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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 am Tuesday 31 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 1PM is: 1.9m 14s primary swell from a Northwest direction (forecast issued at 06:00am March 31). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Mar) | 7ft (2.1m) | 14s |
| Afternoon (31 Mar) | 6ft (1.8m) | 13s |
| Evening (31 Mar) | 5ft (1.6m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 31 | Wednesday 01 | Thursday 02 | Fri 03 | |||||||||||||||||||||
| 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 | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 7 | 7 | 8 | 10 | 13 | 12 | 11 | 11 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3130 | 2140 | 1587 | 1304 | 969 | 838 | 838 | 784 | 772 | 635 | 514 | 353 | 211 | 160 | 301 | 204 | 201 | 246 | 594 | 414 | 278 | 194 | 177 | 145 |
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- off | cross- off | off | off | off | cross- off | cross- off | on | cross- on | on | on | cross- on | cross- off | off | off | off | off | off | off |
High Tide / height (m) | 6:04AM 1.90 | 6:18PM 1.58 | 6:36AM 1.94 | 6:48PM 1.66 | 7:06AM 1.93 | 7:16PM 1.71 | ||||||||||||||||||
Low Tide / height (m) | 12:40PM 0.14 | 12:28AM 0.08 | 1:07PM 0.11 | 1:00AM 0.05 | 1:32PM 0.10 | |||||||||||||||||||
Tuesday 31 | Wednesday 01 | Thursday 02 | Fri 03 | |||||||||||||||||||||
| Sunrise | - | - | 7:01 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | 6:56 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 8:00 | - | - | - | - | - | - | - | 8:02 | - | - | - | - | - | - | - | 8:05 | - | - |
 | |  |  |  | | | | | | |  | | |  | |  | | | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | 1 | 5 | - | - | - | - | - | - | - | - | - | 1 | 1 |
| Temp. °C | 13 | 12 | 11 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 11 | 11 | 6 | 6 | 6 | 6 | 5 | 3 | 5 | 7 | 8 | 7 | 7 | 7 |
| Feels °C (?) | 9 | 9 | 7 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 7 | 7 | -2 | -3 | -2 | 0 | 2 | -1 | 1 | 1 | 2 | 1 | 1 | 1 |
- 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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