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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 11 am Wednesday 25 Feb 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
7.9° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 4PM is: 0.7m 16s primary swell from a Northwest direction and 0.5m 10s secondary swell from a West direction (forecast issued at 11:00am February 25). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 Feb) | 1.5ft (0.5m) | 20s |
| Afternoon (25 Feb) | 2.5ft (0.7m) | 17s |
| Evening (25 Feb) | 3.5ft (1.1m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | |||||||||||||||||||||
| 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 | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 20 | 16 | 17 | 15 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 11 | 12 | 13 | 13 | 12 | 13 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 192 | 232 | 284 | 242 | 319 | 455 | 431 | 375 | 270 | 226 | 184 | 165 | 137 | 194 | 309 | 418 | 599 | 732 | 784 | 748 | 1482 | 1326 | 1223 | 1185 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | cross- off | off | off | off | cross- off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | on | on | cross- on | cross | cross- off | off |
High Tide / height (m) | 11:52AM 1.20 | 1:00AM 1.22 | 2:10PM 1.16 | 2:55AM 1.36 | 3:34PM 1.26 | 4:00AM 1.57 | ||||||||||||||||||
Low Tide / height (m) | 6:21PM 0.68 | 7:56AM 0.65 | 8:34PM 0.63 | 9:48AM 0.51 | 9:52PM 0.47 | |||||||||||||||||||
Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | |||||||||||||||||||||
| Sunrise | 7:28 | - | - | - | - | - | - | - | 7:24 | - | - | - | - | - | - | - | 7:22 | - | - | - | - | - | - | - |
| Sunset | - | - | 5:52 | - | - | - | - | - | - | - | 5:54 | - | - | - | - | - | - | - | 5:57 | - | - | - | - | - |
 | | |  |  |  | | | |  | | | | | | | | |  | |  | | | | |
Rain (mm) | - | - | - | 1 | - | - | - | - | - | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 10 | 12 | 12 | 11 | 11 | 10 | 11 | 9 | 9 | 9 | 10 | 10 | 8 | 7 | 7 | 6 | 7 | 8 | 6 | 7 | 6 | 5 | 4 | 3 |
| Feels °C (?) | 7 | 9 | 9 | 8 | 6 | 5 | 6 | 5 | 3 | 2 | 4 | 5 | 4 | 3 | 3 | 2 | 4 | 3 | 1 | 2 | 2 | 1 | 0 | -1 |
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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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