- 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 6 pm Sunday 29 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
8.3° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 9PM is: 4.5m 16s primary swell from a Northwest direction (forecast issued at 06:00pm March 29). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Mar) | - | - |
| Afternoon (29 Mar) | 11ft (3.5m) | 14s |
| Evening (29 Mar) | 15ft (4.5m) | 16s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 29 | Monday 30 | Tuesday 31 | Wednesday 01 | |||||||||||||||||||||
| 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) (?) | 14 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 6441 | 11823 | 11528 | 10303 | 11139 | 11926 | 11253 | 9296 | 7502 | 6304 | 4765 | 3856 | 3288 | 2140 | 1712 | 1324 | 1069 | 940 | 838 | 851 | 699 | 580 | 414 | 309 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross | cross | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross- off | off | off | off | cross- off |
High Tide / height (m) | 5:10PM 1.35 | 5:29AM 1.80 | 5:46PM 1.47 | 6:04AM 1.90 | 6:18PM 1.58 | 6:36AM 1.94 | ||||||||||||||||||
Low Tide / height (m) | 11:16PM 0.29 | 12:09PM 0.22 | 11:54PM 0.17 | 12:40PM 0.14 | 12:28AM 0.08 | |||||||||||||||||||
Sunday 29 | Monday 30 | Tuesday 31 | Wednesday 01 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 7:05 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:00 | - |
| Sunset | - | 7:57 | - | - | - | - | - | - | - | 7:59 | - | - | - | - | - | - | - | 8:00 | - | - | - | - | - | - |
 |  |  | |  | |  | | | | | | | | |  | | | | | | | | | |
Rain (mm) | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 8 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 7 | 8 | 10 | 11 | 11 | 12 | 13 | 13 | 13 | 11 | 11 | 11 | 10 | 11 | 12 |
| Feels °C (?) | -4 | -5 | -4 | -3 | -3 | -3 | -2 | -1 | 1 | 1 | 5 | 5 | 6 | 7 | 8 | 9 | 9 | 9 | 7 | 8 | 7 | 6 | 6 | 6 |
- 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