- Forecast
- Maps
- Live
- Weather State
- Spot Information
Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 5 pm Tuesday 24 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 9PM is: 2.4m 14s primary swell from a Northwest direction (forecast issued at 05:00pm March 24). The wind direction is predicted to be cross-onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (24 Mar) | - | - |
| Afternoon (24 Mar) | 8ft (2.5m) | 15s |
| Evening (24 Mar) | 8ft (2.4m) | 14s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | |||||||||||||||||||||
| 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) (?) | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 11 | 21 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3357 | 2747 | 2065 | 2187 | 2878 | 3852 | 5092 | 4579 | 3521 | 2988 | 2555 | 2456 | 2108 | 1847 | 1365 | 899 | 661 | 406 | 338 | 286 | 348 | 437 | 462 | 6935 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- off | cross- off | off | cross- off | off | cross- off | cross- on | cross | cross | cross- off | cross |
High Tide / height (m) | 9:37PM 1.47 | 10:10AM 1.26 | 10:53PM 1.33 | 11:52AM 1.07 | 1:09AM 1.31 | |||||||||||||||||||
Low Tide / height (m) | 3:23PM 0.44 | 4:08AM 0.49 | 4:23PM 0.59 | 5:59AM 0.64 | 6:13PM 0.68 | 8:24AM 0.61 | ||||||||||||||||||
Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 6:18 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:11 | - |
| Sunset | - | 6:46 | - | - | - | - | - | - | - | 6:49 | - | - | - | - | - | - | - | 6:51 | - | - | - | - | - | - |
 | |  | | | | |  | | |  |  | | |  |  | | | | |  | | | | |
Rain (mm) | 2 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - | - | - | 1 | 2 | - | - | - | 1 |
| Temp. °C | 7 | 6 | 6 | 6 | 4 | 4 | 5 | 6 | 6 | 5 | 6 | 6 | 5 | 5 | 5 | 5 | 6 | 7 | 10 | 9 | 8 | 7 | 8 | 7 |
| Feels °C (?) | -2 | -2 | -1 | -2 | -7 | -9 | -7 | -6 | -6 | -5 | -2 | -1 | 0 | 1 | 0 | -1 | -1 | 2 | 6 | 4 | 3 | 2 | 2 | 0 |
- 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
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.
Nearest