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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 5 am Saturday 28 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 11AM is: 4.5m 16s primary swell from a Northwest direction (forecast issued at 05:00am March 28). The wind direction is predicted to be cross-onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 Mar) | 16ft (5.0m) | 16s |
| Afternoon (28 Mar) | 13ft (4.0m) | 14s |
| Evening (28 Mar) | 10ft (3.0m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 28 | Sunday 29 | Monday 30 | Tue 31 | |||||||||||||||||||||
| 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 | 3 PM | 6 PM | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 17 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 12 | 14 | 16 | 16 | 16 | 17 | 18 | 17 | 17 | 16 | 16 | 16 | 16 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 11865 | 12930 | 11185 | 8840 | 6612 | 4708 | 3123 | 2313 | 1415 | 1007 | 947 | 1735 | 4944 | 9908 | 11249 | 10843 | 11450 | 11247 | 9976 | 8642 | 6445 | 5537 | 4295 | 3483 |
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- 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 |
High Tide / height (m) | 2:51AM 1.46 | 3:27PM 1.21 | 3:47AM 1.64 | 4:10PM 1.35 | 4:29AM 1.80 | 4:46PM 1.47 | ||||||||||||||||||
Low Tide / height (m) | 9:46AM 0.46 | 9:29PM 0.45 | 10:33AM 0.32 | 10:16PM 0.29 | 11:09AM 0.22 | 10:54PM 0.17 | ||||||||||||||||||
Saturday 28 | Sunday 29 | Monday 30 | Tue 31 | |||||||||||||||||||||
| Sunrise | - | - | 6:09 | - | - | - | - | - | - | - | 6:07 | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - |
| Sunset | - | - | - | - | - | 6:54 | - | - | - | - | - | - | - | 6:57 | - | - | - | - | - | - | - | 6:59 | - | - |
 | |  |  | |  |  |  | |  |  | | | | | | | | | | |  | | | |
Rain (mm) | 1 | 1 | - | 1 | 1 | - | - | - | - | 1 | 4 | 1 | - | 1 | - | - | 1 | - | - | - | - | - | - | - |
| Temp. °C | 5 | 5 | 6 | 6 | 6 | 7 | 6 | 6 | 6 | 7 | 9 | 10 | 9 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 10 |
| Feels °C (?) | -6 | -6 | -5 | -5 | -4 | -1 | 1 | 1 | -1 | -1 | 0 | 1 | -2 | -4 | -3 | -2 | -2 | -2 | -1 | -1 | 0 | 2 | 5 | 6 |
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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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