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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 12 am 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
8.4° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 6AM is: 2.1m 12s primary swell from a Northwest direction (forecast issued at 11:00pm March 28). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Mar) | 6.5ft (2.0m) | 11s |
| 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 | ||||||||||||||||||||||
| 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 | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 12 | 12 | 11 | 12 | 14 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 16 | 17 | 16 | 16 | 16 | 14 | 14 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2955 | 2173 | 1415 | 1007 | 1035 | 2135 | 5377 | 10943 | 11758 | 10975 | 11139 | 11326 | 11119 | 9633 | 7784 | 7101 | 5469 | 4295 | 3439 | 2140 | 1639 | 1285 | 1037 | 911 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 4:47AM 1.64 | 5:10PM 1.35 | 5:29AM 1.80 | 5:46PM 1.47 | 6:04AM 1.90 | 6:18PM 1.58 | ||||||||||||||||||
Low Tide / height (m) | 10:29PM 0.45 | 11:33AM 0.32 | 11:16PM 0.29 | 12:09PM 0.22 | 11:54PM 0.17 | 12:40PM 0.14 | ||||||||||||||||||
Sunday 29 | Monday 30 | Tuesday 31 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 7:07 | - | - | - | - | - | - | - | 7:05 | - | - | - | - | - | - | - | 7:01 | - | - | - |
| Sunset | - | - | - | - | - | - | - | 7:57 | - | - | - | - | - | - | - | 7:59 | - | - | - | - | - | - | - | 8:00 |
 |  | |  |  |  | |  | | | | | | | | | | | | | |  | | | |
Rain (mm) | - | - | - | 1 | 4 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 7 | 6 | 7 | 7 | 9 | 10 | 9 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 7 | 8 | 10 | 11 | 11 | 11 | 13 | 14 | 13 |
| Feels °C (?) | 2 | 0 | 0 | -1 | 1 | 0 | -3 | -4 | -3 | -3 | -2 | -2 | -1 | 0 | 0 | 1 | 4 | 6 | 7 | 7 | 7 | 8 | 9 | 10 |
- 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
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