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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 am Saturday 11 Apr 2026 BSTForecast 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
8.6° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 3PM is: 2.1m 16s primary swell from a West-northwest direction (forecast issued at 06:00am April 11). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Apr) | 6ft (1.9m) | 17s |
| Afternoon (11 Apr) | 7ft (2.1m) | 16s |
| Evening (11 Apr) | 5ft (1.6m) | 14s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 11 | Sunday 12 | Monday 13 | Tue 14 | |||||||||||||||||||||
| 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 14 | 17 | 16 | 16 | 15 | 14 | 13 | 16 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 11 | 11 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 704 | 804 | 2086 | 2498 | 2206 | 1332 | 921 | 680 | 1141 | 1644 | 2368 | 2971 | 2928 | 2762 | 2221 | 1651 | 1013 | 640 | 496 | 377 | 296 | 213 | 150 | 154 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | off | off | off | off | off | off |
High Tide / height (m) | 2:11AM 1.15 | 2:42PM 1.00 | 3:41AM 1.29 | 3:54PM 1.13 | 4:21AM 1.47 | 4:35PM 1.28 | ||||||||||||||||||
Low Tide / height (m) | 9:13AM 0.77 | 8:56PM 0.65 | 10:19AM 0.64 | 9:58PM 0.53 | 10:58AM 0.48 | 10:41PM 0.39 | ||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tue 14 | |||||||||||||||||||||
| Sunrise | - | 6:33 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - | - | - | 6:28 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 8:22 | - | - | - | - | - | - | - | 8:23 | - | - | - | - | - | - | - | 8:25 | - | - |
 |  |  |  | | |  |  |  |  | | | | | | | | | | |  | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 1 | - |
| Temp. °C | 4 | 4 | 4 | 7 | 8 | 7 | 5 | 6 | 7 | 7 | 7 | 8 | 9 | 8 | 6 | 4 | 4 | 3 | 6 | 9 | 9 | 9 | 8 | 5 |
| Feels °C (?) | -3 | -5 | -6 | -2 | -1 | -2 | -1 | -2 | -1 | -3 | -3 | -2 | 1 | 1 | 0 | -1 | -1 | -2 | 1 | 4 | 5 | 6 | 5 | 1 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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