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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 11 am Monday 17 Nov 2025 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
12.4° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 7PM is: 0.6m 7s primary swell from a North-northwest direction and 0.2m 12s secondary swell from a West-northwest direction (forecast issued at 11:00am November 17). The wind direction is predicted to be cross-shore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Nov) | 3.5ft (1.1m) | 6s |
| Afternoon (17 Nov) | 2.5ft (0.8m) | 7s |
| Evening (17 Nov) | 1.5ft (0.5m) | 7s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||||||||
| 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 | 3 AM | 6 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 5 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 97 | 68 | 58 | 37 | 26 | 19 | 18 | 27 | 43 | 122 | 284 | 178 | 346 | 644 | 655 | 745 | 865 | 782 | 725 | 725 | 744 | 599 | 520 | 397 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- on | cross | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on | on | on | on |
High Tide / height (m) | 4:23PM 1.63 | 4:42AM 1.54 | 4:53PM 1.64 | 5:11AM 1.62 | 5:22PM 1.63 | 5:40AM 1.67 | ||||||||||||||||||
Low Tide / height (m) | 10:17AM 0.34 | 10:48PM 0.27 | 10:54AM 0.30 | 11:14PM 0.24 | 11:28AM 0.27 | 11:41PM 0.22 | ||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||||||||
| Sunrise | 8:02 | - | - | - | - | - | - | - | 8:03 | - | - | - | - | - | - | - | 8:06 | - | - | - | - | - | - | - |
| Sunset | - | - | 4:20 | - | - | - | - | - | - | - | 4:19 | - | - | - | - | - | - | - | 4:16 | - | - | - | - | - |
 |  |  |  | | |  | |  |  | | | | | | | | | | | | | |  | |
Rain (mm) | - | - | - | - | - | - | 2 | 1 | 1 | 2 | 1 | 1 | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Temp. °C | 7 | 8 | 8 | 8 | 7 | 6 | 6 | 8 | 8 | 9 | 9 | 7 | 6 | 5 | 5 | 6 | 6 | 6 | 6 | 5 | 6 | 5 | 6 | 5 |
| Feels °C (?) | 2 | 4 | 5 | 4 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | -2 | -4 | -6 | -6 | -4 | -4 | -4 | -4 | -6 | -4 | -4 | -3 | -3 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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