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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 12 am Sunday 05 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
8.3° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 3AM is: 2.4m 8s primary swell from a Northwest direction and 1.3m 13s secondary swell from a Northwest direction (forecast issued at 12:00am April 05). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (05 Apr) | 4.5ft (1.3m) | 13s |
| Afternoon (05 Apr) | 7ft (2.1m) | 13s |
| Evening (05 Apr) | 6ft (1.8m) | 11s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 05 | Monday 06 | Tuesday 07 | ||||||||||||||||||||||
| 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 | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 8 | 13 | 13 | 13 | 13 | 13 | 11 | 11 | 11 | 12 | 11 | 11 | 12 | 12 | 12 | 12 | 19 | 19 | 18 | 17 | 17 | 16 | 16 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1208 | 1332 | 570 | 562 | 609 | 1518 | 1305 | 794 | 770 | 734 | 748 | 544 | 414 | 338 | 268 | 200 | 139 | 507 | 1216 | 1149 | 1098 | 919 | 875 | 917 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross | cross | cross | cross | cross | cross- off | cross- off | off | off | cross- off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 8:12PM 1.71 | 8:28AM 1.66 | 8:40PM 1.66 | 8:54AM 1.53 | 9:10PM 1.57 | 9:22AM 1.38 | ||||||||||||||||||
Low Tide / height (m) | 2:31AM 0.18 | 2:42PM 0.26 | 3:02AM 0.29 | 3:06PM 0.35 | 3:33AM 0.43 | 3:30PM 0.46 | ||||||||||||||||||
Sunday 05 | Monday 06 | Tuesday 07 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:50 | - | - | - | - | - | - | - | 6:47 | - | - | - | - | - | - | - | 6:43 | - | - | - | - |
| Sunset | - | - | - | - | - | - | - | 8:10 | - | - | - | - | - | - | - | 8:13 | - | - | - | - | - | - | - | 8:15 |
 |  | |  | |  | |  | |  |  |  | | | |  | | | | | | | | | |
Rain (mm) | 4 | - | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 4 | 5 | 5 | 4 | 5 | 6 | 7 | 7 | 5 | 5 | 4 | 4 | 7 | 10 | 10 | 10 | 9 | 8 | 8 | 9 | 10 | 11 | 12 | 12 |
| Feels °C (?) | -9 | -6 | -4 | -5 | -4 | -3 | -2 | 0 | 0 | 0 | -2 | -2 | 0 | 2 | 3 | 4 | 3 | 2 | 2 | 3 | 3 | 4 | 6 | 8 |
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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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