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Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 5 am Sunday 07 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castlerock sea temperature is
10.8° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 9AM is: 0.8m 14s primary swell from a West-northwest direction (forecast issued at 05:00am December 07). An open ocean swell of 0.4m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Dec) | 2.5ft (0.8m) | 14s |
| Afternoon (07 Dec) | 1.5ft (0.5m) | 14s |
| Evening (07 Dec) | 1.5ft (0.4m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 07 | Monday 08 | Tuesday 09 | Wed 10 | |||||||||||||||||||||
| 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 | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 23 | 21 | 20 | 18 | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 334 | 297 | 226 | 178 | 113 | 101 | 67 | 66 | 64 | 82 | 361 | 746 | 957 | 1172 | 911 | 838 | 635 | 532 | 532 | 436 | 382 | 344 | 264 | 170 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | cross- off | cross- off | cross | cross- off | off | off | off | cross- off | cross- off | cross- off | off | off | off | off | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 7:14AM 1.93 | 7:34PM 1.56 | 8:02AM 1.88 | 8:18PM 1.42 | 8:54AM 1.79 | 9:05PM 1.28 | ||||||||||||||||||
Low Tide / height (m) | 1:04AM 0.12 | 1:53PM 0.15 | 1:47AM 0.16 | 2:48PM 0.26 | 2:32AM 0.22 | 3:45PM 0.38 | ||||||||||||||||||
Sunday 07 | Monday 08 | Tuesday 09 | Wed 10 | |||||||||||||||||||||
| Sunrise | - | - | 8:37 | - | - | - | - | - | - | - | 8:37 | - | - | - | - | - | - | - | 8:38 | - | - | - | - | - |
| Sunset | - | - | - | - | 3:59 | - | - | - | - | - | - | - | 3:57 | - | - | - | - | - | - | - | 3:57 | - | - | - |
 |  |  |  |  |  | | | | | | | | | | | |  | |  |  | | | | |
Rain (mm) | - | - | - | 7 | 11 | - | - | - | - | - | - | - | - | - | - | - | - | 6 | 6 | 1 | 1 | - | - | - |
| Temp. °C | 9 | 8 | 9 | 11 | 9 | 10 | 9 | 9 | 9 | 9 | 8 | 10 | 10 | 9 | 8 | 8 | 8 | 10 | 13 | 15 | 14 | 10 | 10 | 9 |
| Feels °C (?) | 5 | 4 | 4 | 7 | 4 | 5 | 4 | 3 | 3 | 1 | 1 | 3 | 4 | 4 | 3 | 3 | 4 | 2 | 6 | 9 | 6 | 3 | 4 | 4 |
- 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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