7 |
| Feels °C (?) | 0 | 0 | 1 | 0 | -1 | 0 | 2 | 4 | 3 | 2 | 0 | 2 | 1 | 1 | 0 | 0 | 2 | 2 | 2 | 1 | 0 | 0 | 2 | 2 |
- 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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