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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 pm Tuesday 07 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
8.4° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 3AM is: 1.4m 14s primary swell from a Northwest direction (forecast issued at 06:00pm April 07). An open ocean swell of 0.3m 5s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (08 Apr) | 4.5ft (1.3m) | 14s |
| Afternoon (08 Apr) | 3.5ft (1.1m) | 13s |
| Evening (08 Apr) | 3.5ft (1.0m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 07 | Wednesday 08 | Thursday 09 | Friday 10 | |||||||||||||||||||||
| 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 | 4 AM | 7 AM | 10 AM | 1 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 739 | 666 | 640 | 773 | 752 | 621 | 569 | 437 | 316 | 282 | 319 | 303 | 265 | 190 | 265 | 835 | 2313 | 3659 | 3377 | 2754 | 2457 | 2341 | 2038 | 1760 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | off | cross- on | cross- on | glass | off | cross- off | cross- off | cross- off | off | off | off | cross- off | cross- off | cross | cross | cross | cross | cross- off | off | off | off | off |
High Tide / height (m) | 9:43PM 1.45 | 9:51AM 1.25 | 10:24PM 1.31 | 10:28AM 1.11 | 11:30PM 1.18 | 11:39AM 1.00 | ||||||||||||||||||
Low Tide / height (m) | 3:30PM 0.46 | 4:09AM 0.58 | 4:00PM 0.57 | 5:04AM 0.73 | 4:54PM 0.67 | 7:02AM 0.82 | ||||||||||||||||||
Tuesday 07 | Wednesday 08 | Thursday 09 | Friday 10 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:39 | - | - | - | - | - | - | - | 6:37 | - | - |
| Sunset | - | 8:15 | - | - | - | - | - | - | - | 8:16 | - | - | - | - | - | - | - | 8:17 | - | - | - | - | - | - |
 | |  | |  | |  | | | | | |  |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | 4 | 1 | 1 | - | 1 | 1 | - | - | - | - | - | - |
| Temp. °C | 14 | 13 | 13 | 10 | 8 | 8 | 8 | 11 | 13 | 13 | 10 | 8 | 8 | 7 | 7 | 8 | 7 | 6 | 5 | 5 | 5 | 3 | 5 | 6 |
| Feels °C (?) | 8 | 10 | 11 | 7 | 6 | 7 | 6 | 8 | 10 | 9 | 6 | 3 | 4 | 0 | -2 | -1 | -2 | -3 | -2 | 0 | 0 | -3 | -2 | -3 |
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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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