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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 pm Monday 06 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 10PM is: 0.6m 12s primary swell from a Northwest direction and 0.4m 21s secondary swell from a Northwest direction (forecast issued at 06:00pm April 06). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (06 Apr) | - | - |
| Afternoon (06 Apr) | 3ft (0.9m) | 12s |
| Evening (06 Apr) | 1.5ft (0.4m) | 21s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 06 | Tuesday 07 | Wednesday 08 | Thursday 09 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 21 | 19 | 19 | 18 | 17 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 197 | 169 | 118 | 1033 | 1441 | 1278 | 975 | 875 | 739 | 666 | 805 | 784 | 752 | 630 | 577 | 437 | 418 | 287 | 205 | 265 | 261 | 230 | 401 | 398 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | glass | glass | cross- on | glass | glass | glass | off | off | off | cross | cross | cross | cross |
High Tide / height (m) | 9:10PM 1.57 | 9:22AM 1.38 | 9:43PM 1.45 | 9:51AM 1.25 | 10:24PM 1.31 | 10:28AM 1.11 | ||||||||||||||||||
Low Tide / height (m) | 3:06PM 0.35 | 3:33AM 0.43 | 3:30PM 0.46 | 4:09AM 0.58 | 4:00PM 0.57 | 5:04AM 0.73 | ||||||||||||||||||
Monday 06 | Tuesday 07 | Wednesday 08 | Thursday 09 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:39 | - | - |
| Sunset | - | 8:13 | - | - | - | - | - | - | - | 8:15 | - | - | - | - | - | - | - | 8:16 | - | - | - | - | - | - |
 |  |  | |  |  | | | | |  | | | | | | | | | |  |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3 | 1 | 1 | 1 |
| Temp. °C | 11 | 10 | 9 | 8 | 7 | 7 | 10 | 13 | 14 | 13 | 13 | 12 | 11 | 10 | 9 | 11 | 10 | 11 | 10 | 8 | 8 | 7 | 7 | 7 |
| Feels °C (?) | 4 | 4 | 3 | 3 | 2 | 1 | 4 | 8 | 8 | 9 | 10 | 12 | 11 | 9 | 8 | 11 | 9 | 9 | 6 | 3 | 3 | -1 | -1 | -2 |
- 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.
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