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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 11 am Monday 01 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
11.5° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 6PM is: 1.6m 16s primary swell from a Northwest direction (forecast issued at 11:00am December 01). The wind direction is predicted to be cross-onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (01 Dec) | 2.5ft (0.8m) | 12s |
| Afternoon (01 Dec) | 3.5ft (1.1m) | 13s |
| Evening (01 Dec) | 6ft (1.8m) | 15s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | |||||||||||||||||||||
| 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) (?) | 12 | 13 | 13 | 16 | 15 | 15 | 15 | 15 | 16 | 16 | 15 | 15 | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 153 | 295 | 406 | 1210 | 1455 | 1361 | 1254 | 1396 | 1884 | 1799 | 1730 | 1396 | 1244 | 961 | 1045 | 1031 | 1095 | 961 | 857 | 721 | 494 | 347 | 251 | 177 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | off | cross- on | cross | cross- off | cross- off | off | off | cross- off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross- off |
High Tide / height (m) | 2:52PM 1.67 | 3:27AM 1.45 | 3:43PM 1.77 | 4:14AM 1.60 | 4:32PM 1.82 | 4:58AM 1.75 | ||||||||||||||||||
Low Tide / height (m) | 8:26AM 0.44 | 9:30PM 0.27 | 9:26AM 0.33 | 10:15PM 0.18 | 10:22AM 0.21 | 10:58PM 0.12 | ||||||||||||||||||
Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | |||||||||||||||||||||
| Sunrise | 8:27 | - | - | - | - | - | - | - | 8:29 | - | - | - | - | - | - | - | 8:30 | - | - | - | - | - | - | - |
| Sunset | - | - | 4:02 | - | - | - | - | - | - | - | 4:01 | - | - | - | - | - | - | - | 4:00 | - | - | - | - | - |
 |  |  |  | |  |  | | | |  | | |  | | | | | | | | | | | |
Rain (mm) | - | - | 1 | 5 | 4 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 3 | 1 |
| Temp. °C | 8 | 8 | 8 | 6 | 7 | 7 | 7 | 6 | 6 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 7 | 7 | 6 | 5 |
| Feels °C (?) | 4 | 5 | 6 | 3 | 2 | 1 | 0 | -2 | -2 | -1 | 0 | 0 | -1 | 0 | 0 | 1 | 1 | 3 | 2 | 3 | 1 | 1 | 2 | 1 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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