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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 5 pm Thursday 26 Mar 2026 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
8.4° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 2AM is: 1.3m 11s primary swell from a Northwest direction (forecast issued at 05:00pm March 26). An open ocean swell of 0.2m 3s is not directed at the surf break, a second open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Mar) | 6.5ft (2.0m) | 14s |
| Afternoon (27 Mar) | 13ft (4.0m) | 19s |
| Evening (27 Mar) | 15ft (4.5m) | 18s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 26 | Friday 27 | Saturday 28 | Sunday 29 | |||||||||||||||||||||
| 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 | 9 AM | 12 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 11 | 11 | 10 | 11 | 14 | 20 | 19 | 18 | 18 | 17 | 17 | 16 | 16 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 614 | 420 | 338 | 292 | 355 | 453 | 1401 | 8693 | 11837 | 11232 | 11722 | 12124 | 12591 | 10631 | 9376 | 8457 | 7314 | 6291 | 3891 | 2737 | 1828 | 1223 | 946 | 1327 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | cross | cross | cross | cross- off | cross | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross- off | off | cross- off | cross- off | cross- off |
High Tide / height (m) | 1:09AM 1.31 | 2:17PM 1.09 | 2:51AM 1.46 | 3:27PM 1.21 | 3:47AM 1.64 | |||||||||||||||||||
Low Tide / height (m) | 6:13PM 0.68 | 8:24AM 0.61 | 8:17PM 0.61 | 9:46AM 0.46 | 9:29PM 0.45 | 10:33AM 0.32 | ||||||||||||||||||
Thursday 26 | Friday 27 | Saturday 28 | Sunday 29 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 6:11 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:07 | - |
| Sunset | - | 6:51 | - | - | - | - | - | - | - | 6:52 | - | - | - | - | - | - | - | 6:54 | - | - | - | - | - | - |
 | |  | |  | |  |  | | |  | | |  | | | |  | | | | |  | | |
Rain (mm) | - | - | 1 | 1 | - | - | - | 1 | - | - | - | - | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - | 2 | 2 |
| Temp. °C | 7 | 8 | 9 | 8 | 7 | 6 | 7 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 6 | 6 | 5 | 6 | 6 | 10 |
| Feels °C (?) | 1 | 3 | 4 | 3 | 2 | 1 | 1 | -2 | -2 | -3 | -3 | -5 | -5 | -6 | -5 | -5 | -5 | -2 | 0 | 1 | -2 | -2 | -3 | 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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