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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 am Monday 30 Mar 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
8.2° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 11AM is: 4.0m 17s primary swell from a Northwest direction (forecast issued at 06:00am March 30). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Mar) | 15ft (4.5m) | 17s |
| Afternoon (30 Mar) | 13ft (4.0m) | 17s |
| Evening (30 Mar) | 11ft (3.5m) | 16s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 30 | Tuesday 31 | Wednesday 01 | Thu 02 | |||||||||||||||||||||
| 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) (?) | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 10 | 9 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 10808 | 10865 | 10669 | 8777 | 6963 | 6095 | 4826 | 3689 | 3130 | 2004 | 1587 | 1304 | 969 | 851 | 838 | 784 | 772 | 570 | 514 | 353 | 247 | 677 | 827 | 601 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | off | cross- off | cross- on | cross- on | cross- on |
High Tide / height (m) | 5:29AM 1.80 | 5:46PM 1.47 | 6:04AM 1.90 | 6:18PM 1.58 | 6:36AM 1.94 | 6:48PM 1.66 | ||||||||||||||||||
Low Tide / height (m) | 12:09PM 0.22 | 11:54PM 0.17 | 12:40PM 0.14 | 12:28AM 0.08 | 1:07PM 0.11 | 1:00AM 0.05 | ||||||||||||||||||
Monday 30 | Tuesday 31 | Wednesday 01 | Thu 02 | |||||||||||||||||||||
| Sunrise | - | - | 7:05 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - |
| Sunset | - | - | - | - | - | 7:59 | - | - | - | - | - | - | - | 8:00 | - | - | - | - | - | - | - | 8:02 | - | - |
 | |  | | |  |  | | | | |  | | | | | | | | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - |
| Temp. °C | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 10 | 11 | 11 | 13 | 12 | 14 | 13 | 11 | 11 | 11 | 11 | 10 | 12 | 11 | 4 | 5 | 5 |
| Feels °C (?) | -3 | -3 | -2 | -1 | 1 | 2 | 4 | 5 | 7 | 6 | 9 | 8 | 10 | 9 | 7 | 7 | 7 | 7 | 5 | 6 | 4 | -5 | -3 | -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)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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