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Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 5 am Saturday 06 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
10.9° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 9AM is: 0.7m 19s primary swell from a West-northwest direction and 0.6m 12s secondary swell from a West-northwest direction (forecast issued at 05:00am December 06). The wind direction is predicted to be offshore and the swell rating is 2.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (06 Dec) | 2.5ft (0.7m) | 19s |
| Afternoon (06 Dec) | 4.5ft (1.3m) | 18s |
| Evening (06 Dec) | 3.5ft (1.1m) | 16s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 06 | Sunday 07 | Monday 08 | Tue 09 | |||||||||||||||||||||
| 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) (?) | 13 | 13 | 19 | 19 | 18 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 9 | 13 | 13 | 23 | 21 | 20 | 18 | 18 | 17 | 17 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 205 | 170 | 315 | 742 | 943 | 726 | 620 | 434 | 334 | 297 | 226 | 158 | 113 | 69 | 67 | 66 | 55 | 83 | 365 | 753 | 1267 | 1186 | 998 | 921 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | cross- off | cross- off | cross- off | off | cross- off | cross- off | off | cross- off | cross- off | off | off | off | cross- off | cross- off | off | off | off | cross- off | cross- off |
High Tide / height (m) | 6:28AM 1.92 | 6:50PM 1.69 | 7:14AM 1.93 | 7:34PM 1.56 | 8:02AM 1.88 | 8:18PM 1.42 | ||||||||||||||||||
Low Tide / height (m) | 12:22AM 0.10 | 1:00PM 0.08 | 1:04AM 0.12 | 1:53PM 0.15 | 1:47AM 0.16 | 2:48PM 0.26 | ||||||||||||||||||
Saturday 06 | Sunday 07 | Monday 08 | Tue 09 | |||||||||||||||||||||
| Sunrise | - | - | 8:34 | - | - | - | - | - | - | - | 8:37 | - | - | - | - | - | - | - | 8:37 | - | - | - | - | - |
| Sunset | - | - | - | - | 3:59 | - | - | - | - | - | - | - | 3:59 | - | - | - | - | - | - | - | 3:57 | - | - | - |
 |  |  | |  | |  |  | | |  |  |  | | | | | |  | | | | | | |
Rain (mm) | 1 | - | - | - | - | - | - | - | - | - | 1 | 6 | 6 | - | - | - | 1 | - | - | - | - | - | - | - |
| Temp. °C | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 9 | 8 | 9 | 11 | 9 | 9 | 8 | 8 | 8 | 9 | 8 | 10 | 10 | 8 | 8 | 8 |
| Feels °C (?) | 5 | 5 | 6 | 6 | 7 | 7 | 6 | 6 | 6 | 4 | 3 | 6 | 4 | 4 | 3 | 3 | 3 | 2 | 1 | 4 | 5 | 4 | 4 | 3 |
- 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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